diff options
Diffstat (limited to 'render/layout.c')
| -rw-r--r-- | render/layout.c | 3409 |
1 files changed, 1770 insertions, 1639 deletions
diff --git a/render/layout.c b/render/layout.c index 7ca688fab..f6b774a6e 100644 --- a/render/layout.c +++ b/render/layout.c @@ -68,9 +68,64 @@ /* Fixed point percentage (a) of an integer (b), to an integer */ #define FPCT_OF_INT_TOINT(a, b) (FIXTOINT(FDIV((a * b), F_100))) +typedef uint8_t (*css_len_func)( + const css_computed_style *style, + css_fixed *length, css_unit *unit); +typedef uint8_t (*css_border_style_func)( + const css_computed_style *style); +typedef uint8_t (*css_border_color_func)( + const css_computed_style *style, + css_color *color); + +/** Array of per-side access functions for computed style margins. */ +static const css_len_func margin_funcs[4] = { + [TOP] = css_computed_margin_top, + [RIGHT] = css_computed_margin_right, + [BOTTOM] = css_computed_margin_bottom, + [LEFT] = css_computed_margin_left, +}; + +/** Array of per-side access functions for computed style paddings. */ +static const css_len_func padding_funcs[4] = { + [TOP] = css_computed_padding_top, + [RIGHT] = css_computed_padding_right, + [BOTTOM] = css_computed_padding_bottom, + [LEFT] = css_computed_padding_left, +}; + +/** Array of per-side access functions for computed style border_widths. */ +static const css_len_func border_width_funcs[4] = { + [TOP] = css_computed_border_top_width, + [RIGHT] = css_computed_border_right_width, + [BOTTOM] = css_computed_border_bottom_width, + [LEFT] = css_computed_border_left_width, +}; + +/** Array of per-side access functions for computed style border styles. */ +static const css_border_style_func border_style_funcs[4] = { + [TOP] = css_computed_border_top_style, + [RIGHT] = css_computed_border_right_style, + [BOTTOM] = css_computed_border_bottom_style, + [LEFT] = css_computed_border_left_style, +}; + +/** Array of per-side access functions for computed style border colors. */ +static const css_border_color_func border_color_funcs[4] = { + [TOP] = css_computed_border_top_color, + [RIGHT] = css_computed_border_right_color, + [BOTTOM] = css_computed_border_bottom_color, + [LEFT] = css_computed_border_left_color, +}; + /* forward declaration to break cycles */ -static bool layout_block_context(struct box *block, int viewport_height, html_content *content); -static void layout_minmax_block(struct box *block, const struct gui_layout_table *font_func); +static bool layout_block_context( + struct box *block, + int viewport_height, + html_content *content); +static void layout_minmax_block( + struct box *block, + const struct gui_layout_table *font_func, + const html_content *content); /** @@ -179,7 +234,9 @@ layout_get_object_dimensions(struct box *box, * \param width width of containing block * \return length of indent */ -static int layout_text_indent(const css_computed_style *style, int width) +static int layout_text_indent( + const nscss_len_ctx *len_ctx, + const css_computed_style *style, int width) { css_fixed value = 0; css_unit unit = CSS_UNIT_PX; @@ -189,7 +246,7 @@ static int layout_text_indent(const css_computed_style *style, int width) if (unit == CSS_UNIT_PCT) { return FPCT_OF_INT_TOINT(value, width); } else { - return FIXTOINT(nscss_len2px(value, unit, style)); + return FIXTOINT(nscss_len2px(len_ctx, value, unit, style)); } } @@ -197,6 +254,7 @@ static int layout_text_indent(const css_computed_style *style, int width) /** * Determine width of margin, borders, and padding on one side of a box. * + * \param len_ctx CSS length conversion context for document * \param style style to measure * \param side side of box to measure * \param margin whether margin width is required @@ -206,7 +264,8 @@ static int layout_text_indent(const css_computed_style *style, int width) * \param frac increased by sum of fractional margin and padding */ static void -calculate_mbp_width(const css_computed_style *style, +calculate_mbp_width(const nscss_len_ctx *len_ctx, + const css_computed_style *style, unsigned int side, bool margin, bool border, @@ -214,35 +273,6 @@ calculate_mbp_width(const css_computed_style *style, int *fixed, float *frac) { - typedef uint8_t (*len_func)(const css_computed_style *style, - css_fixed *length, css_unit *unit); - - static len_func margin_funcs[4] = { - css_computed_margin_top, - css_computed_margin_right, - css_computed_margin_bottom, - css_computed_margin_left - }; - static len_func padding_funcs[4] = { - css_computed_padding_top, - css_computed_padding_right, - css_computed_padding_bottom, - css_computed_padding_left - }; - static struct { - len_func width; - uint8_t (*style)(const css_computed_style *style); - } border_funcs[4] = { - { css_computed_border_top_width, - css_computed_border_top_style }, - { css_computed_border_right_width, - css_computed_border_right_style }, - { css_computed_border_bottom_width, - css_computed_border_bottom_style }, - { css_computed_border_left_width, - css_computed_border_left_style } - }; - css_fixed value = 0; css_unit unit = CSS_UNIT_PX; @@ -257,19 +287,20 @@ calculate_mbp_width(const css_computed_style *style, if (unit == CSS_UNIT_PCT) { *frac += FIXTOINT(FDIV(value, F_100)); } else { - *fixed += FIXTOINT(nscss_len2px(value, unit, - style)); + *fixed += FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); } } } /* border */ if (border) { - if (border_funcs[side].style(style) != + if (border_style_funcs[side](style) != CSS_BORDER_STYLE_NONE) { - border_funcs[side].width(style, &value, &unit); + border_width_funcs[side](style, &value, &unit); - *fixed += FIXTOINT(nscss_len2px(value, unit, style)); + *fixed += FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); } } @@ -279,9 +310,197 @@ calculate_mbp_width(const css_computed_style *style, if (unit == CSS_UNIT_PCT) { *frac += FIXTOINT(FDIV(value, F_100)); } else { - *fixed += FIXTOINT(nscss_len2px(value, unit, style)); + *fixed += FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); + } + } +} + + +/** + * Calculate minimum and maximum width of a table. + * + * \param table box of type TABLE + * \param font_func Font functions + * \param content The HTML content we are laying out. + * \post table->min_width and table->max_width filled in, + * 0 <= table->min_width <= table->max_width + */ +static void layout_minmax_table(struct box *table, + const struct gui_layout_table *font_func, + const html_content *content) +{ + unsigned int i, j; + int border_spacing_h = 0; + int table_min = 0, table_max = 0; + int extra_fixed = 0; + float extra_frac = 0; + struct column *col; + struct box *row_group, *row, *cell; + enum css_width_e wtype; + css_fixed value = 0; + css_unit unit = CSS_UNIT_PX; + + /* check if the widths have already been calculated */ + if (table->max_width != UNKNOWN_MAX_WIDTH) + return; + + if (table_calculate_column_types(&content->len_ctx, table) == false) { + NSLOG(netsurf, WARNING, + "Could not establish table column types."); + return; + } + col = table->col; + + /* start with 0 except for fixed-width columns */ + for (i = 0; i != table->columns; i++) { + if (col[i].type == COLUMN_WIDTH_FIXED) + col[i].min = col[i].max = col[i].width; + else + col[i].min = col[i].max = 0; + } + + /* border-spacing is used in the separated borders model */ + if (css_computed_border_collapse(table->style) == + CSS_BORDER_COLLAPSE_SEPARATE) { + css_fixed h = 0, v = 0; + css_unit hu = CSS_UNIT_PX, vu = CSS_UNIT_PX; + + css_computed_border_spacing(table->style, &h, &hu, &v, &vu); + + border_spacing_h = FIXTOINT(nscss_len2px(&content->len_ctx, + h, hu, table->style)); + } + + /* 1st pass: consider cells with colspan 1 only */ + for (row_group = table->children; row_group; row_group =row_group->next) + for (row = row_group->children; row; row = row->next) + for (cell = row->children; cell; cell = cell->next) { + assert(cell->type == BOX_TABLE_CELL); + assert(cell->style); + /** TODO: Handle colspan="0" correctly. + * It's currently converted to 1 in box normaisation */ + assert(cell->columns != 0); + + if (cell->columns != 1) + continue; + + layout_minmax_block(cell, font_func, content); + i = cell->start_column; + + if (col[i].positioned) + continue; + + /* update column min, max widths using cell widths */ + if (col[i].min < cell->min_width) + col[i].min = cell->min_width; + if (col[i].max < cell->max_width) + col[i].max = cell->max_width; + } + + /* 2nd pass: cells which span multiple columns */ + for (row_group = table->children; row_group; row_group =row_group->next) + for (row = row_group->children; row; row = row->next) + for (cell = row->children; cell; cell = cell->next) { + unsigned int flexible_columns = 0; + int min = 0, max = 0, fixed_width = 0, extra; + + if (cell->columns == 1) + continue; + + layout_minmax_block(cell, font_func, content); + i = cell->start_column; + + /* find min width so far of spanned columns, and count + * number of non-fixed spanned columns and total fixed width */ + for (j = 0; j != cell->columns; j++) { + min += col[i + j].min; + if (col[i + j].type == COLUMN_WIDTH_FIXED) + fixed_width += col[i + j].width; + else + flexible_columns++; + } + min += (cell->columns - 1) * border_spacing_h; + + /* distribute extra min to spanned columns */ + if (min < cell->min_width) { + if (flexible_columns == 0) { + extra = 1 + (cell->min_width - min) / + cell->columns; + for (j = 0; j != cell->columns; j++) { + col[i + j].min += extra; + if (col[i + j].max < col[i + j].min) + col[i + j].max = col[i + j].min; + } + } else { + extra = 1 + (cell->min_width - min) / + flexible_columns; + for (j = 0; j != cell->columns; j++) { + if (col[i + j].type != + COLUMN_WIDTH_FIXED) { + col[i + j].min += extra; + if (col[i + j].max < + col[i + j].min) + col[i + j].max = + col[i + j].min; + } + } + } + } + + /* find max width so far of spanned columns */ + for (j = 0; j != cell->columns; j++) + max += col[i + j].max; + max += (cell->columns - 1) * border_spacing_h; + + /* distribute extra max to spanned columns */ + if (max < cell->max_width && flexible_columns) { + extra = 1 + (cell->max_width - max) / flexible_columns; + for (j = 0; j != cell->columns; j++) + if (col[i + j].type != COLUMN_WIDTH_FIXED) + col[i + j].max += extra; } } + + for (i = 0; i != table->columns; i++) { + if (col[i].max < col[i].min) { + box_dump(stderr, table, 0, true); + assert(0); + } + table_min += col[i].min; + table_max += col[i].max; + } + + /* fixed width takes priority, unless it is too narrow */ + wtype = css_computed_width(table->style, &value, &unit); + if (wtype == CSS_WIDTH_SET && unit != CSS_UNIT_PCT) { + int width = FIXTOINT(nscss_len2px(&content->len_ctx, + value, unit, table->style)); + if (table_min < width) + table_min = width; + if (table_max < width) + table_max = width; + } + + /* add margins, border, padding to min, max widths */ + calculate_mbp_width(&content->len_ctx, + table->style, LEFT, true, true, true, + &extra_fixed, &extra_frac); + calculate_mbp_width(&content->len_ctx, + table->style, RIGHT, true, true, true, + &extra_fixed, &extra_frac); + if (extra_fixed < 0) + extra_fixed = 0; + if (extra_frac < 0) + extra_frac = 0; + if (1.0 <= extra_frac) + extra_frac = 0.9; + table->min_width = (table_min + extra_fixed) / (1.0 - extra_frac); + table->max_width = (table_max + extra_fixed) / (1.0 - extra_frac); + table->min_width += (table->columns + 1) * border_spacing_h; + table->max_width += (table->columns + 1) * border_spacing_h; + + assert(0 <= table->min_width && table->min_width <= table->max_width); } @@ -303,7 +522,8 @@ layout_minmax_line(struct box *first, int *line_max, bool first_line, bool *line_has_height, - const struct gui_layout_table *font_func) + const struct gui_layout_table *font_func, + const html_content *content) { int min = 0, max = 0, width, height, fixed; float frac; @@ -349,9 +569,11 @@ layout_minmax_line(struct box *first, if (b->type == BOX_FLOAT_LEFT || b->type == BOX_FLOAT_RIGHT) { assert(b->children); if (b->children->type == BOX_BLOCK) - layout_minmax_block(b->children, font_func); + layout_minmax_block(b->children, font_func, + content); else - layout_minmax_table(b->children, font_func); + layout_minmax_table(b->children, font_func, + content); b->min_width = b->children->min_width; b->max_width = b->children->max_width; if (min < b->min_width) @@ -361,7 +583,7 @@ layout_minmax_line(struct box *first, } if (b->type == BOX_INLINE_BLOCK) { - layout_minmax_block(b, font_func); + layout_minmax_block(b, font_func, content); if (min < b->min_width) min = b->min_width; max += b->max_width; @@ -372,16 +594,18 @@ layout_minmax_line(struct box *first, } assert(b->style); - font_plot_style_from_css(b->style, &fstyle); + font_plot_style_from_css(&content->len_ctx, b->style, &fstyle); if (b->type == BOX_INLINE && !b->object && !(b->flags & REPLACE_DIM) && !(b->flags & IFRAME)) { fixed = frac = 0; - calculate_mbp_width(b->style, LEFT, true, true, true, + calculate_mbp_width(&content->len_ctx, + b->style, LEFT, true, true, true, &fixed, &frac); if (!b->inline_end) - calculate_mbp_width(b->style, RIGHT, + calculate_mbp_width(&content->len_ctx, + b->style, RIGHT, true, true, true, &fixed, &frac); if (0 < fixed) @@ -390,7 +614,8 @@ layout_minmax_line(struct box *first, /* \todo update min width, consider fractional extra */ } else if (b->type == BOX_INLINE_END) { fixed = frac = 0; - calculate_mbp_width(b->inline_end->style, RIGHT, + calculate_mbp_width(&content->len_ctx, + b->inline_end->style, RIGHT, true, true, true, &fixed, &frac); if (0 < fixed) @@ -511,15 +736,17 @@ layout_minmax_line(struct box *first, width = AUTO; } else { - width = FIXTOINT(nscss_len2px(value, unit, - b->style)); + width = FIXTOINT(nscss_len2px(&content->len_ctx, + value, unit, b->style)); if (bs == CSS_BOX_SIZING_BORDER_BOX) { fixed = frac = 0; - calculate_mbp_width(block->style, LEFT, + calculate_mbp_width(&content->len_ctx, + block->style, LEFT, false, true, true, &fixed, &frac); - calculate_mbp_width(block->style, RIGHT, + calculate_mbp_width(&content->len_ctx, + block->style, RIGHT, false, true, true, &fixed, &frac); if (width < fixed) { @@ -536,7 +763,8 @@ layout_minmax_line(struct box *first, /* height */ htype = css_computed_height(b->style, &value, &unit); if (htype == CSS_HEIGHT_SET) { - height = FIXTOINT(nscss_len2px(value, unit, b->style)); + height = FIXTOINT(nscss_len2px(&content->len_ctx, + value, unit, b->style)); } else { height = AUTO; } @@ -552,17 +780,21 @@ layout_minmax_line(struct box *first, fixed = frac = 0; if (bs == CSS_BOX_SIZING_BORDER_BOX) { - calculate_mbp_width(b->style, LEFT, + calculate_mbp_width(&content->len_ctx, + b->style, LEFT, true, false, false, &fixed, &frac); - calculate_mbp_width(b->style, RIGHT, + calculate_mbp_width(&content->len_ctx, + b->style, RIGHT, true, false, false, &fixed, &frac); } else { - calculate_mbp_width(b->style, LEFT, + calculate_mbp_width(&content->len_ctx, + b->style, LEFT, true, true, true, &fixed, &frac); - calculate_mbp_width(b->style, RIGHT, + calculate_mbp_width(&content->len_ctx, + b->style, RIGHT, true, true, true, &fixed, &frac); } @@ -575,17 +807,21 @@ layout_minmax_line(struct box *first, fixed = frac = 0; if (bs == CSS_BOX_SIZING_BORDER_BOX) { - calculate_mbp_width(b->style, LEFT, + calculate_mbp_width(&content->len_ctx, + b->style, LEFT, true, false, false, &fixed, &frac); - calculate_mbp_width(b->style, RIGHT, + calculate_mbp_width(&content->len_ctx, + b->style, RIGHT, true, false, false, &fixed, &frac); } else { - calculate_mbp_width(b->style, LEFT, + calculate_mbp_width(&content->len_ctx, + b->style, LEFT, true, true, true, &fixed, &frac); - calculate_mbp_width(b->style, RIGHT, + calculate_mbp_width(&content->len_ctx, + b->style, RIGHT, true, true, true, &fixed, &frac); } @@ -596,8 +832,10 @@ layout_minmax_line(struct box *first, } else { /* form control with no object */ if (width == AUTO) - width = FIXTOINT(nscss_len2px(INTTOFIX(1), - CSS_UNIT_EM, b->style)); + width = FIXTOINT(nscss_len2px( + &content->len_ctx, + INTTOFIX(1), CSS_UNIT_EM, + b->style)); } if (min < width) @@ -610,7 +848,7 @@ layout_minmax_line(struct box *first, if (first_line) { /* todo: handle percentage values properly */ /* todo: handle text-indent interaction with floats */ - int text_indent = layout_text_indent( + int text_indent = layout_text_indent(&content->len_ctx, first->parent->parent->style, 100); min = (min + text_indent < 0) ? 0 : min + text_indent; max = (max + text_indent < 0) ? 0 : max + text_indent; @@ -640,7 +878,8 @@ layout_minmax_line(struct box *first, static void layout_minmax_inline_container(struct box *inline_container, bool *has_height, - const struct gui_layout_table *font_func) + const struct gui_layout_table *font_func, + const html_content *content) { struct box *child; int line_min = 0, line_max = 0; @@ -658,7 +897,8 @@ layout_minmax_inline_container(struct box *inline_container, for (child = inline_container->children; child; ) { child = layout_minmax_line(child, &line_min, &line_max, - first_line, &line_has_height, font_func); + first_line, &line_has_height, font_func, + content); if (min < line_min) min = line_min; if (max < line_max) @@ -681,11 +921,14 @@ layout_minmax_inline_container(struct box *inline_container, * * \param block box of type BLOCK, INLINE_BLOCK, or TABLE_CELL * \param font_func font functions + * \param content The HTML content being layed out. * \post block->min_width and block->max_width filled in, * 0 <= block->min_width <= block->max_width */ -static void -layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) +static void layout_minmax_block( + struct box *block, + const struct gui_layout_table *font_func, + const html_content *content) { struct box *child; int min = 0, max = 0; @@ -738,7 +981,8 @@ layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) css_fixed size = INTTOFIX(10); css_unit unit = CSS_UNIT_EM; - min = max = FIXTOINT(nscss_len2px(size, unit, block->style)); + min = max = FIXTOINT(nscss_len2px(&content->len_ctx, + size, unit, block->style)); block->flags |= HAS_HEIGHT; } @@ -751,7 +995,8 @@ layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) /* form checkbox or radio button * if width is AUTO, set it to 1em */ - min = max = FIXTOINT(nscss_len2px(size, unit, block->style)); + min = max = FIXTOINT(nscss_len2px(&content->len_ctx, + size, unit, block->style)); block->flags |= HAS_HEIGHT; } @@ -759,7 +1004,7 @@ layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) if (block->object) { if (content_get_type(block->object) == CONTENT_HTML) { layout_minmax_block(html_get_box_tree(block->object), - font_func); + font_func, content); min = html_get_box_tree(block->object)->min_width; max = html_get_box_tree(block->object)->max_width; } else { @@ -776,7 +1021,8 @@ layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) for (child = block->children; child; child = child->next) { switch (child->type) { case BOX_BLOCK: - layout_minmax_block(child, font_func); + layout_minmax_block(child, font_func, + content); if (child->flags & HAS_HEIGHT) child_has_height = true; break; @@ -785,7 +1031,8 @@ layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) child->flags |= NEED_MIN; layout_minmax_inline_container(child, - &child_has_height, font_func); + &child_has_height, font_func, + content); if (child_has_height && child == child->parent->children) { @@ -793,7 +1040,8 @@ layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) } break; case BOX_TABLE: - layout_minmax_table(child, font_func); + layout_minmax_table(child, font_func, + content); /* todo: fix for zero height tables */ child_has_height = true; child->flags |= MAKE_HEIGHT; @@ -831,14 +1079,17 @@ layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) /* fixed width takes priority */ if (block->type != BOX_TABLE_CELL && wtype == CSS_WIDTH_SET && wunit != CSS_UNIT_PCT) { - min = max = FIXTOINT(nscss_len2px(width, wunit, block->style)); + min = max = FIXTOINT(nscss_len2px(&content->len_ctx, + width, wunit, block->style)); if (bs == CSS_BOX_SIZING_BORDER_BOX) { int border_box_fixed = 0; float border_box_frac = 0; - calculate_mbp_width(block->style, LEFT, + calculate_mbp_width(&content->len_ctx, + block->style, LEFT, false, true, true, &border_box_fixed, &border_box_frac); - calculate_mbp_width(block->style, RIGHT, + calculate_mbp_width(&content->len_ctx, + block->style, RIGHT, false, true, true, &border_box_fixed, &border_box_frac); if (min < border_box_fixed) { @@ -858,14 +1109,18 @@ layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) * and paddings are wrong. */ if (bs == CSS_BOX_SIZING_BORDER_BOX && wtype == CSS_WIDTH_SET) { /* Border and padding included in width, so just get margin */ - calculate_mbp_width(block->style, LEFT, true, false, false, + calculate_mbp_width(&content->len_ctx, + block->style, LEFT, true, false, false, &extra_fixed, &extra_frac); - calculate_mbp_width(block->style, RIGHT, true, false, false, + calculate_mbp_width(&content->len_ctx, + block->style, RIGHT, true, false, false, &extra_fixed, &extra_frac); } else { - calculate_mbp_width(block->style, LEFT, true, true, true, + calculate_mbp_width(&content->len_ctx, + block->style, LEFT, true, true, true, &extra_fixed, &extra_frac); - calculate_mbp_width(block->style, RIGHT, true, true, true, + calculate_mbp_width(&content->len_ctx, + block->style, RIGHT, true, true, true, &extra_fixed, &extra_frac); } if (extra_fixed < 0) @@ -895,6 +1150,7 @@ layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) * * This turns the specified dimension into a content-box dimension. * + * \param len_ctx Length conversion context * \param box gadget to adjust dimensions of * \param available_width width of containing block * \param setwidth set true if the dimension to be tweaked is a width, @@ -904,6 +1160,7 @@ layout_minmax_block(struct box *block, const struct gui_layout_table *font_func) * gadget properties. */ static void layout_handle_box_sizing( + const nscss_len_ctx *len_ctx, struct box *box, int available_width, bool setwidth, @@ -920,9 +1177,11 @@ static void layout_handle_box_sizing( int fixed = 0; float frac = 0; - calculate_mbp_width(box->style, setwidth ? LEFT : TOP, + calculate_mbp_width(len_ctx, box->style, + setwidth ? LEFT : TOP, false, true, true, &fixed, &frac); - calculate_mbp_width(box->style, setwidth ? RIGHT : BOTTOM, + calculate_mbp_width(len_ctx, box->style, + setwidth ? RIGHT : BOTTOM, false, true, true, &fixed, &frac); orig -= frac * available_width + fixed; *dimension = orig > 0 ? orig : 0; @@ -933,6 +1192,7 @@ static void layout_handle_box_sizing( /** * Calculate width, height, and thickness of margins, paddings, and borders. * + * \param len_ctx Length conversion context * \param available_width width of containing block * \param viewport_height height of viewport in pixels or -ve if unknown * \param box current box @@ -949,7 +1209,8 @@ static void layout_handle_box_sizing( * \param border filled with border widths, may be NULL */ static void -layout_find_dimensions(int available_width, +layout_find_dimensions(const nscss_len_ctx *len_ctx, + int available_width, int viewport_height, struct box *box, const css_computed_style *style, @@ -978,15 +1239,15 @@ layout_find_dimensions(int available_width, *width = FPCT_OF_INT_TOINT( value, available_width); } else { - *width = FIXTOINT(nscss_len2px(value, unit, - style)); + *width = FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); } } else { *width = AUTO; } if (*width != AUTO) { - layout_handle_box_sizing(box, available_width, + layout_handle_box_sizing(len_ctx, box, available_width, true, width); } } @@ -1066,15 +1327,15 @@ layout_find_dimensions(int available_width, *height = AUTO; } } else { - *height = FIXTOINT(nscss_len2px(value, unit, - style)); + *height = FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); } } else { *height = AUTO; } if (*height != AUTO) { - layout_handle_box_sizing(box, available_width, + layout_handle_box_sizing(len_ctx, box, available_width, false, height); } } @@ -1091,8 +1352,8 @@ layout_find_dimensions(int available_width, *max_width = FPCT_OF_INT_TOINT(value, available_width); } else { - *max_width = FIXTOINT(nscss_len2px(value, unit, - style)); + *max_width = FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); } } else { /* Inadmissible */ @@ -1100,7 +1361,7 @@ layout_find_dimensions(int available_width, } if (*max_width != -1) { - layout_handle_box_sizing(box, available_width, + layout_handle_box_sizing(len_ctx, box, available_width, true, max_width); } } @@ -1117,8 +1378,8 @@ layout_find_dimensions(int available_width, *min_width = FPCT_OF_INT_TOINT(value, available_width); } else { - *min_width = FIXTOINT(nscss_len2px(value, unit, - style)); + *min_width = FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); } } else { /* Inadmissible */ @@ -1126,7 +1387,7 @@ layout_find_dimensions(int available_width, } if (*min_width != 0) { - layout_handle_box_sizing(box, available_width, + layout_handle_box_sizing(len_ctx, box, available_width, true, min_width); } } @@ -1143,8 +1404,8 @@ layout_find_dimensions(int available_width, /* TODO: handle percentage */ *max_height = -1; } else { - *max_height = FIXTOINT(nscss_len2px(value, unit, - style)); + *max_height = FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); } } else { /* Inadmissible */ @@ -1164,8 +1425,8 @@ layout_find_dimensions(int available_width, /* TODO: handle percentage */ *min_height = 0; } else { - *min_height = FIXTOINT(nscss_len2px(value, unit, - style)); + *min_height = FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); } } else { /* Inadmissible */ @@ -1179,32 +1440,16 @@ layout_find_dimensions(int available_width, css_fixed value = 0; css_unit unit = CSS_UNIT_PX; - switch (i) { - case TOP: - type = css_computed_margin_top(style, - &value, &unit); - break; - case RIGHT: - type = css_computed_margin_right(style, - &value, &unit); - break; - case BOTTOM: - type = css_computed_margin_bottom(style, - &value, &unit); - break; - case LEFT: - type = css_computed_margin_left(style, - &value, &unit); - break; - } + type = margin_funcs[i](style, &value, &unit); if (type == CSS_MARGIN_SET) { if (unit == CSS_UNIT_PCT) { margin[i] = FPCT_OF_INT_TOINT(value, available_width); } else { - margin[i] = FIXTOINT(nscss_len2px(value, - unit, style)); + margin[i] = FIXTOINT(nscss_len2px( + len_ctx, + value, unit, style)); } } else { margin[i] = AUTO; @@ -1215,29 +1460,14 @@ layout_find_dimensions(int available_width, css_fixed value = 0; css_unit unit = CSS_UNIT_PX; - switch (i) { - case TOP: - css_computed_padding_top(style, &value, &unit); - break; - case RIGHT: - css_computed_padding_right(style, &value, - &unit); - break; - case BOTTOM: - css_computed_padding_bottom(style, &value, - &unit); - break; - case LEFT: - css_computed_padding_left(style, &value, &unit); - break; - } + padding_funcs[i](style, &value, &unit); if (unit == CSS_UNIT_PCT) { padding[i] = FPCT_OF_INT_TOINT(value, available_width); } else { - padding[i] = FIXTOINT(nscss_len2px(value, unit, - style)); + padding[i] = FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); } } @@ -1248,33 +1478,9 @@ layout_find_dimensions(int available_width, css_fixed value = 0; css_unit unit = CSS_UNIT_PX; - switch (i) { - case TOP: - css_computed_border_top_width(style, &value, - &unit); - bstyle = css_computed_border_top_style(style); - css_computed_border_top_color(style, &color); - break; - case RIGHT: - css_computed_border_right_width(style, &value, - &unit); - bstyle = css_computed_border_right_style(style); - css_computed_border_right_color(style, &color); - break; - case BOTTOM: - css_computed_border_bottom_width(style, &value, - &unit); - bstyle = css_computed_border_bottom_style( - style); - css_computed_border_bottom_color(style, &color); - break; - case LEFT: - css_computed_border_left_width(style, &value, - &unit); - bstyle = css_computed_border_left_style(style); - css_computed_border_left_color(style, &color); - break; - } + border_width_funcs[i](style, &value, &unit); + bstyle = border_style_funcs[i](style); + border_color_funcs[i](style, &color); border[i].style = bstyle; border[i].c = color; @@ -1284,8 +1490,8 @@ layout_find_dimensions(int available_width, /* spec unclear: following Mozilla */ border[i].width = 0; else - border[i].width = FIXTOINT(nscss_len2px(value, - unit, style)); + border[i].width = FIXTOINT(nscss_len2px(len_ctx, + value, unit, style)); /* Special case for border-collapse: make all borders * on table/table-row-group/table-row zero width. */ @@ -1303,6 +1509,7 @@ layout_find_dimensions(int available_width, /** * Find next block that current margin collapses to. * + * \param len_ctx Length conversion context * \param box box to start tree-order search from (top margin is included) * \param block box responsible for current block fromatting context * \param viewport_height height of viewport in px @@ -1311,7 +1518,8 @@ layout_find_dimensions(int available_width, * \return next box that current margin collapses to, or NULL if none. */ static struct box* -layout_next_margin_block(struct box *box, +layout_next_margin_block(const nscss_len_ctx *len_ctx, + struct box *box, struct box *block, int viewport_height, int *max_pos_margin, @@ -1330,7 +1538,8 @@ layout_next_margin_block(struct box *box, /* Get margins */ if (box->style) { - layout_find_dimensions(box->parent->width, + layout_find_dimensions(len_ctx, + box->parent->width, viewport_height, box, box->style, NULL, NULL, NULL, NULL, @@ -1404,7 +1613,8 @@ layout_next_margin_block(struct box *box, /* Get margins */ if (box->style) { - layout_find_dimensions(box->parent->width, + layout_find_dimensions(len_ctx, + box->parent->width, viewport_height, box, box->style, NULL, NULL, NULL, NULL, @@ -1640,6 +1850,7 @@ layout_solve_width(struct box *box, * Compute dimensions of box, margins, paddings, and borders for a block-level * element. * + * \param len_ctx Length conversion context * \param available_width Max width available in pixels * \param viewport_height Height of viewport in pixels or -ve if unknown * \param lm min left margin required to avoid floats in px. @@ -1652,7 +1863,8 @@ layout_solve_width(struct box *box, * See CSS 2.1 10.3.3, 10.3.4, 10.6.2, and 10.6.3. */ static void -layout_block_find_dimensions(int available_width, +layout_block_find_dimensions(const nscss_len_ctx *len_ctx, + int available_width, int viewport_height, int lm, int rm, @@ -1665,8 +1877,8 @@ layout_block_find_dimensions(int available_width, struct box_border *border = box->border; const css_computed_style *style = box->style; - layout_find_dimensions(available_width, viewport_height, box, style, - &width, &height, &max_width, &min_width, + layout_find_dimensions(len_ctx, available_width, viewport_height, box, + style, &width, &height, &max_width, &min_width, &max_height, &min_height, margin, padding, border); if (box->object && !(box->flags & REPLACE_DIM) && @@ -1819,8 +2031,9 @@ static bool layout_table(struct box *table, int available_width, memcpy(col, table->col, sizeof(col[0]) * columns); /* find margins, paddings, and borders for table and cells */ - layout_find_dimensions(available_width, -1, table, style, 0, 0, 0, 0, - 0, 0, table->margin, table->padding, table->border); + layout_find_dimensions(&content->len_ctx, available_width, -1, table, + style, 0, 0, 0, 0, 0, 0, table->margin, table->padding, + table->border); for (row_group = table->children; row_group; row_group = row_group->next) { for (row = row_group->children; row; row = row->next) { @@ -1829,9 +2042,11 @@ static bool layout_table(struct box *table, int available_width, enum css_overflow_e overflow_y; assert(c->style); - table_used_border_for_cell(c); - layout_find_dimensions(available_width, -1, - c, c->style, 0, 0, 0, 0, 0, 0, + table_used_border_for_cell( + &content->len_ctx, c); + layout_find_dimensions(&content->len_ctx, + available_width, -1, c, + c->style, 0, 0, 0, 0, 0, 0, 0, c->padding, c->border); overflow_x = css_computed_overflow_x(c->style); @@ -1859,8 +2074,10 @@ static bool layout_table(struct box *table, int available_width, css_computed_border_spacing(style, &h, &hu, &v, &vu); - border_spacing_h = FIXTOINT(nscss_len2px(h, hu, style)); - border_spacing_v = FIXTOINT(nscss_len2px(v, vu, style)); + border_spacing_h = FIXTOINT(nscss_len2px(&content->len_ctx, + h, hu, style)); + border_spacing_v = FIXTOINT(nscss_len2px(&content->len_ctx, + v, vu, style)); } /* find specified table width, or available width if auto-width */ @@ -1870,7 +2087,8 @@ static bool layout_table(struct box *table, int available_width, table_width = FPCT_OF_INT_TOINT(value, available_width); } else { table_width = - FIXTOINT(nscss_len2px(value, unit, style)); + FIXTOINT(nscss_len2px(&content->len_ctx, + value, unit, style)); } /* specified width includes border */ @@ -1948,7 +2166,8 @@ static bool layout_table(struct box *table, int available_width, } else { /* This is the minimum height for the table * (see 17.5.3) */ - min_height = FIXTOINT(nscss_len2px(value, unit, style)); + min_height = FIXTOINT(nscss_len2px(&content->len_ctx, + value, unit, style)); } } @@ -2138,8 +2357,9 @@ static bool layout_table(struct box *table, int available_width, htype = css_computed_height(row->style, &value, &unit); if (htype == CSS_HEIGHT_SET && unit != CSS_UNIT_PCT) { - row_height = FIXTOINT(nscss_len2px(value, unit, - row->style)); + row_height = FIXTOINT(nscss_len2px( + &content->len_ctx, + value, unit, row->style)); } for (c = row->children; c; c = c->next) { assert(c->style); @@ -2176,8 +2396,9 @@ static bool layout_table(struct box *table, int available_width, /* some sites use height="1" or similar * to attempt to make cells as small as * possible, so treat it as a minimum */ - int h = FIXTOINT(nscss_len2px(value, - unit, c->style)); + int h = FIXTOINT(nscss_len2px( + &content->len_ctx, + value, unit, c->style)); if (c->height < h) c->height = h; } @@ -2321,12 +2542,16 @@ static bool layout_table(struct box *table, int available_width, /** * Manimpulate box height according to CSS min-height and max-height properties * + * \param len_ctx CSS length conversion context for document. * \param box block to modify with any min-height or max-height * \param container containing block for absolutely positioned elements, or * NULL for non absolutely positioned elements. * \return whether the height has been changed */ -static bool layout_apply_minmax_height(struct box *box, struct box *container) +static bool layout_apply_minmax_height( + const nscss_len_ctx *len_ctx, + struct box *box, + struct box *container) { int h; struct box *containing_block = NULL; @@ -2385,8 +2610,8 @@ static bool layout_apply_minmax_height(struct box *box, struct box *container) } } } else { - h = FIXTOINT(nscss_len2px(value, unit, - box->style)); + h = FIXTOINT(nscss_len2px(len_ctx, + value, unit, box->style)); if (h < box->height) { box->height = h; updated = true; @@ -2415,8 +2640,8 @@ static bool layout_apply_minmax_height(struct box *box, struct box *container) } } } else { - h = FIXTOINT(nscss_len2px(value, unit, - box->style)); + h = FIXTOINT(nscss_len2px(len_ctx, + value, unit, box->style)); if (h > box->height) { box->height = h; updated = true; @@ -2459,6 +2684,1211 @@ static bool layout_block_object(struct box *block) /** + * Insert a float into a container. + * + * \param cont block formatting context block, used to contain float + * \param b box to add to float + * + * This sorts floats in order of descending bottom edges. + */ +static void add_float_to_container(struct box *cont, struct box *b) +{ + struct box *box = cont->float_children; + int b_bottom = b->y + b->height; + + assert(b->type == BOX_FLOAT_LEFT || b->type == BOX_FLOAT_RIGHT); + + if (box == NULL) { + /* No other float children */ + b->next_float = NULL; + cont->float_children = b; + return; + } else if (b_bottom >= box->y + box->height) { + /* Goes at start of list */ + b->next_float = cont->float_children; + cont->float_children = b; + } else { + struct box *prev = NULL; + while (box != NULL && b_bottom < box->y + box->height) { + prev = box; + box = box->next_float; + } + if (prev != NULL) { + b->next_float = prev->next_float; + prev->next_float = b; + } + } +} + + +/** + * Split a text box. + * + * \param content memory pool for any new boxes + * \param fstyle style for text in text box + * \param split_box box with text to split + * \param new_length new length for text in split_box, after splitting + * \param new_width new width for text in split_box, after splitting + * \return true on success, false on memory exhaustion + * + * A new box is created and inserted into the box tree after split_box, + * containing the text after new_length excluding the initial space character. + */ +static bool +layout_text_box_split(html_content *content, + plot_font_style_t *fstyle, + struct box *split_box, + size_t new_length, + int new_width) +{ + int space_width = split_box->space; + struct box *c2; + const struct gui_layout_table *font_func = content->font_func; + bool space = (split_box->text[new_length] == ' '); + int used_length = new_length + (space ? 1 : 0); + + if ((space && space_width == 0) || space_width == UNKNOWN_WIDTH) { + /* We're need to add a space, and we don't know how big + * it's to be, OR we have a space of unknown width anyway; + * Calculate space width */ + font_func->width(fstyle, " ", 1, &space_width); + } + + if (split_box->space == UNKNOWN_WIDTH) + split_box->space = space_width; + if (!space) + space_width = 0; + + /* Create clone of split_box, c2 */ + c2 = talloc_memdup(content->bctx, split_box, sizeof *c2); + if (!c2) + return false; + c2->flags |= CLONE; + + /* Set remaining text in c2 */ + c2->text += used_length; + + /* Set c2 according to the remaining text */ + c2->width -= new_width + space_width; + c2->flags &= ~MEASURED; /* width has been estimated */ + c2->length = split_box->length - used_length; + + /* Update split_box for its reduced text */ + split_box->width = new_width; + split_box->flags |= MEASURED; + split_box->length = new_length; + split_box->space = space_width; + + /* Insert c2 into box list */ + c2->next = split_box->next; + split_box->next = c2; + c2->prev = split_box; + if (c2->next) + c2->next->prev = c2; + else + c2->parent->last = c2; + + NSLOG(layout, DEBUG, + "split_box %p len: %" PRIsizet " \"%.*s\"", + split_box, + split_box->length, + (int)split_box->length, + split_box->text); + NSLOG(layout, DEBUG, + " new_box %p len: %" PRIsizet " \"%.*s\"", + c2, + c2->length, + (int)c2->length, + c2->text); + + return true; +} + + +/** + * Compute dimensions of box, margins, paddings, and borders for a floating + * element using shrink-to-fit. Also used for inline-blocks. + * + * \param len_ctx CSS length conversion context for document. + * \param available_width Max width available in pixels + * \param style Box's style + * \param box Box for which to find dimensions + * Box margins, borders, paddings, width and + * height are updated. + */ +static void +layout_float_find_dimensions( + const nscss_len_ctx *len_ctx, + int available_width, + const css_computed_style *style, + struct box *box) +{ + int width, height, max_width, min_width, max_height, min_height; + int *margin = box->margin; + int *padding = box->padding; + struct box_border *border = box->border; + enum css_overflow_e overflow_x = css_computed_overflow_x(style); + enum css_overflow_e overflow_y = css_computed_overflow_y(style); + int scrollbar_width_x = + (overflow_x == CSS_OVERFLOW_SCROLL || + overflow_x == CSS_OVERFLOW_AUTO) ? + SCROLLBAR_WIDTH : 0; + int scrollbar_width_y = + (overflow_y == CSS_OVERFLOW_SCROLL || + overflow_y == CSS_OVERFLOW_AUTO) ? + SCROLLBAR_WIDTH : 0; + + layout_find_dimensions(len_ctx, available_width, -1, box, style, + &width, &height, &max_width, &min_width, + &max_height, &min_height, margin, padding, border); + + if (margin[LEFT] == AUTO) + margin[LEFT] = 0; + if (margin[RIGHT] == AUTO) + margin[RIGHT] = 0; + + if (box->gadget == NULL) { + padding[RIGHT] += scrollbar_width_y; + padding[BOTTOM] += scrollbar_width_x; + } + + if (box->object && !(box->flags & REPLACE_DIM) && + content_get_type(box->object) != CONTENT_HTML) { + /* Floating replaced element, with intrinsic width or height. + * See 10.3.6 and 10.6.2 */ + layout_get_object_dimensions(box, &width, &height, + min_width, max_width, min_height, max_height); + } else if (box->gadget && (box->gadget->type == GADGET_TEXTBOX || + box->gadget->type == GADGET_PASSWORD || + box->gadget->type == GADGET_FILE || + box->gadget->type == GADGET_TEXTAREA)) { + css_fixed size = 0; + css_unit unit = CSS_UNIT_EM; + + /* Give sensible dimensions to gadgets, with auto width/height, + * that don't shrink to fit contained text. */ + assert(box->style); + + if (box->gadget->type == GADGET_TEXTBOX || + box->gadget->type == GADGET_PASSWORD || + box->gadget->type == GADGET_FILE) { + if (width == AUTO) { + size = INTTOFIX(10); + width = FIXTOINT(nscss_len2px(len_ctx, + size, unit, box->style)); + } + if (box->gadget->type == GADGET_FILE && + height == AUTO) { + size = FLTTOFIX(1.5); + height = FIXTOINT(nscss_len2px(len_ctx, + size, unit, box->style)); + } + } + if (box->gadget->type == GADGET_TEXTAREA) { + if (width == AUTO) { + size = INTTOFIX(10); + width = FIXTOINT(nscss_len2px(len_ctx, + size, unit, box->style)); + } + if (height == AUTO) { + size = INTTOFIX(4); + height = FIXTOINT(nscss_len2px(len_ctx, + size, unit, box->style)); + } + } + } else if (width == AUTO) { + /* CSS 2.1 section 10.3.5 */ + width = min(max(box->min_width, available_width), + box->max_width); + + /* width includes margin, borders and padding */ + if (width == available_width) { + width -= box->margin[LEFT] + box->border[LEFT].width + + box->padding[LEFT] + + box->padding[RIGHT] + + box->border[RIGHT].width + + box->margin[RIGHT]; + } else { + /* width was obtained from a min_width or max_width + * value, so need to use the same method for calculating + * mbp as was used in layout_minmax_block() */ + int fixed = 0; + float frac = 0; + calculate_mbp_width(len_ctx, box->style, LEFT, + true, true, true, &fixed, &frac); + calculate_mbp_width(len_ctx, box->style, RIGHT, + true, true, true, &fixed, &frac); + if (fixed < 0) + fixed = 0; + + width -= fixed; + } + + if (max_width >= 0 && width > max_width) width = max_width; + if (min_width > 0 && width < min_width) width = min_width; + + } else { + if (max_width >= 0 && width > max_width) width = max_width; + if (min_width > 0 && width < min_width) width = min_width; + width -= scrollbar_width_y; + } + + box->width = width; + box->height = height; + + if (margin[TOP] == AUTO) + margin[TOP] = 0; + if (margin[BOTTOM] == AUTO) + margin[BOTTOM] = 0; +} + + +/** + * Layout the contents of a float or inline block. + * + * \param b float or inline block box + * \param width available width + * \param content memory pool for any new boxes + * \return true on success, false on memory exhaustion + */ +static bool layout_float(struct box *b, int width, html_content *content) +{ + assert(b->type == BOX_TABLE || b->type == BOX_BLOCK || + b->type == BOX_INLINE_BLOCK); + layout_float_find_dimensions(&content->len_ctx, width, b->style, b); + if (b->type == BOX_TABLE) { + if (!layout_table(b, width, content)) + return false; + if (b->margin[LEFT] == AUTO) + b->margin[LEFT] = 0; + if (b->margin[RIGHT] == AUTO) + b->margin[RIGHT] = 0; + if (b->margin[TOP] == AUTO) + b->margin[TOP] = 0; + if (b->margin[BOTTOM] == AUTO) + b->margin[BOTTOM] = 0; + } else + return layout_block_context(b, -1, content); + return true; +} + + +/** + * Position a float in the first available space. + * + * \param c float box to position + * \param width available width + * \param cx x coordinate relative to cont to place float right of + * \param y y coordinate relative to cont to place float below + * \param cont ancestor box which defines horizontal space, for floats + */ +static void +place_float_below(struct box *c, int width, int cx, int y, struct box *cont) +{ + int x0, x1, yy; + struct box *left; + struct box *right; + + yy = y > cont->cached_place_below_level ? + y : cont->cached_place_below_level; + + NSLOG(layout, DEBUG, + "c %p, width %i, cx %i, y %i, cont %p", c, + width, cx, y, cont); + + do { + y = yy; + x0 = cx; + x1 = cx + width; + find_sides(cont->float_children, y, y + c->height, &x0, &x1, + &left, &right); + if (left != 0 && right != 0) { + yy = (left->y + left->height < + right->y + right->height ? + left->y + left->height : + right->y + right->height); + } else if (left == 0 && right != 0) { + yy = right->y + right->height; + } else if (left != 0 && right == 0) { + yy = left->y + left->height; + } + } while ((left != 0 || right != 0) && (c->width > x1 - x0)); + + if (c->type == BOX_FLOAT_LEFT) { + c->x = x0; + } else { + c->x = x1 - c->width; + } + c->y = y; + cont->cached_place_below_level = y; +} + + +/** + * Calculate line height from a style. + */ +static int line_height( + const nscss_len_ctx *len_ctx, + const css_computed_style *style) +{ + enum css_line_height_e lhtype; + css_fixed lhvalue = 0; + css_unit lhunit = CSS_UNIT_PX; + css_fixed line_height; + + assert(style); + + lhtype = css_computed_line_height(style, &lhvalue, &lhunit); + if (lhtype == CSS_LINE_HEIGHT_NORMAL) { + /* Normal => use a constant of 1.3 * font-size */ + lhvalue = FLTTOFIX(1.3); + lhtype = CSS_LINE_HEIGHT_NUMBER; + } + + if (lhtype == CSS_LINE_HEIGHT_NUMBER || + lhunit == CSS_UNIT_PCT) { + line_height = nscss_len2px(len_ctx, + lhvalue, CSS_UNIT_EM, style); + + if (lhtype != CSS_LINE_HEIGHT_NUMBER) + line_height = FDIV(line_height, F_100); + } else { + assert(lhunit != CSS_UNIT_PCT); + + line_height = nscss_len2px(len_ctx, + lhvalue, lhunit, style); + } + + return FIXTOINT(line_height); +} + + +/** + * Position a line of boxes in inline formatting context. + * + * \param first box at start of line + * \param width available width on input, updated with actual width on output + * (may be incorrect if the line gets split?) + * \param y coordinate of top of line, updated on exit to bottom + * \param cx coordinate of left of line relative to cont + * \param cy coordinate of top of line relative to cont + * \param cont ancestor box which defines horizontal space, for floats + * \param indent apply any first-line indent + * \param has_text_children at least one TEXT in the inline_container + * \param next_box updated to first box for next line, or 0 at end + * \param content memory pool for any new boxes + * \return true on success, false on memory exhaustion + */ +static bool +layout_line(struct box *first, + int *width, + int *y, + int cx, + int cy, + struct box *cont, + bool indent, + bool has_text_children, + html_content *content, + struct box **next_box) +{ + int height, used_height; + int x0 = 0; + int x1 = *width; + int x, h, x_previous; + int fy = cy; + struct box *left; + struct box *right; + struct box *b; + struct box *split_box = 0; + struct box *d; + struct box *br_box = 0; + bool move_y = false; + bool place_below = false; + int space_before = 0, space_after = 0; + unsigned int inline_count = 0; + unsigned int i; + const struct gui_layout_table *font_func = content->font_func; + plot_font_style_t fstyle; + + NSLOG(layout, DEBUG, + "first %p, first->text '%.*s', width %i, y %i, cx %i, cy %i", + first, + (int)first->length, + first->text, + *width, + *y, + cx, + cy); + + /* find sides at top of line */ + x0 += cx; + x1 += cx; + find_sides(cont->float_children, cy, cy, &x0, &x1, &left, &right); + x0 -= cx; + x1 -= cx; + + if (indent) + x0 += layout_text_indent(&content->len_ctx, + first->parent->parent->style, *width); + + if (x1 < x0) + x1 = x0; + + /* get minimum line height from containing block. + * this is the line-height if there are text children and also in the + * case of an initially empty text input */ + if (has_text_children || first->parent->parent->gadget) + used_height = height = line_height(&content->len_ctx, + first->parent->parent->style); + else + /* inline containers with no text are usually for layout and + * look better with no minimum line-height */ + used_height = height = 0; + + /* pass 1: find height of line assuming sides at top of line: loop + * body executed at least once + * keep in sync with the loop in layout_minmax_line() */ + + NSLOG(layout, DEBUG, "x0 %i, x1 %i, x1 - x0 %i", x0, x1, x1 - x0); + + + for (x = 0, b = first; x <= x1 - x0 && b != 0; b = b->next) { + int min_width, max_width, min_height, max_height; + + assert(b->type == BOX_INLINE || b->type == BOX_INLINE_BLOCK || + b->type == BOX_FLOAT_LEFT || + b->type == BOX_FLOAT_RIGHT || + b->type == BOX_BR || b->type == BOX_TEXT || + b->type == BOX_INLINE_END); + + + NSLOG(layout, DEBUG, "pass 1: b %p, x %i", b, x); + + + if (b->type == BOX_BR) + break; + + if (b->type == BOX_FLOAT_LEFT || b->type == BOX_FLOAT_RIGHT) + continue; + if (b->type == BOX_INLINE_BLOCK && + (css_computed_position(b->style) == + CSS_POSITION_ABSOLUTE || + css_computed_position(b->style) == + CSS_POSITION_FIXED)) + continue; + + assert(b->style != NULL); + font_plot_style_from_css(&content->len_ctx, b->style, &fstyle); + + x += space_after; + + if (b->type == BOX_INLINE_BLOCK) { + if (b->max_width != UNKNOWN_WIDTH) + if (!layout_float(b, *width, content)) + return false; + h = b->border[TOP].width + b->padding[TOP] + b->height + + b->padding[BOTTOM] + + b->border[BOTTOM].width; + if (height < h) + height = h; + x += b->margin[LEFT] + b->border[LEFT].width + + b->padding[LEFT] + b->width + + b->padding[RIGHT] + + b->border[RIGHT].width + + b->margin[RIGHT]; + space_after = 0; + continue; + } + + if (b->type == BOX_INLINE) { + /* calculate borders, margins, and padding */ + layout_find_dimensions(&content->len_ctx, + *width, -1, b, b->style, 0, 0, 0, 0, + 0, 0, b->margin, b->padding, b->border); + for (i = 0; i != 4; i++) + if (b->margin[i] == AUTO) + b->margin[i] = 0; + x += b->margin[LEFT] + b->border[LEFT].width + + b->padding[LEFT]; + if (b->inline_end) { + b->inline_end->margin[RIGHT] = b->margin[RIGHT]; + b->inline_end->padding[RIGHT] = + b->padding[RIGHT]; + b->inline_end->border[RIGHT] = + b->border[RIGHT]; + } else { + x += b->padding[RIGHT] + + b->border[RIGHT].width + + b->margin[RIGHT]; + } + } else if (b->type == BOX_INLINE_END) { + b->width = 0; + if (b->space == UNKNOWN_WIDTH) { + font_func->width(&fstyle, " ", 1, &b->space); + /** \todo handle errors */ + } + space_after = b->space; + + x += b->padding[RIGHT] + b->border[RIGHT].width + + b->margin[RIGHT]; + continue; + } + + if (!b->object && !(b->flags & IFRAME) && !b->gadget && + !(b->flags & REPLACE_DIM)) { + /* inline non-replaced, 10.3.1 and 10.6.1 */ + b->height = line_height(&content->len_ctx, + b->style ? b->style : + b->parent->parent->style); + if (height < b->height) + height = b->height; + + if (!b->text) { + b->width = 0; + space_after = 0; + continue; + } + + if (b->width == UNKNOWN_WIDTH) { + /** \todo handle errors */ + + /* If it's a select element, we must use the + * width of the widest option text */ + if (b->parent->parent->gadget && + b->parent->parent->gadget->type + == GADGET_SELECT) { + int opt_maxwidth = 0; + struct form_option *o; + + for (o = b->parent->parent->gadget-> + data.select.items; o; + o = o->next) { + int opt_width; + font_func->width(&fstyle, + o->text, + strlen(o->text), + &opt_width); + + if (opt_maxwidth < opt_width) + opt_maxwidth =opt_width; + } + b->width = opt_maxwidth; + if (nsoption_bool(core_select_menu)) + b->width += SCROLLBAR_WIDTH; + } else { + font_func->width(&fstyle, b->text, + b->length, &b->width); + b->flags |= MEASURED; + } + } + + /* If the current text has not been measured (i.e. its + * width was estimated after splitting), and it fits on + * the line, measure it properly, so next box is placed + * correctly. */ + if (b->text && (x + b->width < x1 - x0) && + !(b->flags & MEASURED) && + b->next) { + font_func->width(&fstyle, b->text, + b->length, &b->width); + b->flags |= MEASURED; + } + + x += b->width; + if (b->space == UNKNOWN_WIDTH) { + font_func->width(&fstyle, " ", 1, &b->space); + /** \todo handle errors */ + } + space_after = b->space; + continue; + } + + space_after = 0; + + /* inline replaced, 10.3.2 and 10.6.2 */ + assert(b->style); + + layout_find_dimensions(&content->len_ctx, + *width, -1, b, b->style, + &b->width, &b->height, + &max_width, &min_width, + &max_height, &min_height, + NULL, NULL, NULL); + + if (b->object && !(b->flags & REPLACE_DIM)) { + layout_get_object_dimensions(b, &b->width, &b->height, + min_width, max_width, + min_height, max_height); + } else if (b->flags & IFRAME) { + /* TODO: should we look at the content dimensions? */ + if (b->width == AUTO) + b->width = 400; + if (b->height == AUTO) + b->height = 300; + + /* We reformat the iframe browser window to new + * dimensions in pass 2 */ + } else { + /* form control with no object */ + if (b->width == AUTO) + b->width = FIXTOINT(nscss_len2px( + &content->len_ctx, INTTOFIX(1), + CSS_UNIT_EM, b->style)); + if (b->height == AUTO) + b->height = FIXTOINT(nscss_len2px( + &content->len_ctx, INTTOFIX(1), + CSS_UNIT_EM, b->style)); + } + + /* Reformat object to new box size */ + if (b->object && content_get_type(b->object) == CONTENT_HTML && + b->width != + content_get_available_width(b->object)) { + css_fixed value = 0; + css_unit unit = CSS_UNIT_PX; + enum css_height_e htype = css_computed_height(b->style, + &value, &unit); + + content_reformat(b->object, false, b->width, b->height); + + if (htype == CSS_HEIGHT_AUTO) + b->height = content_get_height(b->object); + } + + if (height < b->height) + height = b->height; + + x += b->width; + } + + /* find new sides using this height */ + x0 = cx; + x1 = cx + *width; + find_sides(cont->float_children, cy, cy + height, &x0, &x1, + &left, &right); + x0 -= cx; + x1 -= cx; + + if (indent) + x0 += layout_text_indent(&content->len_ctx, + first->parent->parent->style, *width); + + if (x1 < x0) + x1 = x0; + + space_after = space_before = 0; + + /* pass 2: place boxes in line: loop body executed at least once */ + + NSLOG(layout, DEBUG, "x0 %i, x1 %i, x1 - x0 %i", x0, x1, x1 - x0); + + for (x = x_previous = 0, b = first; x <= x1 - x0 && b; b = b->next) { + + NSLOG(layout, DEBUG, "pass 2: b %p, x %i", b, x); + + if (b->type == BOX_INLINE_BLOCK && + (css_computed_position(b->style) == + CSS_POSITION_ABSOLUTE || + css_computed_position(b->style) == + CSS_POSITION_FIXED)) { + b->x = x + space_after; + + } else if (b->type == BOX_INLINE || + b->type == BOX_INLINE_BLOCK || + b->type == BOX_TEXT || + b->type == BOX_INLINE_END) { + assert(b->width != UNKNOWN_WIDTH); + + x_previous = x; + x += space_after; + b->x = x; + + if ((b->type == BOX_INLINE && !b->inline_end) || + b->type == BOX_INLINE_BLOCK) { + b->x += b->margin[LEFT] + b->border[LEFT].width; + x = b->x + b->padding[LEFT] + b->width + + b->padding[RIGHT] + + b->border[RIGHT].width + + b->margin[RIGHT]; + } else if (b->type == BOX_INLINE) { + b->x += b->margin[LEFT] + b->border[LEFT].width; + x = b->x + b->padding[LEFT] + b->width; + } else if (b->type == BOX_INLINE_END) { + b->height = b->inline_end->height; + x += b->padding[RIGHT] + + b->border[RIGHT].width + + b->margin[RIGHT]; + } else { + x += b->width; + } + + space_before = space_after; + if (b->object || b->flags & REPLACE_DIM || + b->flags & IFRAME) + space_after = 0; + else if (b->text || b->type == BOX_INLINE_END) { + if (b->space == UNKNOWN_WIDTH) { + font_plot_style_from_css( + &content->len_ctx, + b->style, &fstyle); + /** \todo handle errors */ + font_func->width(&fstyle, " ", 1, + &b->space); + } + space_after = b->space; + } else { + space_after = 0; + } + split_box = b; + move_y = true; + inline_count++; + } else if (b->type == BOX_BR) { + b->x = x; + b->width = 0; + br_box = b; + b = b->next; + split_box = 0; + move_y = true; + break; + + } else { + /* float */ + NSLOG(layout, DEBUG, "float %p", b); + + d = b->children; + d->float_children = 0; + d->cached_place_below_level = 0; + b->float_container = d->float_container = cont; + + if (!layout_float(d, *width, content)) + return false; + + NSLOG(layout, DEBUG, + "%p : %d %d", + d, + d->margin[TOP], + d->border[TOP].width); + + d->x = d->margin[LEFT] + d->border[LEFT].width; + d->y = d->margin[TOP] + d->border[TOP].width; + b->width = d->margin[LEFT] + d->border[LEFT].width + + d->padding[LEFT] + d->width + + d->padding[RIGHT] + + d->border[RIGHT].width + + d->margin[RIGHT]; + b->height = d->margin[TOP] + d->border[TOP].width + + d->padding[TOP] + d->height + + d->padding[BOTTOM] + + d->border[BOTTOM].width + + d->margin[BOTTOM]; + + if (b->width > (x1 - x0) - x) + place_below = true; + if (d->style && (css_computed_clear(d->style) == + CSS_CLEAR_NONE || + (css_computed_clear(d->style) == + CSS_CLEAR_LEFT && left == 0) || + (css_computed_clear(d->style) == + CSS_CLEAR_RIGHT && + right == 0) || + (css_computed_clear(d->style) == + CSS_CLEAR_BOTH && + left == 0 && right == 0)) && + (!place_below || + (left == 0 && right == 0 && x == 0)) && + cy >= cont->clear_level && + cy >= cont->cached_place_below_level) { + /* + not cleared or, + * cleared and there are no floats to clear + * + fits without needing to be placed below or, + * this line is empty with no floats + * + current y, cy, is below the clear level + * + * Float affects current line */ + if (b->type == BOX_FLOAT_LEFT) { + b->x = cx + x0; + if (b->width > 0) + x0 += b->width; + left = b; + } else { + b->x = cx + x1 - b->width; + if (b->width > 0) + x1 -= b->width; + right = b; + } + b->y = cy; + } else { + /* cleared or doesn't fit on line */ + /* place below into next available space */ + int fcy = (cy > cont->clear_level) ? cy : + cont->clear_level; + fcy = (fcy > cont->cached_place_below_level) ? + fcy : + cont->cached_place_below_level; + fy = (fy > fcy) ? fy : fcy; + fy = (fy == cy) ? fy + height : fy; + + place_float_below(b, *width, cx, fy, cont); + fy = b->y; + if (d->style && ( + (css_computed_clear(d->style) == + CSS_CLEAR_LEFT && left != 0) || + (css_computed_clear(d->style) == + CSS_CLEAR_RIGHT && + right != 0) || + (css_computed_clear(d->style) == + CSS_CLEAR_BOTH && + (left != 0 || right != 0)))) { + /* to be cleared below existing + * floats */ + if (b->type == BOX_FLOAT_LEFT) + b->x = cx; + else + b->x = cx + *width - b->width; + + fcy = layout_clear(cont->float_children, + css_computed_clear(d->style)); + if (fcy > cont->clear_level) + cont->clear_level = fcy; + if (b->y < fcy) + b->y = fcy; + } + if (b->type == BOX_FLOAT_LEFT) + left = b; + else + right = b; + } + add_float_to_container(cont, b); + + split_box = 0; + } + } + + if (x1 - x0 < x && split_box) { + /* the last box went over the end */ + size_t split = 0; + int w; + bool no_wrap = css_computed_white_space( + split_box->style) == CSS_WHITE_SPACE_NOWRAP || + css_computed_white_space( + split_box->style) == CSS_WHITE_SPACE_PRE; + + x = x_previous; + + if (!no_wrap && + (split_box->type == BOX_INLINE || + split_box->type == BOX_TEXT) && + !split_box->object && + !(split_box->flags & REPLACE_DIM) && + !(split_box->flags & IFRAME) && + !split_box->gadget && split_box->text) { + + font_plot_style_from_css(&content->len_ctx, + split_box->style, &fstyle); + /** \todo handle errors */ + font_func->split(&fstyle, + split_box->text, + split_box->length, + x1 - x0 - x - space_before, + &split, + &w); + } + + /* split == 0 implies that text can't be split */ + + if (split == 0) + w = split_box->width; + + + NSLOG(layout, DEBUG, + "splitting: split_box %p \"%.*s\", spilt %zu, w %i, " + "left %p, right %p, inline_count %u", + split_box, + (int)split_box->length, + split_box->text, + split, + w, + left, + right, + inline_count); + + if ((split == 0 || x1 - x0 <= x + space_before + w) && + !left && !right && inline_count == 1) { + /* first word of box doesn't fit, but no floats and + * first box on line so force in */ + if (split == 0 || split == split_box->length) { + /* only one word in this box, or not text + * or white-space:nowrap */ + b = split_box->next; + } else { + /* cut off first word for this line */ + if (!layout_text_box_split(content, &fstyle, + split_box, split, w)) + return false; + b = split_box->next; + } + x += space_before + w; + + NSLOG(layout, DEBUG, "forcing"); + + } else if ((split == 0 || x1 - x0 <= x + space_before + w) && + inline_count == 1) { + /* first word of first box doesn't fit, but a float is + * taking some of the width so move below it */ + assert(left || right); + used_height = 0; + if (left) { + + NSLOG(layout, DEBUG, + "cy %i, left->y %i, left->height %i", + cy, + left->y, + left->height); + + used_height = left->y + left->height - cy + 1; + + NSLOG(layout, DEBUG, "used_height %i", + used_height); + + } + if (right && used_height < + right->y + right->height - cy + 1) + used_height = right->y + right->height - cy + 1; + + if (used_height < 0) + used_height = 0; + + b = split_box; + + NSLOG(layout, DEBUG, "moving below float"); + + } else if (split == 0 || x1 - x0 <= x + space_before + w) { + /* first word of box doesn't fit so leave box for next + * line */ + b = split_box; + + NSLOG(layout, DEBUG, "leaving for next line"); + + } else { + /* fit as many words as possible */ + assert(split != 0); + + NSLOG(layout, DEBUG, "'%.*s' %i %zu %i", + (int)split_box->length, split_box->text, + x1 - x0, split, w); + + if (split != split_box->length) { + if (!layout_text_box_split(content, &fstyle, + split_box, split, w)) + return false; + b = split_box->next; + } + x += space_before + w; + + NSLOG(layout, DEBUG, "fitting words"); + + } + move_y = true; + } + + /* set positions */ + switch (css_computed_text_align(first->parent->parent->style)) { + case CSS_TEXT_ALIGN_RIGHT: + case CSS_TEXT_ALIGN_LIBCSS_RIGHT: + x0 = x1 - x; + break; + case CSS_TEXT_ALIGN_CENTER: + case CSS_TEXT_ALIGN_LIBCSS_CENTER: + x0 = (x0 + (x1 - x)) / 2; + break; + case CSS_TEXT_ALIGN_LEFT: + case CSS_TEXT_ALIGN_LIBCSS_LEFT: + case CSS_TEXT_ALIGN_JUSTIFY: + /* leave on left */ + break; + case CSS_TEXT_ALIGN_DEFAULT: + /* None; consider text direction */ + switch (css_computed_direction(first->parent->parent->style)) { + case CSS_DIRECTION_LTR: + /* leave on left */ + break; + case CSS_DIRECTION_RTL: + x0 = x1 - x; + break; + } + break; + } + + for (d = first; d != b; d = d->next) { + d->flags &= ~NEW_LINE; + + if (d->type == BOX_INLINE_BLOCK && + (css_computed_position(d->style) == + CSS_POSITION_ABSOLUTE || + css_computed_position(d->style) == + CSS_POSITION_FIXED)) { + /* positioned inline-blocks: + * set static position (x,y) only, rest of positioning + * is handled later */ + d->x += x0; + d->y = *y; + continue; + } else if ((d->type == BOX_INLINE && + ((d->object || d->gadget) == false) && + !(d->flags & IFRAME) && + !(d->flags & REPLACE_DIM)) || + d->type == BOX_BR || + d->type == BOX_TEXT || + d->type == BOX_INLINE_END) { + /* regular (non-replaced) inlines */ + d->x += x0; + d->y = *y - d->padding[TOP]; + + if (d->type == BOX_TEXT && d->height > used_height) { + /* text */ + used_height = d->height; + } + } else if ((d->type == BOX_INLINE) || + d->type == BOX_INLINE_BLOCK) { + /* replaced inlines and inline-blocks */ + d->x += x0; + d->y = *y + d->border[TOP].width + d->margin[TOP]; + h = d->margin[TOP] + d->border[TOP].width + + d->padding[TOP] + d->height + + d->padding[BOTTOM] + + d->border[BOTTOM].width + + d->margin[BOTTOM]; + if (used_height < h) + used_height = h; + } + } + + first->flags |= NEW_LINE; + + assert(b != first || (move_y && 0 < used_height && (left || right))); + + /* handle vertical-align by adjusting box y values */ + /** \todo proper vertical alignment handling */ + for (d = first; d != b; d = d->next) { + if ((d->type == BOX_INLINE && d->inline_end) || + d->type == BOX_BR || + d->type == BOX_TEXT || + d->type == BOX_INLINE_END) { + css_fixed value = 0; + css_unit unit = CSS_UNIT_PX; + switch (css_computed_vertical_align(d->style, &value, + &unit)) { + case CSS_VERTICAL_ALIGN_SUPER: + case CSS_VERTICAL_ALIGN_TOP: + case CSS_VERTICAL_ALIGN_TEXT_TOP: + /* already at top */ + break; + case CSS_VERTICAL_ALIGN_SUB: + case CSS_VERTICAL_ALIGN_BOTTOM: + case CSS_VERTICAL_ALIGN_TEXT_BOTTOM: + d->y += used_height - d->height; + break; + default: + case CSS_VERTICAL_ALIGN_BASELINE: + d->y += 0.75 * (used_height - d->height); + break; + } + } + } + + /* handle clearance for br */ + if (br_box && css_computed_clear(br_box->style) != CSS_CLEAR_NONE) { + int clear_y = layout_clear(cont->float_children, + css_computed_clear(br_box->style)); + if (used_height < clear_y - cy) + used_height = clear_y - cy; + } + + if (move_y) + *y += used_height; + *next_box = b; + *width = x; /* return actual width */ + return true; +} + + +/** + * Layout lines of text or inline boxes with floats. + * + * \param box inline container box + * \param width horizontal space available + * \param cont ancestor box which defines horizontal space, for floats + * \param cx box position relative to cont + * \param cy box position relative to cont + * \param content memory pool for any new boxes + * \return true on success, false on memory exhaustion + */ +static bool layout_inline_container(struct box *inline_container, int width, + struct box *cont, int cx, int cy, html_content *content) +{ + bool first_line = true; + bool has_text_children; + struct box *c, *next; + int y = 0; + int curwidth,maxwidth = width; + + assert(inline_container->type == BOX_INLINE_CONTAINER); + + NSLOG(layout, DEBUG, + "inline_container %p, width %i, cont %p, cx %i, cy %i", + inline_container, + width, + cont, + cx, + cy); + + + has_text_children = false; + for (c = inline_container->children; c; c = c->next) { + bool is_pre = false; + + if (c->style) { + enum css_white_space_e whitespace; + + whitespace = css_computed_white_space(c->style); + + is_pre = (whitespace == CSS_WHITE_SPACE_PRE || + whitespace == CSS_WHITE_SPACE_PRE_LINE || + whitespace == CSS_WHITE_SPACE_PRE_WRAP); + } + + if ((!c->object && !(c->flags & REPLACE_DIM) && + !(c->flags & IFRAME) && + c->text && (c->length || is_pre)) || + c->type == BOX_BR) + has_text_children = true; + } + + /** \todo fix wrapping so that a box with horizontal scrollbar will + * shrink back to 'width' if no word is wider than 'width' (Or just set + * curwidth = width and have the multiword lines wrap to the min width) + */ + for (c = inline_container->children; c; ) { + + NSLOG(layout, DEBUG, "c %p", c); + + curwidth = inline_container->width; + if (!layout_line(c, &curwidth, &y, cx, cy + y, cont, first_line, + has_text_children, content, &next)) + return false; + maxwidth = max(maxwidth,curwidth); + c = next; + first_line = false; + } + + inline_container->width = maxwidth; + inline_container->height = y; + + return true; +} + + +/** * Layout a block formatting context. * * \param block BLOCK, INLINE_BLOCK, or TABLE_CELL to layout @@ -2516,7 +3946,8 @@ layout_block_context(struct box *block, gadget_unit = CSS_UNIT_EM; gadget_size = INTTOFIX(1); if (block->height == AUTO) - block->height = FIXTOINT(nscss_len2px(gadget_size, + block->height = FIXTOINT(nscss_len2px( + &content->len_ctx, gadget_size, gadget_unit, block->style)); } @@ -2580,7 +4011,8 @@ layout_block_context(struct box *block, /* If we don't know which box the current margin collapses * through to, find out. Update the pos/neg margin values. */ if (margin_collapse == NULL) { - margin_collapse = layout_next_margin_block(box, block, + margin_collapse = layout_next_margin_block( + &content->len_ctx, box, block, viewport_height, &max_pos_margin, &max_neg_margin); /* We have a margin that has not yet been applied. */ @@ -2631,7 +4063,8 @@ layout_block_context(struct box *block, box->parent->padding[RIGHT] - x1; } - layout_block_find_dimensions(box->parent->width, + layout_block_find_dimensions(&content->len_ctx, + box->parent->width, viewport_height, lm, rm, box); if (box->type == BOX_BLOCK && !(box->flags & IFRAME)) { layout_block_add_scrollbar(box, RIGHT); @@ -2871,8 +4304,9 @@ layout_block_context(struct box *block, if (box->style && css_computed_position(box->style) != CSS_POSITION_ABSOLUTE && - layout_apply_minmax_height(box, - NULL)) { + layout_apply_minmax_height( + &content->len_ctx, + box, NULL)) { /* Height altered */ /* Set current cy */ cy += box->height - @@ -2928,19 +4362,23 @@ layout_block_context(struct box *block, if (block->style && css_computed_position(block->style) != CSS_POSITION_ABSOLUTE) { /* Block is in normal flow */ - layout_apply_minmax_height(block, NULL); + layout_apply_minmax_height(&content->len_ctx, block, NULL); } if (block->gadget && (block->gadget->type == GADGET_TEXTAREA || block->gadget->type == GADGET_PASSWORD || block->gadget->type == GADGET_TEXTBOX)) { + plot_font_style_t fstyle; int ta_width = block->padding[LEFT] + block->width + block->padding[RIGHT]; int ta_height = block->padding[TOP] + block->height + block->padding[BOTTOM]; + font_plot_style_from_css(&content->len_ctx, + block->style, &fstyle); + fstyle.background = NS_TRANSPARENT; textarea_set_layout(block->gadget->data.text.ta, - ta_width, ta_height, + &fstyle, ta_width, ta_height, block->padding[TOP], block->padding[RIGHT], block->padding[BOTTOM], block->padding[LEFT]); } @@ -2950,46 +4388,12 @@ layout_block_context(struct box *block, /** - * Calculate line height from a style. - */ -static int line_height(const css_computed_style *style) -{ - enum css_line_height_e lhtype; - css_fixed lhvalue = 0; - css_unit lhunit = CSS_UNIT_PX; - css_fixed line_height; - - assert(style); - - lhtype = css_computed_line_height(style, &lhvalue, &lhunit); - if (lhtype == CSS_LINE_HEIGHT_NORMAL) { - /* Normal => use a constant of 1.3 * font-size */ - lhvalue = FLTTOFIX(1.3); - lhtype = CSS_LINE_HEIGHT_NUMBER; - } - - if (lhtype == CSS_LINE_HEIGHT_NUMBER || - lhunit == CSS_UNIT_PCT) { - line_height = nscss_len2px(lhvalue, CSS_UNIT_EM, style); - - if (lhtype != CSS_LINE_HEIGHT_NUMBER) - line_height = FDIV(line_height, F_100); - } else { - assert(lhunit != CSS_UNIT_PCT); - - line_height = nscss_len2px(lhvalue, lhunit, style); - } - - return FIXTOINT(line_height); -} - - -/** * Layout list markers. */ static void layout_lists(struct box *box, - const struct gui_layout_table *font_func) + const struct gui_layout_table *font_func, + const nscss_len_ctx *len_ctx) { struct box *child; struct box *marker; @@ -3004,12 +4408,13 @@ layout_lists(struct box *box, marker->x = -marker->width; marker->height = content_get_height(marker->object); - marker->y = (line_height(marker->style) - + marker->y = (line_height(len_ctx, + marker->style) - marker->height) / 2; } else if (marker->text) { if (marker->width == UNKNOWN_WIDTH) { - font_plot_style_from_css(marker->style, - &fstyle); + font_plot_style_from_css(len_ctx, + marker->style, &fstyle); font_func->width(&fstyle, marker->text, marker->length, @@ -3018,7 +4423,8 @@ layout_lists(struct box *box, } marker->x = -marker->width; marker->y = 0; - marker->height = line_height(marker->style); + marker->height = line_height(len_ctx, + marker->style); } else { marker->x = 0; marker->y = 0; @@ -3028,7 +4434,7 @@ layout_lists(struct box *box, /* Gap between marker and content */ marker->x -= 4; } - layout_lists(child, font_func); + layout_lists(child, font_func, len_ctx); } } @@ -3037,6 +4443,7 @@ layout_lists(struct box *box, * Compute box offsets for a relatively or absolutely positioned box with * respect to a box. * + * \param len_ctx Length conversion context * \param box box to compute offsets for * \param containing_block box to compute percentages with respect to * \param top updated to top offset, or AUTO @@ -3047,7 +4454,8 @@ layout_lists(struct box *box, * See CSS 2.1 9.3.2. containing_block must have width and height. */ static void -layout_compute_offsets(struct box *box, +layout_compute_offsets(const nscss_len_ctx *len_ctx, + struct box *box, struct box *containing_block, int *top, int *right, @@ -3069,7 +4477,8 @@ layout_compute_offsets(struct box *box, *left = FPCT_OF_INT_TOINT(value, containing_block->width); } else { - *left = FIXTOINT(nscss_len2px(value, unit, box->style)); + *left = FIXTOINT(nscss_len2px(len_ctx, + value, unit, box->style)); } } else { *left = AUTO; @@ -3082,8 +4491,8 @@ layout_compute_offsets(struct box *box, *right = FPCT_OF_INT_TOINT(value, containing_block->width); } else { - *right = FIXTOINT(nscss_len2px(value, unit, - box->style)); + *right = FIXTOINT(nscss_len2px(len_ctx, + value, unit, box->style)); } } else { *right = AUTO; @@ -3096,7 +4505,8 @@ layout_compute_offsets(struct box *box, *top = FPCT_OF_INT_TOINT(value, containing_block->height); } else { - *top = FIXTOINT(nscss_len2px(value, unit, box->style)); + *top = FIXTOINT(nscss_len2px(len_ctx, + value, unit, box->style)); } } else { *top = AUTO; @@ -3109,8 +4519,8 @@ layout_compute_offsets(struct box *box, *bottom = FPCT_OF_INT_TOINT(value, containing_block->height); } else { - *bottom = FIXTOINT(nscss_len2px(value, unit, - box->style)); + *bottom = FIXTOINT(nscss_len2px(len_ctx, + value, unit, box->style)); } } else { *bottom = AUTO; @@ -3166,16 +4576,17 @@ layout_absolute(struct box *box, /** \todo inline containers */ } - layout_compute_offsets(box, containing_block, + layout_compute_offsets(&content->len_ctx, box, containing_block, &top, &right, &bottom, &left); /* Pass containing block into layout_find_dimensions via the float * containing block box member. This is unused for absolutely positioned * boxes because a box can't be floated and absolutely positioned. */ box->float_container = containing_block; - layout_find_dimensions(available_width, -1, box, box->style, - &width, &height, &max_width, &min_width, - 0, 0, margin, padding, border); + layout_find_dimensions(&content->len_ctx, available_width, -1, + box, box->style, &width, &height, + &max_width, &min_width, 0, 0, + margin, padding, border); box->float_container = NULL; /* 10.3.7 */ @@ -3490,7 +4901,7 @@ layout_absolute(struct box *box, /** \todo Inline ancestors */ } box->height = height; - layout_apply_minmax_height(box, containing_block); + layout_apply_minmax_height(&content->len_ctx, box, containing_block); return true; } @@ -3567,11 +4978,16 @@ layout_position_absolute(struct box *box, /** * Compute a box's relative offset as per CSS 2.1 9.4.3 * + * \param len_ctx Length conversion context * \param box Box to compute relative offsets for. * \param x Receives relative offset in x. * \param y Receives relative offset in y. */ -static void layout_compute_relative_offset(struct box *box, int *x, int *y) +static void layout_compute_relative_offset( + const nscss_len_ctx *len_ctx, + struct box *box, + int *x, + int *y) { int left, right, top, bottom; struct box *containing_block; @@ -3588,7 +5004,7 @@ static void layout_compute_relative_offset(struct box *box, int *x, int *y) containing_block = box->parent; } - layout_compute_offsets(box, containing_block, + layout_compute_offsets(len_ctx, box, containing_block, &top, &right, &bottom, &left); if (left == AUTO && right == AUTO) @@ -3636,6 +5052,7 @@ static void layout_compute_relative_offset(struct box *box, int *x, int *y) /** * Adjust positions of relatively positioned boxes. * + * \param len_ctx Length conversion context * \param root box to adjust the position of * \param fp box which forms the block formatting context for children of * "root" which are floats @@ -3647,7 +5064,12 @@ static void layout_compute_relative_offset(struct box *box, int *x, int *y) * box, "fp", for float children of "root" */ static void -layout_position_relative(struct box *root, struct box *fp, int fx, int fy) +layout_position_relative( + const nscss_len_ctx *len_ctx, + struct box *root, + struct box *fp, + int fx, + int fy) { struct box *box; /* for children of "root" */ struct box *fn; /* for block formatting context box for children of @@ -3671,7 +5093,8 @@ layout_position_relative(struct box *root, struct box *fp, int fx, int fy) /* If relatively positioned, get offsets */ if (box->style && css_computed_position(box->style) == CSS_POSITION_RELATIVE) - layout_compute_relative_offset(box, &x, &y); + layout_compute_relative_offset( + len_ctx, box, &x, &y); else x = y = 0; @@ -3707,7 +5130,7 @@ layout_position_relative(struct box *root, struct box *fp, int fx, int fy) } /* recurse first */ - layout_position_relative(box, fn, fnx, fny); + layout_position_relative(len_ctx, box, fn, fnx, fny); /* Ignore things we're not interested in. */ if (!box->style || (box->style && @@ -3733,1369 +5156,10 @@ layout_position_relative(struct box *root, struct box *fp, int fx, int fy) } -/* exported function documented in render/layout.h */ -bool layout_document(html_content *content, int width, int height) -{ - bool ret; - struct box *doc = content->layout; - const struct gui_layout_table *font_func = content->font_func; - - layout_minmax_block(doc, font_func); - - layout_block_find_dimensions(width, height, 0, 0, doc); - doc->x = doc->margin[LEFT] + doc->border[LEFT].width; - doc->y = doc->margin[TOP] + doc->border[TOP].width; - width -= doc->margin[LEFT] + doc->border[LEFT].width + - doc->padding[LEFT] + doc->padding[RIGHT] + - doc->border[RIGHT].width + doc->margin[RIGHT]; - if (width < 0) { - width = 0; - } - doc->width = width; - - ret = layout_block_context(doc, height, content); - - /* make <html> and <body> fill available height */ - if (doc->y + doc->padding[TOP] + doc->height + doc->padding[BOTTOM] + - doc->border[BOTTOM].width + doc->margin[BOTTOM] < - height) { - doc->height = height - (doc->y + doc->padding[TOP] + - doc->padding[BOTTOM] + - doc->border[BOTTOM].width + - doc->margin[BOTTOM]); - if (doc->children) - doc->children->height = doc->height - - (doc->children->margin[TOP] + - doc->children->border[TOP].width + - doc->children->padding[TOP] + - doc->children->padding[BOTTOM] + - doc->children->border[BOTTOM].width + - doc->children->margin[BOTTOM]); - } - - layout_lists(doc, font_func); - layout_position_absolute(doc, doc, 0, 0, content); - layout_position_relative(doc, doc, 0, 0); - - layout_calculate_descendant_bboxes(doc); - - return ret; -} - - -/** - * Insert a float into a container. - * - * \param cont block formatting context block, used to contain float - * \param b box to add to float - * - * This sorts floats in order of descending bottom edges. - */ -static void add_float_to_container(struct box *cont, struct box *b) -{ - struct box *box = cont->float_children; - int b_bottom = b->y + b->height; - - assert(b->type == BOX_FLOAT_LEFT || b->type == BOX_FLOAT_RIGHT); - - if (box == NULL) { - /* No other float children */ - b->next_float = NULL; - cont->float_children = b; - return; - } else if (b_bottom >= box->y + box->height) { - /* Goes at start of list */ - b->next_float = cont->float_children; - cont->float_children = b; - } else { - struct box *prev = NULL; - while (box != NULL && b_bottom < box->y + box->height) { - prev = box; - box = box->next_float; - } - if (prev != NULL) { - b->next_float = prev->next_float; - prev->next_float = b; - } - } -} - - -/** - * Split a text box. - * - * \param content memory pool for any new boxes - * \param fstyle style for text in text box - * \param split_box box with text to split - * \param new_length new length for text in split_box, after splitting - * \param new_width new width for text in split_box, after splitting - * \return true on success, false on memory exhaustion - * - * A new box is created and inserted into the box tree after split_box, - * containing the text after new_length excluding the initial space character. - */ -static bool -layout_text_box_split(html_content *content, - plot_font_style_t *fstyle, - struct box *split_box, - size_t new_length, - int new_width) -{ - int space_width = split_box->space; - struct box *c2; - const struct gui_layout_table *font_func = content->font_func; - bool space = (split_box->text[new_length] == ' '); - int used_length = new_length + (space ? 1 : 0); - - if ((space && space_width == 0) || space_width == UNKNOWN_WIDTH) { - /* We're need to add a space, and we don't know how big - * it's to be, OR we have a space of unknown width anyway; - * Calculate space width */ - font_func->width(fstyle, " ", 1, &space_width); - } - - if (split_box->space == UNKNOWN_WIDTH) - split_box->space = space_width; - if (!space) - space_width = 0; - - /* Create clone of split_box, c2 */ - c2 = talloc_memdup(content->bctx, split_box, sizeof *c2); - if (!c2) - return false; - c2->flags |= CLONE; - - /* Set remaining text in c2 */ - c2->text += used_length; - - /* Set c2 according to the remaining text */ - c2->width -= new_width + space_width; - c2->flags &= ~MEASURED; /* width has been estimated */ - c2->length = split_box->length - used_length; - - /* Update split_box for its reduced text */ - split_box->width = new_width; - split_box->flags |= MEASURED; - split_box->length = new_length; - split_box->space = space_width; - - /* Insert c2 into box list */ - c2->next = split_box->next; - split_box->next = c2; - c2->prev = split_box; - if (c2->next) - c2->next->prev = c2; - else - c2->parent->last = c2; - - NSLOG(layout, DEBUG, - "split_box %p len: %" PRIsizet " \"%.*s\"", - split_box, - split_box->length, - (int)split_box->length, - split_box->text); - NSLOG(layout, DEBUG, - " new_box %p len: %" PRIsizet " \"%.*s\"", - c2, - c2->length, - (int)c2->length, - c2->text); - - return true; -} - - -/** - * Compute dimensions of box, margins, paddings, and borders for a floating - * element using shrink-to-fit. Also used for inline-blocks. - * - * \param available_width Max width available in pixels - * \param style Box's style - * \param box Box for which to find dimensions - * Box margins, borders, paddings, width and - * height are updated. - */ -static void -layout_float_find_dimensions(int available_width, - const css_computed_style *style, - struct box *box) -{ - int width, height, max_width, min_width, max_height, min_height; - int *margin = box->margin; - int *padding = box->padding; - struct box_border *border = box->border; - enum css_overflow_e overflow_x = css_computed_overflow_x(style); - enum css_overflow_e overflow_y = css_computed_overflow_y(style); - int scrollbar_width_x = - (overflow_x == CSS_OVERFLOW_SCROLL || - overflow_x == CSS_OVERFLOW_AUTO) ? - SCROLLBAR_WIDTH : 0; - int scrollbar_width_y = - (overflow_y == CSS_OVERFLOW_SCROLL || - overflow_y == CSS_OVERFLOW_AUTO) ? - SCROLLBAR_WIDTH : 0; - - layout_find_dimensions(available_width, -1, box, style, &width, &height, - &max_width, &min_width, &max_height, &min_height, - margin, padding, border); - - if (margin[LEFT] == AUTO) - margin[LEFT] = 0; - if (margin[RIGHT] == AUTO) - margin[RIGHT] = 0; - - if (box->gadget == NULL) { - padding[RIGHT] += scrollbar_width_y; - padding[BOTTOM] += scrollbar_width_x; - } - - if (box->object && !(box->flags & REPLACE_DIM) && - content_get_type(box->object) != CONTENT_HTML) { - /* Floating replaced element, with intrinsic width or height. - * See 10.3.6 and 10.6.2 */ - layout_get_object_dimensions(box, &width, &height, - min_width, max_width, min_height, max_height); - } else if (box->gadget && (box->gadget->type == GADGET_TEXTBOX || - box->gadget->type == GADGET_PASSWORD || - box->gadget->type == GADGET_FILE || - box->gadget->type == GADGET_TEXTAREA)) { - css_fixed size = 0; - css_unit unit = CSS_UNIT_EM; - - /* Give sensible dimensions to gadgets, with auto width/height, - * that don't shrink to fit contained text. */ - assert(box->style); - - if (box->gadget->type == GADGET_TEXTBOX || - box->gadget->type == GADGET_PASSWORD || - box->gadget->type == GADGET_FILE) { - if (width == AUTO) { - size = INTTOFIX(10); - width = FIXTOINT(nscss_len2px(size, unit, - box->style)); - } - if (box->gadget->type == GADGET_FILE && - height == AUTO) { - size = FLTTOFIX(1.5); - height = FIXTOINT(nscss_len2px(size, unit, - box->style)); - } - } - if (box->gadget->type == GADGET_TEXTAREA) { - if (width == AUTO) { - size = INTTOFIX(10); - width = FIXTOINT(nscss_len2px(size, unit, - box->style)); - } - if (height == AUTO) { - size = INTTOFIX(4); - height = FIXTOINT(nscss_len2px(size, unit, - box->style)); - } - } - } else if (width == AUTO) { - /* CSS 2.1 section 10.3.5 */ - width = min(max(box->min_width, available_width), - box->max_width); - - /* width includes margin, borders and padding */ - if (width == available_width) { - width -= box->margin[LEFT] + box->border[LEFT].width + - box->padding[LEFT] + - box->padding[RIGHT] + - box->border[RIGHT].width + - box->margin[RIGHT]; - } else { - /* width was obtained from a min_width or max_width - * value, so need to use the same method for calculating - * mbp as was used in layout_minmax_block() */ - int fixed = 0; - float frac = 0; - calculate_mbp_width(box->style, LEFT, true, true, true, - &fixed, &frac); - calculate_mbp_width(box->style, RIGHT, true, true, true, - &fixed, &frac); - if (fixed < 0) - fixed = 0; - - width -= fixed; - } - - if (max_width >= 0 && width > max_width) width = max_width; - if (min_width > 0 && width < min_width) width = min_width; - - } else { - if (max_width >= 0 && width > max_width) width = max_width; - if (min_width > 0 && width < min_width) width = min_width; - width -= scrollbar_width_y; - } - - box->width = width; - box->height = height; - - if (margin[TOP] == AUTO) - margin[TOP] = 0; - if (margin[BOTTOM] == AUTO) - margin[BOTTOM] = 0; -} - - -/** - * Layout the contents of a float or inline block. - * - * \param b float or inline block box - * \param width available width - * \param content memory pool for any new boxes - * \return true on success, false on memory exhaustion - */ -static bool layout_float(struct box *b, int width, html_content *content) -{ - assert(b->type == BOX_TABLE || b->type == BOX_BLOCK || - b->type == BOX_INLINE_BLOCK); - layout_float_find_dimensions(width, b->style, b); - if (b->type == BOX_TABLE) { - if (!layout_table(b, width, content)) - return false; - if (b->margin[LEFT] == AUTO) - b->margin[LEFT] = 0; - if (b->margin[RIGHT] == AUTO) - b->margin[RIGHT] = 0; - if (b->margin[TOP] == AUTO) - b->margin[TOP] = 0; - if (b->margin[BOTTOM] == AUTO) - b->margin[BOTTOM] = 0; - } else - return layout_block_context(b, -1, content); - return true; -} - - -/** - * Position a float in the first available space. - * - * \param c float box to position - * \param width available width - * \param cx x coordinate relative to cont to place float right of - * \param y y coordinate relative to cont to place float below - * \param cont ancestor box which defines horizontal space, for floats - */ -static void -place_float_below(struct box *c, int width, int cx, int y, struct box *cont) -{ - int x0, x1, yy; - struct box *left; - struct box *right; - - yy = y > cont->cached_place_below_level ? - y : cont->cached_place_below_level; - - NSLOG(layout, DEBUG, - "c %p, width %i, cx %i, y %i, cont %p", c, - width, cx, y, cont); - - do { - y = yy; - x0 = cx; - x1 = cx + width; - find_sides(cont->float_children, y, y + c->height, &x0, &x1, - &left, &right); - if (left != 0 && right != 0) { - yy = (left->y + left->height < - right->y + right->height ? - left->y + left->height : - right->y + right->height); - } else if (left == 0 && right != 0) { - yy = right->y + right->height; - } else if (left != 0 && right == 0) { - yy = left->y + left->height; - } - } while ((left != 0 || right != 0) && (c->width > x1 - x0)); - - if (c->type == BOX_FLOAT_LEFT) { - c->x = x0; - } else { - c->x = x1 - c->width; - } - c->y = y; - cont->cached_place_below_level = y; -} - - -/** - * Position a line of boxes in inline formatting context. - * - * \param first box at start of line - * \param width available width on input, updated with actual width on output - * (may be incorrect if the line gets split?) - * \param y coordinate of top of line, updated on exit to bottom - * \param cx coordinate of left of line relative to cont - * \param cy coordinate of top of line relative to cont - * \param cont ancestor box which defines horizontal space, for floats - * \param indent apply any first-line indent - * \param has_text_children at least one TEXT in the inline_container - * \param next_box updated to first box for next line, or 0 at end - * \param content memory pool for any new boxes - * \return true on success, false on memory exhaustion - */ -static bool -layout_line(struct box *first, - int *width, - int *y, - int cx, - int cy, - struct box *cont, - bool indent, - bool has_text_children, - html_content *content, - struct box **next_box) -{ - int height, used_height; - int x0 = 0; - int x1 = *width; - int x, h, x_previous; - int fy = cy; - struct box *left; - struct box *right; - struct box *b; - struct box *split_box = 0; - struct box *d; - struct box *br_box = 0; - bool move_y = false; - bool place_below = false; - int space_before = 0, space_after = 0; - unsigned int inline_count = 0; - unsigned int i; - const struct gui_layout_table *font_func = content->font_func; - plot_font_style_t fstyle; - - NSLOG(layout, DEBUG, - "first %p, first->text '%.*s', width %i, y %i, cx %i, cy %i", - first, - (int)first->length, - first->text, - *width, - *y, - cx, - cy); - - /* find sides at top of line */ - x0 += cx; - x1 += cx; - find_sides(cont->float_children, cy, cy, &x0, &x1, &left, &right); - x0 -= cx; - x1 -= cx; - - if (indent) - x0 += layout_text_indent(first->parent->parent->style, *width); - - if (x1 < x0) - x1 = x0; - - /* get minimum line height from containing block. - * this is the line-height if there are text children and also in the - * case of an initially empty text input */ - if (has_text_children || first->parent->parent->gadget) - used_height = height = - line_height(first->parent->parent->style); - else - /* inline containers with no text are usually for layout and - * look better with no minimum line-height */ - used_height = height = 0; - - /* pass 1: find height of line assuming sides at top of line: loop - * body executed at least once - * keep in sync with the loop in layout_minmax_line() */ - - NSLOG(layout, DEBUG, "x0 %i, x1 %i, x1 - x0 %i", x0, x1, x1 - x0); - - - for (x = 0, b = first; x <= x1 - x0 && b != 0; b = b->next) { - int min_width, max_width, min_height, max_height; - - assert(b->type == BOX_INLINE || b->type == BOX_INLINE_BLOCK || - b->type == BOX_FLOAT_LEFT || - b->type == BOX_FLOAT_RIGHT || - b->type == BOX_BR || b->type == BOX_TEXT || - b->type == BOX_INLINE_END); - - - NSLOG(layout, DEBUG, "pass 1: b %p, x %i", b, x); - - - if (b->type == BOX_BR) - break; - - if (b->type == BOX_FLOAT_LEFT || b->type == BOX_FLOAT_RIGHT) - continue; - if (b->type == BOX_INLINE_BLOCK && - (css_computed_position(b->style) == - CSS_POSITION_ABSOLUTE || - css_computed_position(b->style) == - CSS_POSITION_FIXED)) - continue; - - assert(b->style != NULL); - font_plot_style_from_css(b->style, &fstyle); - - x += space_after; - - if (b->type == BOX_INLINE_BLOCK) { - if (b->max_width != UNKNOWN_WIDTH) - if (!layout_float(b, *width, content)) - return false; - h = b->border[TOP].width + b->padding[TOP] + b->height + - b->padding[BOTTOM] + - b->border[BOTTOM].width; - if (height < h) - height = h; - x += b->margin[LEFT] + b->border[LEFT].width + - b->padding[LEFT] + b->width + - b->padding[RIGHT] + - b->border[RIGHT].width + - b->margin[RIGHT]; - space_after = 0; - continue; - } - - if (b->type == BOX_INLINE) { - /* calculate borders, margins, and padding */ - layout_find_dimensions(*width, -1, b, b->style, 0, 0, - 0, 0, 0, 0, b->margin, b->padding, - b->border); - for (i = 0; i != 4; i++) - if (b->margin[i] == AUTO) - b->margin[i] = 0; - x += b->margin[LEFT] + b->border[LEFT].width + - b->padding[LEFT]; - if (b->inline_end) { - b->inline_end->margin[RIGHT] = b->margin[RIGHT]; - b->inline_end->padding[RIGHT] = - b->padding[RIGHT]; - b->inline_end->border[RIGHT] = - b->border[RIGHT]; - } else { - x += b->padding[RIGHT] + - b->border[RIGHT].width + - b->margin[RIGHT]; - } - } else if (b->type == BOX_INLINE_END) { - b->width = 0; - if (b->space == UNKNOWN_WIDTH) { - font_func->width(&fstyle, " ", 1, &b->space); - /** \todo handle errors */ - } - space_after = b->space; - - x += b->padding[RIGHT] + b->border[RIGHT].width + - b->margin[RIGHT]; - continue; - } - - if (!b->object && !(b->flags & IFRAME) && !b->gadget && - !(b->flags & REPLACE_DIM)) { - /* inline non-replaced, 10.3.1 and 10.6.1 */ - b->height = line_height(b->style ? b->style : - b->parent->parent->style); - if (height < b->height) - height = b->height; - - if (!b->text) { - b->width = 0; - space_after = 0; - continue; - } - - if (b->width == UNKNOWN_WIDTH) { - /** \todo handle errors */ - - /* If it's a select element, we must use the - * width of the widest option text */ - if (b->parent->parent->gadget && - b->parent->parent->gadget->type - == GADGET_SELECT) { - int opt_maxwidth = 0; - struct form_option *o; - - for (o = b->parent->parent->gadget-> - data.select.items; o; - o = o->next) { - int opt_width; - font_func->width(&fstyle, - o->text, - strlen(o->text), - &opt_width); - - if (opt_maxwidth < opt_width) - opt_maxwidth =opt_width; - } - b->width = opt_maxwidth; - if (nsoption_bool(core_select_menu)) - b->width += SCROLLBAR_WIDTH; - } else { - font_func->width(&fstyle, b->text, - b->length, &b->width); - b->flags |= MEASURED; - } - } - - /* If the current text has not been measured (i.e. its - * width was estimated after splitting), and it fits on - * the line, measure it properly, so next box is placed - * correctly. */ - if (b->text && (x + b->width < x1 - x0) && - !(b->flags & MEASURED) && - b->next) { - font_func->width(&fstyle, b->text, - b->length, &b->width); - b->flags |= MEASURED; - } - - x += b->width; - if (b->space == UNKNOWN_WIDTH) { - font_func->width(&fstyle, " ", 1, &b->space); - /** \todo handle errors */ - } - space_after = b->space; - continue; - } - - space_after = 0; - - /* inline replaced, 10.3.2 and 10.6.2 */ - assert(b->style); - - layout_find_dimensions(*width, -1, b, b->style, - &b->width, &b->height, &max_width, &min_width, - &max_height, &min_height, NULL, NULL, NULL); - - if (b->object && !(b->flags & REPLACE_DIM)) { - layout_get_object_dimensions(b, &b->width, &b->height, - min_width, max_width, - min_height, max_height); - } else if (b->flags & IFRAME) { - /* TODO: should we look at the content dimensions? */ - if (b->width == AUTO) - b->width = 400; - if (b->height == AUTO) - b->height = 300; - - /* We reformat the iframe browser window to new - * dimensions in pass 2 */ - } else { - /* form control with no object */ - if (b->width == AUTO) - b->width = FIXTOINT(nscss_len2px(INTTOFIX(1), - CSS_UNIT_EM, b->style)); - if (b->height == AUTO) - b->height = FIXTOINT(nscss_len2px(INTTOFIX(1), - CSS_UNIT_EM, b->style)); - } - - /* Reformat object to new box size */ - if (b->object && content_get_type(b->object) == CONTENT_HTML && - b->width != - content_get_available_width(b->object)) { - css_fixed value = 0; - css_unit unit = CSS_UNIT_PX; - enum css_height_e htype = css_computed_height(b->style, - &value, &unit); - - content_reformat(b->object, false, b->width, b->height); - - if (htype == CSS_HEIGHT_AUTO) - b->height = content_get_height(b->object); - } - - if (height < b->height) - height = b->height; - - x += b->width; - } - - /* find new sides using this height */ - x0 = cx; - x1 = cx + *width; - find_sides(cont->float_children, cy, cy + height, &x0, &x1, - &left, &right); - x0 -= cx; - x1 -= cx; - - if (indent) - x0 += layout_text_indent(first->parent->parent->style, *width); - - if (x1 < x0) - x1 = x0; - - space_after = space_before = 0; - - /* pass 2: place boxes in line: loop body executed at least once */ - - NSLOG(layout, DEBUG, "x0 %i, x1 %i, x1 - x0 %i", x0, x1, x1 - x0); - - for (x = x_previous = 0, b = first; x <= x1 - x0 && b; b = b->next) { - - NSLOG(layout, DEBUG, "pass 2: b %p, x %i", b, x); - - if (b->type == BOX_INLINE_BLOCK && - (css_computed_position(b->style) == - CSS_POSITION_ABSOLUTE || - css_computed_position(b->style) == - CSS_POSITION_FIXED)) { - b->x = x + space_after; - - } else if (b->type == BOX_INLINE || - b->type == BOX_INLINE_BLOCK || - b->type == BOX_TEXT || - b->type == BOX_INLINE_END) { - assert(b->width != UNKNOWN_WIDTH); - - x_previous = x; - x += space_after; - b->x = x; - - if ((b->type == BOX_INLINE && !b->inline_end) || - b->type == BOX_INLINE_BLOCK) { - b->x += b->margin[LEFT] + b->border[LEFT].width; - x = b->x + b->padding[LEFT] + b->width + - b->padding[RIGHT] + - b->border[RIGHT].width + - b->margin[RIGHT]; - } else if (b->type == BOX_INLINE) { - b->x += b->margin[LEFT] + b->border[LEFT].width; - x = b->x + b->padding[LEFT] + b->width; - } else if (b->type == BOX_INLINE_END) { - b->height = b->inline_end->height; - x += b->padding[RIGHT] + - b->border[RIGHT].width + - b->margin[RIGHT]; - } else { - x += b->width; - } - - space_before = space_after; - if (b->object || b->flags & REPLACE_DIM || - b->flags & IFRAME) - space_after = 0; - else if (b->text || b->type == BOX_INLINE_END) { - if (b->space == UNKNOWN_WIDTH) { - font_plot_style_from_css(b->style, - &fstyle); - /** \todo handle errors */ - font_func->width(&fstyle, " ", 1, - &b->space); - } - space_after = b->space; - } else { - space_after = 0; - } - split_box = b; - move_y = true; - inline_count++; - } else if (b->type == BOX_BR) { - b->x = x; - b->width = 0; - br_box = b; - b = b->next; - split_box = 0; - move_y = true; - break; - - } else { - /* float */ - NSLOG(layout, DEBUG, "float %p", b); - - d = b->children; - d->float_children = 0; - d->cached_place_below_level = 0; - b->float_container = d->float_container = cont; - - if (!layout_float(d, *width, content)) - return false; - - NSLOG(layout, DEBUG, - "%p : %d %d", - d, - d->margin[TOP], - d->border[TOP].width); - - d->x = d->margin[LEFT] + d->border[LEFT].width; - d->y = d->margin[TOP] + d->border[TOP].width; - b->width = d->margin[LEFT] + d->border[LEFT].width + - d->padding[LEFT] + d->width + - d->padding[RIGHT] + - d->border[RIGHT].width + - d->margin[RIGHT]; - b->height = d->margin[TOP] + d->border[TOP].width + - d->padding[TOP] + d->height + - d->padding[BOTTOM] + - d->border[BOTTOM].width + - d->margin[BOTTOM]; - - if (b->width > (x1 - x0) - x) - place_below = true; - if (d->style && (css_computed_clear(d->style) == - CSS_CLEAR_NONE || - (css_computed_clear(d->style) == - CSS_CLEAR_LEFT && left == 0) || - (css_computed_clear(d->style) == - CSS_CLEAR_RIGHT && - right == 0) || - (css_computed_clear(d->style) == - CSS_CLEAR_BOTH && - left == 0 && right == 0)) && - (!place_below || - (left == 0 && right == 0 && x == 0)) && - cy >= cont->clear_level && - cy >= cont->cached_place_below_level) { - /* + not cleared or, - * cleared and there are no floats to clear - * + fits without needing to be placed below or, - * this line is empty with no floats - * + current y, cy, is below the clear level - * - * Float affects current line */ - if (b->type == BOX_FLOAT_LEFT) { - b->x = cx + x0; - if (b->width > 0) - x0 += b->width; - left = b; - } else { - b->x = cx + x1 - b->width; - if (b->width > 0) - x1 -= b->width; - right = b; - } - b->y = cy; - } else { - /* cleared or doesn't fit on line */ - /* place below into next available space */ - int fcy = (cy > cont->clear_level) ? cy : - cont->clear_level; - fcy = (fcy > cont->cached_place_below_level) ? - fcy : - cont->cached_place_below_level; - fy = (fy > fcy) ? fy : fcy; - fy = (fy == cy) ? fy + height : fy; - - place_float_below(b, *width, cx, fy, cont); - fy = b->y; - if (d->style && ( - (css_computed_clear(d->style) == - CSS_CLEAR_LEFT && left != 0) || - (css_computed_clear(d->style) == - CSS_CLEAR_RIGHT && - right != 0) || - (css_computed_clear(d->style) == - CSS_CLEAR_BOTH && - (left != 0 || right != 0)))) { - /* to be cleared below existing - * floats */ - if (b->type == BOX_FLOAT_LEFT) - b->x = cx; - else - b->x = cx + *width - b->width; - - fcy = layout_clear(cont->float_children, - css_computed_clear(d->style)); - if (fcy > cont->clear_level) - cont->clear_level = fcy; - if (b->y < fcy) - b->y = fcy; - } - if (b->type == BOX_FLOAT_LEFT) - left = b; - else - right = b; - } - add_float_to_container(cont, b); - - split_box = 0; - } - } - - if (x1 - x0 < x && split_box) { - /* the last box went over the end */ - size_t split = 0; - int w; - bool no_wrap = css_computed_white_space( - split_box->style) == CSS_WHITE_SPACE_NOWRAP || - css_computed_white_space( - split_box->style) == CSS_WHITE_SPACE_PRE; - - x = x_previous; - - if (!no_wrap && - (split_box->type == BOX_INLINE || - split_box->type == BOX_TEXT) && - !split_box->object && - !(split_box->flags & REPLACE_DIM) && - !(split_box->flags & IFRAME) && - !split_box->gadget && split_box->text) { - - font_plot_style_from_css(split_box->style, &fstyle); - /** \todo handle errors */ - font_func->split(&fstyle, - split_box->text, - split_box->length, - x1 - x0 - x - space_before, - &split, - &w); - } - - /* split == 0 implies that text can't be split */ - - if (split == 0) - w = split_box->width; - - - NSLOG(layout, DEBUG, - "splitting: split_box %p \"%.*s\", spilt %zu, w %i, " - "left %p, right %p, inline_count %u", - split_box, - (int)split_box->length, - split_box->text, - split, - w, - left, - right, - inline_count); - - if ((split == 0 || x1 - x0 <= x + space_before + w) && - !left && !right && inline_count == 1) { - /* first word of box doesn't fit, but no floats and - * first box on line so force in */ - if (split == 0 || split == split_box->length) { - /* only one word in this box, or not text - * or white-space:nowrap */ - b = split_box->next; - } else { - /* cut off first word for this line */ - if (!layout_text_box_split(content, &fstyle, - split_box, split, w)) - return false; - b = split_box->next; - } - x += space_before + w; - - NSLOG(layout, DEBUG, "forcing"); - - } else if ((split == 0 || x1 - x0 <= x + space_before + w) && - inline_count == 1) { - /* first word of first box doesn't fit, but a float is - * taking some of the width so move below it */ - assert(left || right); - used_height = 0; - if (left) { - - NSLOG(layout, DEBUG, - "cy %i, left->y %i, left->height %i", - cy, - left->y, - left->height); - - used_height = left->y + left->height - cy + 1; - - NSLOG(layout, DEBUG, "used_height %i", - used_height); - - } - if (right && used_height < - right->y + right->height - cy + 1) - used_height = right->y + right->height - cy + 1; - - if (used_height < 0) - used_height = 0; - - b = split_box; - - NSLOG(layout, DEBUG, "moving below float"); - - } else if (split == 0 || x1 - x0 <= x + space_before + w) { - /* first word of box doesn't fit so leave box for next - * line */ - b = split_box; - - NSLOG(layout, DEBUG, "leaving for next line"); - - } else { - /* fit as many words as possible */ - assert(split != 0); - - NSLOG(layout, DEBUG, "'%.*s' %i %zu %i", - (int)split_box->length, split_box->text, - x1 - x0, split, w); - - if (split != split_box->length) { - if (!layout_text_box_split(content, &fstyle, - split_box, split, w)) - return false; - b = split_box->next; - } - x += space_before + w; - - NSLOG(layout, DEBUG, "fitting words"); - - } - move_y = true; - } - - /* set positions */ - switch (css_computed_text_align(first->parent->parent->style)) { - case CSS_TEXT_ALIGN_RIGHT: - case CSS_TEXT_ALIGN_LIBCSS_RIGHT: - x0 = x1 - x; - break; - case CSS_TEXT_ALIGN_CENTER: - case CSS_TEXT_ALIGN_LIBCSS_CENTER: - x0 = (x0 + (x1 - x)) / 2; - break; - case CSS_TEXT_ALIGN_LEFT: - case CSS_TEXT_ALIGN_LIBCSS_LEFT: - case CSS_TEXT_ALIGN_JUSTIFY: - /* leave on left */ - break; - case CSS_TEXT_ALIGN_DEFAULT: - /* None; consider text direction */ - switch (css_computed_direction(first->parent->parent->style)) { - case CSS_DIRECTION_LTR: - /* leave on left */ - break; - case CSS_DIRECTION_RTL: - x0 = x1 - x; - break; - } - break; - } - - for (d = first; d != b; d = d->next) { - d->flags &= ~NEW_LINE; - - if (d->type == BOX_INLINE_BLOCK && - (css_computed_position(d->style) == - CSS_POSITION_ABSOLUTE || - css_computed_position(d->style) == - CSS_POSITION_FIXED)) { - /* positioned inline-blocks: - * set static position (x,y) only, rest of positioning - * is handled later */ - d->x += x0; - d->y = *y; - continue; - } else if ((d->type == BOX_INLINE && - ((d->object || d->gadget) == false) && - !(d->flags & IFRAME) && - !(d->flags & REPLACE_DIM)) || - d->type == BOX_BR || - d->type == BOX_TEXT || - d->type == BOX_INLINE_END) { - /* regular (non-replaced) inlines */ - d->x += x0; - d->y = *y - d->padding[TOP]; - - if (d->type == BOX_TEXT && d->height > used_height) { - /* text */ - used_height = d->height; - } - } else if ((d->type == BOX_INLINE) || - d->type == BOX_INLINE_BLOCK) { - /* replaced inlines and inline-blocks */ - d->x += x0; - d->y = *y + d->border[TOP].width + d->margin[TOP]; - h = d->margin[TOP] + d->border[TOP].width + - d->padding[TOP] + d->height + - d->padding[BOTTOM] + - d->border[BOTTOM].width + - d->margin[BOTTOM]; - if (used_height < h) - used_height = h; - } - } - - first->flags |= NEW_LINE; - - assert(b != first || (move_y && 0 < used_height && (left || right))); - - /* handle vertical-align by adjusting box y values */ - /** \todo proper vertical alignment handling */ - for (d = first; d != b; d = d->next) { - if ((d->type == BOX_INLINE && d->inline_end) || - d->type == BOX_BR || - d->type == BOX_TEXT || - d->type == BOX_INLINE_END) { - css_fixed value = 0; - css_unit unit = CSS_UNIT_PX; - switch (css_computed_vertical_align(d->style, &value, - &unit)) { - case CSS_VERTICAL_ALIGN_SUPER: - case CSS_VERTICAL_ALIGN_TOP: - case CSS_VERTICAL_ALIGN_TEXT_TOP: - /* already at top */ - break; - case CSS_VERTICAL_ALIGN_SUB: - case CSS_VERTICAL_ALIGN_BOTTOM: - case CSS_VERTICAL_ALIGN_TEXT_BOTTOM: - d->y += used_height - d->height; - break; - default: - case CSS_VERTICAL_ALIGN_BASELINE: - d->y += 0.75 * (used_height - d->height); - break; - } - } - } - - /* handle clearance for br */ - if (br_box && css_computed_clear(br_box->style) != CSS_CLEAR_NONE) { - int clear_y = layout_clear(cont->float_children, - css_computed_clear(br_box->style)); - if (used_height < clear_y - cy) - used_height = clear_y - cy; - } - - if (move_y) - *y += used_height; - *next_box = b; - *width = x; /* return actual width */ - return true; -} - - -/* exported function documented in render/layout.h */ -bool layout_inline_container(struct box *inline_container, int width, - struct box *cont, int cx, int cy, html_content *content) -{ - bool first_line = true; - bool has_text_children; - struct box *c, *next; - int y = 0; - int curwidth,maxwidth = width; - - assert(inline_container->type == BOX_INLINE_CONTAINER); - - NSLOG(layout, DEBUG, - "inline_container %p, width %i, cont %p, cx %i, cy %i", - inline_container, - width, - cont, - cx, - cy); - - - has_text_children = false; - for (c = inline_container->children; c; c = c->next) { - bool is_pre = false; - - if (c->style) { - enum css_white_space_e whitespace; - - whitespace = css_computed_white_space(c->style); - - is_pre = (whitespace == CSS_WHITE_SPACE_PRE || - whitespace == CSS_WHITE_SPACE_PRE_LINE || - whitespace == CSS_WHITE_SPACE_PRE_WRAP); - } - - if ((!c->object && !(c->flags & REPLACE_DIM) && - !(c->flags & IFRAME) && - c->text && (c->length || is_pre)) || - c->type == BOX_BR) - has_text_children = true; - } - - /** \todo fix wrapping so that a box with horizontal scrollbar will - * shrink back to 'width' if no word is wider than 'width' (Or just set - * curwidth = width and have the multiword lines wrap to the min width) - */ - for (c = inline_container->children; c; ) { - - NSLOG(layout, DEBUG, "c %p", c); - - curwidth = inline_container->width; - if (!layout_line(c, &curwidth, &y, cx, cy + y, cont, first_line, - has_text_children, content, &next)) - return false; - maxwidth = max(maxwidth,curwidth); - c = next; - first_line = false; - } - - inline_container->width = maxwidth; - inline_container->height = y; - - return true; -} - - -/* exported function documented in render/layout.h */ -void -layout_minmax_table(struct box *table, const struct gui_layout_table *font_func) -{ - unsigned int i, j; - int border_spacing_h = 0; - int table_min = 0, table_max = 0; - int extra_fixed = 0; - float extra_frac = 0; - struct column *col = table->col; - struct box *row_group, *row, *cell; - enum css_width_e wtype; - css_fixed value = 0; - css_unit unit = CSS_UNIT_PX; - - /* check if the widths have already been calculated */ - if (table->max_width != UNKNOWN_MAX_WIDTH) - return; - - /* start with 0 except for fixed-width columns */ - for (i = 0; i != table->columns; i++) { - if (col[i].type == COLUMN_WIDTH_FIXED) - col[i].min = col[i].max = col[i].width; - else - col[i].min = col[i].max = 0; - } - - /* border-spacing is used in the separated borders model */ - if (css_computed_border_collapse(table->style) == - CSS_BORDER_COLLAPSE_SEPARATE) { - css_fixed h = 0, v = 0; - css_unit hu = CSS_UNIT_PX, vu = CSS_UNIT_PX; - - css_computed_border_spacing(table->style, &h, &hu, &v, &vu); - - border_spacing_h = FIXTOINT(nscss_len2px(h, hu, table->style)); - } - - /* 1st pass: consider cells with colspan 1 only */ - for (row_group = table->children; row_group; row_group =row_group->next) - for (row = row_group->children; row; row = row->next) - for (cell = row->children; cell; cell = cell->next) { - assert(cell->type == BOX_TABLE_CELL); - assert(cell->style); - /** TODO: Handle colspan="0" correctly. - * It's currently converted to 1 in box normaisation */ - assert(cell->columns != 0); - - if (cell->columns != 1) - continue; - - layout_minmax_block(cell, font_func); - i = cell->start_column; - - if (col[i].positioned) - continue; - - /* update column min, max widths using cell widths */ - if (col[i].min < cell->min_width) - col[i].min = cell->min_width; - if (col[i].max < cell->max_width) - col[i].max = cell->max_width; - } - - /* 2nd pass: cells which span multiple columns */ - for (row_group = table->children; row_group; row_group =row_group->next) - for (row = row_group->children; row; row = row->next) - for (cell = row->children; cell; cell = cell->next) { - unsigned int flexible_columns = 0; - int min = 0, max = 0, fixed_width = 0, extra; - - if (cell->columns == 1) - continue; - - layout_minmax_block(cell, font_func); - i = cell->start_column; - - /* find min width so far of spanned columns, and count - * number of non-fixed spanned columns and total fixed width */ - for (j = 0; j != cell->columns; j++) { - min += col[i + j].min; - if (col[i + j].type == COLUMN_WIDTH_FIXED) - fixed_width += col[i + j].width; - else - flexible_columns++; - } - min += (cell->columns - 1) * border_spacing_h; - - /* distribute extra min to spanned columns */ - if (min < cell->min_width) { - if (flexible_columns == 0) { - extra = 1 + (cell->min_width - min) / - cell->columns; - for (j = 0; j != cell->columns; j++) { - col[i + j].min += extra; - if (col[i + j].max < col[i + j].min) - col[i + j].max = col[i + j].min; - } - } else { - extra = 1 + (cell->min_width - min) / - flexible_columns; - for (j = 0; j != cell->columns; j++) { - if (col[i + j].type != - COLUMN_WIDTH_FIXED) { - col[i + j].min += extra; - if (col[i + j].max < - col[i + j].min) - col[i + j].max = - col[i + j].min; - } - } - } - } - - /* find max width so far of spanned columns */ - for (j = 0; j != cell->columns; j++) - max += col[i + j].max; - max += (cell->columns - 1) * border_spacing_h; - - /* distribute extra max to spanned columns */ - if (max < cell->max_width && flexible_columns) { - extra = 1 + (cell->max_width - max) / flexible_columns; - for (j = 0; j != cell->columns; j++) - if (col[i + j].type != COLUMN_WIDTH_FIXED) - col[i + j].max += extra; - } - } - - for (i = 0; i != table->columns; i++) { - if (col[i].max < col[i].min) { - box_dump(stderr, table, 0, true); - assert(0); - } - table_min += col[i].min; - table_max += col[i].max; - } - - /* fixed width takes priority, unless it is too narrow */ - wtype = css_computed_width(table->style, &value, &unit); - if (wtype == CSS_WIDTH_SET && unit != CSS_UNIT_PCT) { - int width = FIXTOINT(nscss_len2px(value, unit, table->style)); - if (table_min < width) - table_min = width; - if (table_max < width) - table_max = width; - } - - /* add margins, border, padding to min, max widths */ - calculate_mbp_width(table->style, LEFT, true, true, true, - &extra_fixed, &extra_frac); - calculate_mbp_width(table->style, RIGHT, true, true, true, - &extra_fixed, &extra_frac); - if (extra_fixed < 0) - extra_fixed = 0; - if (extra_frac < 0) - extra_frac = 0; - if (1.0 <= extra_frac) - extra_frac = 0.9; - table->min_width = (table_min + extra_fixed) / (1.0 - extra_frac); - table->max_width = (table_max + extra_fixed) / (1.0 - extra_frac); - table->min_width += (table->columns + 1) * border_spacing_h; - table->max_width += (table->columns + 1) * border_spacing_h; - - assert(0 <= table->min_width && table->min_width <= table->max_width); -} - - /** * Find a box's bounding box relative to itself, i.e. the box's border edge box * + * \param len_ctx Length conversion context * \param box box find bounding box of * \param desc_x0 updated to left of box's bbox * \param desc_y0 updated to top of box's bbox @@ -5103,9 +5167,11 @@ layout_minmax_table(struct box *table, const struct gui_layout_table *font_func) * \param desc_y1 updated to bottom of box's bbox */ static void -layout_get_box_bbox(struct box *box, - int *desc_x0, int *desc_y0, - int *desc_x1, int *desc_y1) +layout_get_box_bbox( + const nscss_len_ctx *len_ctx, + struct box *box, + int *desc_x0, int *desc_y0, + int *desc_x1, int *desc_y1) { *desc_x0 = -box->border[LEFT].width; *desc_y0 = -box->border[TOP].width; @@ -5125,7 +5191,8 @@ layout_get_box_bbox(struct box *box, int text_height; css_computed_font_size(box->style, &font_size, &font_unit); - text_height = nscss_len2px(font_size, font_unit, box->style); + text_height = nscss_len2px(len_ctx, font_size, font_unit, + box->style); text_height = FIXTOINT(text_height * 3 / 4); *desc_y0 = (*desc_y0 < -text_height) ? *desc_y0 : -text_height; } @@ -5135,16 +5202,19 @@ layout_get_box_bbox(struct box *box, /** * Apply changes to box descendant_[xy][01] values due to given child. * - * \param box box to update - * \param child a box, which may affect box's descendant bbox - * \param off_x offset to apply to child->x coord to treat as child of box - * \param off_y offset to apply to child->y coord to treat as child of box + * \param len_ctx Length conversion context + * \param box box to update + * \param child a box, which may affect box's descendant bbox + * \param off_x offset to apply to child->x coord to treat as child of box + * \param off_y offset to apply to child->y coord to treat as child of box */ static void -layout_update_descendant_bbox(struct box *box, - struct box *child, - int off_x, - int off_y) +layout_update_descendant_bbox( + const nscss_len_ctx *len_ctx, + struct box *box, + struct box *child, + int off_x, + int off_y) { int child_desc_x0, child_desc_y0, child_desc_x1, child_desc_y1; @@ -5164,7 +5234,8 @@ layout_update_descendant_bbox(struct box *box, } /* Get child's border edge */ - layout_get_box_bbox(child, &child_desc_x0, &child_desc_y0, + layout_get_box_bbox(len_ctx, child, + &child_desc_x0, &child_desc_y0, &child_desc_x1, &child_desc_y1); if (overflow_x == CSS_OVERFLOW_VISIBLE && @@ -5197,8 +5268,16 @@ layout_update_descendant_bbox(struct box *box, } -/* exported function documented in render/layout.h */ -void layout_calculate_descendant_bboxes(struct box *box) +/** + * Recursively calculate the descendant_[xy][01] values for a laid-out box tree + * and inform iframe browser windows of their size and position. + * + * \param len_ctx Length conversion context + * \param box tree of boxes to update + */ +static void layout_calculate_descendant_bboxes( + const nscss_len_ctx *len_ctx, + struct box *box) { struct box *child; @@ -5207,7 +5286,8 @@ void layout_calculate_descendant_bboxes(struct box *box) /* assert((box->width >= 0) && (box->height >= 0)); */ /* Initialise box's descendant box to border edge box */ - layout_get_box_bbox(box, &box->descendant_x0, &box->descendant_y0, + layout_get_box_bbox(len_ctx, box, + &box->descendant_x0, &box->descendant_y0, &box->descendant_x1, &box->descendant_y1); /* Extend it to contain HTML contents if box is replaced */ @@ -5240,7 +5320,7 @@ void layout_calculate_descendant_bboxes(struct box *box) child->type == BOX_FLOAT_RIGHT) continue; - layout_update_descendant_bbox(box, child, + layout_update_descendant_bbox(len_ctx, box, child, box->x, box->y); if (child == box->inline_end) @@ -5258,7 +5338,7 @@ void layout_calculate_descendant_bboxes(struct box *box) child->type == BOX_FLOAT_RIGHT) continue; - layout_calculate_descendant_bboxes(child); + layout_calculate_descendant_bboxes(len_ctx, child); if (box->style && css_computed_overflow_x(box->style) == CSS_OVERFLOW_HIDDEN && @@ -5266,22 +5346,73 @@ void layout_calculate_descendant_bboxes(struct box *box) CSS_OVERFLOW_HIDDEN) continue; - layout_update_descendant_bbox(box, child, 0, 0); + layout_update_descendant_bbox(len_ctx, box, child, 0, 0); } for (child = box->float_children; child; child = child->next_float) { assert(child->type == BOX_FLOAT_LEFT || child->type == BOX_FLOAT_RIGHT); - layout_calculate_descendant_bboxes(child); + layout_calculate_descendant_bboxes(len_ctx, child); - layout_update_descendant_bbox(box, child, 0, 0); + layout_update_descendant_bbox(len_ctx, box, child, 0, 0); } if (box->list_marker) { child = box->list_marker; - layout_calculate_descendant_bboxes(child); + layout_calculate_descendant_bboxes(len_ctx, child); - layout_update_descendant_bbox(box, child, 0, 0); + layout_update_descendant_bbox(len_ctx, box, child, 0, 0); } } + + +/* exported function documented in render/layout.h */ +bool layout_document(html_content *content, int width, int height) +{ + bool ret; + struct box *doc = content->layout; + const struct gui_layout_table *font_func = content->font_func; + + layout_minmax_block(doc, font_func, content); + + layout_block_find_dimensions(&content->len_ctx, + width, height, 0, 0, doc); + doc->x = doc->margin[LEFT] + doc->border[LEFT].width; + doc->y = doc->margin[TOP] + doc->border[TOP].width; + width -= doc->margin[LEFT] + doc->border[LEFT].width + + doc->padding[LEFT] + doc->padding[RIGHT] + + doc->border[RIGHT].width + doc->margin[RIGHT]; + if (width < 0) { + width = 0; + } + doc->width = width; + + ret = layout_block_context(doc, height, content); + + /* make <html> and <body> fill available height */ + if (doc->y + doc->padding[TOP] + doc->height + doc->padding[BOTTOM] + + doc->border[BOTTOM].width + doc->margin[BOTTOM] < + height) { + doc->height = height - (doc->y + doc->padding[TOP] + + doc->padding[BOTTOM] + + doc->border[BOTTOM].width + + doc->margin[BOTTOM]); + if (doc->children) + doc->children->height = doc->height - + (doc->children->margin[TOP] + + doc->children->border[TOP].width + + doc->children->padding[TOP] + + doc->children->padding[BOTTOM] + + doc->children->border[BOTTOM].width + + doc->children->margin[BOTTOM]); + } + + layout_lists(doc, font_func, &content->len_ctx); + layout_position_absolute(doc, doc, 0, 0, content); + layout_position_relative(&content->len_ctx, doc, doc, 0, 0); + + layout_calculate_descendant_bboxes(&content->len_ctx, doc); + + return ret; +} |