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Diffstat (limited to 'content/handlers/html/html_interaction.c')
| -rw-r--r-- | content/handlers/html/html_interaction.c | 1434 |
1 files changed, 1434 insertions, 0 deletions
diff --git a/content/handlers/html/html_interaction.c b/content/handlers/html/html_interaction.c new file mode 100644 index 000000000..898f55bc2 --- /dev/null +++ b/content/handlers/html/html_interaction.c @@ -0,0 +1,1434 @@ +/* + * Copyright 2006 James Bursa <bursa@users.sourceforge.net> + * Copyright 2006 Richard Wilson <info@tinct.net> + * Copyright 2008 Michael Drake <tlsa@netsurf-browser.org> + * Copyright 2009 Paul Blokus <paul_pl@users.sourceforge.net> + * + * This file is part of NetSurf, http://www.netsurf-browser.org/ + * + * NetSurf is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * NetSurf is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/** + * \file + * implementation of user interaction with a CONTENT_HTML. + */ + +#include <assert.h> +#include <stdbool.h> + +#include <dom/dom.h> + +#include "utils/corestrings.h" +#include "utils/messages.h" +#include "utils/utils.h" +#include "utils/log.h" +#include "utils/nsoption.h" +#include "netsurf/content.h" +#include "netsurf/browser_window.h" +#include "netsurf/mouse.h" +#include "netsurf/misc.h" +#include "netsurf/layout.h" +#include "netsurf/keypress.h" +#include "content/hlcache.h" +#include "desktop/frames.h" +#include "desktop/scrollbar.h" +#include "desktop/selection.h" +#include "desktop/textarea.h" +#include "javascript/js.h" +#include "desktop/gui_internal.h" + +#include "html/box.h" +#include "html/box_textarea.h" +#include "html/font.h" +#include "html/form_internal.h" +#include "html/html_internal.h" +#include "html/imagemap.h" +#include "html/search.h" + +/** + * Get pointer shape for given box + * + * \param box box in question + * \param imagemap whether an imagemap applies to the box + */ + +static browser_pointer_shape get_pointer_shape(struct box *box, bool imagemap) +{ + browser_pointer_shape pointer; + css_computed_style *style; + enum css_cursor_e cursor; + lwc_string **cursor_uris; + + if (box->type == BOX_FLOAT_LEFT || box->type == BOX_FLOAT_RIGHT) + style = box->children->style; + else + style = box->style; + + if (style == NULL) + return BROWSER_POINTER_DEFAULT; + + cursor = css_computed_cursor(style, &cursor_uris); + + switch (cursor) { + case CSS_CURSOR_AUTO: + if (box->href || (box->gadget && + (box->gadget->type == GADGET_IMAGE || + box->gadget->type == GADGET_SUBMIT)) || + imagemap) { + /* link */ + pointer = BROWSER_POINTER_POINT; + } else if (box->gadget && + (box->gadget->type == GADGET_TEXTBOX || + box->gadget->type == GADGET_PASSWORD || + box->gadget->type == GADGET_TEXTAREA)) { + /* text input */ + pointer = BROWSER_POINTER_CARET; + } else { + /* html content doesn't mind */ + pointer = BROWSER_POINTER_AUTO; + } + break; + case CSS_CURSOR_CROSSHAIR: + pointer = BROWSER_POINTER_CROSS; + break; + case CSS_CURSOR_POINTER: + pointer = BROWSER_POINTER_POINT; + break; + case CSS_CURSOR_MOVE: + pointer = BROWSER_POINTER_MOVE; + break; + case CSS_CURSOR_E_RESIZE: + pointer = BROWSER_POINTER_RIGHT; + break; + case CSS_CURSOR_W_RESIZE: + pointer = BROWSER_POINTER_LEFT; + break; + case CSS_CURSOR_N_RESIZE: + pointer = BROWSER_POINTER_UP; + break; + case CSS_CURSOR_S_RESIZE: + pointer = BROWSER_POINTER_DOWN; + break; + case CSS_CURSOR_NE_RESIZE: + pointer = BROWSER_POINTER_RU; + break; + case CSS_CURSOR_SW_RESIZE: + pointer = BROWSER_POINTER_LD; + break; + case CSS_CURSOR_SE_RESIZE: + pointer = BROWSER_POINTER_RD; + break; + case CSS_CURSOR_NW_RESIZE: + pointer = BROWSER_POINTER_LU; + break; + case CSS_CURSOR_TEXT: + pointer = BROWSER_POINTER_CARET; + break; + case CSS_CURSOR_WAIT: + pointer = BROWSER_POINTER_WAIT; + break; + case CSS_CURSOR_PROGRESS: + pointer = BROWSER_POINTER_PROGRESS; + break; + case CSS_CURSOR_HELP: + pointer = BROWSER_POINTER_HELP; + break; + default: + pointer = BROWSER_POINTER_DEFAULT; + break; + } + + return pointer; +} + + +/** + * Start drag scrolling the contents of a box + * + * \param box the box to be scrolled + * \param x x ordinate of initial mouse position + * \param y y ordinate + */ + +static void html_box_drag_start(struct box *box, int x, int y) +{ + int box_x, box_y; + int scroll_mouse_x, scroll_mouse_y; + + box_coords(box, &box_x, &box_y); + + if (box->scroll_x != NULL) { + scroll_mouse_x = x - box_x ; + scroll_mouse_y = y - (box_y + box->padding[TOP] + + box->height + box->padding[BOTTOM] - + SCROLLBAR_WIDTH); + scrollbar_start_content_drag(box->scroll_x, + scroll_mouse_x, scroll_mouse_y); + } else if (box->scroll_y != NULL) { + scroll_mouse_x = x - (box_x + box->padding[LEFT] + + box->width + box->padding[RIGHT] - + SCROLLBAR_WIDTH); + scroll_mouse_y = y - box_y; + + scrollbar_start_content_drag(box->scroll_y, + scroll_mouse_x, scroll_mouse_y); + } +} + + +/** + * End overflow scroll scrollbar drags + * + * \param html html content + * \param mouse state of mouse buttons and modifier keys + * \param x coordinate of mouse + * \param y coordinate of mouse + * \param dir Direction of drag + */ +static size_t html_selection_drag_end(struct html_content *html, + browser_mouse_state mouse, int x, int y, int dir) +{ + int pixel_offset; + struct box *box; + int dx, dy; + size_t idx = 0; + + box = box_pick_text_box(html, x, y, dir, &dx, &dy); + if (box) { + plot_font_style_t fstyle; + + font_plot_style_from_css(&html->len_ctx, box->style, &fstyle); + + guit->layout->position(&fstyle, box->text, box->length, + dx, &idx, &pixel_offset); + + idx += box->byte_offset; + } + + return idx; +} + + +/** + * Handle mouse tracking (including drags) in an HTML content window. + * + * \param c content of type html + * \param bw browser window + * \param mouse state of mouse buttons and modifier keys + * \param x coordinate of mouse + * \param y coordinate of mouse + */ + +void html_mouse_track(struct content *c, struct browser_window *bw, + browser_mouse_state mouse, int x, int y) +{ + html_mouse_action(c, bw, mouse, x, y); +} + +/** + * Helper for file gadgets to store their filename. + * + * Stores the filename unencoded on the dom node associated with the + * gadget. + * + * \todo Get rid of this crap eventually + * + * \param operation DOM operation + * \param key DOM node key being considerd + * \param _data The data assocated with the key + * \param src The source DOM node. + * \param dst The destination DOM node. + */ +static void +html__image_coords_dom_user_data_handler(dom_node_operation operation, + dom_string *key, + void *_data, + struct dom_node *src, + struct dom_node *dst) +{ + struct image_input_coords *oldcoords, *coords = _data, *newcoords; + + if (!dom_string_isequal(corestring_dom___ns_key_image_coords_node_data, + key) || coords == NULL) { + return; + } + + switch (operation) { + case DOM_NODE_CLONED: + newcoords = calloc(1, sizeof(*newcoords)); + if (newcoords != NULL) { + *newcoords = *coords; + if (dom_node_set_user_data(dst, + corestring_dom___ns_key_image_coords_node_data, + newcoords, + html__image_coords_dom_user_data_handler, + &oldcoords) == DOM_NO_ERR) { + free(oldcoords); + } + } + break; + + case DOM_NODE_DELETED: + free(coords); + break; + + case DOM_NODE_RENAMED: + case DOM_NODE_IMPORTED: + case DOM_NODE_ADOPTED: + break; + + default: + NSLOG(netsurf, INFO, "User data operation not handled."); + assert(0); + } +} + +/** + * Handle mouse clicks and movements in an HTML content window. + * + * \param c content of type html + * \param bw browser window + * \param mouse state of mouse buttons and modifier keys + * \param x coordinate of mouse + * \param y coordinate of mouse + * + * This function handles both hovering and clicking. It is important that the + * code path is identical (except that hovering doesn't carry out the action), + * so that the status bar reflects exactly what will happen. Having separate + * code paths opens the possibility that an attacker will make the status bar + * show some harmless action where clicking will be harmful. + */ + +void html_mouse_action(struct content *c, struct browser_window *bw, + browser_mouse_state mouse, int x, int y) +{ + html_content *html = (html_content *) c; + enum { ACTION_NONE, ACTION_SUBMIT, ACTION_GO } action = ACTION_NONE; + const char *title = 0; + nsurl *url = 0; + char *url_s = NULL; + size_t url_l = 0; + const char *target = 0; + char status_buffer[200]; + const char *status = 0; + browser_pointer_shape pointer = BROWSER_POINTER_DEFAULT; + bool imagemap = false; + int box_x = 0, box_y = 0; + int gadget_box_x = 0, gadget_box_y = 0; + int html_object_pos_x = 0, html_object_pos_y = 0; + int text_box_x = 0; + struct box *url_box = 0; + struct box *gadget_box = 0; + struct box *text_box = 0; + struct box *box; + struct form_control *gadget = 0; + hlcache_handle *object = NULL; + struct box *html_object_box = NULL; + struct browser_window *iframe = NULL; + struct box *drag_candidate = NULL; + struct scrollbar *scrollbar = NULL; + plot_font_style_t fstyle; + int scroll_mouse_x = 0, scroll_mouse_y = 0; + int padding_left, padding_right, padding_top, padding_bottom; + browser_drag_type drag_type = browser_window_get_drag_type(bw); + union content_msg_data msg_data; + struct dom_node *node = NULL; + union html_drag_owner drag_owner; + union html_selection_owner sel_owner; + bool click = mouse & (BROWSER_MOUSE_PRESS_1 | BROWSER_MOUSE_PRESS_2 | + BROWSER_MOUSE_CLICK_1 | BROWSER_MOUSE_CLICK_2 | + BROWSER_MOUSE_DRAG_1 | BROWSER_MOUSE_DRAG_2); + + if (drag_type != DRAGGING_NONE && !mouse && + html->visible_select_menu != NULL) { + /* drag end: select menu */ + form_select_mouse_drag_end(html->visible_select_menu, + mouse, x, y); + } + + if (html->visible_select_menu != NULL) { + box = html->visible_select_menu->box; + box_coords(box, &box_x, &box_y); + + box_x -= box->border[LEFT].width; + box_y += box->height + box->border[BOTTOM].width + + box->padding[BOTTOM] + box->padding[TOP]; + status = form_select_mouse_action(html->visible_select_menu, + mouse, x - box_x, y - box_y); + if (status != NULL) { + msg_data.explicit_status_text = status; + content_broadcast(c, CONTENT_MSG_STATUS, &msg_data); + } else { + int width, height; + form_select_get_dimensions(html->visible_select_menu, + &width, &height); + html->visible_select_menu = NULL; + browser_window_redraw_rect(bw, box_x, box_y, + width, height); + } + return; + } + + if (html->drag_type == HTML_DRAG_SELECTION) { + /* Selection drag */ + struct box *box; + int dir = -1; + int dx, dy; + + if (!mouse) { + /* End of selection drag */ + int dir = -1; + size_t idx; + + if (selection_dragging_start(&html->sel)) + dir = 1; + + idx = html_selection_drag_end(html, mouse, x, y, dir); + + if (idx != 0) + selection_track(&html->sel, mouse, idx); + + drag_owner.no_owner = true; + html_set_drag_type(html, HTML_DRAG_NONE, + drag_owner, NULL); + return; + } + + if (selection_dragging_start(&html->sel)) + dir = 1; + + box = box_pick_text_box(html, x, y, dir, &dx, &dy); + + if (box != NULL) { + int pixel_offset; + size_t idx; + plot_font_style_t fstyle; + + font_plot_style_from_css(&html->len_ctx, + box->style, &fstyle); + + guit->layout->position(&fstyle, + box->text, box->length, + dx, &idx, &pixel_offset); + + selection_track(&html->sel, mouse, + box->byte_offset + idx); + } + return; + } + + if (html->drag_type == HTML_DRAG_SCROLLBAR) { + struct scrollbar *scr = html->drag_owner.scrollbar; + struct html_scrollbar_data *data = scrollbar_get_data(scr); + + if (!mouse) { + /* drag end: scrollbar */ + html_overflow_scroll_drag_end(scr, mouse, x, y); + } + + box = data->box; + box_coords(box, &box_x, &box_y); + if (scrollbar_is_horizontal(scr)) { + scroll_mouse_x = x - box_x ; + scroll_mouse_y = y - (box_y + box->padding[TOP] + + box->height + box->padding[BOTTOM] - + SCROLLBAR_WIDTH); + status = scrollbar_mouse_status_to_message( + scrollbar_mouse_action(scr, mouse, + scroll_mouse_x, + scroll_mouse_y)); + } else { + scroll_mouse_x = x - (box_x + box->padding[LEFT] + + box->width + box->padding[RIGHT] - + SCROLLBAR_WIDTH); + scroll_mouse_y = y - box_y; + status = scrollbar_mouse_status_to_message( + scrollbar_mouse_action(scr, mouse, + scroll_mouse_x, + scroll_mouse_y)); + } + + msg_data.explicit_status_text = status; + content_broadcast(c, CONTENT_MSG_STATUS, &msg_data); + return; + } + + if (html->drag_type == HTML_DRAG_TEXTAREA_SELECTION || + html->drag_type == HTML_DRAG_TEXTAREA_SCROLLBAR) { + box = html->drag_owner.textarea; + assert(box->gadget != NULL); + assert(box->gadget->type == GADGET_TEXTAREA || + box->gadget->type == GADGET_PASSWORD || + box->gadget->type == GADGET_TEXTBOX); + + box_coords(box, &box_x, &box_y); + textarea_mouse_action(box->gadget->data.text.ta, mouse, + x - box_x, y - box_y); + + /* TODO: Set appropriate statusbar message */ + return; + } + + if (html->drag_type == HTML_DRAG_CONTENT_SELECTION || + html->drag_type == HTML_DRAG_CONTENT_SCROLL) { + box = html->drag_owner.content; + assert(box->object != NULL); + + box_coords(box, &box_x, &box_y); + content_mouse_track(box->object, bw, mouse, + x - box_x, y - box_y); + return; + } + + if (html->drag_type == HTML_DRAG_CONTENT_SELECTION) { + box = html->drag_owner.content; + assert(box->object != NULL); + + box_coords(box, &box_x, &box_y); + content_mouse_track(box->object, bw, mouse, + x - box_x, y - box_y); + return; + } + + /* Content related drags handled by now */ + assert(html->drag_type == HTML_DRAG_NONE); + + /* search the box tree for a link, imagemap, form control, or + * box with scrollbars + */ + + box = html->layout; + + /* Consider the margins of the html page now */ + box_x = box->margin[LEFT]; + box_y = box->margin[TOP]; + + /* descend through visible boxes setting more specific values for: + * box - deepest box at point + * html_object_box - html object + * html_object_pos_x - html object + * html_object_pos_y - html object + * object - non html object + * iframe - iframe + * url - href or imagemap + * target - href or imagemap or gadget + * url_box - href or imagemap + * imagemap - imagemap + * gadget - gadget + * gadget_box - gadget + * gadget_box_x - gadget + * gadget_box_y - gadget + * title - title + * pointer + * + * drag_candidate - first box with scroll + * padding_left - box with scroll + * padding_right + * padding_top + * padding_bottom + * scrollbar - inside padding box stops decent + * scroll_mouse_x - inside padding box stops decent + * scroll_mouse_y - inside padding box stops decent + * + * text_box - text box + * text_box_x - text_box + */ + do { + if ((box->style != NULL) && + (css_computed_visibility(box->style) == + CSS_VISIBILITY_HIDDEN)) { + continue; + } + + if (box->node != NULL) { + node = box->node; + } + + if (box->object) { + if (content_get_type(box->object) == CONTENT_HTML) { + html_object_box = box; + html_object_pos_x = box_x; + html_object_pos_y = box_y; + } else { + object = box->object; + } + } + + if (box->iframe) { + iframe = box->iframe; + } + + if (box->href) { + url = box->href; + target = box->target; + url_box = box; + } + + if (box->usemap) { + url = imagemap_get(html, box->usemap, + box_x, box_y, x, y, &target); + if (url) { + imagemap = true; + url_box = box; + } + } + + if (box->gadget) { + gadget = box->gadget; + gadget_box = box; + gadget_box_x = box_x; + gadget_box_y = box_y; + if (gadget->form) + target = gadget->form->target; + } + + if (box->title) { + title = box->title; + } + + pointer = get_pointer_shape(box, false); + + if ((box->scroll_x != NULL) || + (box->scroll_y != NULL)) { + + if (drag_candidate == NULL) { + drag_candidate = box; + } + + padding_left = box_x + + scrollbar_get_offset(box->scroll_x); + padding_right = padding_left + box->padding[LEFT] + + box->width + box->padding[RIGHT]; + padding_top = box_y + + scrollbar_get_offset(box->scroll_y); + padding_bottom = padding_top + box->padding[TOP] + + box->height + box->padding[BOTTOM]; + + if ((x > padding_left) && + (x < padding_right) && + (y > padding_top) && + (y < padding_bottom)) { + /* mouse inside padding box */ + + if ((box->scroll_y != NULL) && + (x > (padding_right - + SCROLLBAR_WIDTH))) { + /* mouse above vertical box scroll */ + + scrollbar = box->scroll_y; + scroll_mouse_x = x - (padding_right - + SCROLLBAR_WIDTH); + scroll_mouse_y = y - padding_top; + break; + + } else if ((box->scroll_x != NULL) && + (y > (padding_bottom - + SCROLLBAR_WIDTH))) { + /* mouse above horizontal box scroll */ + + scrollbar = box->scroll_x; + scroll_mouse_x = x - padding_left; + scroll_mouse_y = y - (padding_bottom - + SCROLLBAR_WIDTH); + break; + } + } + } + + if (box->text && !box->object) { + text_box = box; + text_box_x = box_x; + } + } while ((box = box_at_point(&html->len_ctx, box, x, y, + &box_x, &box_y)) != NULL); + + /* use of box_x, box_y, or content below this point is probably a + * mistake; they will refer to the last box returned by box_at_point */ + assert(node != NULL); + + if (scrollbar) { + status = scrollbar_mouse_status_to_message( + scrollbar_mouse_action(scrollbar, mouse, + scroll_mouse_x, + scroll_mouse_y)); + pointer = BROWSER_POINTER_DEFAULT; + } else if (gadget) { + textarea_mouse_status ta_status; + + switch (gadget->type) { + case GADGET_SELECT: + status = messages_get("FormSelect"); + pointer = BROWSER_POINTER_MENU; + if (mouse & BROWSER_MOUSE_CLICK_1 && + nsoption_bool(core_select_menu)) { + html->visible_select_menu = gadget; + form_open_select_menu(c, gadget, + form_select_menu_callback, + c); + pointer = BROWSER_POINTER_DEFAULT; + } else if (mouse & BROWSER_MOUSE_CLICK_1) { + msg_data.select_menu.gadget = gadget; + content_broadcast(c, CONTENT_MSG_SELECTMENU, + &msg_data); + } + break; + case GADGET_CHECKBOX: + status = messages_get("FormCheckbox"); + if (mouse & BROWSER_MOUSE_CLICK_1) { + gadget->selected = !gadget->selected; + dom_html_input_element_set_checked( + (dom_html_input_element *)(gadget->node), + gadget->selected); + html__redraw_a_box(html, gadget_box); + } + break; + case GADGET_RADIO: + status = messages_get("FormRadio"); + if (mouse & BROWSER_MOUSE_CLICK_1) + form_radio_set(gadget); + break; + case GADGET_IMAGE: + /* This falls through to SUBMIT */ + if (mouse & BROWSER_MOUSE_CLICK_1) { + struct image_input_coords *coords, *oldcoords; + /** \todo Find a way to not ignore errors */ + coords = calloc(1, sizeof(*coords)); + if (coords == NULL) { + return; + } + coords->x = x - gadget_box_x; + coords->y = y - gadget_box_y; + if (dom_node_set_user_data( + gadget->node, + corestring_dom___ns_key_image_coords_node_data, + coords, html__image_coords_dom_user_data_handler, + &oldcoords) != DOM_NO_ERR) + return; + free(oldcoords); + } + /* Fall through */ + case GADGET_SUBMIT: + if (gadget->form) { + snprintf(status_buffer, sizeof status_buffer, + messages_get("FormSubmit"), + gadget->form->action); + status = status_buffer; + pointer = get_pointer_shape(gadget_box, false); + if (mouse & (BROWSER_MOUSE_CLICK_1 | + BROWSER_MOUSE_CLICK_2)) + action = ACTION_SUBMIT; + } else { + status = messages_get("FormBadSubmit"); + } + break; + case GADGET_TEXTBOX: + case GADGET_PASSWORD: + case GADGET_TEXTAREA: + if (gadget->type == GADGET_TEXTAREA) + status = messages_get("FormTextarea"); + else + status = messages_get("FormTextbox"); + + if (click && (html->selection_type != + HTML_SELECTION_TEXTAREA || + html->selection_owner.textarea != + gadget_box)) { + sel_owner.none = true; + html_set_selection(html, HTML_SELECTION_NONE, + sel_owner, true); + } + + ta_status = textarea_mouse_action(gadget->data.text.ta, + mouse, x - gadget_box_x, + y - gadget_box_y); + + if (ta_status & TEXTAREA_MOUSE_EDITOR) { + pointer = get_pointer_shape(gadget_box, false); + } else { + pointer = BROWSER_POINTER_DEFAULT; + status = scrollbar_mouse_status_to_message( + ta_status >> 3); + } + break; + case GADGET_HIDDEN: + /* not possible: no box generated */ + break; + case GADGET_RESET: + status = messages_get("FormReset"); + break; + case GADGET_FILE: + status = messages_get("FormFile"); + if (mouse & BROWSER_MOUSE_CLICK_1) { + msg_data.gadget_click.gadget = gadget; + content_broadcast(c, CONTENT_MSG_GADGETCLICK, + &msg_data); + } + break; + case GADGET_BUTTON: + /* This gadget cannot be activated */ + status = messages_get("FormButton"); + break; + } + + } else if (object && (mouse & BROWSER_MOUSE_MOD_2)) { + + if (mouse & BROWSER_MOUSE_DRAG_2) { + msg_data.dragsave.type = CONTENT_SAVE_NATIVE; + msg_data.dragsave.content = object; + content_broadcast(c, CONTENT_MSG_DRAGSAVE, &msg_data); + + } else if (mouse & BROWSER_MOUSE_DRAG_1) { + msg_data.dragsave.type = CONTENT_SAVE_ORIG; + msg_data.dragsave.content = object; + content_broadcast(c, CONTENT_MSG_DRAGSAVE, &msg_data); + } + + /* \todo should have a drag-saving object msg */ + + } else if (iframe) { + int pos_x, pos_y; + float scale = browser_window_get_scale(bw); + + browser_window_get_position(iframe, false, &pos_x, &pos_y); + + pos_x /= scale; + pos_y /= scale; + + if (mouse & BROWSER_MOUSE_CLICK_1 || + mouse & BROWSER_MOUSE_CLICK_2) { + browser_window_mouse_click(iframe, mouse, + x - pos_x, y - pos_y); + } else { + browser_window_mouse_track(iframe, mouse, + x - pos_x, y - pos_y); + } + } else if (html_object_box) { + + if (click && (html->selection_type != HTML_SELECTION_CONTENT || + html->selection_owner.content != + html_object_box)) { + sel_owner.none = true; + html_set_selection(html, HTML_SELECTION_NONE, + sel_owner, true); + } + if (mouse & BROWSER_MOUSE_CLICK_1 || + mouse & BROWSER_MOUSE_CLICK_2) { + content_mouse_action(html_object_box->object, + bw, mouse, + x - html_object_pos_x, + y - html_object_pos_y); + } else { + content_mouse_track(html_object_box->object, + bw, mouse, + x - html_object_pos_x, + y - html_object_pos_y); + } + } else if (url) { + if (nsoption_bool(display_decoded_idn) == true) { + if (nsurl_get_utf8(url, &url_s, &url_l) != NSERROR_OK) { + /* Unable to obtain a decoded IDN. This is not a fatal error. + * Ensure the string pointer is NULL so we use the encoded version. */ + url_s = NULL; + } + } + + if (title) { + snprintf(status_buffer, sizeof status_buffer, "%s: %s", + url_s ? url_s : nsurl_access(url), title); + } else { + snprintf(status_buffer, sizeof status_buffer, "%s", + url_s ? url_s : nsurl_access(url)); + } + + status = status_buffer; + + if (url_s != NULL) + free(url_s); + + pointer = get_pointer_shape(url_box, imagemap); + + if (mouse & BROWSER_MOUSE_CLICK_1 && + mouse & BROWSER_MOUSE_MOD_1) { + /* force download of link */ + browser_window_navigate(bw, + url, + content_get_url(c), + BW_NAVIGATE_DOWNLOAD, + NULL, + NULL, + NULL); + + } else if (mouse & BROWSER_MOUSE_CLICK_2 && + mouse & BROWSER_MOUSE_MOD_1) { + msg_data.savelink.url = url; + msg_data.savelink.title = title; + content_broadcast(c, CONTENT_MSG_SAVELINK, &msg_data); + + } else if (mouse & (BROWSER_MOUSE_CLICK_1 | + BROWSER_MOUSE_CLICK_2)) + action = ACTION_GO; + } else { + bool done = false; + + /* frame resizing */ + if (browser_window_frame_resize_start(bw, mouse, x, y, + &pointer)) { + if (mouse & (BROWSER_MOUSE_DRAG_1 | + BROWSER_MOUSE_DRAG_2)) { + status = messages_get("FrameDrag"); + } + done = true; + } + + /* if clicking in the main page, remove the selection from any + * text areas */ + if (!done) { + + if (click && html->focus_type != HTML_FOCUS_SELF) { + union html_focus_owner fo; + fo.self = true; + html_set_focus(html, HTML_FOCUS_SELF, fo, + true, 0, 0, 0, NULL); + } + if (click && html->selection_type != + HTML_SELECTION_SELF) { + sel_owner.none = true; + html_set_selection(html, HTML_SELECTION_NONE, + sel_owner, true); + } + + if (text_box) { + int pixel_offset; + size_t idx; + + font_plot_style_from_css(&html->len_ctx, + text_box->style, &fstyle); + + guit->layout->position(&fstyle, + text_box->text, + text_box->length, + x - text_box_x, + &idx, + &pixel_offset); + + if (selection_click(&html->sel, mouse, + text_box->byte_offset + idx)) { + /* key presses must be directed at the + * main browser window, paste text + * operations ignored */ + html_drag_type drag_type; + union html_drag_owner drag_owner; + + if (selection_dragging(&html->sel)) { + drag_type = HTML_DRAG_SELECTION; + drag_owner.no_owner = true; + html_set_drag_type(html, + drag_type, + drag_owner, + NULL); + status = messages_get( + "Selecting"); + } + + done = true; + } + + } else if (mouse & BROWSER_MOUSE_PRESS_1) { + sel_owner.none = true; + selection_clear(&html->sel, true); + } + + if (selection_defined(&html->sel)) { + sel_owner.none = false; + html_set_selection(html, HTML_SELECTION_SELF, + sel_owner, true); + } else if (click && html->selection_type != + HTML_SELECTION_NONE) { + sel_owner.none = true; + html_set_selection(html, HTML_SELECTION_NONE, + sel_owner, true); + } + } + + if (!done) { + if (title) + status = title; + + if (mouse & BROWSER_MOUSE_DRAG_1) { + if (mouse & BROWSER_MOUSE_MOD_2) { + msg_data.dragsave.type = + CONTENT_SAVE_COMPLETE; + msg_data.dragsave.content = NULL; + content_broadcast(c, + CONTENT_MSG_DRAGSAVE, + &msg_data); + } else { + if (drag_candidate == NULL) { + browser_window_page_drag_start( + bw, x, y); + } else { + html_box_drag_start( + drag_candidate, + x, y); + } + pointer = BROWSER_POINTER_MOVE; + } + } + else if (mouse & BROWSER_MOUSE_DRAG_2) { + if (mouse & BROWSER_MOUSE_MOD_2) { + msg_data.dragsave.type = + CONTENT_SAVE_SOURCE; + msg_data.dragsave.content = NULL; + content_broadcast(c, + CONTENT_MSG_DRAGSAVE, + &msg_data); + } else { + if (drag_candidate == NULL) { + browser_window_page_drag_start( + bw, x, y); + } else { + html_box_drag_start( + drag_candidate, + x, y); + } + pointer = BROWSER_POINTER_MOVE; + } + } + } + if (mouse && mouse < BROWSER_MOUSE_MOD_1) { + /* ensure key presses still act on the browser window */ + union html_focus_owner fo; + fo.self = true; + html_set_focus(html, HTML_FOCUS_SELF, fo, + true, 0, 0, 0, NULL); + } + } + + if (!iframe && !html_object_box) { + msg_data.explicit_status_text = status; + content_broadcast(c, CONTENT_MSG_STATUS, &msg_data); + + msg_data.pointer = pointer; + content_broadcast(c, CONTENT_MSG_POINTER, &msg_data); + } + + /* fire dom click event */ + if (mouse & BROWSER_MOUSE_CLICK_1) { + fire_dom_event(corestring_dom_click, node, true, true); + } + + /* deferred actions that can cause this browser_window to be destroyed + * and must therefore be done after set_status/pointer + */ + switch (action) { + case ACTION_SUBMIT: + form_submit(content_get_url(c), + browser_window_find_target(bw, target, mouse), + gadget->form, gadget); + break; + case ACTION_GO: + browser_window_navigate(browser_window_find_target(bw, target, mouse), + url, + content_get_url(c), + BW_NAVIGATE_HISTORY, + NULL, + NULL, + NULL); + break; + case ACTION_NONE: + break; + } +} + + +/** + * Handle keypresses. + * + * \param c content of type HTML + * \param key The UCS4 character codepoint + * \return true if key handled, false otherwise + */ + +bool html_keypress(struct content *c, uint32_t key) +{ + html_content *html = (html_content *) c; + struct selection *sel = &html->sel; + struct box *box; + + switch (html->focus_type) { + case HTML_FOCUS_CONTENT: + box = html->focus_owner.content; + return content_keypress(box->object, key); + + case HTML_FOCUS_TEXTAREA: + box = html->focus_owner.textarea; + return box_textarea_keypress(html, box, key); + + default: + /* Deal with it below */ + break; + } + + switch (key) { + case NS_KEY_COPY_SELECTION: + selection_copy_to_clipboard(sel); + return true; + + case NS_KEY_CLEAR_SELECTION: + selection_clear(sel, true); + return true; + + case NS_KEY_SELECT_ALL: + selection_select_all(sel); + return true; + + case NS_KEY_ESCAPE: + if (selection_defined(sel)) { + selection_clear(sel, true); + return true; + } + + /* if there's no selection, leave Escape for the caller */ + return false; + } + + return false; +} + + +/** + * Handle search. + * + * \param c content of type HTML + * \param context front end private data + * \param flags search flags + * \param string search string + */ +void html_search(struct content *c, void *context, + search_flags_t flags, const char *string) +{ + html_content *html = (html_content *)c; + + assert(c != NULL); + + if (string != NULL && html->search_string != NULL && + strcmp(string, html->search_string) == 0 && + html->search != NULL) { + /* Continue prev. search */ + search_step(html->search, flags, string); + + } else if (string != NULL) { + /* New search */ + free(html->search_string); + html->search_string = strdup(string); + if (html->search_string == NULL) + return; + + if (html->search != NULL) { + search_destroy_context(html->search); + html->search = NULL; + } + + html->search = search_create_context(c, CONTENT_HTML, context); + + if (html->search == NULL) + return; + + search_step(html->search, flags, string); + + } else { + /* Clear search */ + html_search_clear(c); + + free(html->search_string); + html->search_string = NULL; + } +} + + +/** + * Terminate a search. + * + * \param c content of type HTML + */ +void html_search_clear(struct content *c) +{ + html_content *html = (html_content *)c; + + assert(c != NULL); + + free(html->search_string); + html->search_string = NULL; + + if (html->search != NULL) { + search_destroy_context(html->search); + } + html->search = NULL; +} + + +/** + * Callback for in-page scrollbars. + */ +void html_overflow_scroll_callback(void *client_data, + struct scrollbar_msg_data *scrollbar_data) +{ + struct html_scrollbar_data *data = client_data; + html_content *html = (html_content *)data->c; + struct box *box = data->box; + union content_msg_data msg_data; + html_drag_type drag_type; + union html_drag_owner drag_owner; + + switch(scrollbar_data->msg) { + case SCROLLBAR_MSG_MOVED: + + if (html->reflowing == true) { + /* Can't redraw during layout, and it will + * be redrawn after layout anyway. */ + break; + } + + html__redraw_a_box(html, box); + break; + case SCROLLBAR_MSG_SCROLL_START: + { + struct rect rect = { + .x0 = scrollbar_data->x0, + .y0 = scrollbar_data->y0, + .x1 = scrollbar_data->x1, + .y1 = scrollbar_data->y1 + }; + drag_type = HTML_DRAG_SCROLLBAR; + drag_owner.scrollbar = scrollbar_data->scrollbar; + html_set_drag_type(html, drag_type, drag_owner, &rect); + } + break; + case SCROLLBAR_MSG_SCROLL_FINISHED: + drag_type = HTML_DRAG_NONE; + drag_owner.no_owner = true; + html_set_drag_type(html, drag_type, drag_owner, NULL); + + msg_data.pointer = BROWSER_POINTER_AUTO; + content_broadcast(data->c, CONTENT_MSG_POINTER, &msg_data); + break; + } +} + + +/** + * End overflow scroll scrollbar drags + * + * \param scrollbar scrollbar widget + * \param mouse state of mouse buttons and modifier keys + * \param x coordinate of mouse + * \param y coordinate of mouse + */ +void html_overflow_scroll_drag_end(struct scrollbar *scrollbar, + browser_mouse_state mouse, int x, int y) +{ + int scroll_mouse_x, scroll_mouse_y, box_x, box_y; + struct html_scrollbar_data *data = scrollbar_get_data(scrollbar); + struct box *box; + + box = data->box; + box_coords(box, &box_x, &box_y); + + if (scrollbar_is_horizontal(scrollbar)) { + scroll_mouse_x = x - box_x; + scroll_mouse_y = y - (box_y + box->padding[TOP] + + box->height + box->padding[BOTTOM] - + SCROLLBAR_WIDTH); + scrollbar_mouse_drag_end(scrollbar, mouse, + scroll_mouse_x, scroll_mouse_y); + } else { + scroll_mouse_x = x - (box_x + box->padding[LEFT] + + box->width + box->padding[RIGHT] - + SCROLLBAR_WIDTH); + scroll_mouse_y = y - box_y; + scrollbar_mouse_drag_end(scrollbar, mouse, + scroll_mouse_x, scroll_mouse_y); + } +} + +/* Documented in html_internal.h */ +void html_set_drag_type(html_content *html, html_drag_type drag_type, + union html_drag_owner drag_owner, const struct rect *rect) +{ + union content_msg_data msg_data; + + assert(html != NULL); + + html->drag_type = drag_type; + html->drag_owner = drag_owner; + + switch (drag_type) { + case HTML_DRAG_NONE: + assert(drag_owner.no_owner == true); + msg_data.drag.type = CONTENT_DRAG_NONE; + break; + + case HTML_DRAG_SCROLLBAR: + case HTML_DRAG_TEXTAREA_SCROLLBAR: + case HTML_DRAG_CONTENT_SCROLL: + msg_data.drag.type = CONTENT_DRAG_SCROLL; + break; + + case HTML_DRAG_SELECTION: + assert(drag_owner.no_owner == true); + /* Fall through */ + case HTML_DRAG_TEXTAREA_SELECTION: + case HTML_DRAG_CONTENT_SELECTION: + msg_data.drag.type = CONTENT_DRAG_SELECTION; + break; + } + msg_data.drag.rect = rect; + + /* Inform of the content's drag status change */ + content_broadcast((struct content *)html, CONTENT_MSG_DRAG, &msg_data); +} + +/* Documented in html_internal.h */ +void html_set_focus(html_content *html, html_focus_type focus_type, + union html_focus_owner focus_owner, bool hide_caret, + int x, int y, int height, const struct rect *clip) +{ + union content_msg_data msg_data; + int x_off = 0; + int y_off = 0; + struct rect cr; + bool textarea_lost_focus = html->focus_type == HTML_FOCUS_TEXTAREA && + focus_type != HTML_FOCUS_TEXTAREA; + + assert(html != NULL); + + switch (focus_type) { + case HTML_FOCUS_SELF: + assert(focus_owner.self == true); + if (html->focus_type == HTML_FOCUS_SELF) + /* Don't need to tell anyone anything */ + return; + break; + + case HTML_FOCUS_CONTENT: + box_coords(focus_owner.content, &x_off, &y_off); + break; + + case HTML_FOCUS_TEXTAREA: + box_coords(focus_owner.textarea, &x_off, &y_off); + break; + } + + html->focus_type = focus_type; + html->focus_owner = focus_owner; + + if (textarea_lost_focus) { + msg_data.caret.type = CONTENT_CARET_REMOVE; + } else if (focus_type != HTML_FOCUS_SELF && hide_caret) { + msg_data.caret.type = CONTENT_CARET_HIDE; + } else { + if (clip != NULL) { + cr = *clip; + cr.x0 += x_off; + cr.y0 += y_off; + cr.x1 += x_off; + cr.y1 += y_off; + } + + msg_data.caret.type = CONTENT_CARET_SET_POS; + msg_data.caret.pos.x = x + x_off; + msg_data.caret.pos.y = y + y_off; + msg_data.caret.pos.height = height; + msg_data.caret.pos.clip = (clip == NULL) ? NULL : &cr; + } + + /* Inform of the content's drag status change */ + content_broadcast((struct content *)html, CONTENT_MSG_CARET, &msg_data); +} + +/* Documented in html_internal.h */ +void html_set_selection(html_content *html, html_selection_type selection_type, + union html_selection_owner selection_owner, bool read_only) +{ + union content_msg_data msg_data; + struct box *box; + bool changed = false; + bool same_type = html->selection_type == selection_type; + + assert(html != NULL); + + if ((selection_type == HTML_SELECTION_NONE && + html->selection_type != HTML_SELECTION_NONE) || + (selection_type != HTML_SELECTION_NONE && + html->selection_type == HTML_SELECTION_NONE)) + /* Existance of selection has changed, and we'll need to + * inform our owner */ + changed = true; + + /* Clear any existing selection */ + if (html->selection_type != HTML_SELECTION_NONE) { + switch (html->selection_type) { + case HTML_SELECTION_SELF: + if (same_type) + break; + selection_clear(&html->sel, true); + break; + case HTML_SELECTION_TEXTAREA: + if (same_type && html->selection_owner.textarea == + selection_owner.textarea) + break; + box = html->selection_owner.textarea; + textarea_clear_selection(box->gadget->data.text.ta); + break; + case HTML_SELECTION_CONTENT: + if (same_type && html->selection_owner.content == + selection_owner.content) + break; + box = html->selection_owner.content; + content_clear_selection(box->object); + break; + default: + break; + } + } + + html->selection_type = selection_type; + html->selection_owner = selection_owner; + + if (!changed) + /* Don't need to report lack of change to owner */ + return; + + /* Prepare msg */ + switch (selection_type) { + case HTML_SELECTION_NONE: + assert(selection_owner.none == true); + msg_data.selection.selection = false; + break; + case HTML_SELECTION_SELF: + assert(selection_owner.none == false); + /* fall through */ + case HTML_SELECTION_TEXTAREA: + case HTML_SELECTION_CONTENT: + msg_data.selection.selection = true; + break; + default: + break; + } + msg_data.selection.read_only = read_only; + + /* Inform of the content's selection status change */ + content_broadcast((struct content *)html, CONTENT_MSG_SELECTION, + &msg_data); +} |