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-rw-r--r--frontends/monkey/layout.c117
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diff --git a/frontends/monkey/layout.c b/frontends/monkey/layout.c
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+/*
+ * Copyright 2011 Daniel Silverstone <dsilvers@digital-scurf.org>
+ *
+ * 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
+ * monkey implementation of font layout.
+ */
+
+#include <stddef.h>
+
+#include "utils/utf8.h"
+#include "desktop/plot_style.h"
+#include "desktop/gui_layout.h"
+
+#include "monkey/layout.h"
+
+static nserror nsfont_width(const plot_font_style_t *fstyle,
+ const char *string, size_t length,
+ int *width)
+{
+ *width = (fstyle->size * utf8_bounded_length(string, length)) / FONT_SIZE_SCALE;
+ return NSERROR_OK;
+}
+
+/**
+ * Find the position in a string where an x coordinate falls.
+ *
+ * \param fstyle style for this text
+ * \param string UTF-8 string to measure
+ * \param length length of string
+ * \param x x coordinate to search for
+ * \param char_offset updated to offset in string of actual_x, [0..length]
+ * \param actual_x updated to x coordinate of character closest to x
+ * \return true on success, false on error and error reported
+ */
+
+static nserror nsfont_position_in_string(const plot_font_style_t *fstyle,
+ const char *string, size_t length,
+ int x, size_t *char_offset, int *actual_x)
+{
+ *char_offset = x / (fstyle->size / FONT_SIZE_SCALE);
+ if (*char_offset > length)
+ *char_offset = length;
+ *actual_x = *char_offset * (fstyle->size / FONT_SIZE_SCALE);
+ return NSERROR_OK;
+}
+
+
+/**
+ * Find where to split a string to make it fit a width.
+ *
+ * \param fstyle style for this text
+ * \param string UTF-8 string to measure
+ * \param length length of string, in bytes
+ * \param x width available
+ * \param char_offset updated to offset in string of actual_x, [1..length]
+ * \param actual_x updated to x coordinate of character closest to x
+ * \return true on success, false on error and error reported
+ *
+ * On exit, char_offset indicates first character after split point.
+ *
+ * Note: char_offset of 0 should never be returned.
+ *
+ * Returns:
+ * char_offset giving split point closest to x, where actual_x <= x
+ * else
+ * char_offset giving split point closest to x, where actual_x > x
+ *
+ * Returning char_offset == length means no split possible
+ */
+
+static nserror nsfont_split(const plot_font_style_t *fstyle,
+ const char *string, size_t length,
+ int x, size_t *char_offset, int *actual_x)
+{
+ int c_off = *char_offset = x / (fstyle->size / FONT_SIZE_SCALE);
+ if (*char_offset > length) {
+ *char_offset = length;
+ } else {
+ while (*char_offset > 0) {
+ if (string[*char_offset] == ' ')
+ break;
+ (*char_offset)--;
+ }
+ if (*char_offset == 0) {
+ *char_offset = c_off;
+ while (*char_offset < length && string[*char_offset] != ' ') {
+ (*char_offset)++;
+ }
+ }
+ }
+ *actual_x = *char_offset * (fstyle->size / FONT_SIZE_SCALE);
+ return NSERROR_OK;
+}
+
+static struct gui_layout_table layout_table = {
+ .width = nsfont_width,
+ .position = nsfont_position_in_string,
+ .split = nsfont_split,
+};
+
+struct gui_layout_table *monkey_layout_table = &layout_table;