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-rw-r--r--frontends/beos/font.cpp374
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diff --git a/frontends/beos/font.cpp b/frontends/beos/font.cpp
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+/*
+ * Copyright 2008 François Revol <mmu_man@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
+ * Font handling (BeOS implementation).
+ * TODO: check for correctness, the code is taken from the GTK one.
+ * maybe use the current view instead of constructing a new BFont each time ?
+ */
+
+
+#define __STDBOOL_H__ 1
+#include <stdbool.h>
+#include <assert.h>
+#include <stdio.h>
+#include <Font.h>
+#include <String.h>
+#include <View.h>
+
+extern "C" {
+#include "utils/utils.h"
+#include "utils/log.h"
+#include "utils/nsoption.h"
+#include "utils/nsurl.h"
+#include "desktop/gui_layout.h"
+}
+
+#include "beos/gui.h"
+#include "beos/font.h"
+#include "beos/plotters.h"
+
+
+/**
+ * Convert a font style to a PangoFontDescription.
+ *
+ * \param font Beos font object.
+ * \param fstyle style for this text
+ */
+void nsbeos_style_to_font(BFont &font, const struct plot_font_style *fstyle)
+{
+ float size;
+ uint16 face = 0;
+ const char *family;
+
+ switch (fstyle->family) {
+ case PLOT_FONT_FAMILY_SERIF:
+ family = nsoption_charp(font_serif);
+ break;
+ case PLOT_FONT_FAMILY_MONOSPACE:
+ family = nsoption_charp(font_mono);
+ break;
+ case PLOT_FONT_FAMILY_CURSIVE:
+ family = nsoption_charp(font_cursive);
+ break;
+ case PLOT_FONT_FAMILY_FANTASY:
+ family = nsoption_charp(font_fantasy);
+ break;
+ case PLOT_FONT_FAMILY_SANS_SERIF:
+ default:
+ family = nsoption_charp(font_sans);
+ break;
+ }
+
+ if ((fstyle->flags & FONTF_ITALIC)) {
+ face = B_ITALIC_FACE;
+ } else if ((fstyle->flags & FONTF_OBLIQUE)) {
+ face = B_ITALIC_FACE;
+ // XXX: no OBLIQUE flag ??
+ // maybe find "Oblique" style
+ // or use SetShear() ?
+ }
+
+#ifndef __HAIKU__XXX
+ if (fstyle->weight >= 600) {
+ face |= B_BOLD_FACE;
+ }
+#else
+ if (fstyle->weight >= 600) {
+ if (fstyle->weight >= 800)
+ face |= B_HEAVY_FACE;
+ else
+ face |= B_BOLD_FACE;
+ } else if (fstyle->weight <= 300) {
+ face |= B_LIGHT_FACE;
+ }
+#endif
+/*
+ case CSS_FONT_WEIGHT_100: weight = 100; break;
+ case CSS_FONT_WEIGHT_200: weight = 200; break;
+ case CSS_FONT_WEIGHT_300: weight = 300; break;
+ case CSS_FONT_WEIGHT_400: weight = 400; break;
+ case CSS_FONT_WEIGHT_500: weight = 500; break;
+ case CSS_FONT_WEIGHT_600: weight = 600; break;
+ case CSS_FONT_WEIGHT_700: weight = 700; break;
+ case CSS_FONT_WEIGHT_800: weight = 800; break;
+ case CSS_FONT_WEIGHT_900: weight = 900; break;
+*/
+
+ if (!face)
+ face = B_REGULAR_FACE;
+
+//fprintf(stderr, "nsbeos_style_to_font: %d, %d, %d -> '%s' %04x\n", style->font_family, style->font_style, style->font_weight, family, face);
+
+ if (family) {
+ font_family beos_family;
+
+ strncpy(beos_family, family, B_FONT_FAMILY_LENGTH);
+ // Ensure it's terminated
+ beos_family[B_FONT_FAMILY_LENGTH] = '\0';
+
+ font.SetFamilyAndFace(beos_family, face);
+ } else {
+ //XXX not used
+ font = be_plain_font;
+ font.SetFace(face);
+ }
+
+//fprintf(stderr, "nsbeos_style_to_font: value %f unit %d\n", style->font_size.value.length.value, style->font_size.value.length.unit);
+ size = fstyle->size / FONT_SIZE_SCALE;
+
+//fprintf(stderr, "nsbeos_style_to_font: %f %d\n", size, style->font_size.value.length.unit);
+
+ font.SetSize(size);
+}
+
+
+/**
+ * Measure the width of a string.
+ *
+ * \param fstyle style for this text
+ * \param string UTF-8 string to measure
+ * \param length length of string
+ * \param width updated to width of string[0..length)
+ * \return true on success, false on error and error reported
+ */
+static nserror beos_font_width(const plot_font_style_t *fstyle,
+ const char *string, size_t length,
+ int *width)
+{
+ //fprintf(stderr, "%s(, '%s', %d, )\n", __FUNCTION__, string, length);
+ BFont font;
+
+ if (length == 0) {
+ *width = 0;
+ return NSERROR_OK;
+ }
+
+ nsbeos_style_to_font(font, fstyle);
+ *width = (int)font.StringWidth(string, length);
+
+ return NSERROR_OK;
+}
+
+
+static int utf8_char_len(const char *c)
+{
+ uint8 *p = (uint8 *)c;
+ uint8 m = 0xE0;
+ uint8 v = 0xC0;
+ int i;
+
+ if (!*p)
+ return 0;
+ if ((*p & 0x80) == 0)
+ return 1;
+ if ((*p & 0xC0) == 0x80)
+ return 1; // actually one of the remaining bytes...
+ for (i = 2; i < 5; i++) {
+ if ((*p & m) == v)
+ return i;
+ v = (v >> 1) | 0x80;
+ m = (m >> 1) | 0x80;
+ }
+ return i;
+}
+
+
+/**
+ * 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 beos_font_position(const plot_font_style_t *fstyle,
+ const char *string, size_t length,
+ int x, size_t *char_offset, int *actual_x)
+{
+ //LOG("(, '%s', %d, %d, , )", string, length, x);
+ //fprintf(stderr, "%s(, '%s', %d, %d, , )\n", __FUNCTION__, string, length, x);
+ int index;
+ BFont font;
+
+ nsbeos_style_to_font(font, fstyle);
+ BString str(string);
+ int32 len = str.CountChars();
+ float escapements[len];
+ float esc = 0.0;
+ float current = 0.0;
+ int i;
+
+ index = 0;
+ font.GetEscapements(string, len, escapements);
+ // slow but it should work
+ for (i = 0; string[index] && i < len; i++) {
+ esc += escapements[i];
+ current = font.Size() * esc;
+ index += utf8_char_len(&string[index]);
+ // is current char already too far away?
+ if (x < current)
+ break;
+ }
+ *actual_x = (int)current;
+ *char_offset = i; //index;
+
+ 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 beos_font_split(const plot_font_style_t *fstyle,
+ const char *string, size_t length,
+ int x, size_t *char_offset, int *actual_x)
+{
+ //fprintf(stderr, "%s(, '%s', %d, %d, , )\n", __FUNCTION__, string, length, x);
+ //LOG("(, '%s', %d, %d, , )", string, length, x);
+ int index = 0;
+ BFont font;
+
+ nsbeos_style_to_font(font, fstyle);
+ BString str(string);
+ int32 len = str.CountChars();
+ float escapements[len];
+ float esc = 0.0;
+ float current = 0.0;
+ float last_x = 0.0;
+ int i;
+ int last_space = 0;
+
+ font.GetEscapements(string, len, escapements);
+ // very slow but it should work
+ for (i = 0; string[index] && i < len; i++) {
+ if (string[index] == ' ') {
+ last_x = current;
+ last_space = index;
+ }
+ if (x < current && last_space != 0) {
+ *actual_x = (int)last_x;
+ *char_offset = last_space;
+ return NSERROR_OK;;
+ }
+ esc += escapements[i];
+ current = font.Size() * esc;
+ index += utf8_char_len(&string[index]);
+ }
+ *actual_x = MIN(*actual_x, (int)current);
+ *char_offset = index;
+
+ return NSERROR_OK;
+}
+
+
+/**
+ * Render a string.
+ *
+ * \param fstyle style for this text
+ * \param string UTF-8 string to measure
+ * \param length length of string
+ * \param x x coordinate
+ * \param y y coordinate
+ * \return true on success, false on error and error reported
+ */
+
+bool nsfont_paint(const plot_font_style_t *fstyle,
+ const char *string, size_t length,
+ int x, int y)
+{
+ //fprintf(stderr, "%s(, '%s', %d, %d, %d, )\n", __FUNCTION__, string, length, x, y);
+ //CALLED();
+ BFont font;
+ rgb_color oldbg;
+ rgb_color background;
+ rgb_color foreground;
+ BView *view;
+ float size;
+
+ if (length == 0)
+ return true;
+
+ nsbeos_style_to_font(font, fstyle);
+ background = nsbeos_rgb_colour(fstyle->background);
+ foreground = nsbeos_rgb_colour(fstyle->foreground);
+
+ view = nsbeos_current_gc/*_lock*/();
+ if (view == NULL) {
+ beos_warn_user("No GC", 0);
+ return false;
+ }
+
+ oldbg = view->LowColor();
+ drawing_mode oldmode = view->DrawingMode();
+ view->SetLowColor(B_TRANSPARENT_32_BIT);
+
+ //view->SetScale() XXX
+
+//printf("nsfont_paint: Size: %f\n", font.Size());
+ size = (float)font.Size();
+#warning XXX use scale
+
+ view->SetFont(&font);
+ view->SetHighColor(foreground);
+ view->SetDrawingMode(B_OP_OVER);
+
+ BString line(string, length);
+
+ BPoint where(x, y + 1);
+ view->DrawString(line.String(), where);
+
+ view->SetDrawingMode(oldmode);
+ if (memcmp(&oldbg, &background, sizeof(rgb_color)))
+ view->SetLowColor(oldbg);
+
+ //nsbeos_current_gc_unlock();
+
+ return true;
+}
+
+
+static struct gui_layout_table layout_table = {
+ /*.width = */beos_font_width,
+ /*.position = */beos_font_position,
+ /*.split = */beos_font_split
+};
+
+struct gui_layout_table *beos_layout_table = &layout_table;