404 lines
10 KiB
C++
404 lines
10 KiB
C++
/*
|
|
* 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 "css/css.h"
|
|
#include "render/font.h"
|
|
#include "utils/utils.h"
|
|
#include "utils/log.h"
|
|
#include "desktop/options.h"
|
|
}
|
|
|
|
#include "beos/beos_gui.h"
|
|
#include "beos/beos_font.h"
|
|
#include "beos/beos_plotters.h"
|
|
|
|
static bool nsfont_width(const struct css_style *style,
|
|
const char *string, size_t length,
|
|
int *width);
|
|
static bool nsfont_position_in_string(const struct css_style *style,
|
|
const char *string, size_t length,
|
|
int x, size_t *char_offset, int *actual_x);
|
|
static bool nsfont_split(const struct css_style *style,
|
|
const char *string, size_t length,
|
|
int x, size_t *char_offset, int *actual_x);
|
|
|
|
const struct font_functions nsfont = {
|
|
nsfont_width,
|
|
nsfont_position_in_string,
|
|
nsfont_split
|
|
};
|
|
|
|
|
|
/**
|
|
* Measure the width of a string.
|
|
*
|
|
* \param style css_style for this text, with style->font_size.size ==
|
|
* CSS_FONT_SIZE_LENGTH
|
|
* \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
|
|
*/
|
|
|
|
bool nsfont_width(const struct css_style *style,
|
|
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 true;
|
|
}
|
|
|
|
nsbeos_style_to_font(font, style);
|
|
*width = (int)font.StringWidth(string, length);
|
|
return true;
|
|
}
|
|
|
|
|
|
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 style css_style for this text, with style->font_size.size ==
|
|
* CSS_FONT_SIZE_LENGTH
|
|
* \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
|
|
*/
|
|
|
|
bool nsfont_position_in_string(const struct css_style *style,
|
|
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, style);
|
|
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++) {
|
|
if (x < current)
|
|
break;
|
|
esc += escapements[i];
|
|
current = font.Size() * esc;
|
|
index += utf8_char_len(&string[index]);
|
|
}
|
|
*actual_x = (int)current;
|
|
*char_offset = i; //index;
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Find where to split a string to make it fit a width.
|
|
*
|
|
* \param style css_style for this text, with style->font_size.size ==
|
|
* CSS_FONT_SIZE_LENGTH
|
|
* \param string UTF-8 string to measure
|
|
* \param length length of string
|
|
* \param x width available
|
|
* \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
|
|
*
|
|
* On exit, [char_offset == 0 ||
|
|
* string[char_offset] == ' ' ||
|
|
* char_offset == length]
|
|
*/
|
|
|
|
bool nsfont_split(const struct css_style *style,
|
|
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, style);
|
|
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);
|
|
// 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) {
|
|
*actual_x = (int)last_x;
|
|
*char_offset = last_space;
|
|
return true;
|
|
}
|
|
esc += escapements[i];
|
|
current = font.Size() * esc;
|
|
index += utf8_char_len(&string[index]);
|
|
}
|
|
*actual_x = MIN(*actual_x, (int)current);
|
|
*char_offset = index;
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
/**
|
|
* Render a string.
|
|
*
|
|
* \param style css_style for this text, with style->font_size.size ==
|
|
* CSS_FONT_SIZE_LENGTH
|
|
* \param string UTF-8 string to measure
|
|
* \param length length of string
|
|
* \param x x coordinate
|
|
* \param y y coordinate
|
|
* \param c colour for text
|
|
* \return true on success, false on error and error reported
|
|
*/
|
|
|
|
bool nsfont_paint(const struct css_style *style,
|
|
const char *string, size_t length,
|
|
int x, int y, colour bg, colour c)
|
|
{
|
|
//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, style);
|
|
background = nsbeos_rgb_colour(bg);
|
|
foreground = nsbeos_rgb_colour(c);
|
|
|
|
view = nsbeos_current_gc/*_lock*/();
|
|
if (view == NULL) {
|
|
warn_user("No GC", 0);
|
|
return false;
|
|
}
|
|
|
|
oldbg = view->LowColor();
|
|
drawing_mode oldmode = view->DrawingMode();
|
|
#if 0
|
|
if (oldbg != background)
|
|
view->SetLowColor(background);
|
|
#endif
|
|
view->SetLowColor(B_TRANSPARENT_32_BIT);
|
|
|
|
//view->SetScale() XXX
|
|
|
|
//printf("nsfont_paint: Size: %f\n", font.Size());
|
|
size = (float)(font.Size() * nsbeos_plot_get_scale());
|
|
#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;
|
|
}
|
|
|
|
|
|
/**
|
|
* Convert a css_style to a PangoFontDescription.
|
|
*
|
|
* \param style css_style for this text, with style->font_size.size ==
|
|
* CSS_FONT_SIZE_LENGTH
|
|
* \return a new Pango font description
|
|
*/
|
|
|
|
void nsbeos_style_to_font(BFont &font,
|
|
const struct css_style *style)
|
|
{
|
|
float size;
|
|
uint16 face = 0;
|
|
const char *family;
|
|
|
|
assert(style->font_size.size == CSS_FONT_SIZE_LENGTH);
|
|
|
|
switch (style->font_family) {
|
|
case CSS_FONT_FAMILY_SERIF:
|
|
family = option_font_serif;
|
|
break;
|
|
case CSS_FONT_FAMILY_MONOSPACE:
|
|
family = option_font_mono;
|
|
break;
|
|
case CSS_FONT_FAMILY_CURSIVE:
|
|
family = option_font_cursive;
|
|
break;
|
|
case CSS_FONT_FAMILY_FANTASY:
|
|
family = option_font_fantasy;
|
|
break;
|
|
case CSS_FONT_FAMILY_SANS_SERIF:
|
|
default:
|
|
family = option_font_sans;
|
|
break;
|
|
}
|
|
|
|
|
|
switch (style->font_style) {
|
|
case CSS_FONT_STYLE_ITALIC:
|
|
face = B_ITALIC_FACE;
|
|
break;
|
|
case CSS_FONT_STYLE_OBLIQUE:
|
|
face = B_ITALIC_FACE;
|
|
// XXX: no OBLIQUE flag ??
|
|
// maybe find "Oblique" style
|
|
// or use SetShear() ?
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
switch (style->font_weight) {
|
|
case CSS_FONT_WEIGHT_NORMAL:
|
|
break;
|
|
case CSS_FONT_WEIGHT_BOLD:
|
|
case CSS_FONT_WEIGHT_600:
|
|
case CSS_FONT_WEIGHT_700:
|
|
#ifndef __HAIKU__XXX
|
|
case CSS_FONT_WEIGHT_800:
|
|
case CSS_FONT_WEIGHT_900:
|
|
#endif
|
|
face |= B_BOLD_FACE; break;
|
|
#ifdef __HAIKU__XXX
|
|
case CSS_FONT_WEIGHT_BOLDER:
|
|
case CSS_FONT_WEIGHT_800:
|
|
case CSS_FONT_WEIGHT_900:
|
|
face |= B_HEAVY_FACE; break;
|
|
case CSS_FONT_WEIGHT_100:
|
|
case CSS_FONT_WEIGHT_200:
|
|
case CSS_FONT_WEIGHT_300:
|
|
case CSS_FONT_WEIGHT_LIGHTER:
|
|
face |= B_LIGHT_FACE; break;
|
|
#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;
|
|
*/
|
|
default: 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.SetFamilyAndFace((const font_family)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);
|
|
if (style->font_size.value.length.unit == CSS_UNIT_PT)
|
|
size = style->font_size.value.length.value;
|
|
else
|
|
size = css_len2pt(&style->font_size.value.length, style);
|
|
// * 72.0 / 90.0;
|
|
|
|
//XXX: pango stuff ?
|
|
if (size < abs(option_font_min_size / 10))
|
|
size = option_font_min_size / 10;
|
|
|
|
//fprintf(stderr, "nsbeos_style_to_font: %f %d\n", size, style->font_size.value.length.unit);
|
|
|
|
font.SetSize(size);
|
|
}
|