mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-23 14:59:47 +03:00
97 lines
3.0 KiB
C
97 lines
3.0 KiB
C
/*
|
|
* 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/>.
|
|
*/
|
|
|
|
#include "css/css.h"
|
|
#include "render/font.h"
|
|
#include "desktop/options.h"
|
|
#include "utils/utf8.h"
|
|
|
|
|
|
static bool 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 true;
|
|
}
|
|
|
|
/**
|
|
* 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 bool 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 true;
|
|
}
|
|
|
|
|
|
/**
|
|
* 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
|
|
* \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]
|
|
*/
|
|
|
|
static bool nsfont_split(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;
|
|
} else {
|
|
while (*char_offset > 0) {
|
|
if (string[*char_offset] == ' ')
|
|
break;
|
|
(*char_offset)--;
|
|
}
|
|
}
|
|
*actual_x = *char_offset * (fstyle->size / FONT_SIZE_SCALE);
|
|
return true;
|
|
}
|
|
|
|
const struct font_functions nsfont = {
|
|
nsfont_width,
|
|
nsfont_position_in_string,
|
|
nsfont_split
|
|
};
|