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author | Vincent Sanders <vince@kyllikki.org> | 2016-05-05 22:28:51 +0100 |
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committer | Vincent Sanders <vince@kyllikki.org> | 2016-05-15 13:44:34 +0100 |
commit | d21447d096a320a08b3efb2b8768fad0dcdcfd64 (patch) | |
tree | 1a83814b7c9e94b2f13c473261f23dd3a17dee64 /frontends/monkey/layout.c | |
parent | 2cbb337756d9af5bda4d594964d446439f602551 (diff) | |
download | netsurf-d21447d096a320a08b3efb2b8768fad0dcdcfd64.tar.gz netsurf-d21447d096a320a08b3efb2b8768fad0dcdcfd64.tar.bz2 |
move frontends into sub directory
Diffstat (limited to 'frontends/monkey/layout.c')
-rw-r--r-- | frontends/monkey/layout.c | 117 |
1 files changed, 117 insertions, 0 deletions
diff --git a/frontends/monkey/layout.c b/frontends/monkey/layout.c new file mode 100644 index 000000000..401ca158c --- /dev/null +++ b/frontends/monkey/layout.c @@ -0,0 +1,117 @@ +/* + * 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; |