mirror of
https://github.com/netsurf-browser/netsurf
synced 2024-11-30 02:03:14 +03:00
291 lines
7.2 KiB
C
291 lines
7.2 KiB
C
/*
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* Copyright 2008 - 2016 Chris Young <chris@unsatisfactorysoftware.co.uk>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "amiga/os3support.h"
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#include <proto/diskfont.h>
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#include <proto/exec.h>
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#include <proto/graphics.h>
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#include <proto/utility.h>
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#include <graphics/rpattr.h>
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#include "utils/log.h"
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#include "utils/utf8.h"
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#include "utils/nsoption.h"
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#include "desktop/font.h"
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#include "amiga/font.h"
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#include "amiga/font_diskfont.h"
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#include "amiga/gui.h"
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#include "amiga/utf8.h"
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#define MAX_FONT_NAME_SIZE 33
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static struct TextFont *ami_font_bm_open(struct RastPort *rp, const plot_font_style_t *fstyle)
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{
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struct TextFont *bmfont = NULL;
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struct TextAttr tattr;
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char *fontname;
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char font[MAX_FONT_NAME_SIZE];
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if(rp == NULL) return NULL;
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tattr.ta_Flags = 0;
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switch(fstyle->family)
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{
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case PLOT_FONT_FAMILY_SANS_SERIF:
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fontname = nsoption_charp(font_sans);
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break;
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case PLOT_FONT_FAMILY_SERIF:
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fontname = nsoption_charp(font_serif);
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break;
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case PLOT_FONT_FAMILY_MONOSPACE:
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fontname = nsoption_charp(font_mono);
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break;
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case PLOT_FONT_FAMILY_CURSIVE:
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fontname = nsoption_charp(font_cursive);
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break;
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case PLOT_FONT_FAMILY_FANTASY:
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fontname = nsoption_charp(font_fantasy);
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break;
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default:
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return NULL;
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break;
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}
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tattr.ta_Style = FS_NORMAL;
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if (fstyle->flags & FONTF_OBLIQUE)
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tattr.ta_Style = FSF_ITALIC;
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if (fstyle->flags & FONTF_ITALIC)
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tattr.ta_Style = FSF_ITALIC;
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if (fstyle->weight >= 700)
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tattr.ta_Style |= FSF_BOLD;
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snprintf(font, MAX_FONT_NAME_SIZE, "%s.font", fontname);
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tattr.ta_Name = font;
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tattr.ta_YSize = fstyle->size / FONT_SIZE_SCALE;
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LOG("font: %s/%d", tattr.ta_Name, tattr.ta_YSize);
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if((bmfont = OpenDiskFont(&tattr))) {
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SetRPAttrs(rp, RPTAG_Font, bmfont, TAG_DONE);
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}
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return bmfont;
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}
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static void ami_font_bm_close(struct TextFont *bmfont)
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{
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CloseFont(bmfont);
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}
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static size_t ami_font_bm_convert_local_to_utf8_offset(const char *utf8string, size_t length, UWORD offset)
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{
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size_t chr = 0;
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for(UWORD i = 0; i < offset; i++) {
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chr = utf8_next(utf8string, length, chr);
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}
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return chr;
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}
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static bool amiga_bm_nsfont_width(const plot_font_style_t *fstyle,
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const char *string, size_t length,
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int *width)
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{
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char *localtext = NULL;
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if((glob == NULL) || (glob->rp == NULL)) return false;
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*width = length;
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struct TextFont *bmfont = ami_font_bm_open(glob->rp, fstyle);
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if(bmfont == NULL) return false;
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if(utf8_to_local_encoding(string, length, &localtext) != NSERROR_OK) {
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ami_font_bm_close(bmfont);
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return false;
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}
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*width = TextLength(glob->rp, localtext, (UWORD)strlen(localtext));
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free(localtext);
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ami_font_bm_close(bmfont);
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return true;
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}
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/**
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* Find the position in a string where an x coordinate falls.
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*
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* \param fstyle style for this text
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* \param string UTF-8 string to measure
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* \param length length of string
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* \param x x coordinate to search for
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* \param char_offset updated to offset in string of actual_x, [0..length]
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* \param actual_x updated to x coordinate of character closest to x
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* \return true on success, false on error and error reported
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*/
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static bool amiga_bm_nsfont_position_in_string(const plot_font_style_t *fstyle,
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const char *string, size_t length,
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int x, size_t *char_offset, int *actual_x)
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{
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struct TextExtent extent;
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struct TextFont *bmfont;
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char *localtext = NULL;
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UWORD co = 0;
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if((glob == NULL) || (glob->rp == NULL)) return false;
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bmfont = ami_font_bm_open(glob->rp, fstyle);
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if(bmfont == NULL) return false;
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if(utf8_to_local_encoding(string, length, &localtext) != NSERROR_OK) {
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ami_font_bm_close(bmfont);
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return false;
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}
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co = TextFit(glob->rp, localtext, (UWORD)strlen(localtext),
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&extent, NULL, 1, x, 32767);
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*char_offset = ami_font_bm_convert_local_to_utf8_offset(string, length, co);
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*actual_x = extent.te_Extent.MaxX;
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free(localtext);
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ami_font_bm_close(bmfont);
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return true;
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}
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/**
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* Find where to split a string to make it fit a width.
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*
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* \param fstyle style for this text
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* \param string UTF-8 string to measure
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* \param length length of string
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* \param x width available
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* \param char_offset updated to offset in string of actual_x, [1..length]
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* \param actual_x updated to x coordinate of character closest to x
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* \return true on success, false on error and error reported
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*
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* On exit, char_offset indicates first character after split point.
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*
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* Note: char_offset of 0 should never be returned.
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*
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* Returns:
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* char_offset giving split point closest to x, where actual_x <= x
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* else
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* char_offset giving split point closest to x, where actual_x > x
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*
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* Returning char_offset == length means no split possible
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*/
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static bool amiga_bm_nsfont_split(const plot_font_style_t *fstyle,
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const char *string, size_t length,
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int x, size_t *char_offset, int *actual_x)
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{
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struct TextExtent extent;
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UWORD co, offset;
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char *charp;
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char *localtext;
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if((glob == NULL) || (glob->rp == NULL)) return false;
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struct TextFont *bmfont = ami_font_bm_open(glob->rp, fstyle);
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if(bmfont == NULL) return false;
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if(utf8_to_local_encoding(string, length, &localtext) != NSERROR_OK) {
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ami_font_bm_close(bmfont);
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return false;
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}
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offset = TextFit(glob->rp, localtext, (UWORD)strlen(localtext),
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&extent, NULL, 1, (UWORD)x, 32767);
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co = offset;
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charp = localtext + co;
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while((*charp != ' ') && (co > 0)) {
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charp--;
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co--;
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}
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if(co == 0) {
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co = offset;
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charp = localtext + co;
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while((*charp != ' ') && (co < strlen(localtext))) {
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charp++;
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co++;
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}
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}
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if((co > 0) && (co < strlen(localtext))) {
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*actual_x = TextLength(glob->rp, localtext, co);
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*char_offset = ami_font_bm_convert_local_to_utf8_offset(string, length, co);
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} else {
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*actual_x = x;
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*char_offset = length;
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}
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free(localtext);
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ami_font_bm_close(bmfont);
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return true;
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}
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static ULONG amiga_bm_nsfont_text(struct RastPort *rp, const char *string, ULONG length,
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const plot_font_style_t *fstyle, ULONG dx, ULONG dy, bool aa)
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{
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if(!string || string[0]=='\0') return 0;
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if(!length) return 0;
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if(rp == NULL) return 0;
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struct TextFont *bmfont = ami_font_bm_open(rp, fstyle);
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char *localtext = NULL;
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if(bmfont == NULL) return 0;
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if(utf8_to_local_encoding(string, length, &localtext) == NSERROR_OK) {
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Move(rp, dx, dy);
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Text(rp, localtext, (UWORD)strlen(localtext));
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free(localtext);
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}
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ami_font_bm_close(bmfont);
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return 0;
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}
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const struct ami_font_functions ami_font_diskfont_table = {
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amiga_bm_nsfont_width,
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amiga_bm_nsfont_position_in_string,
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amiga_bm_nsfont_split,
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amiga_bm_nsfont_text
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};
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void ami_font_diskfont_init(void)
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{
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/* Set up table */
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ami_nsfont = &ami_font_diskfont_table;
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}
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