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src/Font.cc
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255
src/Font.cc
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// Font.cc
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// Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//$Id: Font.cc,v 1.1 2002/03/21 10:51:48 fluxgen Exp $
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#include "Font.hh"
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#include <cstdarg>
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#include <iostream> //for debug msg
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using namespace std;
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//use gnu extensions
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#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif //_GNU_SOURCE
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#ifdef HAVE_CONFIG_H
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# include "../config.h"
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#endif // HAVE_CONFIG_H
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namespace FbTk
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{
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bool Font::m_multibyte = false; //TODO: fix multibyte
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Font::Font(Display *display, const char *name):m_loaded(false),
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m_display(display) {
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m_font.fontstruct = 0;
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m_font.set_extents = 0;
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m_font.set = 0;
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if (name!=0) {
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load(name);
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}
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}
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Font::~Font() {
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freeFont();
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}
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bool Font::load(const char *name) {
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if (m_multibyte) {
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XFontSet set = createFontSet(m_display, name);
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if (!set)
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return false;
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freeFont();
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m_font.set = set;
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m_font.set_extents = XExtentsOfFontSet(m_font.set);
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} else {
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XFontStruct *font = XLoadQueryFont(m_display, name);
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if (font==0)
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return false;
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freeFont(); //free old font
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m_font.fontstruct = font; //set new font
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}
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m_loaded = true; //mark the font loaded
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return true;
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}
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bool Font::loadFromDatabase(XrmDatabase &database, const char *rname, const char *rclass) {
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assert(rname);
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assert(rclass);
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XrmValue value;
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char *value_type;
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//this should probably be moved to a Database class so we can keep
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//track of database init
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if (XrmGetResource(database, rname, rclass, &value_type, &value)) {
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#ifdef DEBUG
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cerr<<__FILE__<<"("<<__LINE__<<"): Load font:"<<value.addr<<endl;
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#endif
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return load(value.addr);
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}
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return false;
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}
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unsigned int Font::getTextWidth(const char *text, unsigned int size) const {
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if (text==0)
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return 0;
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if (multibyte()) {
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XRectangle ink, logical;
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XmbTextExtents(m_font.set, text, size,
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&ink, &logical);
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return logical.width;
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} else {
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assert(m_font.fontstruct);
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return XTextWidth(m_font.fontstruct,
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text, size);
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}
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return 0;
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}
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unsigned int Font::getHeight() const {
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if (multibyte() && getFontSetExtents())
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return getFontSetExtents()->max_ink_extent.height;
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if (getFontStruct())
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return getFontStruct()->ascent + getFontStruct()->descent;
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return 0;
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}
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XFontSet Font::createFontSet(Display *display, const char *fontname) {
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XFontSet fs;
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const int FONT_ELEMENT_SIZE=50;
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char **missing, *def = "-";
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int nmissing, pixel_size = 0, buf_size = 0;
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char weight[FONT_ELEMENT_SIZE], slant[FONT_ELEMENT_SIZE];
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fs = XCreateFontSet(display,
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fontname, &missing, &nmissing, &def);
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if (fs && (! nmissing)) return fs;
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#ifdef HAVE_SETLOCALE
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if (! fs) {
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if (nmissing) XFreeStringList(missing);
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setlocale(LC_CTYPE, "C");
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fs = XCreateFontSet(m_display, fontname,
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&missing, &nmissing, &def);
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setlocale(LC_CTYPE, "");
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}
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#endif // HAVE_SETLOCALE
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if (fs) {
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XFontStruct **fontstructs;
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char **fontnames;
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XFontsOfFontSet(fs, &fontstructs, &fontnames);
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fontname = fontnames[0];
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}
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getFontElement(fontname, weight, FONT_ELEMENT_SIZE,
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"-medium-", "-bold-", "-demibold-", "-regular-", NULL);
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getFontElement(fontname, slant, FONT_ELEMENT_SIZE,
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"-r-", "-i-", "-o-", "-ri-", "-ro-", NULL);
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getFontSize(fontname, &pixel_size);
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if (! strcmp(weight, "*"))
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strncpy(weight, "medium", FONT_ELEMENT_SIZE);
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if (! strcmp(slant, "*"))
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strncpy(slant, "r", FONT_ELEMENT_SIZE);
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if (pixel_size < 3)
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pixel_size = 3;
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else if (pixel_size > 97)
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pixel_size = 97;
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buf_size = strlen(fontname) + (FONT_ELEMENT_SIZE * 2) + 64;
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char *pattern2 = new char[buf_size];
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snprintf(pattern2, buf_size - 1,
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"%s,"
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"-*-*-%s-%s-*-*-%d-*-*-*-*-*-*-*,"
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"-*-*-*-*-*-*-%d-*-*-*-*-*-*-*,*",
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fontname, weight, slant, pixel_size, pixel_size);
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fontname = pattern2;
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if (nmissing)
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XFreeStringList(missing);
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if (fs)
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XFreeFontSet(display, fs);
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fs = XCreateFontSet(display, fontname,
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&missing, &nmissing, &def);
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delete [] pattern2;
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return fs;
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}
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const char *Font::getFontElement(const char *pattern, char *buf, int bufsiz, ...) {
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const char *p, *v;
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char *p2;
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va_list va;
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va_start(va, bufsiz);
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buf[bufsiz-1] = 0;
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buf[bufsiz-2] = '*';
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while((v = va_arg(va, char *)) != NULL) {
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p = strcasestr(pattern, v);
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if (p) {
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strncpy(buf, p+1, bufsiz-2);
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p2 = strchr(buf, '-');
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if (p2) *p2=0;
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va_end(va);
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return p;
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}
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}
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va_end(va);
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strncpy(buf, "*", bufsiz);
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return NULL;
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}
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const char *Font::getFontSize(const char *pattern, int *size) {
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const char *p;
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const char *p2=0;
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int n=0;
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for (p=pattern; 1; p++) {
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if (!*p) {
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if (p2!=NULL && n>1 && n<72) {
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*size = n; return p2+1;
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} else {
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*size = 16; return NULL;
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}
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} else if (*p=='-') {
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if (n>1 && n<72 && p2!=NULL) {
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*size = n;
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return p2+1;
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}
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p2=p; n=0;
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} else if (*p>='0' && *p<='9' && p2!=NULL) {
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n *= 10;
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n += *p-'0';
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} else {
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p2=NULL; n=0;
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}
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}
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}
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void Font::freeFont() {
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//free memory
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if (m_font.fontstruct!=0)
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XFreeFont(m_display, m_font.fontstruct);
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if (m_font.set)
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XFreeFontSet(m_display, m_font.set);
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//clear struct
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m_font.fontstruct = 0;
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m_font.set = 0;
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m_font.set_extents = 0;
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m_loaded = false; //mark the font not loaded
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}
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};
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68
src/Font.hh
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68
src/Font.hh
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@ -0,0 +1,68 @@
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// Font.cc
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// Copyright (c) 2002 Henrik Kinnunen (fluxgen@linuxmail.org)
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the "Software"),
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// to deal in the Software without restriction, including without limitation
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// the rights to use, copy, modify, merge, publish, distribute, sublicense,
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// and/or sell copies of the Software, and to permit persons to whom the
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// Software is furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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//$Id: Font.hh,v 1.1 2002/03/21 10:51:48 fluxgen Exp $
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#ifndef FBTK_FONT_HH
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#define FBTK_FONT_HH
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#include <X11/Xresource.h>
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namespace FbTk
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{
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class Font
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{
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public:
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Font(Display *display, const char *name=0);
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virtual ~Font();
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//manipulators
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bool load(const char *name);
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bool loadFromDatabase(XrmDatabase &database, const char *rname, const char *rclass);
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//accessors
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inline bool isLoaded() const { return m_loaded; }
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inline XFontStruct *getFontStruct() const { return m_font.fontstruct; }
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inline XFontSet &getFontSet() { return m_font.set; }
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inline XFontSetExtents *getFontSetExtents() const { return m_font.set_extents; }
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static inline bool multibyte() { return m_multibyte; }
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unsigned int getTextWidth(const char *text, unsigned int size) const;
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unsigned int getHeight() const;
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Display *getDisplay() const { return m_display; }
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private:
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void freeFont();
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static XFontSet createFontSet(Display *display, const char *fontname);
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static const char *getFontSize(const char *pattern, int *size);
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static const char *getFontElement(const char *pattern, char *buf, int bufsiz, ...);
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struct FontType
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{
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XFontSet set;
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XFontSetExtents *set_extents;
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XFontStruct *fontstruct;
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} m_font;
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bool m_loaded;
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static bool m_multibyte;
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Display *m_display;
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};
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}; //end namespace FbTk
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#endif //FBTK_FONT_HH
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