520 lines
15 KiB
C++
520 lines
15 KiB
C++
// Font.cc
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// Copyright (c) 2002-2004 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 1.20 2004/09/03 14:17:47 akir Exp $
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#include "StringUtil.hh"
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#include "Font.hh"
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#include "FontImp.hh"
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#include "I18n.hh"
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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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// for antialias
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#ifdef USE_XFT
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#include "XftFontImp.hh"
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#endif // USE_XFT
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// for multibyte support
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#ifdef USE_XMB
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#include "XmbFontImp.hh"
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#endif //USE_XMB
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// standard font system
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#include "XFontImp.hh"
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#include "GContext.hh"
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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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#ifndef __USE_GNU
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#define __USE_GNU
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#endif //__USE_GNU
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#include <iostream>
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#ifdef HAVE_CSTRING
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#include <cstring>
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#else
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#include <string.h>
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#endif
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#ifdef HAVE_CSTDLIB
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#include <cstdlib>
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#else
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#include <stdlib.h>
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#endif
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#include <list>
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#include <typeinfo>
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#include <langinfo.h>
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#ifdef HAVE_SSTREAM
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#include <sstream>
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#define FB_istringstream istringstream
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#elif HAVE_STRSTREAM
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#include <strstream>
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#define FB_istringstream istrstream
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#else
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#error "You dont have sstream or strstream headers!"
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#endif // HAVE_STRSTREAM
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#ifdef HAVE_CSTDLIB
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#include <cstdlib>
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#else
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#include <stdlib.h>
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#endif
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using namespace std;
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namespace {
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#ifdef HAVE_SETLOCALE
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#include <locale.h>
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#endif //HAVE_SETLOCALE
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#ifdef HAVE_ICONV
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/**
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Recodes the text from one encoding to another
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assuming cd is correct
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@param cd the iconv type
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@param msg text to be converted
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@param len number of chars to convert
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@return the recoded string, or 0 on failure
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*/
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char* recode(iconv_t cd,
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const char *msg, size_t size) {
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// If empty message, yes this can happen, return
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if(strlen(msg) == 0 || size == 0)
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return 0;
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if(strlen(msg) < size)
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size = strlen(msg);
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size_t inbytesleft = size;
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size_t outbytesleft = 4*inbytesleft;
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char *new_msg = new char[outbytesleft];
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char *new_msg_ptr = new_msg;
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char *msg_ptr = strdup(msg);
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char *orig_msg_ptr = msg_ptr; // msg_ptr modified in iconv call
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size_t result = (size_t)(-1);
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#ifdef HAVE_CONST_ICONV
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result = iconv(cd, (const char**)(&msg_ptr), &inbytesleft, &new_msg, &outbytesleft);
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#else
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result = iconv(cd, &msg_ptr, &inbytesleft, &new_msg, &outbytesleft);
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#endif // HAVE_CONST_ICONV
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if (result == (size_t)(-1)) {
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// iconv can fail for three reasons
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// 1) Invalid multibyte sequence is encountered in the input
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// 2) An incomplete multibyte sequence
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// 3) The output buffer has no more room for the next converted character.
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// So we the delete new message and return original message
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delete new_msg_ptr;
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free(orig_msg_ptr);
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return 0;
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}
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free(orig_msg_ptr);
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*new_msg = '\0';
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if(inbytesleft != 0) {
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delete new_msg_ptr;
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return 0;
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}
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return new_msg_ptr;
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}
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#else
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char *recode(int cd,
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const char *msg, size_t size) {
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return 0;
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}
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#endif // HAVE_ICONV
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int extract_halo_options(const std::string& opts, std::string& color) {
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std::list< std::string > tokens;
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size_t sep= opts.find_first_of(':');
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if ( sep == std::string::npos )
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return 1;
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FbTk::StringUtil::stringtok(tokens, opts.substr(sep + 1, opts.length()), ";");
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tokens.unique();
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std::list< std::string >::const_iterator token;
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for ( token= tokens.begin(); token != tokens.end(); token++ ) {
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if ( (*token).find("color=", 0) != std::string::npos ) {
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size_t s= (*token).find_first_of('=');
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std::string c= (*token).substr(s + 1, (*token).length());
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if ( !c.empty() )
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std::swap(color, c);
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}
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}
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return 1;
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}
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int extract_shadow_options(const std::string& opts,
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std::string& color,
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int& offx, int& offy) {
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std::list< std::string > tokens;
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size_t sep= opts.find_first_of(':');
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if ( sep == std::string::npos )
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return 1;
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FbTk::StringUtil::stringtok(tokens, opts.substr(sep + 1, opts.length()), ";");
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tokens.unique();
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std::list< std::string >::const_iterator token;
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for ( token= tokens.begin(); token != tokens.end(); token++ ) {
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if ( (*token).find("color=", 0) != std::string::npos ) {
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size_t s= (*token).find_first_of('=');
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std::string c= (*token).substr(s + 1, (*token).length());
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if ( !c.empty() )
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std::swap(color, c);
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}
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else if ( (*token).find("offsetx=", 0) != std::string::npos ) {
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size_t s= (*token).find_first_of('=');
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FB_istringstream o((*token).substr(s + 1, (*token).length()));
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if ( !o.eof() ) {
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o >> offx;
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}
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}
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else if ( (*token).find("offsety=", 0) != std::string::npos ) {
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size_t s= (*token).find_first_of('=');
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FB_istringstream o((*token).substr(s + 1, (*token).length()));
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if ( !o.eof() ) {
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o >> offy;
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}
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}
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}
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return 1;
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};
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}; // end nameless namespace
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namespace FbTk {
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bool Font::m_multibyte = false;
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bool Font::m_utf8mode = false;
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// some initialisation for using fonts
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void fontInit() {
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setlocale(LC_CTYPE, "");
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}
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Font::Font(const char *name, bool antialias):
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m_fontimp(0),
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m_antialias(false), m_rotated(false),
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m_shadow(false), m_shadow_color("#000000"),
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m_shadow_offx(1), m_shadow_offy(1),
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m_halo(false), m_halo_color("#ffffff") {
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#ifdef HAVE_ICONV
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m_iconv = (iconv_t)(-1);
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#else
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m_iconv = -1;
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#endif // HAVE_ICONV
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// MB_CUR_MAX returns the size of a char in the current locale
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if (MB_CUR_MAX > 1) // more than one byte, then we're multibyte
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m_multibyte = true;
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// check for utf-8 mode
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#ifdef CODESET
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char *locale_codeset = nl_langinfo(CODESET);
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#else // openbsd doesnt have this (yet?)
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char *locale_codeset = 0;
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#endif // CODESET
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if (locale_codeset && strcmp("UTF-8", locale_codeset) == 0) {
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m_utf8mode = true;
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} else if (locale_codeset != 0) {
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// if locale isn't UTF-8 we try to
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// create a iconv pointer so we can
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// convert non utf-8 strings to utf-8
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#ifdef DEBUG
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cerr<<"FbTk::Font: check UTF-8 convert for codeset = "<<locale_codeset<<endl;
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#endif // DEBUG
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#ifdef HAVE_ICONV
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m_iconv = iconv_open("UTF-8", locale_codeset);
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if(m_iconv == (iconv_t)(-1)) {
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cerr<<"FbTk::Font: code error: from "<<locale_codeset<<" to: UTF-8"<<endl;
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// if we failed with iconv then we can't convert
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// the strings to utf-8, so we disable utf8 mode
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m_utf8mode = false;
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} else {
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// success, we can now enable utf8mode
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// and if antialias is on later we can recode
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// the non utf-8 string to utf-8 and use utf-8
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// drawing functions
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m_utf8mode = true;
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}
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#endif // HAVE_ICONV
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}
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#ifdef DEBUG
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cerr<<"FbTk::Font m_iconv = "<<(int)m_iconv<<endl;
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#endif // DEBUG
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// create the right font implementation
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// antialias is prio 1
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#ifdef USE_XFT
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if (antialias) {
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m_fontimp.reset(new XftFontImp(0, m_utf8mode));
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m_antialias = true;
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}
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#endif //USE_XFT
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// if we didn't create a Xft font then create basic font
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if (m_fontimp.get() == 0) {
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#ifdef USE_XMB
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if (m_multibyte || m_utf8mode)
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m_fontimp.reset(new XmbFontImp(0, m_utf8mode));
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else // basic font implementation
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#endif // USE_XMB
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m_fontimp.reset(new XFontImp());
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}
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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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#ifdef HAVE_ICONV
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if (m_iconv != (iconv_t)(-1))
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iconv_close(m_iconv);
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#endif // HAVE_ICONV
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}
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void Font::setAntialias(bool flag) {
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bool loaded = m_fontimp->loaded();
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#ifdef USE_XFT
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if (flag && !isAntialias() && !m_rotated) {
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m_fontimp.reset(new XftFontImp(m_fontstr.c_str(), m_utf8mode));
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} else if (!flag && isAntialias())
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#endif // USE_XFT
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{
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#ifdef USE_XMB
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if (m_multibyte || m_utf8mode)
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m_fontimp.reset(new XmbFontImp(m_fontstr.c_str(), m_utf8mode));
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else
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#endif // USE_XMB
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m_fontimp.reset(new XFontImp(m_fontstr.c_str()));
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}
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if (m_fontimp->loaded() != loaded) { // if the new font failed to load, fall back to 'fixed'
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if (!m_fontimp->load("fixed")) {// if that failes too, output warning
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_FB_USES_NLS;
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cerr<<_FBTKTEXT(Error, CantFallbackFont, "Warning: can't load fallback font", "Attempt to load the last-resort default font failed")<<" 'fixed'."<<endl;
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}
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}
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m_antialias = flag;
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}
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bool Font::load(const std::string &name) {
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if (name.size() == 0)
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return false;
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m_shadow = false;
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m_halo = false;
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// everything after ':' is a fontoption
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// -> extract 'halo' and 'shadow' and
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// load remaining fname
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size_t sep= name.find_first_of(':');
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if ( sep != std::string::npos ) {
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std::list< std::string > tokens;
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std::string fname;
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fname= std::string(name.c_str(), sep + 1);
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FbTk::StringUtil::stringtok(tokens, name.substr(sep + 1, name.length()), ",");
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tokens.unique();
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bool firstone= true;
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std::list< std::string >::const_iterator token;
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// check tokens and extract extraoptions for halo and shadow
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for( token= tokens.begin(); token != tokens.end(); token++ ) {
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if ( (*token).find("halo",0) != std::string::npos ) {
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m_halo= true;
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extract_halo_options(*token, m_halo_color);
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}
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else if ( (*token).find("shadow", 0) != std::string::npos ) {
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m_shadow= true;
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extract_shadow_options(*token, m_shadow_color, m_shadow_offx, m_shadow_offy);
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}
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else {
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if ( !firstone )
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fname+= ", ";
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else
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firstone= false;
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fname= fname + *token;
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}
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}
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m_fontstr = fname;
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} else
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m_fontstr = name;
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return m_fontimp->load(m_fontstr.c_str());
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}
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unsigned int Font::textWidth(const char * const text, unsigned int size) const {
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#ifdef HAVE_ICONV
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if (m_iconv != (iconv_t)(-1)) {
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char* rtext = recode(m_iconv, text, size);
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if (rtext != 0)
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size = strlen(rtext);
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unsigned int r = m_fontimp->textWidth(rtext ? rtext : text, size);
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if (rtext != 0)
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delete rtext;
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return r;
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}
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#endif // HAVE_ICONV
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return m_fontimp->textWidth(text, size);
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}
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unsigned int Font::height() const {
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return m_fontimp->height();
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}
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int Font::ascent() const {
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return m_fontimp->ascent();
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}
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int Font::descent() const {
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return m_fontimp->descent();
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}
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void Font::drawText(Drawable w, int screen, GC gc,
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const char *text, size_t len, int x, int y,
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bool rotate) const {
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if (text == 0 || len == 0)
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return;
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char* rtext = 0;
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// so we don't end up in a loop with m_shadow
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static bool first_run = true;
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#ifdef HAVE_ICONV
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if (m_iconv != (iconv_t)(-1) && first_run) {
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rtext = recode(m_iconv, text, len);
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if (rtext != 0) {
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len = strlen(rtext);
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// ok, we can't use utf8 mode since the string is invalid
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}
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}
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#endif // HAVE_ICONV
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const char *real_text = rtext ? rtext : text;
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// draw "effects" first
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if (first_run) {
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if (m_shadow) {
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FbTk::GContext shadow_gc(w);
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shadow_gc.setForeground(FbTk::Color(m_shadow_color.c_str(), screen));
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first_run = false;
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drawText(w, screen, shadow_gc.gc(), real_text, len,
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x + m_shadow_offx, y + m_shadow_offy, rotate);
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first_run = true;
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} else if (m_halo) {
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FbTk::GContext halo_gc(w);
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halo_gc.setForeground(FbTk::Color(m_halo_color.c_str(), screen));
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first_run = false;
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drawText(w, screen, halo_gc.gc(), real_text, len, x + 1, y + 1, rotate);
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drawText(w, screen, halo_gc.gc(), real_text, len, x - 1, y + 1, rotate);
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drawText(w, screen, halo_gc.gc(), real_text, len, x - 1, y - 1, rotate);
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drawText(w, screen, halo_gc.gc(), real_text, len, x + 1, y - 1, rotate);
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first_run = true;
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}
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}
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if (!rotate && isRotated()) {
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// if this was called with request to not rotated the text
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// we just forward it to the implementation that handles rotation
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// currently just XFontImp
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// Using dynamic_cast just temporarly until there's a better solution
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// to put in FontImp
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try {
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XFontImp *font = dynamic_cast<XFontImp *>(m_fontimp.get());
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font->setRotate(false); // disable rotation temporarly
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font->drawText(w, screen, gc, real_text, len, x, y);
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font->setRotate(true); // enable rotation
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} catch (std::bad_cast &bc) {
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// draw normal...
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m_fontimp->drawText(w, screen, gc, real_text, len, x, y);
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}
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} else
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m_fontimp->drawText(w, screen, gc, real_text, len, x, y);
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if (rtext != 0)
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delete rtext;
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}
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void Font::rotate(float angle) {
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#ifdef USE_XFT
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// if we are rotated and we are changing to horiz text
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// and we were antialiased before we rotated then change to XftFontImp
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if (isRotated() && angle == 0 && isAntialias())
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m_fontimp.reset(new XftFontImp(m_fontstr.c_str(), m_utf8mode));
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#endif // USE_XFT
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// change to a font imp that handles rotated fonts (i.e just XFontImp at the moment)
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// if we're going to rotate this font
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if (angle != 0 && isAntialias() && !isRotated()) {
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m_fontimp.reset(new XFontImp(m_fontstr.c_str()));
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if (!m_fontimp->loaded()) // if it failed to load font, try default font fixed
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m_fontimp->load("fixed");
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}
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//Note: only XFontImp implements FontImp::rotate
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m_fontimp->rotate(angle);
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m_rotated = (angle == 0 ? false : true);
|
|
m_angle = angle;
|
|
}
|
|
|
|
|
|
};
|
|
|