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      1 /*
      2  * Copyright (C) 2007 Ryan Leavengood <leavengood (at) gmail.com>
      3  *
      4  * All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     18  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     19  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     20  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     21  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     22  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     23  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     25  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     26  */
     27 
     28 #include "config.h"
     29 #include "Font.h"
     30 
     31 #include "FontData.h"
     32 #include "FontDescription.h"
     33 #include "FontSelector.h"
     34 #include "GraphicsContext.h"
     35 #include "NotImplemented.h"
     36 #include <Font.h>
     37 #include <String.h>
     38 #include <View.h>
     39 
     40 
     41 // FIXME: Temp routine to convert unicode character to UTF8.
     42 int charUnicodeToUTF8HACK(unsigned short glyph, char* out)
     43 {
     44     int i = 0;
     45 
     46     if (glyph < 0x0080)
     47         out[i++] = static_cast<char>(glyph);
     48     else if (glyph < 0x0800) {  // 2 bytes
     49         out[i++] = 0xc0 | (glyph >> 6);
     50         out[i++] = 0x80 | (glyph & 0x3F);
     51     } else if (glyph > 0x0800) {  // 3 bytes
     52         out[i++] = 0xe0 | (glyph >> 12);
     53         out[i++] = 0x80 | ((glyph >> 6) & 0x3F);
     54         out[i++] = 0x80 | (glyph & 0x3F);
     55     }
     56 
     57     out[i] = '\0';
     58     return i;
     59 }
     60 
     61 namespace WebCore {
     62 
     63 bool Font::canReturnFallbackFontsForComplexText()
     64 {
     65     return false;
     66 }
     67 
     68 bool Font::canExpandAroundIdeographsInComplexText()
     69 {
     70     return false;
     71 }
     72 
     73 void Font::drawGlyphs(GraphicsContext* graphicsContext, const SimpleFontData* font,
     74                       const GlyphBuffer& glyphBuffer, int from, int numGlyphs, const FloatPoint& point) const
     75 {
     76     Color color = graphicsContext->fillColor();
     77     BView* view = graphicsContext->platformContext();
     78     BFont* m_font = font->platformData().font();
     79 
     80     graphicsContext->setCompositeOperation(CompositeSourceOver);
     81     view->SetHighColor(color);
     82     view->SetFont(m_font);
     83 
     84     GlyphBufferGlyph* glyphs = const_cast<GlyphBufferGlyph*>(glyphBuffer.glyphs(from));
     85     float offset = point.x();
     86     for (int i = 0; i < numGlyphs; i++) {
     87         char out[4];
     88         charUnicodeToUTF8HACK(glyphs[i], out);
     89 
     90         view->DrawString(out, sizeof(out), BPoint(offset, point.y()));
     91         offset += glyphBuffer.advanceAt(from + i);
     92     }
     93 }
     94 
     95 void Font::drawComplexText(GraphicsContext* ctx, const TextRun& run, const FloatPoint& point,
     96                            int from, int to) const
     97 {
     98     notImplemented();
     99 }
    100 
    101 void Font::drawEmphasisMarksForComplexText(GraphicsContext* /* context */, const TextRun& /* run */, const AtomicString& /* mark */, const FloatPoint& /* point */, int /* from */, int /* to */) const
    102 {
    103     notImplemented();
    104 }
    105 
    106 float Font::floatWidthForComplexText(const TextRun& run, HashSet<const SimpleFontData*>* fallbackFonts, GlyphOverflow* glyphOverflow) const
    107 {
    108     notImplemented();
    109     return 0;
    110 }
    111 
    112 FloatRect Font::selectionRectForComplexText(const TextRun&, const FloatPoint&, int, int, int) const
    113 {
    114     notImplemented();
    115     return FloatRect();
    116 }
    117 
    118 int Font::offsetForPositionForComplexText(const TextRun&, float, bool) const
    119 {
    120     notImplemented();
    121     return 0;
    122 }
    123 
    124 } // namespace WebCore
    125 
    126