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      1 /*
      2  * Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
     14  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     15  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
     17  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
     18  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
     19  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
     20  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
     21  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     22  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     23  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "CSSFontFace.h"
     28 
     29 #include "CSSFontFaceSource.h"
     30 #include "CSSFontSelector.h"
     31 #include "CSSSegmentedFontFace.h"
     32 #include "FontDescription.h"
     33 #include "SimpleFontData.h"
     34 
     35 namespace WebCore {
     36 
     37 CSSFontFace::~CSSFontFace()
     38 {
     39     deleteAllValues(m_sources);
     40 }
     41 
     42 bool CSSFontFace::isLoaded() const
     43 {
     44     unsigned size = m_sources.size();
     45     for (unsigned i = 0; i < size; i++) {
     46         if (!m_sources[i]->isLoaded())
     47             return false;
     48     }
     49     return true;
     50 }
     51 
     52 bool CSSFontFace::isValid() const
     53 {
     54     unsigned size = m_sources.size();
     55     if (!size)
     56         return false;
     57     for (unsigned i = 0; i < size; i++) {
     58         if (m_sources[i]->isValid())
     59             return true;
     60     }
     61     return false;
     62 }
     63 
     64 void CSSFontFace::addedToSegmentedFontFace(CSSSegmentedFontFace* segmentedFontFace)
     65 {
     66     m_segmentedFontFaces.add(segmentedFontFace);
     67 }
     68 
     69 void CSSFontFace::removedFromSegmentedFontFace(CSSSegmentedFontFace* segmentedFontFace)
     70 {
     71     m_segmentedFontFaces.remove(segmentedFontFace);
     72 }
     73 
     74 void CSSFontFace::addSource(CSSFontFaceSource* source)
     75 {
     76     m_sources.append(source);
     77     source->setFontFace(this);
     78 }
     79 
     80 void CSSFontFace::fontLoaded(CSSFontFaceSource* source)
     81 {
     82     if (source != m_activeSource)
     83         return;
     84 
     85     // FIXME: Can we assert that m_segmentedFontFaces is not empty? That may
     86     // require stopping in-progress font loading when the last
     87     // CSSSegmentedFontFace is removed.
     88     if (m_segmentedFontFaces.isEmpty())
     89         return;
     90 
     91     HashSet<CSSSegmentedFontFace*>::iterator end = m_segmentedFontFaces.end();
     92     for (HashSet<CSSSegmentedFontFace*>::iterator it = m_segmentedFontFaces.begin(); it != end; ++it)
     93         (*it)->fontLoaded(this);
     94 
     95     // Use one of the CSSSegmentedFontFaces' font selector. They all have
     96     // the same font selector, so it's wasteful to store it in the CSSFontFace.
     97     CSSFontSelector* fontSelector = (*m_segmentedFontFaces.begin())->fontSelector();
     98     fontSelector->fontLoaded();
     99 }
    100 
    101 SimpleFontData* CSSFontFace::getFontData(const FontDescription& fontDescription, bool syntheticBold, bool syntheticItalic)
    102 {
    103     m_activeSource = 0;
    104     if (!isValid())
    105         return 0;
    106 
    107     ASSERT(!m_segmentedFontFaces.isEmpty());
    108     CSSFontSelector* fontSelector = (*m_segmentedFontFaces.begin())->fontSelector();
    109 
    110     size_t size = m_sources.size();
    111     for (size_t i = 0; i < size; ++i) {
    112         if (SimpleFontData* result = m_sources[i]->getFontData(fontDescription, syntheticBold, syntheticItalic, fontSelector)) {
    113             m_activeSource = m_sources[i];
    114             return result;
    115         }
    116     }
    117 
    118     return 0;
    119 }
    120 
    121 }
    122 
    123