third_party/WebKit/Source/platform/fonts/SegmentedFontData.cpp

   1 /*
   2  * Copyright (C) 2008, 2009 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 "platform/fonts/SegmentedFontData.h"
  28
  29 #include "platform/fonts/SimpleFontData.h"
  30 #include "wtf/Assertions.h"
  31 #include "wtf/text/WTFString.h"
  32
  33 namespace blink {
  34
  35 SegmentedFontData::~SegmentedFontData()
  36 {
  37     GlyphPageTreeNode::pruneTreeCustomFontData(this);
  38 }
  39
  40 const SimpleFontData* SegmentedFontData::fontDataForCharacter(UChar32 c) const
  41 {
  42     Vector<FontDataRange>::const_iterator end = m_ranges.end();
  43     for (Vector<FontDataRange>::const_iterator it = m_ranges.begin(); it != end; ++it) {
  44         if (it->from() <= c && it->to() >= c)
  45             return it->fontData().get();
  46     }
  47     return m_ranges[0].fontData().get();
  48 }
  49
  50 bool SegmentedFontData::containsCharacter(UChar32 c) const
  51 {
  52     Vector<FontDataRange>::const_iterator end = m_ranges.end();
  53     for (Vector<FontDataRange>::const_iterator it = m_ranges.begin(); it != end; ++it) {
  54         if (c >= it->from() && c <= it->to())
  55             return true;
  56     }
  57     return false;
  58 }
  59
  60 bool SegmentedFontData::isCustomFont() const
  61 {
  62     // All segmented fonts are custom fonts.
  63     return true;
  64 }
  65
  66 bool SegmentedFontData::isLoading() const
  67 {
  68     Vector<FontDataRange>::const_iterator end = m_ranges.end();
  69     for (Vector<FontDataRange>::const_iterator it = m_ranges.begin(); it != end; ++it) {
  70         if (it->fontData()->isLoading())
  71             return true;
  72     }
  73     return false;
  74 }
  75
  76 // Returns true if any of the sub fonts are loadingFallback.
  77 bool SegmentedFontData::isLoadingFallback() const
  78 {
  79     Vector<FontDataRange>::const_iterator end = m_ranges.end();
  80     for (Vector<FontDataRange>::const_iterator it = m_ranges.begin(); it != end; ++it) {
  81         if (it->fontData()->isLoadingFallback())
  82             return true;
  83     }
  84     return false;
  85 }
  86
  87 bool SegmentedFontData::isSegmented() const
  88 {
  89     return true;
  90 }
  91
  92 bool SegmentedFontData::shouldSkipDrawing() const
  93 {
  94     Vector<FontDataRange>::const_iterator end = m_ranges.end();
  95     for (Vector<FontDataRange>::const_iterator it = m_ranges.begin(); it != end; ++it) {
  96         if (it->fontData()->shouldSkipDrawing())
  97             return true;
  98     }
  99     return false;
 100 }
 101
 102 } // namespace blink