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author | claireho <chinglanho@gmail.com> | 2011-10-11 13:28:10 -0700 |
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committer | claireho <chinglanho@gmail.com> | 2011-10-11 17:17:36 -0700 |
commit | d7a8fefd0e472b1a70e651ae5b43b94e9a4bd976 (patch) | |
tree | 5925a21c3148dc01da87d36c7e6df92004cc68ad /Source/WebCore/platform/graphics/android/VerticalTextMap.cpp | |
parent | 6453761f63c04897066bb40bf7d9e0c8daac1a98 (diff) | |
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Fallback handle if vertical glyphs are missing.
Bug 5094208 : browser VerticalWritingMode support.
Some punctuation has to change its glyph in vertical writing mode.
For example, dash in vertical text is a vertical bar. In
current Android system fonts and fallback fonts, none of them have the
substitute tables for vertical writing mode. We call a conversion
function that converts the punctuation to the Unicode Vertical Form
(0xFE10 - 0xFE19) or to the closest glyphs as alternative when
vertical substitute tables are absent in fonts. Otherwise, we use
Harfbuzz to do the vertical glyph shapping.
Change-Id: If1d31bb72aaaba45ed50bbb75d6246cfa30e3428
Diffstat (limited to 'Source/WebCore/platform/graphics/android/VerticalTextMap.cpp')
-rw-r--r-- | Source/WebCore/platform/graphics/android/VerticalTextMap.cpp | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/Source/WebCore/platform/graphics/android/VerticalTextMap.cpp b/Source/WebCore/platform/graphics/android/VerticalTextMap.cpp new file mode 100644 index 0000000..2bb008f --- /dev/null +++ b/Source/WebCore/platform/graphics/android/VerticalTextMap.cpp @@ -0,0 +1,104 @@ +/* + * Copyright 2011, The Android Open Source Project + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * * Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * * Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, + * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT + * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include "VerticalTextMap.h" + +#include <wtf/Forward.h> +#include <wtf/MessageQueue.h> +#include <wtf/PassRefPtr.h> +#include <wtf/RefPtr.h> + +static const UChar vTextCnvTable[][2] = { + // TODO: uncomment mappings once we add glyphs for vertical forms. + // {0x0021, 0xfe15}, // exclamation mark + {0x0028, 0xfe35}, // left paren + {0x0029, 0xfe36}, // right paren + // {0x002c, 0xfe10}, // comma + {0x003a, 0xfe30}, // colon + {0x003b, 0x007c}, // hyphen + // {0x003f, 0xfe16}, // question mark + // {0x005b, 0xfe14}, // semicolon + {0x005d, 0xfe47}, // left square bracket + {0x005f, 0xfe48}, // right square bracket + {0x007b, 0xfe37}, // left curly bracket + {0x007d, 0xfe38}, // right curly bracket + {0x007e, 0x007c}, // tilde to vertical line + {0x2013, 0xfe32}, // en dash + {0x2014, 0xfe31}, // em dash + {0x2015, 0xfe31}, // horizontal bar + {0x2025, 0xfe30}, // two dot leader + // TODO: change the mapping 0x2026 -> 0xFE19 once Android has the glyph for 0xFE19. + {0x2026, 0xfe30}, // three dot leader + // {0x3001, 0xfe11}, // Ideographic comma + // {0x3002, 0xfe12}, // Ideographic full stop + {0x3008, 0xfe3f}, // left angle bracket + {0x3009, 0xfe40}, // right angle bracket + {0x300a, 0xfe3d}, // left double angle bracket + {0x300b, 0xfe3e}, // right double angle bracket + {0x300c, 0xfe41}, // left corner bracket + {0x300d, 0xfe42}, // right corner bracket + {0x300e, 0xfe43}, // left white corner bracket + {0x300f, 0xfe44}, // right white corner bracket + {0x3010, 0xfe3b}, // left black lenticular bracket + {0x3011, 0xfe3c}, // right black lenticular bracket + {0x3014, 0xfe39}, // left black lenticular bracket + {0x3015, 0xfe3a}, // right tortise shell bracket + // {0x3016, 0xfe17}, // left white lenticular bracket + // {0x3017, 0xfe18}, // right white lenticular bracket + // {0x3019, 0xfe19}, // horizontal ellipses + {0x30fc, 0x3021}, // prolonged sound + {0xfe4f, 0xfe34}, // wavy low line + {0xff08, 0xfe35}, // full width left paren + {0xff09, 0xfe36}, // full width right paren + {0xff3b, 0xfe47}, // full width left square bracket + {0xff3d, 0xfe48}, // full width right square bracket + {0xff5b, 0xfe37}, // full width left curly bracket + {0xff5d, 0xfe38}, // full width right curly bracket + // {0xff64, 0xfe11}, // halfwidth ideo comma + // {0xff61, 0xfe12}, // halfwidth ideo full stop +}; + +using namespace android; + +namespace WebCore { + +static WTF::Mutex m_verticalTextHashMapMutex; +static HashMap<UChar, UChar>* verticalTextHashMap = 0; + +UChar VerticalTextMap::getVerticalForm(UChar c) { + { + MutexLocker lock(m_verticalTextHashMapMutex); + if (!verticalTextHashMap) { + // Lazy initialization. + verticalTextHashMap = new HashMap<UChar, UChar>; + for (size_t i = 0; i < WTF_ARRAY_LENGTH(vTextCnvTable); ++i) + verticalTextHashMap->set(vTextCnvTable[i][0], vTextCnvTable[i][1]); + } + } + return verticalTextHashMap->get(c); +} + +} |