git.oblomov.eu Git - wine/blob - dlls/dwrite/analyzer.c

   1 /*
   2  *    Text analyzer
   3  *
   4  * Copyright 2012 Nikolay Sivov for CodeWeavers
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #define COBJMACROS
  22
  23 #include "dwrite.h"
  24 #include "dwrite_private.h"
  25
  26 #include "wine/debug.h"
  27
  28 WINE_DEFAULT_DEBUG_CHANNEL(dwrite);
  29
  30 enum scriptcode {
  31     Script_Arabic = 0,
  32     Script_C1Controls = 12,
  33     Script_Coptic = 13,
  34     Script_Cyrillic = 16,
  35     Script_Greek = 23,
  36     Script_Latin  = 38,
  37     Script_Symbol = 77,
  38     Script_Unknown = (UINT16)-1
  39 };
  40
  41 struct script_range {
  42     UINT16 script;
  43     DWORD first;
  44     DWORD last;
  45 };
  46
  47 static const struct script_range script_ranges[] = {
  48     /* C0 Controls: U+0000–U+001F */
  49     /* ASCII punctuation and symbols: U+0020–U+002F */
  50     /* ASCII digits: U+0030–U+0039 */
  51     /* ASCII punctuation and symbols: U+003A–U+0040 */
  52     { Script_Symbol, 0x00, 0x040 },
  53     /* Latin uppercase: U+0041–U+005A */
  54     { Script_Latin, 0x41, 0x5a },
  55     /* ASCII punctuation and symbols: U+005B–U+0060 */
  56     { Script_Symbol, 0x5b, 0x060 },
  57     /* Latin lowercase: U+0061–U+007A */
  58     { Script_Latin, 0x61, 0x7a },
  59     /* ASCII punctuation and symbols, control char DEL: U+007B–U+007F */
  60     { Script_Symbol, 0x7b, 0x7f },
  61     /* C1 Controls: U+0080–U+009F */
  62     { Script_C1Controls, 0x80, 0x9f },
  63     /* Latin-1 Supplement: U+00A0–U+00FF */
  64     /* Latin Extended-A: U+0100–U+017F */
  65     /* Latin Extended-B: U+0180–U+024F */
  66     /* IPA Extensions: U+0250–U+02AF */
  67     /* Spacing Modifier Letters: U+02B0–U+02FF */
  68     { Script_Latin, 0xa0, 0x2ff },
  69     /* Combining Diacritical Marks: U+0300–U+036F */
  70     { Script_Symbol, 0x300, 0x36f },
  71     /* Greek: U+0370–U+03E1 */
  72     { Script_Greek, 0x370, 0x3e1 },
  73     /* Coptic: U+03E2–U+03Ef */
  74     { Script_Coptic, 0x3e2, 0x3ef },
  75     /* Greek: U+03F0–U+03FF */
  76     { Script_Greek, 0x3f0, 0x3ff },
  77     /* Cyrillic: U+0400–U+04FF */
  78     /* Cyrillic Supplement: U+0500–U+052F */
  79     /* Cyrillic Supplement range is incomplete cause it's based on Unicode 5.2
  80        that doesn't define some Abkhaz and Azerbaijani letters, we support Unicode 6.0 range here */
  81     { Script_Cyrillic, 0x400, 0x52f },
  82     /* Arabic: U+0600–U+06FF */
  83     { Script_Arabic, 0x600, 0x6ef },
  84     /* unsupported range */
  85     { Script_Unknown }
  86 };
  87
  88 static UINT16 get_char_script( WCHAR c )
  89 {
  90     DWORD ch = c;
  91     int i;
  92
  93     for (i = 0; i < sizeof(script_ranges)/sizeof(struct script_range); i++)
  94     {
  95         const struct script_range *range = &script_ranges[i];
  96         if (range->script == Script_Unknown || (range->first <= ch && range->last >= ch))
  97             return range->script;
  98     }
  99
 100     return Script_Unknown;
 101 }
 102
 103 static HRESULT analyze_script(const WCHAR *text, UINT32 len, IDWriteTextAnalysisSink *sink)
 104 {
 105     DWRITE_SCRIPT_ANALYSIS sa;
 106     UINT32 pos, i, length;
 107
 108     if (!len) return S_OK;
 109
 110     sa.script = get_char_script(*text);
 111     sa.shapes = DWRITE_SCRIPT_SHAPES_DEFAULT;
 112
 113     pos = 0;
 114     length = 1;
 115
 116     for (i = 1; i < len; i++)
 117     {
 118         UINT16 script = get_char_script(text[i]);
 119
 120         /* Script_Latin_Symb script type is ignored when preceded or followed by another script */
 121         if (sa.script == Script_Symbol) sa.script = script;
 122         if (script    == Script_Symbol) script = sa.script;
 123         /* this is a length of a sequence to be reported next */
 124         if (sa.script == script) length++;
 125
 126         if (sa.script != script)
 127         {
 128             HRESULT hr = IDWriteTextAnalysisSink_SetScriptAnalysis(sink, pos, length, &sa);
 129             if (FAILED(hr)) return hr;
 130             pos = i;
 131             length = 1;
 132             sa.script = script;
 133         }
 134     }
 135
 136     /* 1 length case or normal completion call */
 137     return IDWriteTextAnalysisSink_SetScriptAnalysis(sink, pos, length, &sa);
 138 }
 139
 140 static HRESULT WINAPI dwritetextanalyzer_QueryInterface(IDWriteTextAnalyzer *iface, REFIID riid, void **obj)
 141 {
 142     TRACE("(%s %p)\n", debugstr_guid(riid), obj);
 143
 144     if (IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IDWriteTextAnalyzer))
 145     {
 146         *obj = iface;
 147         return S_OK;
 148     }
 149
 150     *obj = NULL;
 151     return E_NOINTERFACE;
 152
 153 }
 154
 155 static ULONG WINAPI dwritetextanalyzer_AddRef(IDWriteTextAnalyzer *iface)
 156 {
 157     return 2;
 158 }
 159
 160 static ULONG WINAPI dwritetextanalyzer_Release(IDWriteTextAnalyzer *iface)
 161 {
 162     return 1;
 163 }
 164
 165 static HRESULT WINAPI dwritetextanalyzer_AnalyzeScript(IDWriteTextAnalyzer *iface,
 166     IDWriteTextAnalysisSource* source, UINT32 position, UINT32 length, IDWriteTextAnalysisSink* sink)
 167 {
 168     const WCHAR *text;
 169     HRESULT hr;
 170     UINT32 len;
 171
 172     TRACE("(%p %u %u %p)\n", source, position, length, sink);
 173
 174     hr = IDWriteTextAnalysisSource_GetTextAtPosition(source, position, &text, &len);
 175     if (FAILED(hr)) return hr;
 176
 177     return analyze_script(text, len, sink);
 178 }
 179
 180 static HRESULT WINAPI dwritetextanalyzer_AnalyzeBidi(IDWriteTextAnalyzer *iface,
 181     IDWriteTextAnalysisSource* source, UINT32 position, UINT32 length, IDWriteTextAnalysisSink* sink)
 182 {
 183     FIXME("(%p %u %u %p): stub\n", source, position, length, sink);
 184     return E_NOTIMPL;
 185 }
 186
 187 static HRESULT WINAPI dwritetextanalyzer_AnalyzeNumberSubstitution(IDWriteTextAnalyzer *iface,
 188     IDWriteTextAnalysisSource* source, UINT32 position, UINT32 length, IDWriteTextAnalysisSink* sink)
 189 {
 190     FIXME("(%p %u %u %p): stub\n", source, position, length, sink);
 191     return E_NOTIMPL;
 192 }
 193
 194 static HRESULT WINAPI dwritetextanalyzer_AnalyzeLineBreakpoints(IDWriteTextAnalyzer *iface,
 195     IDWriteTextAnalysisSource* source, UINT32 position, UINT32 length, IDWriteTextAnalysisSink* sink)
 196 {
 197     FIXME("(%p %u %u %p): stub\n", source, position, length, sink);
 198     return E_NOTIMPL;
 199 }
 200
 201 static HRESULT WINAPI dwritetextanalyzer_GetGlyphs(IDWriteTextAnalyzer *iface,
 202     WCHAR const* text, UINT32 length, IDWriteFontFace* font_face, BOOL is_sideways,
 203     BOOL is_rtl, DWRITE_SCRIPT_ANALYSIS const* analysis, WCHAR const* locale,
 204     IDWriteNumberSubstitution* substitution, DWRITE_TYPOGRAPHIC_FEATURES const** features,
 205     UINT32 const* feature_range_len, UINT32 feature_ranges, UINT32 max_glyph_count,
 206     UINT16* clustermap, DWRITE_SHAPING_TEXT_PROPERTIES* text_props, UINT16* glyph_indices,
 207     DWRITE_SHAPING_GLYPH_PROPERTIES* glyph_props, UINT32* actual_glyph_count)
 208 {
 209     FIXME("(%s:%u %p %d %d %p %s %p %p %p %u %u %p %p %p %p %p): stub\n", debugstr_wn(text, length),
 210         length, font_face, is_sideways, is_rtl, analysis, debugstr_w(locale), substitution, features, feature_range_len,
 211         feature_ranges, max_glyph_count, clustermap, text_props, glyph_indices, glyph_props, actual_glyph_count);
 212     return E_NOTIMPL;
 213 }
 214
 215 static HRESULT WINAPI dwritetextanalyzer_GetGlyphPlacements(IDWriteTextAnalyzer *iface,
 216     WCHAR const* text, UINT16 const* clustermap, DWRITE_SHAPING_TEXT_PROPERTIES* props,
 217     UINT32 text_len, UINT16 const* glyph_indices, DWRITE_SHAPING_GLYPH_PROPERTIES const* glyph_props,
 218     UINT32 glyph_count, IDWriteFontFace * font_face, FLOAT fontEmSize, BOOL is_sideways, BOOL is_rtl,
 219     DWRITE_SCRIPT_ANALYSIS const* analysis, WCHAR const* locale, DWRITE_TYPOGRAPHIC_FEATURES const** features,
 220     UINT32 const* feature_range_len, UINT32 feature_ranges, FLOAT* glyph_advances, DWRITE_GLYPH_OFFSET* glyph_offsets)
 221 {
 222     FIXME("(%s %p %p %u %p %p %u %p %f %d %d %p %s %p %p %u %p %p): stub\n", debugstr_w(text),
 223         clustermap, props, text_len, glyph_indices, glyph_props, glyph_count, font_face, fontEmSize, is_sideways,
 224         is_rtl, analysis, debugstr_w(locale), features, feature_range_len, feature_ranges, glyph_advances, glyph_offsets);
 225     return E_NOTIMPL;
 226 }
 227
 228 static HRESULT WINAPI dwritetextanalyzer_GetGdiCompatibleGlyphPlacements(IDWriteTextAnalyzer *iface,
 229     WCHAR const* text, UINT16 const* clustermap, DWRITE_SHAPING_TEXT_PROPERTIES* props,
 230     UINT32 text_len, UINT16 const* glyph_indices, DWRITE_SHAPING_GLYPH_PROPERTIES const* glyph_props,
 231     UINT32 glyph_count, IDWriteFontFace * font_face, FLOAT fontEmSize, FLOAT pixels_per_dip,
 232     DWRITE_MATRIX const* transform, BOOL use_gdi_natural, BOOL is_sideways, BOOL is_rtl,
 233     DWRITE_SCRIPT_ANALYSIS const* analysis, WCHAR const* locale, DWRITE_TYPOGRAPHIC_FEATURES const** features,
 234     UINT32 const* feature_range_lengths, UINT32 feature_ranges, FLOAT* glyph_advances, DWRITE_GLYPH_OFFSET* glyph_offsets)
 235 {
 236     FIXME("(%s %p %p %u %p %p %u %p %f %f %p %d %d %d %p %s %p %p %u %p %p): stub\n", debugstr_w(text),
 237         clustermap, props, text_len, glyph_indices, glyph_props, glyph_count, font_face, fontEmSize, pixels_per_dip,
 238         transform, use_gdi_natural, is_sideways, is_rtl, analysis, debugstr_w(locale), features, feature_range_lengths,
 239         feature_ranges, glyph_advances, glyph_offsets);
 240     return E_NOTIMPL;
 241 }
 242
 243 static const struct IDWriteTextAnalyzerVtbl textanalyzervtbl = {
 244     dwritetextanalyzer_QueryInterface,
 245     dwritetextanalyzer_AddRef,
 246     dwritetextanalyzer_Release,
 247     dwritetextanalyzer_AnalyzeScript,
 248     dwritetextanalyzer_AnalyzeBidi,
 249     dwritetextanalyzer_AnalyzeNumberSubstitution,
 250     dwritetextanalyzer_AnalyzeLineBreakpoints,
 251     dwritetextanalyzer_GetGlyphs,
 252     dwritetextanalyzer_GetGlyphPlacements,
 253     dwritetextanalyzer_GetGdiCompatibleGlyphPlacements
 254 };
 255
 256 static IDWriteTextAnalyzer textanalyzer = { &textanalyzervtbl };
 257
 258 HRESULT get_textanalyzer(IDWriteTextAnalyzer **ret)
 259 {
 260     *ret = &textanalyzer;
 261     return S_OK;
 262 }