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_Armenian = 1,
  33     Script_C1Controls = 12,
  34     Script_Coptic = 13,
  35     Script_Cyrillic = 16,
  36     Script_Greek = 23,
  37     Script_Hebrew = 29,
  38     Script_Latin  = 38,
  39     Script_Symbol = 77,
  40     Script_Unknown = (UINT16)-1
  41 };
  42
  43 struct script_range {
  44     UINT16 script;
  45     DWORD first;
  46     DWORD last;
  47 };
  48
  49 static const struct script_range script_ranges[] = {
  50     /* C0 Controls: U+0000–U+001F */
  51     /* ASCII punctuation and symbols: U+0020–U+002F */
  52     /* ASCII digits: U+0030–U+0039 */
  53     /* ASCII punctuation and symbols: U+003A–U+0040 */
  54     { Script_Symbol, 0x00, 0x040 },
  55     /* Latin uppercase: U+0041–U+005A */
  56     { Script_Latin, 0x41, 0x5a },
  57     /* ASCII punctuation and symbols: U+005B–U+0060 */
  58     { Script_Symbol, 0x5b, 0x060 },
  59     /* Latin lowercase: U+0061–U+007A */
  60     { Script_Latin, 0x61, 0x7a },
  61     /* ASCII punctuation and symbols, control char DEL: U+007B–U+007F */
  62     { Script_Symbol, 0x7b, 0x7f },
  63     /* C1 Controls: U+0080–U+009F */
  64     { Script_C1Controls, 0x80, 0x9f },
  65     /* Latin-1 Supplement: U+00A0–U+00FF */
  66     /* Latin Extended-A: U+0100–U+017F */
  67     /* Latin Extended-B: U+0180–U+024F */
  68     /* IPA Extensions: U+0250–U+02AF */
  69     /* Spacing Modifier Letters: U+02B0–U+02FF */
  70     { Script_Latin, 0xa0, 0x2ff },
  71     /* Combining Diacritical Marks: U+0300–U+036F */
  72     { Script_Symbol, 0x300, 0x36f },
  73     /* Greek: U+0370–U+03E1 */
  74     { Script_Greek, 0x370, 0x3e1 },
  75     /* Coptic: U+03E2–U+03Ef */
  76     { Script_Coptic, 0x3e2, 0x3ef },
  77     /* Greek: U+03F0–U+03FF */
  78     { Script_Greek, 0x3f0, 0x3ff },
  79     /* Cyrillic: U+0400–U+04FF */
  80     /* Cyrillic Supplement: U+0500–U+052F */
  81     /* Cyrillic Supplement range is incomplete cause it's based on Unicode 5.2
  82        that doesn't define some Abkhaz and Azerbaijani letters, we support Unicode 6.0 range here */
  83     { Script_Cyrillic, 0x400, 0x52f },
  84     /* Armenian: U+0530–U+058F */
  85     { Script_Armenian, 0x530, 0x58f },
  86     /* Hebrew: U+0590–U+05FF */
  87     { Script_Hebrew, 0x590, 0x5ff },
  88     /* Arabic: U+0600–U+06FF */
  89     { Script_Arabic, 0x600, 0x6ff },
  90     /* unsupported range */
  91     { Script_Unknown }
  92 };
  93
  94 static UINT16 get_char_script( WCHAR c )
  95 {
  96     DWORD ch = c;
  97     int i;
  98
  99     for (i = 0; i < sizeof(script_ranges)/sizeof(struct script_range); i++)
 100     {
 101         const struct script_range *range = &script_ranges[i];
 102         if (range->script == Script_Unknown || (range->first <= ch && range->last >= ch))
 103             return range->script;
 104     }
 105
 106     return Script_Unknown;
 107 }
 108
 109 static HRESULT analyze_script(const WCHAR *text, UINT32 len, IDWriteTextAnalysisSink *sink)
 110 {
 111     DWRITE_SCRIPT_ANALYSIS sa;
 112     UINT32 pos, i, length;
 113
 114     if (!len) return S_OK;
 115
 116     sa.script = get_char_script(*text);
 117     sa.shapes = DWRITE_SCRIPT_SHAPES_DEFAULT;
 118
 119     pos = 0;
 120     length = 1;
 121
 122     for (i = 1; i < len; i++)
 123     {
 124         UINT16 script = get_char_script(text[i]);
 125
 126         /* Script_Latin_Symb script type is ignored when preceded or followed by another script */
 127         if (sa.script == Script_Symbol) sa.script = script;
 128         if (script    == Script_Symbol) script = sa.script;
 129         /* this is a length of a sequence to be reported next */
 130         if (sa.script == script) length++;
 131
 132         if (sa.script != script)
 133         {
 134             HRESULT hr = IDWriteTextAnalysisSink_SetScriptAnalysis(sink, pos, length, &sa);
 135             if (FAILED(hr)) return hr;
 136             pos = i;
 137             length = 1;
 138             sa.script = script;
 139         }
 140     }
 141
 142     /* 1 length case or normal completion call */
 143     return IDWriteTextAnalysisSink_SetScriptAnalysis(sink, pos, length, &sa);
 144 }
 145
 146 static HRESULT WINAPI dwritetextanalyzer_QueryInterface(IDWriteTextAnalyzer *iface, REFIID riid, void **obj)
 147 {
 148     TRACE("(%s %p)\n", debugstr_guid(riid), obj);
 149
 150     if (IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IDWriteTextAnalyzer))
 151     {
 152         *obj = iface;
 153         return S_OK;
 154     }
 155
 156     *obj = NULL;
 157     return E_NOINTERFACE;
 158
 159 }
 160
 161 static ULONG WINAPI dwritetextanalyzer_AddRef(IDWriteTextAnalyzer *iface)
 162 {
 163     return 2;
 164 }
 165
 166 static ULONG WINAPI dwritetextanalyzer_Release(IDWriteTextAnalyzer *iface)
 167 {
 168     return 1;
 169 }
 170
 171 static HRESULT WINAPI dwritetextanalyzer_AnalyzeScript(IDWriteTextAnalyzer *iface,
 172     IDWriteTextAnalysisSource* source, UINT32 position, UINT32 length, IDWriteTextAnalysisSink* sink)
 173 {
 174     const WCHAR *text;
 175     HRESULT hr;
 176     UINT32 len;
 177
 178     TRACE("(%p %u %u %p)\n", source, position, length, sink);
 179
 180     hr = IDWriteTextAnalysisSource_GetTextAtPosition(source, position, &text, &len);
 181     if (FAILED(hr)) return hr;
 182
 183     return analyze_script(text, len, sink);
 184 }
 185
 186 static HRESULT WINAPI dwritetextanalyzer_AnalyzeBidi(IDWriteTextAnalyzer *iface,
 187     IDWriteTextAnalysisSource* source, UINT32 position, UINT32 length, IDWriteTextAnalysisSink* sink)
 188 {
 189     FIXME("(%p %u %u %p): stub\n", source, position, length, sink);
 190     return E_NOTIMPL;
 191 }
 192
 193 static HRESULT WINAPI dwritetextanalyzer_AnalyzeNumberSubstitution(IDWriteTextAnalyzer *iface,
 194     IDWriteTextAnalysisSource* source, UINT32 position, UINT32 length, IDWriteTextAnalysisSink* sink)
 195 {
 196     FIXME("(%p %u %u %p): stub\n", source, position, length, sink);
 197     return E_NOTIMPL;
 198 }
 199
 200 static HRESULT WINAPI dwritetextanalyzer_AnalyzeLineBreakpoints(IDWriteTextAnalyzer *iface,
 201     IDWriteTextAnalysisSource* source, UINT32 position, UINT32 length, IDWriteTextAnalysisSink* sink)
 202 {
 203     FIXME("(%p %u %u %p): stub\n", source, position, length, sink);
 204     return E_NOTIMPL;
 205 }
 206
 207 static HRESULT WINAPI dwritetextanalyzer_GetGlyphs(IDWriteTextAnalyzer *iface,
 208     WCHAR const* text, UINT32 length, IDWriteFontFace* font_face, BOOL is_sideways,
 209     BOOL is_rtl, DWRITE_SCRIPT_ANALYSIS const* analysis, WCHAR const* locale,
 210     IDWriteNumberSubstitution* substitution, DWRITE_TYPOGRAPHIC_FEATURES const** features,
 211     UINT32 const* feature_range_len, UINT32 feature_ranges, UINT32 max_glyph_count,
 212     UINT16* clustermap, DWRITE_SHAPING_TEXT_PROPERTIES* text_props, UINT16* glyph_indices,
 213     DWRITE_SHAPING_GLYPH_PROPERTIES* glyph_props, UINT32* actual_glyph_count)
 214 {
 215     FIXME("(%s:%u %p %d %d %p %s %p %p %p %u %u %p %p %p %p %p): stub\n", debugstr_wn(text, length),
 216         length, font_face, is_sideways, is_rtl, analysis, debugstr_w(locale), substitution, features, feature_range_len,
 217         feature_ranges, max_glyph_count, clustermap, text_props, glyph_indices, glyph_props, actual_glyph_count);
 218     return E_NOTIMPL;
 219 }
 220
 221 static HRESULT WINAPI dwritetextanalyzer_GetGlyphPlacements(IDWriteTextAnalyzer *iface,
 222     WCHAR const* text, UINT16 const* clustermap, DWRITE_SHAPING_TEXT_PROPERTIES* props,
 223     UINT32 text_len, UINT16 const* glyph_indices, DWRITE_SHAPING_GLYPH_PROPERTIES const* glyph_props,
 224     UINT32 glyph_count, IDWriteFontFace * font_face, FLOAT fontEmSize, BOOL is_sideways, BOOL is_rtl,
 225     DWRITE_SCRIPT_ANALYSIS const* analysis, WCHAR const* locale, DWRITE_TYPOGRAPHIC_FEATURES const** features,
 226     UINT32 const* feature_range_len, UINT32 feature_ranges, FLOAT* glyph_advances, DWRITE_GLYPH_OFFSET* glyph_offsets)
 227 {
 228     FIXME("(%s %p %p %u %p %p %u %p %f %d %d %p %s %p %p %u %p %p): stub\n", debugstr_w(text),
 229         clustermap, props, text_len, glyph_indices, glyph_props, glyph_count, font_face, fontEmSize, is_sideways,
 230         is_rtl, analysis, debugstr_w(locale), features, feature_range_len, feature_ranges, glyph_advances, glyph_offsets);
 231     return E_NOTIMPL;
 232 }
 233
 234 static HRESULT WINAPI dwritetextanalyzer_GetGdiCompatibleGlyphPlacements(IDWriteTextAnalyzer *iface,
 235     WCHAR const* text, UINT16 const* clustermap, DWRITE_SHAPING_TEXT_PROPERTIES* props,
 236     UINT32 text_len, UINT16 const* glyph_indices, DWRITE_SHAPING_GLYPH_PROPERTIES const* glyph_props,
 237     UINT32 glyph_count, IDWriteFontFace * font_face, FLOAT fontEmSize, FLOAT pixels_per_dip,
 238     DWRITE_MATRIX const* transform, BOOL use_gdi_natural, BOOL is_sideways, BOOL is_rtl,
 239     DWRITE_SCRIPT_ANALYSIS const* analysis, WCHAR const* locale, DWRITE_TYPOGRAPHIC_FEATURES const** features,
 240     UINT32 const* feature_range_lengths, UINT32 feature_ranges, FLOAT* glyph_advances, DWRITE_GLYPH_OFFSET* glyph_offsets)
 241 {
 242     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),
 243         clustermap, props, text_len, glyph_indices, glyph_props, glyph_count, font_face, fontEmSize, pixels_per_dip,
 244         transform, use_gdi_natural, is_sideways, is_rtl, analysis, debugstr_w(locale), features, feature_range_lengths,
 245         feature_ranges, glyph_advances, glyph_offsets);
 246     return E_NOTIMPL;
 247 }
 248
 249 static const struct IDWriteTextAnalyzerVtbl textanalyzervtbl = {
 250     dwritetextanalyzer_QueryInterface,
 251     dwritetextanalyzer_AddRef,
 252     dwritetextanalyzer_Release,
 253     dwritetextanalyzer_AnalyzeScript,
 254     dwritetextanalyzer_AnalyzeBidi,
 255     dwritetextanalyzer_AnalyzeNumberSubstitution,
 256     dwritetextanalyzer_AnalyzeLineBreakpoints,
 257     dwritetextanalyzer_GetGlyphs,
 258     dwritetextanalyzer_GetGlyphPlacements,
 259     dwritetextanalyzer_GetGdiCompatibleGlyphPlacements
 260 };
 261
 262 static IDWriteTextAnalyzer textanalyzer = { &textanalyzervtbl };
 263
 264 HRESULT get_textanalyzer(IDWriteTextAnalyzer **ret)
 265 {
 266     *ret = &textanalyzer;
 267     return S_OK;
 268 }