Ben Murdoch | 0019e4e | 2013-07-18 11:57:54 +0100 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 1999 Lars Knoll (knoll@kde.org) |
| 3 | * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved. |
| 4 | * Copyright (C) 2013 Google Inc. All rights reserved. |
| 5 | * |
| 6 | * This library is free software; you can redistribute it and/or |
| 7 | * modify it under the terms of the GNU Library General Public |
| 8 | * License as published by the Free Software Foundation; either |
| 9 | * version 2 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 | * Library General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU Library General Public License |
| 17 | * along with this library; see the file COPYING.LIB. If not, write to |
| 18 | * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, |
| 19 | * Boston, MA 02110-1301, USA. |
| 20 | * |
| 21 | */ |
| 22 | |
| 23 | #include "config.h" |
| 24 | #include "core/css/resolver/FontBuilder.h" |
| 25 | |
| 26 | #include "core/css/CSSCalculationValue.h" |
| 27 | #include "core/css/FontFeatureValue.h" |
| 28 | #include "core/css/FontSize.h" |
| 29 | #include "core/page/Frame.h" |
| 30 | #include "core/page/Settings.h" |
| 31 | #include "core/platform/text/LocaleToScriptMapping.h" |
| 32 | #include "core/rendering/RenderTheme.h" |
| 33 | #include "core/rendering/RenderView.h" |
| 34 | |
| 35 | namespace WebCore { |
| 36 | |
| 37 | // FIXME: This scoping class is a short-term fix to minimize the changes in |
| 38 | // Font-constructing logic. |
| 39 | class FontDescriptionChangeScope { |
| 40 | public: |
| 41 | FontDescriptionChangeScope(FontBuilder* fontBuilder) |
| 42 | : m_fontBuilder(fontBuilder) |
| 43 | , m_fontDescription(fontBuilder->m_style->fontDescription()) |
| 44 | { |
| 45 | } |
| 46 | |
| 47 | void reset() { m_fontDescription = FontDescription(); } |
| 48 | void set(const FontDescription& fontDescription) { m_fontDescription = fontDescription; } |
| 49 | FontDescription& fontDescription() { return m_fontDescription; } |
| 50 | |
| 51 | ~FontDescriptionChangeScope() |
| 52 | { |
| 53 | m_fontBuilder->didChangeFontParameters(m_fontBuilder->m_style->setFontDescription(m_fontDescription)); |
| 54 | } |
| 55 | |
| 56 | private: |
| 57 | FontBuilder* m_fontBuilder; |
| 58 | FontDescription m_fontDescription; |
| 59 | }; |
| 60 | |
| 61 | FontBuilder::FontBuilder() |
| 62 | : m_document(0) |
| 63 | , m_useSVGZoomRules(false) |
| 64 | , m_fontDirty(false) |
| 65 | { |
| 66 | } |
| 67 | |
| 68 | void FontBuilder::initForStyleResolve(const Document* document, RenderStyle* style, bool useSVGZoomRules) |
| 69 | { |
| 70 | // All documents need to be in a frame (and thus have access to Settings) |
| 71 | // for style-resolution to make sense. |
| 72 | // Unfortunately SVG Animations currently violate this: crbug.com/260966 |
| 73 | // ASSERT(m_document->frame()); |
| 74 | m_document = document; |
| 75 | m_useSVGZoomRules = useSVGZoomRules; |
| 76 | m_style = style; |
| 77 | m_fontDirty = false; |
| 78 | } |
| 79 | |
| 80 | void FontBuilder::clear() |
| 81 | { |
| 82 | m_document = 0; |
| 83 | m_style = 0; |
| 84 | m_fontDirty = false; |
| 85 | } |
| 86 | |
| 87 | void FontBuilder::setInitial(float effectiveZoom) |
| 88 | { |
| 89 | ASSERT(m_document->settings()); |
| 90 | FontDescriptionChangeScope scope(this); |
| 91 | |
| 92 | scope.reset(); |
| 93 | scope.fontDescription().setGenericFamily(FontDescription::StandardFamily); |
| 94 | scope.fontDescription().setUsePrinterFont(m_document->printing()); |
| 95 | const AtomicString& standardFontFamily = m_document->settings()->standardFontFamily(); |
| 96 | if (!standardFontFamily.isEmpty()) { |
| 97 | scope.fontDescription().firstFamily().setFamily(standardFontFamily); |
| 98 | scope.fontDescription().firstFamily().appendFamily(0); |
| 99 | } |
| 100 | scope.fontDescription().setKeywordSize(CSSValueMedium - CSSValueXxSmall + 1); |
| 101 | setSize(scope.fontDescription(), effectiveZoom, FontSize::fontSizeForKeyword(m_document, CSSValueMedium, false)); |
| 102 | } |
| 103 | |
| 104 | void FontBuilder::inheritFrom(const FontDescription& fontDescription) |
| 105 | { |
| 106 | FontDescriptionChangeScope scope(this); |
| 107 | |
| 108 | scope.set(fontDescription); |
| 109 | } |
| 110 | |
| 111 | void FontBuilder::didChangeFontParameters(bool changed) |
| 112 | { |
| 113 | m_fontDirty |= changed; |
| 114 | } |
| 115 | |
| 116 | void FontBuilder::fromSystemFont(CSSValueID valueId, float effectiveZoom) |
| 117 | { |
| 118 | FontDescriptionChangeScope scope(this); |
| 119 | |
| 120 | FontDescription fontDescription; |
| 121 | RenderTheme::defaultTheme()->systemFont(valueId, fontDescription); |
| 122 | |
| 123 | // Double-check and see if the theme did anything. If not, don't bother updating the font. |
| 124 | if (!fontDescription.isAbsoluteSize()) |
| 125 | return; |
| 126 | |
| 127 | // Make sure the rendering mode and printer font settings are updated. |
| 128 | const Settings* settings = m_document->settings(); |
| 129 | ASSERT(settings); // If we're doing style resolution, this document should always be in a frame and thus have settings |
| 130 | if (!settings) |
| 131 | return; |
| 132 | fontDescription.setUsePrinterFont(m_document->printing()); |
| 133 | |
| 134 | // Handle the zoom factor. |
| 135 | fontDescription.setComputedSize(getComputedSizeFromSpecifiedSize(fontDescription, effectiveZoom, fontDescription.specifiedSize())); |
| 136 | scope.set(fontDescription); |
| 137 | } |
| 138 | |
| 139 | void FontBuilder::setFontFamilyInitial(float effectiveZoom) |
| 140 | { |
| 141 | FontDescriptionChangeScope scope(this); |
| 142 | |
| 143 | FontDescription initialDesc = FontDescription(); |
| 144 | |
| 145 | // We need to adjust the size to account for the generic family change from monospace to non-monospace. |
| 146 | if (scope.fontDescription().keywordSize() && scope.fontDescription().useFixedDefaultSize()) |
| 147 | setSize(scope.fontDescription(), effectiveZoom, FontSize::fontSizeForKeyword(m_document, CSSValueXxSmall + scope.fontDescription().keywordSize() - 1, false)); |
| 148 | scope.fontDescription().setGenericFamily(initialDesc.genericFamily()); |
| 149 | if (!initialDesc.firstFamily().familyIsEmpty()) |
| 150 | scope.fontDescription().setFamily(initialDesc.firstFamily()); |
| 151 | } |
| 152 | |
| 153 | void FontBuilder::setFontFamilyInherit(const FontDescription& parentFontDescription) |
| 154 | { |
| 155 | FontDescriptionChangeScope scope(this); |
| 156 | |
| 157 | scope.fontDescription().setGenericFamily(parentFontDescription.genericFamily()); |
| 158 | scope.fontDescription().setFamily(parentFontDescription.family()); |
| 159 | scope.fontDescription().setIsSpecifiedFont(parentFontDescription.isSpecifiedFont()); |
| 160 | } |
| 161 | |
| 162 | // FIXME: I am not convinced FontBuilder needs to know anything about CSSValues. |
| 163 | void FontBuilder::setFontFamilyValue(CSSValue* value, float effectiveZoom) |
| 164 | { |
| 165 | FontDescriptionChangeScope scope(this); |
| 166 | |
| 167 | if (!value->isValueList()) |
| 168 | return; |
| 169 | |
| 170 | FontFamily& firstFamily = scope.fontDescription().firstFamily(); |
| 171 | FontFamily* currFamily = 0; |
| 172 | |
| 173 | // Before mapping in a new font-family property, we should reset the generic family. |
| 174 | bool oldFamilyUsedFixedDefaultSize = scope.fontDescription().useFixedDefaultSize(); |
| 175 | scope.fontDescription().setGenericFamily(FontDescription::NoFamily); |
| 176 | |
| 177 | for (CSSValueListIterator i = value; i.hasMore(); i.advance()) { |
| 178 | CSSValue* item = i.value(); |
| 179 | if (!item->isPrimitiveValue()) |
| 180 | continue; |
| 181 | CSSPrimitiveValue* contentValue = toCSSPrimitiveValue(item); |
| 182 | AtomicString face; |
| 183 | Settings* settings = m_document->settings(); |
| 184 | if (contentValue->isString()) { |
| 185 | face = contentValue->getStringValue(); |
| 186 | } else if (settings) { |
| 187 | switch (contentValue->getValueID()) { |
| 188 | case CSSValueWebkitBody: |
| 189 | face = settings->standardFontFamily(); |
| 190 | break; |
| 191 | case CSSValueSerif: |
| 192 | face = serifFamily; |
| 193 | scope.fontDescription().setGenericFamily(FontDescription::SerifFamily); |
| 194 | break; |
| 195 | case CSSValueSansSerif: |
| 196 | face = sansSerifFamily; |
| 197 | scope.fontDescription().setGenericFamily(FontDescription::SansSerifFamily); |
| 198 | break; |
| 199 | case CSSValueCursive: |
| 200 | face = cursiveFamily; |
| 201 | scope.fontDescription().setGenericFamily(FontDescription::CursiveFamily); |
| 202 | break; |
| 203 | case CSSValueFantasy: |
| 204 | face = fantasyFamily; |
| 205 | scope.fontDescription().setGenericFamily(FontDescription::FantasyFamily); |
| 206 | break; |
| 207 | case CSSValueMonospace: |
| 208 | face = monospaceFamily; |
| 209 | scope.fontDescription().setGenericFamily(FontDescription::MonospaceFamily); |
| 210 | break; |
| 211 | case CSSValueWebkitPictograph: |
| 212 | face = pictographFamily; |
| 213 | scope.fontDescription().setGenericFamily(FontDescription::PictographFamily); |
| 214 | break; |
| 215 | default: |
| 216 | break; |
| 217 | } |
| 218 | } |
| 219 | |
| 220 | if (!face.isEmpty()) { |
| 221 | if (!currFamily) { |
| 222 | // Filling in the first family. |
| 223 | firstFamily.setFamily(face); |
| 224 | firstFamily.appendFamily(0); // Remove any inherited family-fallback list. |
| 225 | currFamily = &firstFamily; |
| 226 | scope.fontDescription().setIsSpecifiedFont(scope.fontDescription().genericFamily() == FontDescription::NoFamily); |
| 227 | } else { |
| 228 | RefPtr<SharedFontFamily> newFamily = SharedFontFamily::create(); |
| 229 | newFamily->setFamily(face); |
| 230 | currFamily->appendFamily(newFamily); |
| 231 | currFamily = newFamily.get(); |
| 232 | } |
| 233 | } |
| 234 | } |
| 235 | |
| 236 | // We can't call useFixedDefaultSize() until all new font families have been added |
| 237 | // If currFamily is non-zero then we set at least one family on this description. |
| 238 | if (!currFamily) |
| 239 | return; |
| 240 | |
| 241 | if (scope.fontDescription().keywordSize() && scope.fontDescription().useFixedDefaultSize() != oldFamilyUsedFixedDefaultSize) |
| 242 | setSize(scope.fontDescription(), effectiveZoom, FontSize::fontSizeForKeyword(m_document, CSSValueXxSmall + scope.fontDescription().keywordSize() - 1, !oldFamilyUsedFixedDefaultSize)); |
| 243 | } |
| 244 | |
| 245 | void FontBuilder::setFontSizeInitial(float effectiveZoom) |
| 246 | { |
| 247 | FontDescriptionChangeScope scope(this); |
| 248 | |
| 249 | float size = FontSize::fontSizeForKeyword(m_document, CSSValueMedium, scope.fontDescription().useFixedDefaultSize()); |
| 250 | |
| 251 | if (size < 0) |
| 252 | return; |
| 253 | |
| 254 | scope.fontDescription().setKeywordSize(CSSValueMedium - CSSValueXxSmall + 1); |
| 255 | setSize(scope.fontDescription(), effectiveZoom, size); |
| 256 | } |
| 257 | |
| 258 | void FontBuilder::setFontSizeInherit(const FontDescription& parentFontDescription, float effectiveZoom) |
| 259 | { |
| 260 | FontDescriptionChangeScope scope(this); |
| 261 | |
| 262 | float size = parentFontDescription.specifiedSize(); |
| 263 | |
| 264 | if (size < 0) |
| 265 | return; |
| 266 | |
| 267 | scope.fontDescription().setKeywordSize(parentFontDescription.keywordSize()); |
| 268 | setSize(scope.fontDescription(), effectiveZoom, size); |
| 269 | } |
| 270 | |
| 271 | // FIXME: Figure out where we fall in the size ranges (xx-small to xxx-large) |
| 272 | // and scale down/up to the next size level. |
| 273 | static float largerFontSize(float size) |
| 274 | { |
| 275 | return size * 1.2f; |
| 276 | } |
| 277 | |
| 278 | static float smallerFontSize(float size) |
| 279 | { |
| 280 | return size / 1.2f; |
| 281 | } |
| 282 | |
| 283 | // FIXME: Have to pass RenderStyles here for calc/computed values. This shouldn't be neecessary. |
| 284 | void FontBuilder::setFontSizeValue(CSSValue* value, RenderStyle* parentStyle, RenderStyle* rootElementStyle, float effectiveZoom) |
| 285 | { |
| 286 | if (!value->isPrimitiveValue()) |
| 287 | return; |
| 288 | |
| 289 | CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(value); |
| 290 | |
| 291 | FontDescriptionChangeScope scope(this); |
| 292 | |
| 293 | scope.fontDescription().setKeywordSize(0); |
| 294 | float parentSize = 0; |
| 295 | bool parentIsAbsoluteSize = false; |
| 296 | float size = 0; |
| 297 | |
| 298 | // FIXME: Find out when parentStyle could be 0? |
| 299 | if (parentStyle) { |
| 300 | parentSize = parentStyle->fontDescription().specifiedSize(); |
| 301 | parentIsAbsoluteSize = parentStyle->fontDescription().isAbsoluteSize(); |
| 302 | } |
| 303 | |
| 304 | if (CSSValueID valueID = primitiveValue->getValueID()) { |
| 305 | switch (valueID) { |
| 306 | case CSSValueXxSmall: |
| 307 | case CSSValueXSmall: |
| 308 | case CSSValueSmall: |
| 309 | case CSSValueMedium: |
| 310 | case CSSValueLarge: |
| 311 | case CSSValueXLarge: |
| 312 | case CSSValueXxLarge: |
| 313 | case CSSValueWebkitXxxLarge: |
| 314 | size = FontSize::fontSizeForKeyword(m_document, valueID, scope.fontDescription().useFixedDefaultSize()); |
| 315 | scope.fontDescription().setKeywordSize(valueID - CSSValueXxSmall + 1); |
| 316 | break; |
| 317 | case CSSValueLarger: |
| 318 | size = largerFontSize(parentSize); |
| 319 | break; |
| 320 | case CSSValueSmaller: |
| 321 | size = smallerFontSize(parentSize); |
| 322 | break; |
| 323 | default: |
| 324 | return; |
| 325 | } |
| 326 | |
| 327 | scope.fontDescription().setIsAbsoluteSize(parentIsAbsoluteSize && (valueID == CSSValueLarger || valueID == CSSValueSmaller)); |
| 328 | } else { |
| 329 | scope.fontDescription().setIsAbsoluteSize(parentIsAbsoluteSize || !(primitiveValue->isPercentage() || primitiveValue->isFontRelativeLength())); |
| 330 | if (primitiveValue->isLength()) |
| 331 | size = primitiveValue->computeLength<float>(parentStyle, rootElementStyle, 1.0, true); |
| 332 | else if (primitiveValue->isPercentage()) |
| 333 | size = (primitiveValue->getFloatValue() * parentSize) / 100.0f; |
| 334 | else if (primitiveValue->isCalculatedPercentageWithLength()) |
| 335 | size = primitiveValue->cssCalcValue()->toCalcValue(parentStyle, rootElementStyle)->evaluate(parentSize); |
| 336 | else if (primitiveValue->isViewportPercentageLength()) |
| 337 | size = valueForLength(primitiveValue->viewportPercentageLength(), 0, m_document->renderView()); |
| 338 | else |
| 339 | return; |
| 340 | } |
| 341 | |
| 342 | if (size < 0) |
| 343 | return; |
| 344 | |
| 345 | // Overly large font sizes will cause crashes on some platforms (such as Windows). |
| 346 | // Cap font size here to make sure that doesn't happen. |
| 347 | size = std::min(maximumAllowedFontSize, size); |
| 348 | |
| 349 | setSize(scope.fontDescription(), effectiveZoom, size); |
| 350 | } |
| 351 | |
| 352 | void FontBuilder::setWeight(FontWeight fontWeight) |
| 353 | { |
| 354 | FontDescriptionChangeScope scope(this); |
| 355 | |
| 356 | scope.fontDescription().setWeight(fontWeight); |
| 357 | } |
| 358 | |
| 359 | void FontBuilder::setWeightBolder() |
| 360 | { |
| 361 | FontDescriptionChangeScope scope(this); |
| 362 | |
| 363 | scope.fontDescription().setWeight(scope.fontDescription().bolderWeight()); |
| 364 | } |
| 365 | |
| 366 | void FontBuilder::setWeightLighter() |
| 367 | { |
| 368 | FontDescriptionChangeScope scope(this); |
| 369 | |
| 370 | scope.fontDescription().setWeight(scope.fontDescription().lighterWeight()); |
| 371 | } |
| 372 | |
| 373 | void FontBuilder::setFontVariantLigaturesInitial() |
| 374 | { |
| 375 | FontDescriptionChangeScope scope(this); |
| 376 | |
| 377 | scope.fontDescription().setCommonLigaturesState(FontDescription::NormalLigaturesState); |
| 378 | scope.fontDescription().setDiscretionaryLigaturesState(FontDescription::NormalLigaturesState); |
| 379 | scope.fontDescription().setHistoricalLigaturesState(FontDescription::NormalLigaturesState); |
| 380 | } |
| 381 | |
| 382 | void FontBuilder::setFontVariantLigaturesInherit(const FontDescription& parentFontDescription) |
| 383 | { |
| 384 | FontDescriptionChangeScope scope(this); |
| 385 | |
| 386 | scope.fontDescription().setCommonLigaturesState(parentFontDescription.commonLigaturesState()); |
| 387 | scope.fontDescription().setDiscretionaryLigaturesState(parentFontDescription.discretionaryLigaturesState()); |
| 388 | scope.fontDescription().setHistoricalLigaturesState(parentFontDescription.historicalLigaturesState()); |
| 389 | } |
| 390 | |
| 391 | void FontBuilder::setFontVariantLigaturesValue(CSSValue* value) |
| 392 | { |
| 393 | FontDescriptionChangeScope scope(this); |
| 394 | |
| 395 | FontDescription::LigaturesState commonLigaturesState = FontDescription::NormalLigaturesState; |
| 396 | FontDescription::LigaturesState discretionaryLigaturesState = FontDescription::NormalLigaturesState; |
| 397 | FontDescription::LigaturesState historicalLigaturesState = FontDescription::NormalLigaturesState; |
| 398 | |
| 399 | if (value->isValueList()) { |
| 400 | CSSValueList* valueList = toCSSValueList(value); |
| 401 | for (size_t i = 0; i < valueList->length(); ++i) { |
| 402 | CSSValue* item = valueList->itemWithoutBoundsCheck(i); |
| 403 | ASSERT(item->isPrimitiveValue()); |
| 404 | if (item->isPrimitiveValue()) { |
| 405 | CSSPrimitiveValue* primitiveValue = toCSSPrimitiveValue(item); |
| 406 | switch (primitiveValue->getValueID()) { |
| 407 | case CSSValueNoCommonLigatures: |
| 408 | commonLigaturesState = FontDescription::DisabledLigaturesState; |
| 409 | break; |
| 410 | case CSSValueCommonLigatures: |
| 411 | commonLigaturesState = FontDescription::EnabledLigaturesState; |
| 412 | break; |
| 413 | case CSSValueNoDiscretionaryLigatures: |
| 414 | discretionaryLigaturesState = FontDescription::DisabledLigaturesState; |
| 415 | break; |
| 416 | case CSSValueDiscretionaryLigatures: |
| 417 | discretionaryLigaturesState = FontDescription::EnabledLigaturesState; |
| 418 | break; |
| 419 | case CSSValueNoHistoricalLigatures: |
| 420 | historicalLigaturesState = FontDescription::DisabledLigaturesState; |
| 421 | break; |
| 422 | case CSSValueHistoricalLigatures: |
| 423 | historicalLigaturesState = FontDescription::EnabledLigaturesState; |
| 424 | break; |
| 425 | default: |
| 426 | ASSERT_NOT_REACHED(); |
| 427 | break; |
| 428 | } |
| 429 | } |
| 430 | } |
| 431 | } |
| 432 | #if !ASSERT_DISABLED |
| 433 | else { |
| 434 | ASSERT_WITH_SECURITY_IMPLICATION(value->isPrimitiveValue()); |
| 435 | ASSERT(toCSSPrimitiveValue(value)->getValueID() == CSSValueNormal); |
| 436 | } |
| 437 | #endif |
| 438 | |
| 439 | scope.fontDescription().setCommonLigaturesState(commonLigaturesState); |
| 440 | scope.fontDescription().setDiscretionaryLigaturesState(discretionaryLigaturesState); |
| 441 | scope.fontDescription().setHistoricalLigaturesState(historicalLigaturesState); |
| 442 | } |
| 443 | |
| 444 | void FontBuilder::setScript(const String& locale) |
| 445 | { |
| 446 | FontDescriptionChangeScope scope(this); |
| 447 | |
| 448 | scope.fontDescription().setScript(localeToScriptCodeForFontSelection(locale)); |
| 449 | } |
| 450 | |
| 451 | void FontBuilder::setItalic(FontItalic italic) |
| 452 | { |
| 453 | FontDescriptionChangeScope scope(this); |
| 454 | |
| 455 | scope.fontDescription().setItalic(italic); |
| 456 | } |
| 457 | |
| 458 | void FontBuilder::setSmallCaps(FontSmallCaps smallCaps) |
| 459 | { |
| 460 | FontDescriptionChangeScope scope(this); |
| 461 | |
| 462 | scope.fontDescription().setSmallCaps(smallCaps); |
| 463 | } |
| 464 | |
| 465 | void FontBuilder::setTextRenderingMode(TextRenderingMode textRenderingMode) |
| 466 | { |
| 467 | FontDescriptionChangeScope scope(this); |
| 468 | |
| 469 | scope.fontDescription().setTextRenderingMode(textRenderingMode); |
| 470 | } |
| 471 | |
| 472 | void FontBuilder::setKerning(FontDescription::Kerning kerning) |
| 473 | { |
| 474 | FontDescriptionChangeScope scope(this); |
| 475 | |
| 476 | scope.fontDescription().setKerning(kerning); |
| 477 | } |
| 478 | |
| 479 | void FontBuilder::setFontSmoothing(FontSmoothingMode foontSmoothingMode) |
| 480 | { |
| 481 | FontDescriptionChangeScope scope(this); |
| 482 | |
| 483 | scope.fontDescription().setFontSmoothing(foontSmoothingMode); |
| 484 | } |
| 485 | |
| 486 | void FontBuilder::setFeatureSettingsNormal() |
| 487 | { |
| 488 | FontDescriptionChangeScope scope(this); |
| 489 | |
| 490 | // FIXME: Eliminate FontDescription::makeNormalFeatureSettings. It's useless. |
| 491 | scope.set(scope.fontDescription().makeNormalFeatureSettings()); |
| 492 | } |
| 493 | |
| 494 | void FontBuilder::setFeatureSettingsValue(CSSValue* value) |
| 495 | { |
| 496 | FontDescriptionChangeScope scope(this); |
| 497 | |
| 498 | CSSValueList* list = toCSSValueList(value); |
| 499 | RefPtr<FontFeatureSettings> settings = FontFeatureSettings::create(); |
| 500 | int len = list->length(); |
| 501 | for (int i = 0; i < len; ++i) { |
| 502 | CSSValue* item = list->itemWithoutBoundsCheck(i); |
| 503 | if (!item->isFontFeatureValue()) |
| 504 | continue; |
| 505 | FontFeatureValue* feature = static_cast<FontFeatureValue*>(item); |
| 506 | settings->append(FontFeature(feature->tag(), feature->value())); |
| 507 | } |
| 508 | scope.fontDescription().setFeatureSettings(settings.release()); |
| 509 | } |
| 510 | |
| 511 | void FontBuilder::setSize(FontDescription& fontDescription, float effectiveZoom, float size) |
| 512 | { |
| 513 | fontDescription.setSpecifiedSize(size); |
| 514 | fontDescription.setComputedSize(getComputedSizeFromSpecifiedSize(fontDescription, effectiveZoom, size)); |
| 515 | } |
| 516 | |
| 517 | float FontBuilder::getComputedSizeFromSpecifiedSize(FontDescription& fontDescription, float effectiveZoom, float specifiedSize) |
| 518 | { |
| 519 | float zoomFactor = 1.0f; |
| 520 | if (!m_useSVGZoomRules) { |
| 521 | zoomFactor = effectiveZoom; |
| 522 | // FIXME: Why is this here!!!!?! |
| 523 | if (Frame* frame = m_document->frame()) |
| 524 | zoomFactor *= frame->textZoomFactor(); |
| 525 | } |
| 526 | |
| 527 | return FontSize::getComputedSizeFromSpecifiedSize(m_document, zoomFactor, fontDescription.isAbsoluteSize(), specifiedSize); |
| 528 | } |
| 529 | |
| 530 | static void getFontAndGlyphOrientation(const RenderStyle* style, FontOrientation& fontOrientation, NonCJKGlyphOrientation& glyphOrientation) |
| 531 | { |
| 532 | if (style->isHorizontalWritingMode()) { |
| 533 | fontOrientation = Horizontal; |
| 534 | glyphOrientation = NonCJKGlyphOrientationVerticalRight; |
| 535 | return; |
| 536 | } |
| 537 | |
| 538 | switch (style->textOrientation()) { |
| 539 | case TextOrientationVerticalRight: |
| 540 | fontOrientation = Vertical; |
| 541 | glyphOrientation = NonCJKGlyphOrientationVerticalRight; |
| 542 | return; |
| 543 | case TextOrientationUpright: |
| 544 | fontOrientation = Vertical; |
| 545 | glyphOrientation = NonCJKGlyphOrientationUpright; |
| 546 | return; |
| 547 | case TextOrientationSideways: |
| 548 | if (style->writingMode() == LeftToRightWritingMode) { |
| 549 | // FIXME: This should map to sideways-left, which is not supported yet. |
| 550 | fontOrientation = Vertical; |
| 551 | glyphOrientation = NonCJKGlyphOrientationVerticalRight; |
| 552 | return; |
| 553 | } |
| 554 | fontOrientation = Horizontal; |
| 555 | glyphOrientation = NonCJKGlyphOrientationVerticalRight; |
| 556 | return; |
| 557 | case TextOrientationSidewaysRight: |
| 558 | fontOrientation = Horizontal; |
| 559 | glyphOrientation = NonCJKGlyphOrientationVerticalRight; |
| 560 | return; |
| 561 | default: |
| 562 | ASSERT_NOT_REACHED(); |
| 563 | fontOrientation = Horizontal; |
| 564 | glyphOrientation = NonCJKGlyphOrientationVerticalRight; |
| 565 | return; |
| 566 | } |
| 567 | } |
| 568 | |
| 569 | void FontBuilder::checkForOrientationChange(RenderStyle* style) |
| 570 | { |
| 571 | FontOrientation fontOrientation; |
| 572 | NonCJKGlyphOrientation glyphOrientation; |
| 573 | getFontAndGlyphOrientation(style, fontOrientation, glyphOrientation); |
| 574 | |
| 575 | FontDescriptionChangeScope scope(this); |
| 576 | |
| 577 | if (scope.fontDescription().orientation() == fontOrientation && scope.fontDescription().nonCJKGlyphOrientation() == glyphOrientation) |
| 578 | return; |
| 579 | |
| 580 | scope.fontDescription().setNonCJKGlyphOrientation(glyphOrientation); |
| 581 | scope.fontDescription().setOrientation(fontOrientation); |
| 582 | } |
| 583 | |
| 584 | void FontBuilder::checkForGenericFamilyChange(RenderStyle* style, const RenderStyle* parentStyle) |
| 585 | { |
| 586 | FontDescriptionChangeScope scope(this); |
| 587 | |
| 588 | if (scope.fontDescription().isAbsoluteSize() || !parentStyle) |
| 589 | return; |
| 590 | |
| 591 | const FontDescription& parentFontDescription = parentStyle->fontDescription(); |
| 592 | if (scope.fontDescription().useFixedDefaultSize() == parentFontDescription.useFixedDefaultSize()) |
| 593 | return; |
| 594 | |
| 595 | // For now, lump all families but monospace together. |
| 596 | if (scope.fontDescription().genericFamily() != FontDescription::MonospaceFamily |
| 597 | && parentFontDescription.genericFamily() != FontDescription::MonospaceFamily) |
| 598 | return; |
| 599 | |
| 600 | // We know the parent is monospace or the child is monospace, and that font |
| 601 | // size was unspecified. We want to scale our font size as appropriate. |
| 602 | // If the font uses a keyword size, then we refetch from the table rather than |
| 603 | // multiplying by our scale factor. |
| 604 | float size; |
| 605 | if (scope.fontDescription().keywordSize()) { |
| 606 | size = FontSize::fontSizeForKeyword(m_document, CSSValueXxSmall + scope.fontDescription().keywordSize() - 1, scope.fontDescription().useFixedDefaultSize()); |
| 607 | } else { |
| 608 | Settings* settings = m_document->settings(); |
| 609 | float fixedScaleFactor = (settings && settings->defaultFixedFontSize() && settings->defaultFontSize()) |
| 610 | ? static_cast<float>(settings->defaultFixedFontSize()) / settings->defaultFontSize() |
| 611 | : 1; |
| 612 | size = parentFontDescription.useFixedDefaultSize() ? |
| 613 | scope.fontDescription().specifiedSize() / fixedScaleFactor : |
| 614 | scope.fontDescription().specifiedSize() * fixedScaleFactor; |
| 615 | } |
| 616 | |
| 617 | setSize(scope.fontDescription(), style->effectiveZoom(), size); |
| 618 | } |
| 619 | |
| 620 | void FontBuilder::checkForZoomChange(RenderStyle* style, const RenderStyle* parentStyle) |
| 621 | { |
| 622 | FontDescriptionChangeScope scope(this); |
| 623 | |
| 624 | if (style->effectiveZoom() == parentStyle->effectiveZoom()) |
| 625 | return; |
| 626 | |
| 627 | setSize(scope.fontDescription(), style->effectiveZoom(), scope.fontDescription().specifiedSize()); |
| 628 | } |
| 629 | |
| 630 | // FIXME: style param should come first |
| 631 | void FontBuilder::createFont(PassRefPtr<FontSelector> fontSelector, const RenderStyle* parentStyle, RenderStyle* style) |
| 632 | { |
| 633 | if (!m_fontDirty) |
| 634 | return; |
| 635 | |
| 636 | checkForGenericFamilyChange(style, parentStyle); |
| 637 | checkForZoomChange(style, parentStyle); |
| 638 | checkForOrientationChange(style); |
| 639 | style->font().update(fontSelector); |
| 640 | m_fontDirty = false; |
| 641 | } |
| 642 | |
| 643 | void FontBuilder::createFontForDocument(PassRefPtr<FontSelector> fontSelector, RenderStyle* documentStyle) |
| 644 | { |
| 645 | FontDescription fontDescription = FontDescription(); |
| 646 | fontDescription.setScript(localeToScriptCodeForFontSelection(documentStyle->locale())); |
| 647 | if (Settings* settings = m_document->settings()) { |
| 648 | fontDescription.setUsePrinterFont(m_document->printing()); |
| 649 | const AtomicString& standardFont = settings->standardFontFamily(fontDescription.script()); |
| 650 | if (!standardFont.isEmpty()) { |
| 651 | fontDescription.setGenericFamily(FontDescription::StandardFamily); |
| 652 | fontDescription.firstFamily().setFamily(standardFont); |
| 653 | fontDescription.firstFamily().appendFamily(0); |
| 654 | } |
| 655 | fontDescription.setKeywordSize(CSSValueMedium - CSSValueXxSmall + 1); |
| 656 | int size = FontSize::fontSizeForKeyword(m_document, CSSValueMedium, false); |
| 657 | fontDescription.setSpecifiedSize(size); |
| 658 | fontDescription.setComputedSize(getComputedSizeFromSpecifiedSize(fontDescription, documentStyle->effectiveZoom(), size)); |
| 659 | } else { |
| 660 | fontDescription.setUsePrinterFont(m_document->printing()); |
| 661 | } |
| 662 | |
| 663 | FontOrientation fontOrientation; |
| 664 | NonCJKGlyphOrientation glyphOrientation; |
| 665 | getFontAndGlyphOrientation(documentStyle, fontOrientation, glyphOrientation); |
| 666 | fontDescription.setOrientation(fontOrientation); |
| 667 | fontDescription.setNonCJKGlyphOrientation(glyphOrientation); |
| 668 | documentStyle->setFontDescription(fontDescription); |
| 669 | documentStyle->font().update(fontSelector); |
| 670 | } |
| 671 | |
| 672 | } |