237 lines
10 KiB
C++
237 lines
10 KiB
C++
/*
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* Copyright (C) 1999 Lars Knoll (knoll@kde.org)
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* (C) 2004-2005 Allan Sandfeld Jensen (kde@carewolf.com)
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* Copyright (C) 2006, 2007 Nicholas Shanks (webkit@nickshanks.com)
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* Copyright (C) 2005-2017 Apple Inc. All rights reserved.
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* Copyright (C) 2007 Alexey Proskuryakov <ap@webkit.org>
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* Copyright (C) 2007, 2008 Eric Seidel <eric@webkit.org>
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* Copyright (C) 2008, 2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
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* Copyright (c) 2011, Code Aurora Forum. All rights reserved.
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* Copyright (C) Research In Motion Limited 2011. All rights reserved.
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* Copyright (C) 2012 Google Inc. All rights reserved.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public License
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* along with this library; see the file COPYING.LIB. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#include "config.h"
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#include "UserAgentStyle.h"
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#include "Chrome.h"
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#include "ChromeClient.h"
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#include "FullscreenManager.h"
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#include "HTMLAnchorElement.h"
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#include "HTMLBRElement.h"
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#include "HTMLBodyElement.h"
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#include "HTMLDataListElement.h"
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#include "HTMLDialogElement.h"
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#include "HTMLDivElement.h"
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#include "HTMLEmbedElement.h"
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#include "HTMLHeadElement.h"
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#include "HTMLHtmlElement.h"
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#include "HTMLInputElement.h"
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#include "HTMLMediaElement.h"
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#include "HTMLObjectElement.h"
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#include "HTMLSpanElement.h"
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#include "MathMLElement.h"
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#include "MediaQueryEvaluator.h"
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#include "Page.h"
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#include "Quirks.h"
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#include "RenderTheme.h"
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#include "RuleSet.h"
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#include "RuntimeEnabledFeatures.h"
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#include "SVGElement.h"
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#include "StyleSheetContents.h"
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#include "UserAgentStyleSheets.h"
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#include <wtf/NeverDestroyed.h>
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namespace WebCore {
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namespace Style {
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using namespace HTMLNames;
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RuleSet* UserAgentStyle::defaultStyle;
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RuleSet* UserAgentStyle::defaultQuirksStyle;
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RuleSet* UserAgentStyle::defaultPrintStyle;
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unsigned UserAgentStyle::defaultStyleVersion;
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StyleSheetContents* UserAgentStyle::defaultStyleSheet;
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StyleSheetContents* UserAgentStyle::quirksStyleSheet;
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StyleSheetContents* UserAgentStyle::dialogStyleSheet;
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StyleSheetContents* UserAgentStyle::svgStyleSheet;
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StyleSheetContents* UserAgentStyle::mathMLStyleSheet;
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StyleSheetContents* UserAgentStyle::mediaControlsStyleSheet;
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StyleSheetContents* UserAgentStyle::fullscreenStyleSheet;
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StyleSheetContents* UserAgentStyle::plugInsStyleSheet;
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StyleSheetContents* UserAgentStyle::mediaQueryStyleSheet;
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#if ENABLE(DATALIST_ELEMENT)
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StyleSheetContents* UserAgentStyle::dataListStyleSheet;
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#endif
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#if ENABLE(INPUT_TYPE_COLOR)
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StyleSheetContents* UserAgentStyle::colorInputStyleSheet;
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#endif
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#if ENABLE(IOS_FORM_CONTROL_REFRESH)
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StyleSheetContents* UserAgentStyle::legacyFormControlsIOSStyleSheet;
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#endif
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static const MediaQueryEvaluator& screenEval()
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{
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static NeverDestroyed<const MediaQueryEvaluator> staticScreenEval(String(MAKE_STATIC_STRING_IMPL("screen")));
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return staticScreenEval;
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}
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static const MediaQueryEvaluator& printEval()
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{
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static NeverDestroyed<const MediaQueryEvaluator> staticPrintEval(String(MAKE_STATIC_STRING_IMPL("print")));
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return staticPrintEval;
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}
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static StyleSheetContents* parseUASheet(const String& str)
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{
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StyleSheetContents& sheet = StyleSheetContents::create(CSSParserContext(UASheetMode)).leakRef(); // leak the sheet on purpose
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sheet.parseString(str);
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return &sheet;
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}
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void UserAgentStyle::addToDefaultStyle(StyleSheetContents& sheet)
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{
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defaultStyle->addRulesFromSheet(sheet, screenEval());
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defaultPrintStyle->addRulesFromSheet(sheet, printEval());
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// Build a stylesheet consisting of non-trivial media queries seen in default style.
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// Rulesets for these can't be global and need to be built in document context.
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for (auto& rule : sheet.childRules()) {
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if (!is<StyleRuleMedia>(*rule))
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continue;
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auto& mediaRule = downcast<StyleRuleMedia>(*rule);
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auto& mediaQuery = mediaRule.mediaQueries();
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if (screenEval().evaluate(mediaQuery, nullptr))
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continue;
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if (printEval().evaluate(mediaQuery, nullptr))
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continue;
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mediaQueryStyleSheet->parserAppendRule(mediaRule.copy());
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}
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++defaultStyleVersion;
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}
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void UserAgentStyle::initDefaultStyleSheet()
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{
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if (defaultStyle)
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return;
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defaultStyle = &RuleSet::create().leakRef();
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defaultPrintStyle = &RuleSet::create().leakRef();
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defaultQuirksStyle = &RuleSet::create().leakRef();
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mediaQueryStyleSheet = &StyleSheetContents::create(CSSParserContext(UASheetMode)).leakRef();
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// Strict-mode rules.
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String defaultRules = String(StringImpl::createWithoutCopying(htmlUserAgentStyleSheet, sizeof(htmlUserAgentStyleSheet))) + RenderTheme::singleton().extraDefaultStyleSheet();
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defaultStyleSheet = parseUASheet(defaultRules);
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addToDefaultStyle(*defaultStyleSheet);
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// Quirks-mode rules.
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String quirksRules = String(StringImpl::createWithoutCopying(quirksUserAgentStyleSheet, sizeof(quirksUserAgentStyleSheet))) + RenderTheme::singleton().extraQuirksStyleSheet();
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quirksStyleSheet = parseUASheet(quirksRules);
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defaultQuirksStyle->addRulesFromSheet(*quirksStyleSheet, screenEval());
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++defaultStyleVersion;
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}
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void UserAgentStyle::ensureDefaultStyleSheetsForElement(const Element& element)
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{
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if (is<HTMLElement>(element)) {
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if (is<HTMLObjectElement>(element) || is<HTMLEmbedElement>(element)) {
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if (!plugInsStyleSheet && element.document().page()) {
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String plugInsRules = RenderTheme::singleton().extraPlugInsStyleSheet() + element.document().page()->chrome().client().plugInExtraStyleSheet();
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if (plugInsRules.isEmpty())
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plugInsRules = String(StringImpl::createWithoutCopying(plugInsUserAgentStyleSheet, sizeof(plugInsUserAgentStyleSheet)));
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plugInsStyleSheet = parseUASheet(plugInsRules);
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addToDefaultStyle(*plugInsStyleSheet);
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}
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}
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else if (is<HTMLDialogElement>(element) && RuntimeEnabledFeatures::sharedFeatures().dialogElementEnabled()) {
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if (!dialogStyleSheet) {
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dialogStyleSheet = parseUASheet(StringImpl::createWithoutCopying(dialogUserAgentStyleSheet, sizeof(dialogUserAgentStyleSheet)));
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addToDefaultStyle(*dialogStyleSheet);
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}
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}
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#if ENABLE(VIDEO) && !ENABLE(MODERN_MEDIA_CONTROLS)
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else if (is<HTMLMediaElement>(element)) {
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if (!mediaControlsStyleSheet) {
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String mediaRules = RenderTheme::singleton().mediaControlsStyleSheet();
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if (mediaRules.isEmpty())
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mediaRules = String(StringImpl::createWithoutCopying(mediaControlsUserAgentStyleSheet, sizeof(mediaControlsUserAgentStyleSheet))) + RenderTheme::singleton().extraMediaControlsStyleSheet();
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mediaControlsStyleSheet = parseUASheet(mediaRules);
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addToDefaultStyle(*mediaControlsStyleSheet);
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}
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}
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#endif // ENABLE(VIDEO) && !ENABLE(MODERN_MEDIA_CONTROLS)
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#if ENABLE(DATALIST_ELEMENT)
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else if (!dataListStyleSheet && is<HTMLDataListElement>(element)) {
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dataListStyleSheet = parseUASheet(RenderTheme::singleton().dataListStyleSheet());
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addToDefaultStyle(*dataListStyleSheet);
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}
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#endif // ENABLE(DATALIST_ELEMENT)
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#if ENABLE(INPUT_TYPE_COLOR)
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else if (!colorInputStyleSheet && is<HTMLInputElement>(element) && downcast<HTMLInputElement>(element).isColorControl()) {
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colorInputStyleSheet = parseUASheet(RenderTheme::singleton().colorInputStyleSheet(element.document().settings()));
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addToDefaultStyle(*colorInputStyleSheet);
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}
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#endif // ENABLE(INPUT_TYPE_COLOR)
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} else if (is<SVGElement>(element)) {
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if (!svgStyleSheet) {
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// SVG rules.
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svgStyleSheet = parseUASheet(StringImpl::createWithoutCopying(svgUserAgentStyleSheet, sizeof(svgUserAgentStyleSheet)));
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addToDefaultStyle(*svgStyleSheet);
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}
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}
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#if ENABLE(MATHML)
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else if (is<MathMLElement>(element)) {
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if (!mathMLStyleSheet) {
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// MathML rules.
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mathMLStyleSheet = parseUASheet(StringImpl::createWithoutCopying(mathmlUserAgentStyleSheet, sizeof(mathmlUserAgentStyleSheet)));
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addToDefaultStyle(*mathMLStyleSheet);
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}
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}
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#endif // ENABLE(MATHML)
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#if ENABLE(FULLSCREEN_API)
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if (!fullscreenStyleSheet && element.document().fullscreenManager().isFullscreen()) {
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StringBuilder fullscreenRules;
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fullscreenRules.appendCharacters(fullscreenUserAgentStyleSheet, sizeof(fullscreenUserAgentStyleSheet));
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fullscreenRules.append(RenderTheme::singleton().extraFullScreenStyleSheet());
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if (element.document().quirks().needsBlackFullscreenBackgroundQuirk())
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fullscreenRules.append(":-webkit-full-screen { background-color: black; }"_s);
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fullscreenStyleSheet = parseUASheet(fullscreenRules.toString());
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addToDefaultStyle(*fullscreenStyleSheet);
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}
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#endif // ENABLE(FULLSCREEN_API)
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#if ENABLE(IOS_FORM_CONTROL_REFRESH)
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if (!legacyFormControlsIOSStyleSheet && !element.document().settings().iOSFormControlRefreshEnabled()) {
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legacyFormControlsIOSStyleSheet = parseUASheet(StringImpl::createWithoutCopying(legacyFormControlsIOSUserAgentStyleSheet, sizeof(legacyFormControlsIOSUserAgentStyleSheet)));
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addToDefaultStyle(*legacyFormControlsIOSStyleSheet);
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}
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#endif
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ASSERT(defaultStyle->features().idsInRules.isEmpty());
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ASSERT(mathMLStyleSheet || defaultStyle->features().siblingRules.isEmpty());
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}
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} // namespace Style
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} // namespace WebCore
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