зеркало из https://github.com/mozilla/gecko-dev.git
1088 строки
42 KiB
C++
1088 строки
42 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* representation of a declaration block (or style attribute) in a CSS
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* stylesheet
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*/
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/Util.h"
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#include "mozilla/css/Declaration.h"
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#include "nsPrintfCString.h"
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#include "gfxFontConstants.h"
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namespace mozilla {
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namespace css {
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// check that we can fit all the CSS properties into a uint16_t
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// for the mOrder array
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static_assert(eCSSProperty_COUNT_no_shorthands - 1 <= UINT16_MAX,
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"CSS longhand property numbers no longer fit in a uint16_t");
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Declaration::Declaration()
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: mImmutable(false)
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{
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MOZ_COUNT_CTOR(mozilla::css::Declaration);
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}
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Declaration::Declaration(const Declaration& aCopy)
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: mOrder(aCopy.mOrder),
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mData(aCopy.mData ? aCopy.mData->Clone() : nullptr),
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mImportantData(aCopy.mImportantData
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? aCopy.mImportantData->Clone() : nullptr),
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mImmutable(false)
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{
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MOZ_COUNT_CTOR(mozilla::css::Declaration);
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}
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Declaration::~Declaration()
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{
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MOZ_COUNT_DTOR(mozilla::css::Declaration);
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}
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void
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Declaration::ValueAppended(nsCSSProperty aProperty)
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{
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NS_ABORT_IF_FALSE(!mData && !mImportantData,
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"should only be called while expanded");
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NS_ABORT_IF_FALSE(!nsCSSProps::IsShorthand(aProperty),
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"shorthands forbidden");
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// order IS important for CSS, so remove and add to the end
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mOrder.RemoveElement(aProperty);
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mOrder.AppendElement(aProperty);
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}
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void
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Declaration::RemoveProperty(nsCSSProperty aProperty)
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{
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nsCSSExpandedDataBlock data;
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ExpandTo(&data);
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NS_ABORT_IF_FALSE(!mData && !mImportantData, "Expand didn't null things out");
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if (nsCSSProps::IsShorthand(aProperty)) {
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CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aProperty) {
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data.ClearLonghandProperty(*p);
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mOrder.RemoveElement(*p);
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}
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} else {
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data.ClearLonghandProperty(aProperty);
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mOrder.RemoveElement(aProperty);
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}
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CompressFrom(&data);
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}
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bool
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Declaration::HasProperty(nsCSSProperty aProperty) const
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{
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NS_ABORT_IF_FALSE(0 <= aProperty &&
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aProperty < eCSSProperty_COUNT_no_shorthands,
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"property ID out of range");
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nsCSSCompressedDataBlock *data = GetValueIsImportant(aProperty)
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? mImportantData : mData;
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const nsCSSValue *val = data->ValueFor(aProperty);
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return !!val;
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}
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bool
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Declaration::AppendValueToString(nsCSSProperty aProperty,
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nsAString& aResult) const
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{
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NS_ABORT_IF_FALSE(0 <= aProperty &&
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aProperty < eCSSProperty_COUNT_no_shorthands,
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"property ID out of range");
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nsCSSCompressedDataBlock *data = GetValueIsImportant(aProperty)
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? mImportantData : mData;
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const nsCSSValue *val = data->ValueFor(aProperty);
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if (!val) {
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return false;
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}
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val->AppendToString(aProperty, aResult);
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return true;
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}
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// Helper to append |aString| with the shorthand sides notation used in e.g.
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// 'padding'. |aProperties| and |aValues| are expected to have 4 elements.
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static void
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AppendSidesShorthandToString(const nsCSSProperty aProperties[],
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const nsCSSValue* aValues[],
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nsAString& aString)
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{
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const nsCSSValue& value1 = *aValues[0];
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const nsCSSValue& value2 = *aValues[1];
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const nsCSSValue& value3 = *aValues[2];
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const nsCSSValue& value4 = *aValues[3];
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NS_ABORT_IF_FALSE(value1.GetUnit() != eCSSUnit_Null, "null value 1");
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value1.AppendToString(aProperties[0], aString);
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if (value1 != value2 || value1 != value3 || value1 != value4) {
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aString.Append(PRUnichar(' '));
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NS_ABORT_IF_FALSE(value2.GetUnit() != eCSSUnit_Null, "null value 2");
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value2.AppendToString(aProperties[1], aString);
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if (value1 != value3 || value2 != value4) {
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aString.Append(PRUnichar(' '));
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NS_ABORT_IF_FALSE(value3.GetUnit() != eCSSUnit_Null, "null value 3");
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value3.AppendToString(aProperties[2], aString);
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if (value2 != value4) {
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aString.Append(PRUnichar(' '));
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NS_ABORT_IF_FALSE(value4.GetUnit() != eCSSUnit_Null, "null value 4");
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value4.AppendToString(aProperties[3], aString);
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}
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}
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}
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}
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void
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Declaration::GetValue(nsCSSProperty aProperty, nsAString& aValue) const
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{
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aValue.Truncate(0);
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// simple properties are easy.
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if (!nsCSSProps::IsShorthand(aProperty)) {
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AppendValueToString(aProperty, aValue);
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return;
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}
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// DOM Level 2 Style says (when describing CSS2Properties, although
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// not CSSStyleDeclaration.getPropertyValue):
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// However, if there is no shorthand declaration that could be added
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// to the ruleset without changing in any way the rules already
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// declared in the ruleset (i.e., by adding longhand rules that were
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// previously not declared in the ruleset), then the empty string
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// should be returned for the shorthand property.
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// This means we need to check a number of cases:
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// (1) Since a shorthand sets all sub-properties, if some of its
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// subproperties were not specified, we must return the empty
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// string.
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// (2) Since 'inherit', 'initial' and 'unset' can only be specified
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// as the values for entire properties, we need to return the
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// empty string if some but not all of the subproperties have one
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// of those values.
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// (3) Since a single value only makes sense with or without
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// !important, we return the empty string if some values are
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// !important and some are not.
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// Since we're doing this check for 'inherit' and 'initial' up front,
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// we can also simplify the property serialization code by serializing
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// those values up front as well.
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uint32_t totalCount = 0, importantCount = 0,
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initialCount = 0, inheritCount = 0, unsetCount = 0;
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CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aProperty) {
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if (*p == eCSSProperty__x_system_font ||
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nsCSSProps::PropHasFlags(*p, CSS_PROPERTY_DIRECTIONAL_SOURCE)) {
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// The system-font subproperty and the *-source properties don't count.
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continue;
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}
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++totalCount;
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const nsCSSValue *val = mData->ValueFor(*p);
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NS_ABORT_IF_FALSE(!val || !mImportantData || !mImportantData->ValueFor(*p),
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"can't be in both blocks");
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if (!val && mImportantData) {
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++importantCount;
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val = mImportantData->ValueFor(*p);
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}
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if (!val) {
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// Case (1) above: some subproperties not specified.
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return;
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}
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if (val->GetUnit() == eCSSUnit_Inherit) {
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++inheritCount;
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} else if (val->GetUnit() == eCSSUnit_Initial) {
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++initialCount;
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} else if (val->GetUnit() == eCSSUnit_Unset) {
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++unsetCount;
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}
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}
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if (importantCount != 0 && importantCount != totalCount) {
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// Case (3), no consistent importance.
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return;
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}
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if (initialCount == totalCount) {
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// Simplify serialization below by serializing initial up-front.
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nsCSSValue(eCSSUnit_Initial).AppendToString(eCSSProperty_UNKNOWN, aValue);
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return;
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}
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if (inheritCount == totalCount) {
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// Simplify serialization below by serializing inherit up-front.
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nsCSSValue(eCSSUnit_Inherit).AppendToString(eCSSProperty_UNKNOWN, aValue);
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return;
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}
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if (unsetCount == totalCount) {
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// Simplify serialization below by serializing unset up-front.
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nsCSSValue(eCSSUnit_Unset).AppendToString(eCSSProperty_UNKNOWN, aValue);
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return;
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}
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if (initialCount != 0 || inheritCount != 0 || unsetCount != 0) {
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// Case (2): partially initial, inherit or unset.
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return;
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}
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nsCSSCompressedDataBlock *data = importantCount ? mImportantData : mData;
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switch (aProperty) {
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case eCSSProperty_margin:
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case eCSSProperty_padding:
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case eCSSProperty_border_color:
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case eCSSProperty_border_style:
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case eCSSProperty_border_width: {
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const nsCSSProperty* subprops =
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nsCSSProps::SubpropertyEntryFor(aProperty);
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NS_ABORT_IF_FALSE(nsCSSProps::GetStringValue(subprops[0]).Find("-top") !=
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kNotFound, "first subprop must be top");
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NS_ABORT_IF_FALSE(nsCSSProps::GetStringValue(subprops[1]).Find("-right") !=
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kNotFound, "second subprop must be right");
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NS_ABORT_IF_FALSE(nsCSSProps::GetStringValue(subprops[2]).Find("-bottom") !=
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kNotFound, "third subprop must be bottom");
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NS_ABORT_IF_FALSE(nsCSSProps::GetStringValue(subprops[3]).Find("-left") !=
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kNotFound, "fourth subprop must be left");
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const nsCSSValue* vals[4] = {
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data->ValueFor(subprops[0]),
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data->ValueFor(subprops[1]),
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data->ValueFor(subprops[2]),
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data->ValueFor(subprops[3])
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};
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AppendSidesShorthandToString(subprops, vals, aValue);
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break;
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}
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case eCSSProperty_border_radius:
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case eCSSProperty__moz_outline_radius: {
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const nsCSSProperty* subprops =
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nsCSSProps::SubpropertyEntryFor(aProperty);
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const nsCSSValue* vals[4] = {
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data->ValueFor(subprops[0]),
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data->ValueFor(subprops[1]),
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data->ValueFor(subprops[2]),
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data->ValueFor(subprops[3])
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};
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// For compatibility, only write a slash and the y-values
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// if they're not identical to the x-values.
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bool needY = false;
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const nsCSSValue* xVals[4];
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const nsCSSValue* yVals[4];
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for (int i = 0; i < 4; i++) {
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if (vals[i]->GetUnit() == eCSSUnit_Pair) {
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needY = true;
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xVals[i] = &vals[i]->GetPairValue().mXValue;
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yVals[i] = &vals[i]->GetPairValue().mYValue;
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} else {
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xVals[i] = yVals[i] = vals[i];
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}
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}
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AppendSidesShorthandToString(subprops, xVals, aValue);
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if (needY) {
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aValue.AppendLiteral(" / ");
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AppendSidesShorthandToString(subprops, yVals, aValue);
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}
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break;
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}
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case eCSSProperty_border_image: {
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// Even though there are some cases where we could omit
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// 'border-image-source' (when it's none), it's probably not a
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// good idea since it's likely to be confusing. It would also
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// require adding the extra check that we serialize *something*.
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AppendValueToString(eCSSProperty_border_image_source, aValue);
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bool sliceDefault = data->HasDefaultBorderImageSlice();
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bool widthDefault = data->HasDefaultBorderImageWidth();
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bool outsetDefault = data->HasDefaultBorderImageOutset();
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if (!sliceDefault || !widthDefault || !outsetDefault) {
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aValue.Append(PRUnichar(' '));
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AppendValueToString(eCSSProperty_border_image_slice, aValue);
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if (!widthDefault || !outsetDefault) {
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aValue.Append(NS_LITERAL_STRING(" /"));
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if (!widthDefault) {
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aValue.Append(PRUnichar(' '));
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AppendValueToString(eCSSProperty_border_image_width, aValue);
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}
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if (!outsetDefault) {
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aValue.Append(NS_LITERAL_STRING(" / "));
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AppendValueToString(eCSSProperty_border_image_outset, aValue);
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}
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}
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}
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bool repeatDefault = data->HasDefaultBorderImageRepeat();
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if (!repeatDefault) {
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aValue.Append(PRUnichar(' '));
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AppendValueToString(eCSSProperty_border_image_repeat, aValue);
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}
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break;
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}
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case eCSSProperty_border: {
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// If we have a non-default value for any of the properties that
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// this shorthand sets but cannot specify, we have to return the
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// empty string.
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if (data->ValueFor(eCSSProperty_border_image_source)->GetUnit() !=
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eCSSUnit_None ||
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!data->HasDefaultBorderImageSlice() ||
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!data->HasDefaultBorderImageWidth() ||
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!data->HasDefaultBorderImageOutset() ||
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!data->HasDefaultBorderImageRepeat() ||
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data->ValueFor(eCSSProperty_border_top_colors)->GetUnit() !=
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eCSSUnit_None ||
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data->ValueFor(eCSSProperty_border_right_colors)->GetUnit() !=
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eCSSUnit_None ||
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data->ValueFor(eCSSProperty_border_bottom_colors)->GetUnit() !=
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eCSSUnit_None ||
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data->ValueFor(eCSSProperty_border_left_colors)->GetUnit() !=
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eCSSUnit_None) {
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break;
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}
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const nsCSSProperty* subproptables[3] = {
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nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_color),
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nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_style),
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nsCSSProps::SubpropertyEntryFor(eCSSProperty_border_width)
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};
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bool match = true;
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for (const nsCSSProperty** subprops = subproptables,
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**subprops_end = ArrayEnd(subproptables);
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subprops < subprops_end; ++subprops) {
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// Check only the first four subprops in each table, since the
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// others are extras for dimensional box properties.
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const nsCSSValue *firstSide = data->ValueFor((*subprops)[0]);
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for (int32_t side = 1; side < 4; ++side) {
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const nsCSSValue *otherSide =
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data->ValueFor((*subprops)[side]);
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if (*firstSide != *otherSide)
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match = false;
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}
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}
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if (!match) {
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// We can't express what we have in the border shorthand
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break;
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}
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// tweak aProperty and fall through
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aProperty = eCSSProperty_border_top;
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}
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case eCSSProperty_border_top:
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case eCSSProperty_border_right:
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case eCSSProperty_border_bottom:
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case eCSSProperty_border_left:
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case eCSSProperty_border_start:
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case eCSSProperty_border_end:
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case eCSSProperty__moz_column_rule:
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case eCSSProperty_outline: {
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const nsCSSProperty* subprops =
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nsCSSProps::SubpropertyEntryFor(aProperty);
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NS_ABORT_IF_FALSE(StringEndsWith(nsCSSProps::GetStringValue(subprops[2]),
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NS_LITERAL_CSTRING("-color")) ||
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StringEndsWith(nsCSSProps::GetStringValue(subprops[2]),
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NS_LITERAL_CSTRING("-color-value")),
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"third subprop must be the color property");
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const nsCSSValue *colorValue = data->ValueFor(subprops[2]);
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bool isMozUseTextColor =
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colorValue->GetUnit() == eCSSUnit_Enumerated &&
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colorValue->GetIntValue() == NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR;
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if (!AppendValueToString(subprops[0], aValue) ||
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!(aValue.Append(PRUnichar(' ')),
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AppendValueToString(subprops[1], aValue)) ||
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// Don't output a third value when it's -moz-use-text-color.
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!(isMozUseTextColor ||
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(aValue.Append(PRUnichar(' ')),
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AppendValueToString(subprops[2], aValue)))) {
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aValue.Truncate();
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}
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break;
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}
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case eCSSProperty_margin_left:
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case eCSSProperty_margin_right:
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case eCSSProperty_margin_start:
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case eCSSProperty_margin_end:
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case eCSSProperty_padding_left:
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case eCSSProperty_padding_right:
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case eCSSProperty_padding_start:
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case eCSSProperty_padding_end:
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case eCSSProperty_border_left_color:
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case eCSSProperty_border_left_style:
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case eCSSProperty_border_left_width:
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case eCSSProperty_border_right_color:
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case eCSSProperty_border_right_style:
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case eCSSProperty_border_right_width:
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case eCSSProperty_border_start_color:
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case eCSSProperty_border_start_style:
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case eCSSProperty_border_start_width:
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case eCSSProperty_border_end_color:
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case eCSSProperty_border_end_style:
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case eCSSProperty_border_end_width: {
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const nsCSSProperty* subprops =
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nsCSSProps::SubpropertyEntryFor(aProperty);
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NS_ABORT_IF_FALSE(subprops[3] == eCSSProperty_UNKNOWN,
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"not box property with physical vs. logical cascading");
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AppendValueToString(subprops[0], aValue);
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break;
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}
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case eCSSProperty_background: {
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// We know from above that all subproperties were specified.
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// However, we still can't represent that in the shorthand unless
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// they're all lists of the same length. So if they're different
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// lengths, we need to bail out.
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// We also need to bail out if an item has background-clip and
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// background-origin that are different and not the default
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// values. (We omit them if they're both default.)
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const nsCSSValueList *image =
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data->ValueFor(eCSSProperty_background_image)->
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GetListValue();
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const nsCSSValuePairList *repeat =
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data->ValueFor(eCSSProperty_background_repeat)->
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GetPairListValue();
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const nsCSSValueList *attachment =
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data->ValueFor(eCSSProperty_background_attachment)->
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GetListValue();
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const nsCSSValueList *position =
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data->ValueFor(eCSSProperty_background_position)->
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GetListValue();
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const nsCSSValueList *clip =
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data->ValueFor(eCSSProperty_background_clip)->
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GetListValue();
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const nsCSSValueList *origin =
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data->ValueFor(eCSSProperty_background_origin)->
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GetListValue();
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const nsCSSValuePairList *size =
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data->ValueFor(eCSSProperty_background_size)->
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GetPairListValue();
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for (;;) {
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image->mValue.AppendToString(eCSSProperty_background_image, aValue);
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aValue.Append(PRUnichar(' '));
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repeat->mXValue.AppendToString(eCSSProperty_background_repeat, aValue);
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if (repeat->mYValue.GetUnit() != eCSSUnit_Null) {
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repeat->mYValue.AppendToString(eCSSProperty_background_repeat, aValue);
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}
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aValue.Append(PRUnichar(' '));
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attachment->mValue.AppendToString(eCSSProperty_background_attachment,
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aValue);
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aValue.Append(PRUnichar(' '));
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position->mValue.AppendToString(eCSSProperty_background_position,
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aValue);
|
|
|
|
if (size->mXValue.GetUnit() != eCSSUnit_Auto ||
|
|
size->mYValue.GetUnit() != eCSSUnit_Auto) {
|
|
aValue.Append(PRUnichar(' '));
|
|
aValue.Append(PRUnichar('/'));
|
|
aValue.Append(PRUnichar(' '));
|
|
size->mXValue.AppendToString(eCSSProperty_background_size, aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
size->mYValue.AppendToString(eCSSProperty_background_size, aValue);
|
|
}
|
|
|
|
NS_ABORT_IF_FALSE(clip->mValue.GetUnit() == eCSSUnit_Enumerated &&
|
|
origin->mValue.GetUnit() == eCSSUnit_Enumerated,
|
|
"should not have inherit/initial within list");
|
|
|
|
if (clip->mValue.GetIntValue() != NS_STYLE_BG_CLIP_BORDER ||
|
|
origin->mValue.GetIntValue() != NS_STYLE_BG_ORIGIN_PADDING) {
|
|
MOZ_ASSERT(nsCSSProps::kKeywordTableTable[
|
|
eCSSProperty_background_origin] ==
|
|
nsCSSProps::kBackgroundOriginKTable);
|
|
MOZ_ASSERT(nsCSSProps::kKeywordTableTable[
|
|
eCSSProperty_background_clip] ==
|
|
nsCSSProps::kBackgroundOriginKTable);
|
|
static_assert(NS_STYLE_BG_CLIP_BORDER ==
|
|
NS_STYLE_BG_ORIGIN_BORDER &&
|
|
NS_STYLE_BG_CLIP_PADDING ==
|
|
NS_STYLE_BG_ORIGIN_PADDING &&
|
|
NS_STYLE_BG_CLIP_CONTENT ==
|
|
NS_STYLE_BG_ORIGIN_CONTENT,
|
|
"bg-clip and bg-origin style constants must agree");
|
|
aValue.Append(PRUnichar(' '));
|
|
origin->mValue.AppendToString(eCSSProperty_background_origin, aValue);
|
|
|
|
if (clip->mValue != origin->mValue) {
|
|
aValue.Append(PRUnichar(' '));
|
|
clip->mValue.AppendToString(eCSSProperty_background_clip, aValue);
|
|
}
|
|
}
|
|
|
|
image = image->mNext;
|
|
repeat = repeat->mNext;
|
|
attachment = attachment->mNext;
|
|
position = position->mNext;
|
|
clip = clip->mNext;
|
|
origin = origin->mNext;
|
|
size = size->mNext;
|
|
|
|
if (!image) {
|
|
if (repeat || attachment || position || clip || origin || size) {
|
|
// Uneven length lists, so can't be serialized as shorthand.
|
|
aValue.Truncate();
|
|
return;
|
|
}
|
|
break;
|
|
}
|
|
if (!repeat || !attachment || !position || !clip || !origin || !size) {
|
|
// Uneven length lists, so can't be serialized as shorthand.
|
|
aValue.Truncate();
|
|
return;
|
|
}
|
|
aValue.Append(PRUnichar(','));
|
|
aValue.Append(PRUnichar(' '));
|
|
}
|
|
|
|
aValue.Append(PRUnichar(' '));
|
|
AppendValueToString(eCSSProperty_background_color, aValue);
|
|
break;
|
|
}
|
|
case eCSSProperty_font: {
|
|
// systemFont might not be present; other values are guaranteed to be
|
|
// available based on the shorthand check at the beginning of the
|
|
// function, as long as the prop is enabled
|
|
const nsCSSValue *systemFont =
|
|
data->ValueFor(eCSSProperty__x_system_font);
|
|
const nsCSSValue *style =
|
|
data->ValueFor(eCSSProperty_font_style);
|
|
const nsCSSValue *variant =
|
|
data->ValueFor(eCSSProperty_font_variant);
|
|
const nsCSSValue *weight =
|
|
data->ValueFor(eCSSProperty_font_weight);
|
|
const nsCSSValue *size =
|
|
data->ValueFor(eCSSProperty_font_size);
|
|
const nsCSSValue *lh =
|
|
data->ValueFor(eCSSProperty_line_height);
|
|
const nsCSSValue *family =
|
|
data->ValueFor(eCSSProperty_font_family);
|
|
const nsCSSValue *stretch =
|
|
data->ValueFor(eCSSProperty_font_stretch);
|
|
const nsCSSValue *sizeAdjust =
|
|
data->ValueFor(eCSSProperty_font_size_adjust);
|
|
const nsCSSValue *featureSettings =
|
|
data->ValueFor(eCSSProperty_font_feature_settings);
|
|
const nsCSSValue *languageOverride =
|
|
data->ValueFor(eCSSProperty_font_language_override);
|
|
const nsCSSValue *fontKerning =
|
|
data->ValueFor(eCSSProperty_font_kerning);
|
|
const nsCSSValue *fontSynthesis =
|
|
data->ValueFor(eCSSProperty_font_synthesis);
|
|
const nsCSSValue *fontVariantAlternates =
|
|
data->ValueFor(eCSSProperty_font_variant_alternates);
|
|
const nsCSSValue *fontVariantCaps =
|
|
data->ValueFor(eCSSProperty_font_variant_caps);
|
|
const nsCSSValue *fontVariantEastAsian =
|
|
data->ValueFor(eCSSProperty_font_variant_east_asian);
|
|
const nsCSSValue *fontVariantLigatures =
|
|
data->ValueFor(eCSSProperty_font_variant_ligatures);
|
|
const nsCSSValue *fontVariantNumeric =
|
|
data->ValueFor(eCSSProperty_font_variant_numeric);
|
|
const nsCSSValue *fontVariantPosition =
|
|
data->ValueFor(eCSSProperty_font_variant_position);
|
|
|
|
// if font features are not enabled, pointers for fontVariant
|
|
// values above may be null since the shorthand check ignores them
|
|
// font-variant-alternates enabled ==> layout.css.font-features.enabled is true
|
|
bool fontFeaturesEnabled =
|
|
nsCSSProps::IsEnabled(eCSSProperty_font_variant_alternates);
|
|
|
|
if (systemFont &&
|
|
systemFont->GetUnit() != eCSSUnit_None &&
|
|
systemFont->GetUnit() != eCSSUnit_Null) {
|
|
if (style->GetUnit() != eCSSUnit_System_Font ||
|
|
variant->GetUnit() != eCSSUnit_System_Font ||
|
|
weight->GetUnit() != eCSSUnit_System_Font ||
|
|
size->GetUnit() != eCSSUnit_System_Font ||
|
|
lh->GetUnit() != eCSSUnit_System_Font ||
|
|
family->GetUnit() != eCSSUnit_System_Font ||
|
|
stretch->GetUnit() != eCSSUnit_System_Font ||
|
|
sizeAdjust->GetUnit() != eCSSUnit_System_Font ||
|
|
featureSettings->GetUnit() != eCSSUnit_System_Font ||
|
|
languageOverride->GetUnit() != eCSSUnit_System_Font ||
|
|
(fontFeaturesEnabled &&
|
|
(fontKerning->GetUnit() != eCSSUnit_System_Font ||
|
|
fontSynthesis->GetUnit() != eCSSUnit_System_Font ||
|
|
fontVariantAlternates->GetUnit() != eCSSUnit_System_Font ||
|
|
fontVariantCaps->GetUnit() != eCSSUnit_System_Font ||
|
|
fontVariantEastAsian->GetUnit() != eCSSUnit_System_Font ||
|
|
fontVariantLigatures->GetUnit() != eCSSUnit_System_Font ||
|
|
fontVariantNumeric->GetUnit() != eCSSUnit_System_Font ||
|
|
fontVariantPosition->GetUnit() != eCSSUnit_System_Font))) {
|
|
// This can't be represented as a shorthand.
|
|
return;
|
|
}
|
|
systemFont->AppendToString(eCSSProperty__x_system_font, aValue);
|
|
} else {
|
|
// properties reset by this shorthand property to their
|
|
// initial values but not represented in its syntax
|
|
if (stretch->GetUnit() != eCSSUnit_Enumerated ||
|
|
stretch->GetIntValue() != NS_STYLE_FONT_STRETCH_NORMAL ||
|
|
sizeAdjust->GetUnit() != eCSSUnit_None ||
|
|
featureSettings->GetUnit() != eCSSUnit_Normal ||
|
|
languageOverride->GetUnit() != eCSSUnit_Normal ||
|
|
(fontFeaturesEnabled &&
|
|
(fontKerning->GetIntValue() != NS_FONT_KERNING_AUTO ||
|
|
fontSynthesis->GetUnit() != eCSSUnit_Enumerated ||
|
|
fontSynthesis->GetIntValue() !=
|
|
(NS_FONT_SYNTHESIS_WEIGHT | NS_FONT_SYNTHESIS_STYLE) ||
|
|
fontVariantAlternates->GetUnit() != eCSSUnit_Normal ||
|
|
fontVariantCaps->GetUnit() != eCSSUnit_Normal ||
|
|
fontVariantEastAsian->GetUnit() != eCSSUnit_Normal ||
|
|
fontVariantLigatures->GetUnit() != eCSSUnit_Normal ||
|
|
fontVariantNumeric->GetUnit() != eCSSUnit_Normal ||
|
|
fontVariantPosition->GetUnit() != eCSSUnit_Normal))) {
|
|
return;
|
|
}
|
|
|
|
if (style->GetUnit() != eCSSUnit_Enumerated ||
|
|
style->GetIntValue() != NS_FONT_STYLE_NORMAL) {
|
|
style->AppendToString(eCSSProperty_font_style, aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
}
|
|
if (variant->GetUnit() != eCSSUnit_Enumerated ||
|
|
variant->GetIntValue() != NS_FONT_VARIANT_NORMAL) {
|
|
variant->AppendToString(eCSSProperty_font_variant, aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
}
|
|
if (weight->GetUnit() != eCSSUnit_Enumerated ||
|
|
weight->GetIntValue() != NS_FONT_WEIGHT_NORMAL) {
|
|
weight->AppendToString(eCSSProperty_font_weight, aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
}
|
|
size->AppendToString(eCSSProperty_font_size, aValue);
|
|
if (lh->GetUnit() != eCSSUnit_Normal) {
|
|
aValue.Append(PRUnichar('/'));
|
|
lh->AppendToString(eCSSProperty_line_height, aValue);
|
|
}
|
|
aValue.Append(PRUnichar(' '));
|
|
family->AppendToString(eCSSProperty_font_family, aValue);
|
|
}
|
|
break;
|
|
}
|
|
case eCSSProperty_list_style:
|
|
if (AppendValueToString(eCSSProperty_list_style_type, aValue))
|
|
aValue.Append(PRUnichar(' '));
|
|
if (AppendValueToString(eCSSProperty_list_style_position, aValue))
|
|
aValue.Append(PRUnichar(' '));
|
|
AppendValueToString(eCSSProperty_list_style_image, aValue);
|
|
break;
|
|
case eCSSProperty_overflow: {
|
|
const nsCSSValue &xValue =
|
|
*data->ValueFor(eCSSProperty_overflow_x);
|
|
const nsCSSValue &yValue =
|
|
*data->ValueFor(eCSSProperty_overflow_y);
|
|
if (xValue == yValue)
|
|
xValue.AppendToString(eCSSProperty_overflow_x, aValue);
|
|
break;
|
|
}
|
|
case eCSSProperty_text_decoration: {
|
|
// If text-decoration-color or text-decoration-style isn't initial value,
|
|
// we cannot serialize the text-decoration shorthand value.
|
|
const nsCSSValue *decorationColor =
|
|
data->ValueFor(eCSSProperty_text_decoration_color);
|
|
const nsCSSValue *decorationStyle =
|
|
data->ValueFor(eCSSProperty_text_decoration_style);
|
|
|
|
NS_ABORT_IF_FALSE(decorationStyle->GetUnit() == eCSSUnit_Enumerated,
|
|
nsPrintfCString("bad text-decoration-style unit %d",
|
|
decorationStyle->GetUnit()).get());
|
|
|
|
if (decorationColor->GetUnit() != eCSSUnit_Enumerated ||
|
|
decorationColor->GetIntValue() != NS_STYLE_COLOR_MOZ_USE_TEXT_COLOR ||
|
|
decorationStyle->GetIntValue() !=
|
|
NS_STYLE_TEXT_DECORATION_STYLE_SOLID) {
|
|
return;
|
|
}
|
|
|
|
AppendValueToString(eCSSProperty_text_decoration_line, aValue);
|
|
break;
|
|
}
|
|
case eCSSProperty_transition: {
|
|
const nsCSSValue *transProp =
|
|
data->ValueFor(eCSSProperty_transition_property);
|
|
const nsCSSValue *transDuration =
|
|
data->ValueFor(eCSSProperty_transition_duration);
|
|
const nsCSSValue *transTiming =
|
|
data->ValueFor(eCSSProperty_transition_timing_function);
|
|
const nsCSSValue *transDelay =
|
|
data->ValueFor(eCSSProperty_transition_delay);
|
|
|
|
NS_ABORT_IF_FALSE(transDuration->GetUnit() == eCSSUnit_List ||
|
|
transDuration->GetUnit() == eCSSUnit_ListDep,
|
|
nsPrintfCString("bad t-duration unit %d",
|
|
transDuration->GetUnit()).get());
|
|
NS_ABORT_IF_FALSE(transTiming->GetUnit() == eCSSUnit_List ||
|
|
transTiming->GetUnit() == eCSSUnit_ListDep,
|
|
nsPrintfCString("bad t-timing unit %d",
|
|
transTiming->GetUnit()).get());
|
|
NS_ABORT_IF_FALSE(transDelay->GetUnit() == eCSSUnit_List ||
|
|
transDelay->GetUnit() == eCSSUnit_ListDep,
|
|
nsPrintfCString("bad t-delay unit %d",
|
|
transDelay->GetUnit()).get());
|
|
|
|
const nsCSSValueList* dur = transDuration->GetListValue();
|
|
const nsCSSValueList* tim = transTiming->GetListValue();
|
|
const nsCSSValueList* del = transDelay->GetListValue();
|
|
|
|
if (transProp->GetUnit() == eCSSUnit_None ||
|
|
transProp->GetUnit() == eCSSUnit_All) {
|
|
// If any of the other three lists has more than one element,
|
|
// we can't use the shorthand.
|
|
if (!dur->mNext && !tim->mNext && !del->mNext) {
|
|
transProp->AppendToString(eCSSProperty_transition_property, aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
dur->mValue.AppendToString(eCSSProperty_transition_duration,aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
tim->mValue.AppendToString(eCSSProperty_transition_timing_function,
|
|
aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
del->mValue.AppendToString(eCSSProperty_transition_delay, aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
} else {
|
|
aValue.Truncate();
|
|
}
|
|
} else {
|
|
NS_ABORT_IF_FALSE(transProp->GetUnit() == eCSSUnit_List ||
|
|
transProp->GetUnit() == eCSSUnit_ListDep,
|
|
nsPrintfCString("bad t-prop unit %d",
|
|
transProp->GetUnit()).get());
|
|
const nsCSSValueList* pro = transProp->GetListValue();
|
|
for (;;) {
|
|
pro->mValue.AppendToString(eCSSProperty_transition_property,
|
|
aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
dur->mValue.AppendToString(eCSSProperty_transition_duration,
|
|
aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
tim->mValue.AppendToString(eCSSProperty_transition_timing_function,
|
|
aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
del->mValue.AppendToString(eCSSProperty_transition_delay,
|
|
aValue);
|
|
pro = pro->mNext;
|
|
dur = dur->mNext;
|
|
tim = tim->mNext;
|
|
del = del->mNext;
|
|
if (!pro || !dur || !tim || !del) {
|
|
break;
|
|
}
|
|
aValue.AppendLiteral(", ");
|
|
}
|
|
if (pro || dur || tim || del) {
|
|
// Lists not all the same length, can't use shorthand.
|
|
aValue.Truncate();
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case eCSSProperty_animation: {
|
|
const nsCSSProperty* subprops =
|
|
nsCSSProps::SubpropertyEntryFor(eCSSProperty_animation);
|
|
static const size_t numProps = 7;
|
|
NS_ABORT_IF_FALSE(subprops[numProps] == eCSSProperty_UNKNOWN,
|
|
"unexpected number of subproperties");
|
|
const nsCSSValue* values[numProps];
|
|
const nsCSSValueList* lists[numProps];
|
|
|
|
for (uint32_t i = 0; i < numProps; ++i) {
|
|
values[i] = data->ValueFor(subprops[i]);
|
|
NS_ABORT_IF_FALSE(values[i]->GetUnit() == eCSSUnit_List ||
|
|
values[i]->GetUnit() == eCSSUnit_ListDep,
|
|
nsPrintfCString("bad a-duration unit %d",
|
|
values[i]->GetUnit()).get());
|
|
lists[i] = values[i]->GetListValue();
|
|
}
|
|
|
|
for (;;) {
|
|
// We must serialize 'animation-name' last in case it has
|
|
// a value that conflicts with one of the other keyword properties.
|
|
NS_ABORT_IF_FALSE(subprops[numProps - 1] ==
|
|
eCSSProperty_animation_name,
|
|
"animation-name must be last");
|
|
bool done = false;
|
|
for (uint32_t i = 0;;) {
|
|
lists[i]->mValue.AppendToString(subprops[i], aValue);
|
|
lists[i] = lists[i]->mNext;
|
|
if (!lists[i]) {
|
|
done = true;
|
|
}
|
|
if (++i == numProps) {
|
|
break;
|
|
}
|
|
aValue.Append(PRUnichar(' '));
|
|
}
|
|
if (done) {
|
|
break;
|
|
}
|
|
aValue.AppendLiteral(", ");
|
|
}
|
|
for (uint32_t i = 0; i < numProps; ++i) {
|
|
if (lists[i]) {
|
|
// Lists not all the same length, can't use shorthand.
|
|
aValue.Truncate();
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
case eCSSProperty_marker: {
|
|
const nsCSSValue &endValue =
|
|
*data->ValueFor(eCSSProperty_marker_end);
|
|
const nsCSSValue &midValue =
|
|
*data->ValueFor(eCSSProperty_marker_mid);
|
|
const nsCSSValue &startValue =
|
|
*data->ValueFor(eCSSProperty_marker_start);
|
|
if (endValue == midValue && midValue == startValue)
|
|
AppendValueToString(eCSSProperty_marker_end, aValue);
|
|
break;
|
|
}
|
|
case eCSSProperty__moz_columns: {
|
|
// Two values, column-count and column-width, separated by a space.
|
|
const nsCSSProperty* subprops =
|
|
nsCSSProps::SubpropertyEntryFor(aProperty);
|
|
AppendValueToString(subprops[0], aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
AppendValueToString(subprops[1], aValue);
|
|
break;
|
|
}
|
|
case eCSSProperty_flex: {
|
|
// flex-grow, flex-shrink, flex-basis, separated by single space
|
|
const nsCSSProperty* subprops =
|
|
nsCSSProps::SubpropertyEntryFor(aProperty);
|
|
|
|
AppendValueToString(subprops[0], aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
AppendValueToString(subprops[1], aValue);
|
|
aValue.Append(PRUnichar(' '));
|
|
AppendValueToString(subprops[2], aValue);
|
|
break;
|
|
}
|
|
case eCSSProperty__moz_transform: {
|
|
// shorthands that are just aliases with different parsing rules
|
|
const nsCSSProperty* subprops =
|
|
nsCSSProps::SubpropertyEntryFor(aProperty);
|
|
NS_ABORT_IF_FALSE(subprops[1] == eCSSProperty_UNKNOWN,
|
|
"must have exactly one subproperty");
|
|
AppendValueToString(subprops[0], aValue);
|
|
break;
|
|
}
|
|
case eCSSProperty_all:
|
|
// If we got here, then we didn't have all "inherit" or "initial" or
|
|
// "unset" values for all of the longhand property components of 'all'.
|
|
// There is no other possible value that is valid for all properties,
|
|
// so serialize as the empty string.
|
|
break;
|
|
default:
|
|
NS_ABORT_IF_FALSE(false, "no other shorthands");
|
|
break;
|
|
}
|
|
}
|
|
|
|
bool
|
|
Declaration::GetValueIsImportant(const nsAString& aProperty) const
|
|
{
|
|
nsCSSProperty propID = nsCSSProps::LookupProperty(aProperty, nsCSSProps::eAny);
|
|
if (propID == eCSSProperty_UNKNOWN) {
|
|
return false;
|
|
}
|
|
return GetValueIsImportant(propID);
|
|
}
|
|
|
|
bool
|
|
Declaration::GetValueIsImportant(nsCSSProperty aProperty) const
|
|
{
|
|
if (!mImportantData)
|
|
return false;
|
|
|
|
// Calling ValueFor is inefficient, but we can assume '!important' is rare.
|
|
|
|
if (!nsCSSProps::IsShorthand(aProperty)) {
|
|
return mImportantData->ValueFor(aProperty) != nullptr;
|
|
}
|
|
|
|
CSSPROPS_FOR_SHORTHAND_SUBPROPERTIES(p, aProperty) {
|
|
if (*p == eCSSProperty__x_system_font) {
|
|
// The system_font subproperty doesn't count.
|
|
continue;
|
|
}
|
|
if (!mImportantData->ValueFor(*p)) {
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
void
|
|
Declaration::AppendPropertyAndValueToString(nsCSSProperty aProperty,
|
|
nsAutoString& aValue,
|
|
nsAString& aResult) const
|
|
{
|
|
NS_ABORT_IF_FALSE(0 <= aProperty && aProperty < eCSSProperty_COUNT,
|
|
"property enum out of range");
|
|
NS_ABORT_IF_FALSE((aProperty < eCSSProperty_COUNT_no_shorthands) ==
|
|
aValue.IsEmpty(),
|
|
"aValue should be given for shorthands but not longhands");
|
|
AppendASCIItoUTF16(nsCSSProps::GetStringValue(aProperty), aResult);
|
|
aResult.AppendLiteral(": ");
|
|
if (aValue.IsEmpty())
|
|
AppendValueToString(aProperty, aResult);
|
|
else
|
|
aResult.Append(aValue);
|
|
if (GetValueIsImportant(aProperty)) {
|
|
aResult.AppendLiteral(" ! important");
|
|
}
|
|
aResult.AppendLiteral("; ");
|
|
}
|
|
|
|
void
|
|
Declaration::ToString(nsAString& aString) const
|
|
{
|
|
// Someone cares about this declaration's contents, so don't let it
|
|
// change from under them. See e.g. bug 338679.
|
|
SetImmutable();
|
|
|
|
nsCSSCompressedDataBlock *systemFontData =
|
|
GetValueIsImportant(eCSSProperty__x_system_font) ? mImportantData : mData;
|
|
const nsCSSValue *systemFont =
|
|
systemFontData->ValueFor(eCSSProperty__x_system_font);
|
|
const bool haveSystemFont = systemFont &&
|
|
systemFont->GetUnit() != eCSSUnit_None &&
|
|
systemFont->GetUnit() != eCSSUnit_Null;
|
|
bool didSystemFont = false;
|
|
|
|
int32_t count = mOrder.Length();
|
|
int32_t index;
|
|
nsAutoTArray<nsCSSProperty, 16> shorthandsUsed;
|
|
for (index = 0; index < count; index++) {
|
|
nsCSSProperty property = OrderValueAt(index);
|
|
if (!nsCSSProps::IsEnabled(property)) {
|
|
continue;
|
|
}
|
|
bool doneProperty = false;
|
|
|
|
// If we already used this property in a shorthand, skip it.
|
|
if (shorthandsUsed.Length() > 0) {
|
|
for (const nsCSSProperty *shorthands =
|
|
nsCSSProps::ShorthandsContaining(property);
|
|
*shorthands != eCSSProperty_UNKNOWN; ++shorthands) {
|
|
if (shorthandsUsed.Contains(*shorthands)) {
|
|
doneProperty = true;
|
|
break;
|
|
}
|
|
}
|
|
if (doneProperty)
|
|
continue;
|
|
}
|
|
|
|
// Try to use this property in a shorthand.
|
|
nsAutoString value;
|
|
for (const nsCSSProperty *shorthands =
|
|
nsCSSProps::ShorthandsContaining(property);
|
|
*shorthands != eCSSProperty_UNKNOWN; ++shorthands) {
|
|
// ShorthandsContaining returns the shorthands in order from those
|
|
// that contain the most subproperties to those that contain the
|
|
// least, which is exactly the order we want to test them.
|
|
nsCSSProperty shorthand = *shorthands;
|
|
|
|
// If GetValue gives us a non-empty string back, we can use that
|
|
// value; otherwise it's not possible to use this shorthand.
|
|
GetValue(shorthand, value);
|
|
if (!value.IsEmpty()) {
|
|
AppendPropertyAndValueToString(shorthand, value, aString);
|
|
shorthandsUsed.AppendElement(shorthand);
|
|
doneProperty = true;
|
|
break;
|
|
}
|
|
|
|
NS_ABORT_IF_FALSE(shorthand != eCSSProperty_font ||
|
|
*(shorthands + 1) == eCSSProperty_UNKNOWN,
|
|
"font should always be the only containing shorthand");
|
|
if (shorthand == eCSSProperty_font) {
|
|
if (haveSystemFont && !didSystemFont) {
|
|
// Output the shorthand font declaration that we will
|
|
// partially override later. But don't add it to
|
|
// |shorthandsUsed|, since we will have to override it.
|
|
systemFont->AppendToString(eCSSProperty__x_system_font, value);
|
|
AppendPropertyAndValueToString(eCSSProperty_font, value, aString);
|
|
value.Truncate();
|
|
didSystemFont = true;
|
|
}
|
|
|
|
// That we output the system font is enough for this property if:
|
|
// (1) it's the hidden system font subproperty (which either
|
|
// means we output it or we don't have it), or
|
|
// (2) its value is the hidden system font value and it matches
|
|
// the hidden system font subproperty in importance, and
|
|
// we output the system font subproperty.
|
|
const nsCSSValue *val = systemFontData->ValueFor(property);
|
|
if (property == eCSSProperty__x_system_font ||
|
|
(haveSystemFont && val && val->GetUnit() == eCSSUnit_System_Font)) {
|
|
doneProperty = true;
|
|
}
|
|
}
|
|
}
|
|
if (doneProperty)
|
|
continue;
|
|
|
|
NS_ABORT_IF_FALSE(value.IsEmpty(), "value should be empty now");
|
|
AppendPropertyAndValueToString(property, value, aString);
|
|
}
|
|
if (! aString.IsEmpty()) {
|
|
// if the string is not empty, we have trailing whitespace we
|
|
// should remove
|
|
aString.Truncate(aString.Length() - 1);
|
|
}
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
void
|
|
Declaration::List(FILE* out, int32_t aIndent) const
|
|
{
|
|
for (int32_t index = aIndent; --index >= 0; ) fputs(" ", out);
|
|
|
|
fputs("{ ", out);
|
|
nsAutoString s;
|
|
ToString(s);
|
|
fputs(NS_ConvertUTF16toUTF8(s).get(), out);
|
|
fputs("}", out);
|
|
}
|
|
#endif
|
|
|
|
bool
|
|
Declaration::GetNthProperty(uint32_t aIndex, nsAString& aReturn) const
|
|
{
|
|
aReturn.Truncate();
|
|
if (aIndex < mOrder.Length()) {
|
|
nsCSSProperty property = OrderValueAt(aIndex);
|
|
if (0 <= property) {
|
|
AppendASCIItoUTF16(nsCSSProps::GetStringValue(property), aReturn);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void
|
|
Declaration::InitializeEmpty()
|
|
{
|
|
NS_ABORT_IF_FALSE(!mData && !mImportantData, "already initialized");
|
|
mData = nsCSSCompressedDataBlock::CreateEmptyBlock();
|
|
}
|
|
|
|
Declaration*
|
|
Declaration::EnsureMutable()
|
|
{
|
|
NS_ABORT_IF_FALSE(mData, "should only be called when not expanded");
|
|
if (!IsMutable()) {
|
|
return new Declaration(*this);
|
|
} else {
|
|
return this;
|
|
}
|
|
}
|
|
|
|
size_t
|
|
Declaration::SizeOfIncludingThis(mozilla::MallocSizeOf aMallocSizeOf) const
|
|
{
|
|
size_t n = aMallocSizeOf(this);
|
|
n += mOrder.SizeOfExcludingThis(aMallocSizeOf);
|
|
n += mData ? mData ->SizeOfIncludingThis(aMallocSizeOf) : 0;
|
|
n += mImportantData ? mImportantData->SizeOfIncludingThis(aMallocSizeOf) : 0;
|
|
return n;
|
|
}
|
|
|
|
} // namespace mozilla::css
|
|
} // namespace mozilla
|