mirror of
https://github.com/mozilla/gecko-dev.git
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129 lines
3.8 KiB
C++
129 lines
3.8 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set expandtab shiftwidth=2 tabstop=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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#include "StyleInfo.h"
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#include "mozilla/dom/Element.h"
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#include "nsComputedDOMStyle.h"
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#include "nsCSSProps.h"
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#include "nsIFrame.h"
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using namespace mozilla;
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using namespace mozilla::a11y;
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StyleInfo::StyleInfo(dom::Element* aElement, nsIPresShell* aPresShell) :
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mElement(aElement)
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{
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mStyleContext =
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nsComputedDOMStyle::GetStyleContextForElementNoFlush(aElement,
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nullptr,
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aPresShell);
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}
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void
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StyleInfo::Display(nsAString& aValue)
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{
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aValue.Truncate();
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AppendASCIItoUTF16(
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nsCSSProps::ValueToKeyword(mStyleContext->StyleDisplay()->mDisplay,
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nsCSSProps::kDisplayKTable), aValue);
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}
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void
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StyleInfo::TextAlign(nsAString& aValue)
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{
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aValue.Truncate();
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AppendASCIItoUTF16(
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nsCSSProps::ValueToKeyword(mStyleContext->StyleText()->mTextAlign,
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nsCSSProps::kTextAlignKTable), aValue);
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}
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void
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StyleInfo::TextIndent(nsAString& aValue)
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{
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aValue.Truncate();
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const nsStyleCoord& styleCoord =
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mStyleContext->StyleText()->mTextIndent;
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nscoord coordVal = 0;
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switch (styleCoord.GetUnit()) {
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case eStyleUnit_Coord:
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coordVal = styleCoord.GetCoordValue();
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break;
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case eStyleUnit_Percent:
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{
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nsIFrame* frame = mElement->GetPrimaryFrame();
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MOZ_ASSERT(frame, "frame must be a valid pointer.");
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nsIFrame* containerFrame = frame->GetContainingBlock();
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nscoord percentageBase = containerFrame->GetContentRect().width;
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coordVal = NSCoordSaturatingMultiply(percentageBase,
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styleCoord.GetPercentValue());
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break;
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}
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case eStyleUnit_Null:
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case eStyleUnit_Normal:
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case eStyleUnit_Auto:
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case eStyleUnit_None:
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case eStyleUnit_Factor:
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case eStyleUnit_Degree:
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case eStyleUnit_Grad:
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case eStyleUnit_Radian:
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case eStyleUnit_Turn:
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case eStyleUnit_FlexFraction:
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case eStyleUnit_Integer:
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case eStyleUnit_Enumerated:
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case eStyleUnit_Calc:
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break;
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}
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aValue.AppendFloat(nsPresContext::AppUnitsToFloatCSSPixels(coordVal));
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aValue.AppendLiteral("px");
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}
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void
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StyleInfo::Margin(css::Side aSide, nsAString& aValue)
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{
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MOZ_ASSERT(mElement->GetPrimaryFrame(), " mElement->GetPrimaryFrame() needs to be valid pointer");
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aValue.Truncate();
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nscoord coordVal = mElement->GetPrimaryFrame()->GetUsedMargin().Side(aSide);
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aValue.AppendFloat(nsPresContext::AppUnitsToFloatCSSPixels(coordVal));
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aValue.AppendLiteral("px");
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}
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void
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StyleInfo::FormatColor(const nscolor& aValue, nsString& aFormattedValue)
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{
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// Combine the string like rgb(R, G, B) from nscolor.
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aFormattedValue.AppendLiteral("rgb(");
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aFormattedValue.AppendInt(NS_GET_R(aValue));
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aFormattedValue.AppendLiteral(", ");
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aFormattedValue.AppendInt(NS_GET_G(aValue));
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aFormattedValue.AppendLiteral(", ");
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aFormattedValue.AppendInt(NS_GET_B(aValue));
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aFormattedValue.Append(')');
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}
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void
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StyleInfo::FormatFontStyle(const nscoord& aValue, nsAString& aFormattedValue)
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{
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nsCSSKeyword keyword =
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nsCSSProps::ValueToKeywordEnum(aValue, nsCSSProps::kFontStyleKTable);
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AppendUTF8toUTF16(nsCSSKeywords::GetStringValue(keyword), aFormattedValue);
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}
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void
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StyleInfo::FormatTextDecorationStyle(uint8_t aValue, nsAString& aFormattedValue)
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{
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nsCSSKeyword keyword =
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nsCSSProps::ValueToKeywordEnum(aValue,
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nsCSSProps::kTextDecorationStyleKTable);
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AppendUTF8toUTF16(nsCSSKeywords::GetStringValue(keyword), aFormattedValue);
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}
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