зеркало из https://github.com/mozilla/gecko-dev.git
108 строки
3.7 KiB
C++
108 строки
3.7 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) : mElement(aElement) {
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mComputedStyle =
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nsComputedDOMStyle::GetComputedStyleNoFlush(aElement, nullptr);
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}
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void StyleInfo::Display(nsAString& aValue) {
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aValue.Truncate();
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nsAutoCString value;
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mComputedStyle->GetComputedPropertyValue(eCSSProperty_display, value);
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CopyUTF8toUTF16(value, aValue);
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}
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void StyleInfo::TextAlign(nsAString& aValue) {
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aValue.Truncate();
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nsAutoCString value;
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mComputedStyle->GetComputedPropertyValue(eCSSProperty_text_align, value);
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CopyUTF8toUTF16(value, aValue);
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}
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void StyleInfo::TextIndent(nsAString& aValue) {
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aValue.Truncate();
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const auto& textIndent = mComputedStyle->StyleText()->mTextIndent;
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if (textIndent.ConvertsToLength()) {
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aValue.AppendFloat(textIndent.ToLengthInCSSPixels());
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aValue.AppendLiteral("px");
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return;
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}
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if (textIndent.ConvertsToPercentage()) {
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aValue.AppendFloat(textIndent.ToPercentage() * 100);
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aValue.AppendLiteral("%");
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return;
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}
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// FIXME: This doesn't handle calc in any meaningful way? Probably should just
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// use the Servo serialization code...
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aValue.AppendLiteral("0px");
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}
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void StyleInfo::Margin(Side aSide, nsAString& aValue) {
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MOZ_ASSERT(mElement->GetPrimaryFrame(),
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" mElement->GetPrimaryFrame() needs to be valid pointer");
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aValue.Truncate();
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nsIFrame* frame = mElement->GetPrimaryFrame();
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// This is here only to guarantee that we do the same as getComputedStyle
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// does, so that we don't hit precision errors in tests.
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auto& margin = frame->StyleMargin()->mMargin.Get(aSide);
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if (margin.ConvertsToLength()) {
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aValue.AppendFloat(margin.AsLengthPercentage().ToLengthInCSSPixels());
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} else {
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nscoord coordVal = frame->GetUsedMargin().Side(aSide);
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aValue.AppendFloat(CSSPixel::FromAppUnits(coordVal));
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}
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aValue.AppendLiteral("px");
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}
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void StyleInfo::FormatColor(const nscolor& aValue, nsString& aFormattedValue) {
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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 StyleInfo::FormatTextDecorationStyle(uint8_t aValue,
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nsAString& aFormattedValue) {
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// TODO: When these are enum classes that rust also understands we should just
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// make an FFI call here.
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switch (aValue) {
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case NS_STYLE_TEXT_DECORATION_STYLE_NONE:
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return aFormattedValue.AssignASCII("-moz-none");
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case NS_STYLE_TEXT_DECORATION_STYLE_SOLID:
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return aFormattedValue.AssignASCII("solid");
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case NS_STYLE_TEXT_DECORATION_STYLE_DOUBLE:
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return aFormattedValue.AssignASCII("double");
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case NS_STYLE_TEXT_DECORATION_STYLE_DOTTED:
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return aFormattedValue.AssignASCII("dotted");
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case NS_STYLE_TEXT_DECORATION_STYLE_DASHED:
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return aFormattedValue.AssignASCII("dashed");
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case NS_STYLE_TEXT_DECORATION_STYLE_WAVY:
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return aFormattedValue.AssignASCII("wavy");
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default:
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MOZ_ASSERT_UNREACHABLE("Unknown decoration style");
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break;
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}
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}
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