forked from mirrors/gecko-dev
011d524740
We're converting to nscoord in some places unnecessarily, reducing the precision of the computed value we return. This makes some tests unnecessarily fail if we change the base of nscoord. Differential Revision: https://phabricator.services.mozilla.com/D79996
103 lines
3.6 KiB
C++
103 lines
3.6 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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mComputedStyle->GetComputedPropertyValue(eCSSProperty_display, aValue);
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}
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void StyleInfo::TextAlign(nsAString& aValue) {
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aValue.Truncate();
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mComputedStyle->GetComputedPropertyValue(eCSSProperty_text_align, 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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