forked from mirrors/gecko-dev
756 lines
26 KiB
C++
756 lines
26 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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#include "TextAttrs.h"
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#include "LocalAccessible-inl.h"
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#include "AccAttributes.h"
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#include "nsAccUtils.h"
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#include "nsCoreUtils.h"
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#include "StyleInfo.h"
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#include "gfxTextRun.h"
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#include "nsFontMetrics.h"
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#include "nsLayoutUtils.h"
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#include "nsContainerFrame.h"
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#include "nsStyleUtil.h"
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#include "HyperTextAccessible.h"
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#include "mozilla/AppUnits.h"
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#include "mozilla/gfx/2D.h"
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using namespace mozilla;
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using namespace mozilla::a11y;
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////////////////////////////////////////////////////////////////////////////////
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// TextAttrsMgr
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////////////////////////////////////////////////////////////////////////////////
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void TextAttrsMgr::GetAttributes(AccAttributes* aAttributes,
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uint32_t* aStartOffset, uint32_t* aEndOffset) {
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// 1. Hyper text accessible must be specified always.
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// 2. Offset accessible must be specified in
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// the case of text attributes. Result hyper text offsets are optional if you
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// just want the attributes for a single text Accessible.
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// 3. Offset accessible and result hyper text offsets must not be specified
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// but include default text attributes flag and attributes list must be
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// specified in the case of default text attributes.
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MOZ_ASSERT(
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mHyperTextAcc && ((mOffsetAcc && mOffsetAccIdx != -1) ||
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(!mOffsetAcc && mOffsetAccIdx == -1 && !aStartOffset &&
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!aEndOffset && mIncludeDefAttrs && aAttributes)),
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"Wrong usage of TextAttrsMgr!");
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// Embedded objects are combined into own range with empty attributes set.
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if (mOffsetAcc && !mOffsetAcc->IsText()) {
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if (!aStartOffset) {
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return;
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}
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for (int32_t childIdx = mOffsetAccIdx - 1; childIdx >= 0; childIdx--) {
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LocalAccessible* currAcc = mHyperTextAcc->LocalChildAt(childIdx);
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if (currAcc->IsText()) break;
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(*aStartOffset)--;
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}
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uint32_t childCount = mHyperTextAcc->ChildCount();
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for (uint32_t childIdx = mOffsetAccIdx + 1; childIdx < childCount;
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childIdx++) {
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LocalAccessible* currAcc = mHyperTextAcc->LocalChildAt(childIdx);
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if (currAcc->IsText()) break;
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(*aEndOffset)++;
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}
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return;
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}
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// Get the content and frame of the accessible. In the case of document
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// accessible it's role content and root frame.
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nsIContent* hyperTextElm = mHyperTextAcc->GetContent();
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if (!hyperTextElm) {
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return; // XXX: we don't support text attrs on document with no body
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}
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nsIFrame* rootFrame = mHyperTextAcc->GetFrame();
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MOZ_ASSERT(rootFrame, "No frame for accessible!");
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if (!rootFrame) return;
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nsIContent *offsetNode = nullptr, *offsetElm = nullptr;
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nsIFrame* frame = nullptr;
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if (mOffsetAcc) {
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offsetNode = mOffsetAcc->GetContent();
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offsetElm = nsCoreUtils::GetDOMElementFor(offsetNode);
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MOZ_ASSERT(offsetElm, "No element for offset accessible!");
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if (!offsetElm) return;
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frame = offsetElm->GetPrimaryFrame();
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}
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// "language" text attribute
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LangTextAttr langTextAttr(mHyperTextAcc, hyperTextElm, offsetNode);
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// "aria-invalid" text attribute
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InvalidTextAttr invalidTextAttr(hyperTextElm, offsetNode);
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// "background-color" text attribute
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BGColorTextAttr bgColorTextAttr(rootFrame, frame);
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// "color" text attribute
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ColorTextAttr colorTextAttr(rootFrame, frame);
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// "font-family" text attribute
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FontFamilyTextAttr fontFamilyTextAttr(rootFrame, frame);
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// "font-size" text attribute
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FontSizeTextAttr fontSizeTextAttr(rootFrame, frame);
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// "font-style" text attribute
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FontStyleTextAttr fontStyleTextAttr(rootFrame, frame);
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// "font-weight" text attribute
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FontWeightTextAttr fontWeightTextAttr(rootFrame, frame);
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// "auto-generated" text attribute
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AutoGeneratedTextAttr autoGenTextAttr(mHyperTextAcc, mOffsetAcc);
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// "text-underline(line-through)-style(color)" text attributes
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TextDecorTextAttr textDecorTextAttr(rootFrame, frame);
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// "text-position" text attribute
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TextPosTextAttr textPosTextAttr(rootFrame, frame);
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TextAttr* attrArray[] = {
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&langTextAttr, &invalidTextAttr, &bgColorTextAttr,
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&colorTextAttr, &fontFamilyTextAttr, &fontSizeTextAttr,
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&fontStyleTextAttr, &fontWeightTextAttr, &autoGenTextAttr,
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&textDecorTextAttr, &textPosTextAttr};
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// Expose text attributes if applicable.
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if (aAttributes) {
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for (uint32_t idx = 0; idx < ArrayLength(attrArray); idx++) {
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attrArray[idx]->Expose(aAttributes, mIncludeDefAttrs);
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}
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}
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// Expose text attributes range where they are applied if applicable.
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if (aStartOffset) {
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GetRange(attrArray, ArrayLength(attrArray), aStartOffset, aEndOffset);
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}
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}
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void TextAttrsMgr::GetRange(TextAttr* aAttrArray[], uint32_t aAttrArrayLen,
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uint32_t* aStartOffset, uint32_t* aEndOffset) {
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// Navigate backward from anchor accessible to find start offset.
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for (int32_t childIdx = mOffsetAccIdx - 1; childIdx >= 0; childIdx--) {
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LocalAccessible* currAcc = mHyperTextAcc->LocalChildAt(childIdx);
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// Stop on embedded accessible since embedded accessibles are combined into
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// own range.
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if (!currAcc->IsText()) break;
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MOZ_ASSERT(nsCoreUtils::GetDOMElementFor(currAcc->GetContent()),
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"Text accessible has to have an associated DOM element");
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bool offsetFound = false;
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for (uint32_t attrIdx = 0; attrIdx < aAttrArrayLen; attrIdx++) {
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TextAttr* textAttr = aAttrArray[attrIdx];
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if (!textAttr->Equal(currAcc)) {
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offsetFound = true;
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break;
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}
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}
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if (offsetFound) break;
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*(aStartOffset) -= nsAccUtils::TextLength(currAcc);
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}
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// Navigate forward from anchor accessible to find end offset.
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uint32_t childLen = mHyperTextAcc->ChildCount();
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for (uint32_t childIdx = mOffsetAccIdx + 1; childIdx < childLen; childIdx++) {
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LocalAccessible* currAcc = mHyperTextAcc->LocalChildAt(childIdx);
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if (!currAcc->IsText()) break;
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MOZ_ASSERT(nsCoreUtils::GetDOMElementFor(currAcc->GetContent()),
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"Text accessible has to have an associated DOM element");
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bool offsetFound = false;
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for (uint32_t attrIdx = 0; attrIdx < aAttrArrayLen; attrIdx++) {
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TextAttr* textAttr = aAttrArray[attrIdx];
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// Alter the end offset when text attribute changes its value and stop
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// the search.
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if (!textAttr->Equal(currAcc)) {
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offsetFound = true;
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break;
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}
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}
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if (offsetFound) break;
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(*aEndOffset) += nsAccUtils::TextLength(currAcc);
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}
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}
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////////////////////////////////////////////////////////////////////////////////
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// LangTextAttr
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////////////////////////////////////////////////////////////////////////////////
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TextAttrsMgr::LangTextAttr::LangTextAttr(HyperTextAccessible* aRoot,
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nsIContent* aRootElm, nsIContent* aElm)
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: TTextAttr<nsString>(!aElm), mRootContent(aRootElm) {
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aRoot->Language(mRootNativeValue);
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mIsRootDefined = !mRootNativeValue.IsEmpty();
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if (aElm) {
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nsCoreUtils::GetLanguageFor(aElm, mRootContent, mNativeValue);
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mIsDefined = !mNativeValue.IsEmpty();
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}
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}
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TextAttrsMgr::LangTextAttr::~LangTextAttr() {}
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bool TextAttrsMgr::LangTextAttr::GetValueFor(LocalAccessible* aAccessible,
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nsString* aValue) {
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nsCoreUtils::GetLanguageFor(aAccessible->GetContent(), mRootContent, *aValue);
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return !aValue->IsEmpty();
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}
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void TextAttrsMgr::LangTextAttr::ExposeValue(AccAttributes* aAttributes,
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const nsString& aValue) {
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aAttributes->SetAttributeStringCopy(nsGkAtoms::language, aValue);
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}
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////////////////////////////////////////////////////////////////////////////////
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// InvalidTextAttr
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////////////////////////////////////////////////////////////////////////////////
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TextAttrsMgr::InvalidTextAttr::InvalidTextAttr(nsIContent* aRootElm,
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nsIContent* aElm)
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: TTextAttr<uint32_t>(!aElm), mRootElm(aRootElm) {
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mIsRootDefined = GetValue(mRootElm, &mRootNativeValue);
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if (aElm) mIsDefined = GetValue(aElm, &mNativeValue);
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}
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bool TextAttrsMgr::InvalidTextAttr::GetValueFor(LocalAccessible* aAccessible,
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uint32_t* aValue) {
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nsIContent* elm = nsCoreUtils::GetDOMElementFor(aAccessible->GetContent());
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return elm ? GetValue(elm, aValue) : false;
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}
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void TextAttrsMgr::InvalidTextAttr::ExposeValue(AccAttributes* aAttributes,
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const uint32_t& aValue) {
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switch (aValue) {
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case eFalse:
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aAttributes->SetAttribute(nsGkAtoms::invalid, nsGkAtoms::_false);
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break;
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case eGrammar:
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aAttributes->SetAttribute(nsGkAtoms::invalid, nsGkAtoms::grammar);
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break;
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case eSpelling:
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aAttributes->SetAttribute(nsGkAtoms::invalid, nsGkAtoms::spelling);
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break;
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case eTrue:
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aAttributes->SetAttribute(nsGkAtoms::invalid, nsGkAtoms::_true);
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break;
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}
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}
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bool TextAttrsMgr::InvalidTextAttr::GetValue(nsIContent* aElm,
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uint32_t* aValue) {
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nsIContent* elm = aElm;
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do {
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if (nsAccUtils::HasDefinedARIAToken(elm, nsGkAtoms::aria_invalid)) {
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static dom::Element::AttrValuesArray tokens[] = {
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nsGkAtoms::_false, nsGkAtoms::grammar, nsGkAtoms::spelling, nullptr};
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int32_t idx = elm->AsElement()->FindAttrValueIn(
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kNameSpaceID_None, nsGkAtoms::aria_invalid, tokens, eCaseMatters);
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switch (idx) {
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case 0:
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*aValue = eFalse;
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return true;
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case 1:
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*aValue = eGrammar;
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return true;
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case 2:
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*aValue = eSpelling;
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return true;
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default:
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*aValue = eTrue;
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return true;
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}
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}
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} while ((elm = elm->GetParent()) && elm != mRootElm);
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return false;
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}
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////////////////////////////////////////////////////////////////////////////////
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// BGColorTextAttr
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////////////////////////////////////////////////////////////////////////////////
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TextAttrsMgr::BGColorTextAttr::BGColorTextAttr(nsIFrame* aRootFrame,
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nsIFrame* aFrame)
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: TTextAttr<nscolor>(!aFrame), mRootFrame(aRootFrame) {
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mIsRootDefined = GetColor(mRootFrame, &mRootNativeValue);
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if (aFrame) mIsDefined = GetColor(aFrame, &mNativeValue);
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}
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bool TextAttrsMgr::BGColorTextAttr::GetValueFor(LocalAccessible* aAccessible,
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nscolor* aValue) {
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nsIContent* elm = nsCoreUtils::GetDOMElementFor(aAccessible->GetContent());
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if (elm) {
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nsIFrame* frame = elm->GetPrimaryFrame();
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if (frame) {
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return GetColor(frame, aValue);
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}
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}
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return false;
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}
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void TextAttrsMgr::BGColorTextAttr::ExposeValue(AccAttributes* aAttributes,
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const nscolor& aValue) {
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aAttributes->SetAttribute(nsGkAtoms::backgroundColor, Color{aValue});
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}
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bool TextAttrsMgr::BGColorTextAttr::GetColor(nsIFrame* aFrame,
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nscolor* aColor) {
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nscolor backgroundColor = aFrame->StyleBackground()->BackgroundColor(aFrame);
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if (NS_GET_A(backgroundColor) > 0) {
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*aColor = backgroundColor;
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return true;
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}
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nsContainerFrame* parentFrame = aFrame->GetParent();
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if (!parentFrame) {
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*aColor = aFrame->PresContext()->DefaultBackgroundColor();
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return true;
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}
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// Each frame of parents chain for the initially passed 'aFrame' has
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// transparent background color. So background color isn't changed from
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// 'mRootFrame' to initially passed 'aFrame'.
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if (parentFrame == mRootFrame) return false;
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return GetColor(parentFrame, aColor);
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}
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////////////////////////////////////////////////////////////////////////////////
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// ColorTextAttr
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////////////////////////////////////////////////////////////////////////////////
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TextAttrsMgr::ColorTextAttr::ColorTextAttr(nsIFrame* aRootFrame,
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nsIFrame* aFrame)
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: TTextAttr<nscolor>(!aFrame) {
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mRootNativeValue = aRootFrame->StyleText()->mColor.ToColor();
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mIsRootDefined = true;
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if (aFrame) {
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mNativeValue = aFrame->StyleText()->mColor.ToColor();
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mIsDefined = true;
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}
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}
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bool TextAttrsMgr::ColorTextAttr::GetValueFor(LocalAccessible* aAccessible,
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nscolor* aValue) {
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nsIContent* elm = nsCoreUtils::GetDOMElementFor(aAccessible->GetContent());
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if (elm) {
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if (nsIFrame* frame = elm->GetPrimaryFrame()) {
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*aValue = frame->StyleText()->mColor.ToColor();
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return true;
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}
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}
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return false;
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}
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void TextAttrsMgr::ColorTextAttr::ExposeValue(AccAttributes* aAttributes,
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const nscolor& aValue) {
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aAttributes->SetAttribute(nsGkAtoms::color, Color{aValue});
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}
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////////////////////////////////////////////////////////////////////////////////
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// FontFamilyTextAttr
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////////////////////////////////////////////////////////////////////////////////
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TextAttrsMgr::FontFamilyTextAttr::FontFamilyTextAttr(nsIFrame* aRootFrame,
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nsIFrame* aFrame)
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: TTextAttr<nsString>(!aFrame) {
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mIsRootDefined = GetFontFamily(aRootFrame, mRootNativeValue);
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if (aFrame) mIsDefined = GetFontFamily(aFrame, mNativeValue);
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}
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bool TextAttrsMgr::FontFamilyTextAttr::GetValueFor(LocalAccessible* aAccessible,
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nsString* aValue) {
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nsIContent* elm = nsCoreUtils::GetDOMElementFor(aAccessible->GetContent());
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if (elm) {
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nsIFrame* frame = elm->GetPrimaryFrame();
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if (frame) {
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return GetFontFamily(frame, *aValue);
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}
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}
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return false;
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}
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void TextAttrsMgr::FontFamilyTextAttr::ExposeValue(AccAttributes* aAttributes,
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const nsString& aValue) {
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aAttributes->SetAttributeStringCopy(nsGkAtoms::font_family, aValue);
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}
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bool TextAttrsMgr::FontFamilyTextAttr::GetFontFamily(nsIFrame* aFrame,
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nsString& aFamily) {
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RefPtr<nsFontMetrics> fm =
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nsLayoutUtils::GetFontMetricsForFrame(aFrame, 1.0f);
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gfxFontGroup* fontGroup = fm->GetThebesFontGroup();
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gfxFont* font = fontGroup->GetFirstValidFont();
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gfxFontEntry* fontEntry = font->GetFontEntry();
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aFamily.Append(NS_ConvertUTF8toUTF16(fontEntry->FamilyName()));
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return true;
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}
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////////////////////////////////////////////////////////////////////////////////
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// FontSizeTextAttr
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////////////////////////////////////////////////////////////////////////////////
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TextAttrsMgr::FontSizeTextAttr::FontSizeTextAttr(nsIFrame* aRootFrame,
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nsIFrame* aFrame)
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: TTextAttr<nscoord>(!aFrame) {
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mDC = aRootFrame->PresContext()->DeviceContext();
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mRootNativeValue = aRootFrame->StyleFont()->mSize.ToAppUnits();
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mIsRootDefined = true;
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if (aFrame) {
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mNativeValue = aFrame->StyleFont()->mSize.ToAppUnits();
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mIsDefined = true;
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}
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}
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bool TextAttrsMgr::FontSizeTextAttr::GetValueFor(LocalAccessible* aAccessible,
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nscoord* aValue) {
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nsIContent* el = nsCoreUtils::GetDOMElementFor(aAccessible->GetContent());
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if (el) {
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nsIFrame* frame = el->GetPrimaryFrame();
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if (frame) {
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*aValue = frame->StyleFont()->mSize.ToAppUnits();
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return true;
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}
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}
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return false;
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}
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void TextAttrsMgr::FontSizeTextAttr::ExposeValue(AccAttributes* aAttributes,
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const nscoord& aValue) {
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// Convert from nscoord to pt.
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//
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// Note: according to IA2, "The conversion doesn't have to be exact.
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// The intent is to give the user a feel for the size of the text."
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//
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// ATK does not specify a unit and will likely follow IA2 here.
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//
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// XXX todo: consider sharing this code with layout module? (bug 474621)
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float px = NSAppUnitsToFloatPixels(aValue, mozilla::AppUnitsPerCSSPixel());
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// Each pt is 4/3 of a CSS pixel.
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FontSize fontSize{NS_lround(px * 3 / 4)};
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aAttributes->SetAttribute(nsGkAtoms::font_size, fontSize);
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}
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////////////////////////////////////////////////////////////////////////////////
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// FontStyleTextAttr
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////////////////////////////////////////////////////////////////////////////////
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TextAttrsMgr::FontStyleTextAttr::FontStyleTextAttr(nsIFrame* aRootFrame,
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nsIFrame* aFrame)
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: TTextAttr<FontSlantStyle>(!aFrame) {
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mRootNativeValue = aRootFrame->StyleFont()->mFont.style;
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mIsRootDefined = true;
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if (aFrame) {
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mNativeValue = aFrame->StyleFont()->mFont.style;
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mIsDefined = true;
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}
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}
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bool TextAttrsMgr::FontStyleTextAttr::GetValueFor(LocalAccessible* aAccessible,
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FontSlantStyle* aValue) {
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nsIContent* elm = nsCoreUtils::GetDOMElementFor(aAccessible->GetContent());
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if (elm) {
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nsIFrame* frame = elm->GetPrimaryFrame();
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if (frame) {
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*aValue = frame->StyleFont()->mFont.style;
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return true;
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}
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}
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return false;
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}
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void TextAttrsMgr::FontStyleTextAttr::ExposeValue(
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AccAttributes* aAttributes, const FontSlantStyle& aValue) {
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if (aValue.IsNormal()) {
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aAttributes->SetAttribute(nsGkAtoms::font_style, nsGkAtoms::normal);
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} else if (aValue.IsItalic()) {
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RefPtr<nsAtom> atom = NS_Atomize("italic");
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aAttributes->SetAttribute(nsGkAtoms::font_style, atom);
|
|
} else {
|
|
auto angle = aValue.ObliqueAngle();
|
|
nsString string(u"oblique"_ns);
|
|
if (angle != FontSlantStyle::kDefaultAngle) {
|
|
string.AppendLiteral(" ");
|
|
nsStyleUtil::AppendCSSNumber(angle, string);
|
|
string.AppendLiteral("deg");
|
|
}
|
|
aAttributes->SetAttribute(nsGkAtoms::font_style, std::move(string));
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// FontWeightTextAttr
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
TextAttrsMgr::FontWeightTextAttr::FontWeightTextAttr(nsIFrame* aRootFrame,
|
|
nsIFrame* aFrame)
|
|
: TTextAttr<FontWeight>(!aFrame) {
|
|
mRootNativeValue = GetFontWeight(aRootFrame);
|
|
mIsRootDefined = true;
|
|
|
|
if (aFrame) {
|
|
mNativeValue = GetFontWeight(aFrame);
|
|
mIsDefined = true;
|
|
}
|
|
}
|
|
|
|
bool TextAttrsMgr::FontWeightTextAttr::GetValueFor(LocalAccessible* aAccessible,
|
|
FontWeight* aValue) {
|
|
nsIContent* elm = nsCoreUtils::GetDOMElementFor(aAccessible->GetContent());
|
|
if (elm) {
|
|
nsIFrame* frame = elm->GetPrimaryFrame();
|
|
if (frame) {
|
|
*aValue = GetFontWeight(frame);
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void TextAttrsMgr::FontWeightTextAttr::ExposeValue(AccAttributes* aAttributes,
|
|
const FontWeight& aValue) {
|
|
aAttributes->SetAttribute(nsGkAtoms::fontWeight, aValue.ToIntRounded());
|
|
}
|
|
|
|
FontWeight TextAttrsMgr::FontWeightTextAttr::GetFontWeight(nsIFrame* aFrame) {
|
|
// nsFont::width isn't suitable here because it's necessary to expose real
|
|
// value of font weight (used font might not have some font weight values).
|
|
RefPtr<nsFontMetrics> fm =
|
|
nsLayoutUtils::GetFontMetricsForFrame(aFrame, 1.0f);
|
|
|
|
gfxFontGroup* fontGroup = fm->GetThebesFontGroup();
|
|
gfxFont* font = fontGroup->GetFirstValidFont();
|
|
|
|
// When there doesn't exist a bold font in the family and so the rendering of
|
|
// a non-bold font face is changed so that the user sees what looks like a
|
|
// bold font, i.e. synthetic bolding is used. IsSyntheticBold method is only
|
|
// needed on Mac, but it is "safe" to use on all platforms. (For non-Mac
|
|
// platforms it always return false.)
|
|
if (font->IsSyntheticBold()) {
|
|
return FontWeight::Bold();
|
|
}
|
|
|
|
// On Windows, font->GetStyle()->weight will give the same weight as
|
|
// fontEntry->Weight(), the weight of the first font in the font group,
|
|
// which may not be the weight of the font face used to render the
|
|
// characters. On Mac, font->GetStyle()->weight will just give the same
|
|
// number as getComputedStyle(). fontEntry->Weight() will give the weight
|
|
// range supported by the font face used, so we clamp the weight that was
|
|
// requested by style to what is actually supported by the font.
|
|
gfxFontEntry* fontEntry = font->GetFontEntry();
|
|
return fontEntry->Weight().Clamp(font->GetStyle()->weight);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// AutoGeneratedTextAttr
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
TextAttrsMgr::AutoGeneratedTextAttr::AutoGeneratedTextAttr(
|
|
HyperTextAccessible* aHyperTextAcc, LocalAccessible* aAccessible)
|
|
: TTextAttr<bool>(!aAccessible) {
|
|
mRootNativeValue = false;
|
|
mIsRootDefined = false;
|
|
|
|
if (aAccessible) {
|
|
mIsDefined = mNativeValue =
|
|
((aAccessible->NativeRole() == roles::STATICTEXT) ||
|
|
(aAccessible->NativeRole() == roles::LISTITEM_MARKER));
|
|
}
|
|
}
|
|
|
|
bool TextAttrsMgr::AutoGeneratedTextAttr::GetValueFor(
|
|
LocalAccessible* aAccessible, bool* aValue) {
|
|
return *aValue = (aAccessible->NativeRole() == roles::STATICTEXT);
|
|
}
|
|
|
|
void TextAttrsMgr::AutoGeneratedTextAttr::ExposeValue(
|
|
AccAttributes* aAttributes, const bool& aValue) {
|
|
aAttributes->SetAttribute(nsGkAtoms::auto_generated, aValue);
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// TextDecorTextAttr
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
TextAttrsMgr::TextDecorValue::TextDecorValue(nsIFrame* aFrame) {
|
|
const nsStyleTextReset* textReset = aFrame->StyleTextReset();
|
|
mStyle = textReset->mTextDecorationStyle;
|
|
mColor = textReset->mTextDecorationColor.CalcColor(aFrame);
|
|
mLine =
|
|
textReset->mTextDecorationLine & (StyleTextDecorationLine::UNDERLINE |
|
|
StyleTextDecorationLine::LINE_THROUGH);
|
|
}
|
|
|
|
TextAttrsMgr::TextDecorTextAttr::TextDecorTextAttr(nsIFrame* aRootFrame,
|
|
nsIFrame* aFrame)
|
|
: TTextAttr<TextDecorValue>(!aFrame) {
|
|
mRootNativeValue = TextDecorValue(aRootFrame);
|
|
mIsRootDefined = mRootNativeValue.IsDefined();
|
|
|
|
if (aFrame) {
|
|
mNativeValue = TextDecorValue(aFrame);
|
|
mIsDefined = mNativeValue.IsDefined();
|
|
}
|
|
}
|
|
|
|
bool TextAttrsMgr::TextDecorTextAttr::GetValueFor(LocalAccessible* aAccessible,
|
|
TextDecorValue* aValue) {
|
|
nsIContent* elm = nsCoreUtils::GetDOMElementFor(aAccessible->GetContent());
|
|
if (elm) {
|
|
nsIFrame* frame = elm->GetPrimaryFrame();
|
|
if (frame) {
|
|
*aValue = TextDecorValue(frame);
|
|
return aValue->IsDefined();
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void TextAttrsMgr::TextDecorTextAttr::ExposeValue(
|
|
AccAttributes* aAttributes, const TextDecorValue& aValue) {
|
|
if (aValue.IsUnderline()) {
|
|
RefPtr<nsAtom> underlineStyle =
|
|
StyleInfo::TextDecorationStyleToAtom(aValue.Style());
|
|
aAttributes->SetAttribute(nsGkAtoms::textUnderlineStyle, underlineStyle);
|
|
|
|
aAttributes->SetAttribute(nsGkAtoms::textUnderlineColor,
|
|
Color{aValue.Color()});
|
|
return;
|
|
}
|
|
|
|
if (aValue.IsLineThrough()) {
|
|
RefPtr<nsAtom> lineThroughStyle =
|
|
StyleInfo::TextDecorationStyleToAtom(aValue.Style());
|
|
aAttributes->SetAttribute(nsGkAtoms::textLineThroughStyle,
|
|
lineThroughStyle);
|
|
|
|
aAttributes->SetAttribute(nsGkAtoms::textLineThroughColor,
|
|
Color{aValue.Color()});
|
|
}
|
|
}
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// TextPosTextAttr
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
TextAttrsMgr::TextPosTextAttr::TextPosTextAttr(nsIFrame* aRootFrame,
|
|
nsIFrame* aFrame)
|
|
: TTextAttr<TextPosValue>(!aFrame) {
|
|
mRootNativeValue = GetTextPosValue(aRootFrame);
|
|
mIsRootDefined = mRootNativeValue != eTextPosNone;
|
|
|
|
if (aFrame) {
|
|
mNativeValue = GetTextPosValue(aFrame);
|
|
mIsDefined = mNativeValue != eTextPosNone;
|
|
}
|
|
}
|
|
|
|
bool TextAttrsMgr::TextPosTextAttr::GetValueFor(LocalAccessible* aAccessible,
|
|
TextPosValue* aValue) {
|
|
nsIContent* elm = nsCoreUtils::GetDOMElementFor(aAccessible->GetContent());
|
|
if (elm) {
|
|
nsIFrame* frame = elm->GetPrimaryFrame();
|
|
if (frame) {
|
|
*aValue = GetTextPosValue(frame);
|
|
return *aValue != eTextPosNone;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
void TextAttrsMgr::TextPosTextAttr::ExposeValue(AccAttributes* aAttributes,
|
|
const TextPosValue& aValue) {
|
|
RefPtr<nsAtom> atom = nullptr;
|
|
switch (aValue) {
|
|
case eTextPosBaseline:
|
|
atom = nsGkAtoms::baseline;
|
|
break;
|
|
|
|
case eTextPosSub:
|
|
atom = nsGkAtoms::sub;
|
|
break;
|
|
|
|
case eTextPosSuper:
|
|
atom = NS_Atomize("super");
|
|
break;
|
|
|
|
case eTextPosNone:
|
|
break;
|
|
}
|
|
|
|
if (atom) {
|
|
aAttributes->SetAttribute(nsGkAtoms::textPosition, atom);
|
|
}
|
|
}
|
|
|
|
TextAttrsMgr::TextPosValue TextAttrsMgr::TextPosTextAttr::GetTextPosValue(
|
|
nsIFrame* aFrame) const {
|
|
const auto& verticalAlign = aFrame->StyleDisplay()->mVerticalAlign;
|
|
if (verticalAlign.IsKeyword()) {
|
|
switch (verticalAlign.AsKeyword()) {
|
|
case StyleVerticalAlignKeyword::Baseline:
|
|
return eTextPosBaseline;
|
|
case StyleVerticalAlignKeyword::Sub:
|
|
return eTextPosSub;
|
|
case StyleVerticalAlignKeyword::Super:
|
|
return eTextPosSuper;
|
|
// No good guess for the rest, so do not expose value of text-position
|
|
// attribute.
|
|
default:
|
|
return eTextPosNone;
|
|
}
|
|
}
|
|
|
|
const auto& length = verticalAlign.AsLength();
|
|
if (length.ConvertsToPercentage()) {
|
|
float percentValue = length.ToPercentage();
|
|
return percentValue > 0
|
|
? eTextPosSuper
|
|
: (percentValue < 0 ? eTextPosSub : eTextPosBaseline);
|
|
}
|
|
|
|
if (length.ConvertsToLength()) {
|
|
nscoord coordValue = length.ToLength();
|
|
return coordValue > 0 ? eTextPosSuper
|
|
: (coordValue < 0 ? eTextPosSub : eTextPosBaseline);
|
|
}
|
|
|
|
if (const nsIContent* content = aFrame->GetContent()) {
|
|
if (content->IsHTMLElement(nsGkAtoms::sup)) return eTextPosSuper;
|
|
if (content->IsHTMLElement(nsGkAtoms::sub)) return eTextPosSub;
|
|
}
|
|
|
|
return eTextPosNone;
|
|
}
|