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664e93ad34
From 8f5dccf7fd5f5d2a74341ead60586346e4ab3ead Mon Sep 17 00:00:00 2001 Now throwing javascript exceptions from attribute setters for TextTrack-related DOM classes. As can be seen in http://dev.w3.org/html5/webvtt/#webvtt-api, some of the attributes require validation and throwing. There is no validation implemented to the align property because there is a bug opened against the spec to change it to an Enum. When cleared, it should have the IDL changed to remove the throwing. Validation comments were removed from the properties that didn't have proper validation defined by the spec.
365 lines
8.5 KiB
C++
365 lines
8.5 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 et tw=78: */
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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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#ifndef mozilla_dom_TextTrackCue_h
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#define mozilla_dom_TextTrackCue_h
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#include "mozilla/dom/DocumentFragment.h"
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#include "mozilla/dom/TextTrack.h"
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#include "mozilla/dom/TextTrackCueBinding.h"
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#include "nsCycleCollectionParticipant.h"
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#include "nsDOMEventTargetHelper.h"
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#include "nsIDocument.h"
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struct webvtt_node;
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namespace mozilla {
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namespace dom {
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class HTMLTrackElement;
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class TextTrack;
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class TextTrackCue MOZ_FINAL : public nsDOMEventTargetHelper
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{
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public:
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NS_DECL_ISUPPORTS_INHERITED
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NS_DECL_CYCLE_COLLECTION_SCRIPT_HOLDER_CLASS_INHERITED(TextTrackCue,
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nsDOMEventTargetHelper)
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// TextTrackCue WebIDL
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// See bug 868509 about splitting out the WebVTT-specific interfaces.
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static already_AddRefed<TextTrackCue>
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Constructor(GlobalObject& aGlobal,
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double aStartTime,
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double aEndTime,
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const nsAString& aText,
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ErrorResult& aRv)
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{
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nsRefPtr<TextTrackCue> ttcue = new TextTrackCue(aGlobal.Get(), aStartTime,
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aEndTime, aText, aRv);
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return ttcue.forget();
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}
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TextTrackCue(nsISupports* aGlobal, double aStartTime, double aEndTime,
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const nsAString& aText, ErrorResult& aRv);
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TextTrackCue(nsISupports* aGlobal, double aStartTime, double aEndTime,
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const nsAString& aText, HTMLTrackElement* aTrackElement,
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webvtt_node* head, ErrorResult& aRv);
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~TextTrackCue();
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virtual JSObject* WrapObject(JSContext* aCx,
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JS::Handle<JSObject*> aScope) MOZ_OVERRIDE;
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nsINode* GetParentObject()
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{
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return mDocument;
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}
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TextTrack* GetTrack() const
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{
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return mTrack;
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}
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void GetId(nsAString& aId) const
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{
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aId = mId;
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}
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void SetId(const nsAString& aId)
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{
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if (mId == aId) {
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return;
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}
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mId = aId;
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CueChanged();
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}
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double StartTime() const
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{
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return mStartTime;
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}
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void SetStartTime(double aStartTime)
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{
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if (mStartTime == aStartTime)
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return;
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mStartTime = aStartTime;
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CueChanged();
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}
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double EndTime() const
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{
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return mEndTime;
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}
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void SetEndTime(double aEndTime)
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{
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if (mEndTime == aEndTime)
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return;
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mEndTime = aEndTime;
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CueChanged();
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}
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bool PauseOnExit()
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{
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return mPauseOnExit;
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}
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void SetPauseOnExit(bool aPauseOnExit)
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{
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if (mPauseOnExit == aPauseOnExit)
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return;
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mPauseOnExit = aPauseOnExit;
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CueChanged();
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}
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void GetVertical(nsAString& aVertical)
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{
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aVertical = mVertical;
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}
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void SetVertical(const nsAString& aVertical, ErrorResult& aRv)
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{
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if (mVertical == aVertical)
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return;
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if (!aVertical.EqualsLiteral("rl") && !aVertical.EqualsLiteral("lr") && !aVertical.IsEmpty()){
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aRv.Throw(NS_ERROR_DOM_SYNTAX_ERR);
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return;
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}
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mReset = true;
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mVertical = aVertical;
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CueChanged();
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}
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bool SnapToLines()
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{
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return mSnapToLines;
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}
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void SetSnapToLines(bool aSnapToLines)
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{
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if (mSnapToLines == aSnapToLines)
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return;
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mReset = true;
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mSnapToLines = aSnapToLines;
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CueChanged();
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}
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double Line() const
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{
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return mLine;
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}
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void SetLine(double aLine)
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{
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//XXX: TODO Line position can be a keyword auto. bug882299
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mReset = true;
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mLine = aLine;
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}
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int32_t Position() const
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{
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return mPosition;
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}
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void SetPosition(int32_t aPosition, ErrorResult& aRv)
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{
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// XXXhumph: validate? bug 868519.
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if (mPosition == aPosition)
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return;
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if (aPosition > 100 || aPosition < 0){
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return;
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}
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mReset = true;
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mPosition = aPosition;
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CueChanged();
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}
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int32_t Size() const
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{
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return mSize;
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}
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void SetSize(int32_t aSize, ErrorResult& aRv)
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{
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if (mSize == aSize) {
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return;
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}
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if (aSize < 0 || aSize > 100) {
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aRv.Throw(NS_ERROR_DOM_INDEX_SIZE_ERR);
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return;
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}
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mReset = true;
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mSize = aSize;
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CueChanged();
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}
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TextTrackCueAlign Align() const
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{
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return mAlign;
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}
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void SetAlign(TextTrackCueAlign& aAlign)
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{
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if (mAlign == aAlign)
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return;
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mReset = true;
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mAlign = aAlign;
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CueChanged();
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}
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void GetText(nsAString& aText) const
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{
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aText = mText;
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}
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void SetText(const nsAString& aText)
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{
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if (mText == aText)
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return;
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mReset = true;
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mText = aText;
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CueChanged();
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}
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already_AddRefed<DocumentFragment> GetCueAsHTML() const
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{
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// XXXhumph: todo. Bug 868509.
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return nullptr;
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}
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IMPL_EVENT_HANDLER(enter)
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IMPL_EVENT_HANDLER(exit)
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// Helper functions for implementation.
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bool
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operator==(const TextTrackCue& rhs) const
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{
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return mId.Equals(rhs.mId);
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}
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const nsAString& Id() const
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{
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return mId;
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}
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/**
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* Overview of WEBVTT cuetext and anonymous content setup.
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*
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* webvtt_nodes are the parsed version of WEBVTT cuetext. WEBVTT cuetext is
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* the portion of a WEBVTT cue that specifies what the caption will actually
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* show up as on screen.
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*
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* WEBVTT cuetext can contain markup that loosely relates to HTML markup. It
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* can contain tags like <b>, <u>, <i>, <c>, <v>, <ruby>, <rt>, <lang>,
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* including timestamp tags.
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*
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* When the caption is ready to be displayed the webvtt_nodes are converted
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* over to anonymous DOM content. <i>, <u>, <b>, <ruby>, and <rt> all become
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* HTMLElements of their corresponding HTML markup tags. <c> and <v> are
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* converted to <span> tags. Timestamp tags are converted to XML processing
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* instructions. Additionally, all cuetext tags support specifying of classes.
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* This takes the form of <foo.class.subclass>. These classes are then parsed
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* and set as the anonymous content's class attribute.
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*
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* Rules on constructing DOM objects from webvtt_nodes can be found here
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* http://dev.w3.org/html5/webvtt/#webvtt-cue-text-dom-construction-rules.
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* Current rules are taken from revision on April 15, 2013.
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*/
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/**
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* Converts the TextTrackCue's cuetext into a tree of DOM objects and attaches
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* it to a div on it's owning TrackElement's MediaElement's caption overlay.
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*/
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void RenderCue();
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/**
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* Produces a tree of anonymous content based on the tree of the processed
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* cue text. This lives in a tree of C nodes whose head is mHead.
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*
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* Returns a DocumentFragment that is the head of the tree of anonymous
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* content.
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*/
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already_AddRefed<DocumentFragment> GetCueAsHTML();
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/**
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* Converts mHead to a list of DOM elements and attaches it to aParentContent.
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*
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* Processes the C node tree in a depth-first pre-order traversal and creates
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* a mirrored DOM tree. The conversion rules come from the webvtt DOM
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* construction rules:
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* http://dev.w3.org/html5/webvtt/#webvtt-cue-text-dom-construction-rules
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* Current rules taken from revision on May 13, 2013.
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*/
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void
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ConvertNodeTreeToDOMTree(nsIContent* aParentContent);
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/**
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* Converts an internal webvtt node, i.e. one that has children, to an
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* anonymous HTMLElement.
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*/
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already_AddRefed<nsIContent>
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ConvertInternalNodeToContent(const webvtt_node* aWebVTTNode);
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/**
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* Converts a leaf webvtt node, i.e. one that does not have children, to
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* either a text node or processing instruction.
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*/
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already_AddRefed<nsIContent>
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ConvertLeafNodeToContent(const webvtt_node* aWebVTTNode);
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private:
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void CueChanged();
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void SetDefaultCueSettings();
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void CreateCueOverlay();
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nsresult StashDocument(nsISupports* aGlobal);
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nsRefPtr<nsIDocument> mDocument;
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nsString mText;
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double mStartTime;
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double mEndTime;
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nsRefPtr<TextTrack> mTrack;
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nsRefPtr<HTMLTrackElement> mTrackElement;
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webvtt_node *mHead;
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nsString mId;
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int32_t mPosition;
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int32_t mSize;
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bool mPauseOnExit;
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bool mSnapToLines;
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nsString mVertical;
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int mLine;
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TextTrackCueAlign mAlign;
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// Holds the computed DOM elements that represent the parsed cue text.
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// http://www.whatwg.org/specs/web-apps/current-work/#text-track-cue-display-state
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nsCOMPtr<nsIContent> mDisplayState;
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// Tells whether or not we need to recompute mDisplayState. This is set
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// anytime a property that relates to the display of the TextTrackCue is
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// changed.
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bool mReset;
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};
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} // namespace dom
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} // namespace mozilla
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#endif // mozilla_dom_TextTrackCue_h
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