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https://gitlab.winehq.org/wine/wine-gecko.git
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99260b9bb7
This is the key change in this patch series; it changes the object we use for style data (currently nsIStyleRule) identity. It allows removing some hacks we have to deal with that for StyleRule, and avoids having to write similar hacks for nsCSSKeyframeRule and nsCSSPageRule (which are broken without this). I confirmed locally that it is this patch that fixes both of the todo_is mochitests, by building and testing with the patch queue through patch 11, and again through patch 12.
109 lines
3.6 KiB
C++
109 lines
3.6 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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/*
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* a class that walks the lexicographic tree of rule nodes as style
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* rules are matched
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*/
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#ifndef nsRuleWalker_h_
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#define nsRuleWalker_h_
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#include "nsRuleNode.h"
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#include "nsIStyleRule.h"
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#include "Declaration.h"
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#include "nsQueryObject.h"
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class nsRuleWalker {
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public:
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nsRuleNode* CurrentNode() { return mCurrent; }
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void SetCurrentNode(nsRuleNode* aNode) {
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NS_ASSERTION(aNode, "Must have node here!");
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mCurrent = aNode;
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}
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nsPresContext* PresContext() const { return mRoot->PresContext(); }
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protected:
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void DoForward(nsIStyleRule* aRule) {
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mCurrent = mCurrent->Transition(aRule, mLevel, mImportance);
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NS_POSTCONDITION(mCurrent, "Transition messed up");
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}
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public:
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void Forward(nsIStyleRule* aRule) {
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NS_PRECONDITION(!RefPtr<mozilla::css::Declaration>(do_QueryObject(aRule)),
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"Calling the wrong Forward() overload");
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DoForward(aRule);
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}
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void Forward(mozilla::css::Declaration* aRule) {
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DoForward(aRule);
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mCheckForImportantRules =
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mCheckForImportantRules && !aRule->HasImportantData();
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}
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// ForwardOnPossiblyCSSRule should only be used by callers that have
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// an explicit list of rules they need to walk, with the list
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// already containing any important rules they care about.
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void ForwardOnPossiblyCSSRule(nsIStyleRule* aRule) {
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DoForward(aRule);
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}
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void Reset() { mCurrent = mRoot; }
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bool AtRoot() { return mCurrent == mRoot; }
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void SetLevel(mozilla::SheetType aLevel, bool aImportance,
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bool aCheckForImportantRules) {
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NS_ASSERTION(!aCheckForImportantRules || !aImportance,
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"Shouldn't be checking for important rules while walking "
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"important rules");
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mLevel = aLevel;
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mImportance = aImportance;
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mCheckForImportantRules = aCheckForImportantRules;
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}
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mozilla::SheetType GetLevel() const { return mLevel; }
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bool GetImportance() const { return mImportance; }
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bool GetCheckForImportantRules() const { return mCheckForImportantRules; }
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bool AuthorStyleDisabled() const { return mAuthorStyleDisabled; }
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// We define the visited-relevant link to be the link that is the
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// nearest self-or-ancestor to the node being matched.
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enum VisitedHandlingType {
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// Do rule matching as though all links are unvisited.
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eRelevantLinkUnvisited,
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// Do rule matching as though the relevant link is visited and all
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// other links are unvisited.
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eRelevantLinkVisited,
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// Do rule matching as though a rule should match if it would match
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// given any set of visitedness states. (used by users other than
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// nsRuleWalker)
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eLinksVisitedOrUnvisited
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};
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private:
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nsRuleNode* mCurrent; // Our current position. Never null.
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nsRuleNode* mRoot; // The root of the tree we're walking.
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mozilla::SheetType mLevel;
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bool mImportance;
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bool mCheckForImportantRules; // If true, check for important rules as
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// we walk and set to false if we find
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// one.
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bool mAuthorStyleDisabled;
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public:
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nsRuleWalker(nsRuleNode* aRoot, bool aAuthorStyleDisabled)
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: mCurrent(aRoot)
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, mRoot(aRoot)
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, mAuthorStyleDisabled(aAuthorStyleDisabled)
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{
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NS_ASSERTION(mCurrent, "Caller screwed up and gave us null node");
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MOZ_COUNT_CTOR(nsRuleWalker);
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}
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~nsRuleWalker() { MOZ_COUNT_DTOR(nsRuleWalker); }
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};
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#endif /* !defined(nsRuleWalker_h_) */
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