зеркало из https://github.com/mozilla/gecko-dev.git
Bug 839809: Make counter-increments and list counting that would go past our internal (int32_t) limit keep the counter at its current value rather than wrapping. r=dholbert
Per CSS WG resolution regarding counter-styles-3, afternoon of 2013-02-05: http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590 http://lists.w3.org/Archives/Public/www-style/2013Feb/0392.html Note that this patch depends on signed integer overflow behavior in C++, which I believe is portable despite being unspecified.
This commit is contained in:
L. David Baron
Родитель
221ad89967
Коммит
61dc418096
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@ -58,7 +58,8 @@ void nsCounterChangeNode::Calc(nsCounterList *aList)
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mValueAfter = mChangeValue;
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} else {
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NS_ASSERTION(mType == INCREMENT, "invalid type");
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mValueAfter = aList->ValueBefore(this) + mChangeValue;
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mValueAfter = nsCounterManager::IncrementCounter(aList->ValueBefore(this),
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mChangeValue);
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}
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}
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@ -229,6 +229,21 @@ public:
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void Dump();
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#endif
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static int32_t IncrementCounter(int32_t aOldValue, int32_t aIncrement)
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{
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int32_t newValue = aOldValue + aIncrement;
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// The CSS Working Group resolved that a counter-increment that
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// exceeds internal limits should not increment at all.
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// http://lists.w3.org/Archives/Public/www-style/2013Feb/0392.html
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// (This means, for example, that if aIncrement is 5, the
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// counter will get stuck at the largest multiple of 5 less than
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// the maximum 32-bit integer.)
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if ((aIncrement > 0) != (newValue > aOldValue)) {
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newValue = aOldValue;
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}
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return newValue;
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}
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private:
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// for |AddCounterResetsAndIncrements| only
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bool AddResetOrIncrement(nsIFrame *aFrame, int32_t aIndex,
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@ -6691,6 +6691,9 @@ nsBlockFrame::RenumberLists(nsPresContext* aPresContext)
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for (nsIContent* kid = mContent->GetFirstChild(); kid;
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kid = kid->GetNextSibling()) {
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if (kid->IsHTML(nsGkAtoms::li)) {
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// FIXME: This isn't right in terms of what CSS says to do for
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// overflow of counters (but it only matters when this node has
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// more than numeric_limits<int32_t>::max() children).
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ordinal -= increment;
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}
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}
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@ -21,6 +21,7 @@
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#include "nsNetUtil.h"
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#include "prprf.h"
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#include "nsDisplayList.h"
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#include "nsCounterManager.h"
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#include "imgILoader.h"
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#include "imgIContainer.h"
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@ -417,7 +418,7 @@ nsBulletFrame::SetListItemOrdinal(int32_t aNextOrdinal,
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*aChanged = oldOrdinal != mOrdinal;
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return mOrdinal + aIncrement;
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return nsCounterManager::IncrementCounter(mOrdinal, aIncrement);
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}
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@ -0,0 +1,26 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>css-counter-styles-3 Test Suite: content: counter(c)</title>
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<!--
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NOTE: This test cannot be contributed to the test suite because
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it presumes a 4-byte unsigned integer, which is not required by
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the spec.
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However, it tests the rules for what happens at the UA-specific
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limit, which are required by the spec.
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-->
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<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
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<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
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</head>
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<body>
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<div id="test">
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<span>2147483646</span>
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<span>2147483647</span>
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<span>2147483647</span>
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<span>2147483647</span>
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</div>
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</body>
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</html>
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@ -0,0 +1,33 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>css-counter-styles-3 Test Suite: content: counter(c)</title>
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<!--
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NOTE: This test cannot be contributed to the test suite because
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it presumes a 4-byte unsigned integer, which is not required by
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the spec.
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However, it tests the rules for what happens at the UA-specific
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limit, which are required by the spec.
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-->
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<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
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<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
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<style type="text/css">
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#test { counter-reset: c 2147483645; }
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#test span { counter-increment: c; }
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#test span:before { content: counter(c); }
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</style>
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</head>
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<body>
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<div id="test">
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<span></span>
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<span></span>
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<span></span>
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<span></span>
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</div>
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</body>
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</html>
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@ -0,0 +1,26 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>css-counter-styles-3 Test Suite: content: counter(c)</title>
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<!--
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NOTE: This test cannot be contributed to the test suite because
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it presumes a 4-byte unsigned integer, which is not required by
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the spec.
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However, it tests the rules for what happens at the UA-specific
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limit, which are required by the spec.
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-->
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<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
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<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
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</head>
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<body>
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<div id="test">
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<span>2147483640</span>
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<span>2147483645</span>
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<span>2147483645</span>
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<span>2147483645</span>
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</div>
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</body>
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</html>
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@ -0,0 +1,33 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>css-counter-styles-3 Test Suite: content: counter(c)</title>
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<!--
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NOTE: This test cannot be contributed to the test suite because
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it presumes a 4-byte unsigned integer, which is not required by
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the spec.
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However, it tests the rules for what happens at the UA-specific
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limit, which are required by the spec.
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-->
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<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
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<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
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<style type="text/css">
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#test { counter-reset: c 2147483635; }
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#test span { counter-increment: c 5; }
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#test span:before { content: counter(c); }
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</style>
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</head>
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<body>
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<div id="test">
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<span></span>
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<span></span>
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<span></span>
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<span></span>
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</div>
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</body>
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</html>
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@ -0,0 +1,26 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>css-counter-styles-3 Test Suite: content: counter(c)</title>
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<!--
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NOTE: This test cannot be contributed to the test suite because
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it presumes a 4-byte unsigned integer, which is not required by
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the spec.
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However, it tests the rules for what happens at the UA-specific
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limit, which are required by the spec.
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-->
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<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
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<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
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</head>
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<body>
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<div id="test">
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<span>-2147483646</span>
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<span>-2147483647</span>
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<span>-2147483648</span>
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<span>-2147483648</span>
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</div>
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</body>
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</html>
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@ -0,0 +1,33 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>css-counter-styles-3 Test Suite: content: counter(c)</title>
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<!--
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NOTE: This test cannot be contributed to the test suite because
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it presumes a 4-byte unsigned integer, which is not required by
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the spec.
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However, it tests the rules for what happens at the UA-specific
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limit, which are required by the spec.
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-->
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<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
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<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
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<style type="text/css">
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#test { counter-reset: c -2147483645; }
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#test span { counter-increment: c -1; }
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#test span:before { content: counter(c); }
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</style>
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</head>
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<body>
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<div id="test">
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<span></span>
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<span></span>
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<span></span>
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<span></span>
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</div>
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</body>
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</html>
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@ -0,0 +1,26 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>css-counter-styles-3 Test Suite: content: counter(c)</title>
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<!--
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NOTE: This test cannot be contributed to the test suite because
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it presumes a 4-byte unsigned integer, which is not required by
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the spec.
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However, it tests the rules for what happens at the UA-specific
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limit, which are required by the spec.
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-->
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<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
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<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
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</head>
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<body>
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<div id="test">
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<span>-2147483640</span>
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<span>-2147483645</span>
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<span>-2147483645</span>
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<span>-2147483645</span>
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</div>
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</body>
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</html>
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@ -0,0 +1,33 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>css-counter-styles-3 Test Suite: content: counter(c)</title>
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<!--
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NOTE: This test cannot be contributed to the test suite because
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it presumes a 4-byte unsigned integer, which is not required by
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the spec.
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However, it tests the rules for what happens at the UA-specific
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limit, which are required by the spec.
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-->
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<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
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<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
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<style type="text/css">
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#test { counter-reset: c -2147483635; }
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#test span { counter-increment: c -5; }
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#test span:before { content: counter(c); }
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</style>
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</head>
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<body>
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<div id="test">
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<span></span>
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<span></span>
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<span></span>
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<span></span>
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</div>
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</body>
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</html>
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@ -0,0 +1,33 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>test of counter UA overflow rules for HTML lists</title>
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<!--
|
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NOTE: This test cannot be contributed to the test suite because
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it presumes a 4-byte unsigned integer, which is not required by
|
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the spec. It also can't be contributed because it's testing HTML
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lists.
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However, it tests the rules for what happens at the UA-specific
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limit, which are required by the spec.
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-->
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<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
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<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
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<style type="text/css">
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ol { margin-left: 10em; padding-left: 0; }
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li { margin-left: 0; padding-left: 0 }
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</style>
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</head>
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<body>
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<ol>
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<li value="2147483646">Alpha
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<li value="2147483647">Bravo
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<li value="2147483647">Charlie
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<li value="2147483647">Delta
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</ol>
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</body>
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</html>
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|
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@ -0,0 +1,33 @@
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<!DOCTYPE html>
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<html>
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<head>
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<title>test of counter UA overflow rules for HTML lists</title>
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<!--
|
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NOTE: This test cannot be contributed to the test suite because
|
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it presumes a 4-byte unsigned integer, which is not required by
|
||||
the spec. It also can't be contributed because it's testing HTML
|
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lists.
|
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|
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However, it tests the rules for what happens at the UA-specific
|
||||
limit, which are required by the spec.
|
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-->
|
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<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
|
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<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
|
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<style type="text/css">
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ol { margin-left: 10em; padding-left: 0; }
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li { margin-left: 0; padding-left: 0 }
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</style>
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</head>
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<body>
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<ol start="2147483646">
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<li>Alpha
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<li>Bravo
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<li>Charlie
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<li>Delta
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</ol>
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|
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</body>
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</html>
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|
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@ -0,0 +1,50 @@
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<!DOCTYPE html>
|
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<html>
|
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<head>
|
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<title>test of counter UA overflow rules for HTML lists</title>
|
||||
<!--
|
||||
NOTE: This test cannot be contributed to the test suite because
|
||||
it presumes a 4-byte unsigned integer, which is not required by
|
||||
the spec. It also can't be contributed because it's testing HTML
|
||||
lists.
|
||||
|
||||
However, it tests the rules for what happens at the UA-specific
|
||||
limit, which are required by the spec.
|
||||
-->
|
||||
<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
|
||||
<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
|
||||
<style type="text/css">
|
||||
|
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ol { margin-left: 10em; padding-left: 0; }
|
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li { margin-left: 0; padding-left: 0 }
|
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li.hidden { visibility: hidden; height: 0 }
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ol { margin-bottom: 0 }
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ol + ol { margin-top: 0 }
|
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|
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</style>
|
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</head>
|
||||
<body>
|
||||
|
||||
<!--
|
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Work around our inability to parse -2147483648 as an HTML integer attribute
|
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(Bug 586761)
|
||||
-->
|
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<ol reversed start="-2147483645">
|
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<li class="hidden">hidden
|
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<li>Alpha
|
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</ol>
|
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<ol reversed start="-2147483646">
|
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<li class="hidden">hidden
|
||||
<li>Bravo
|
||||
</ol>
|
||||
<ol reversed start="-2147483647">
|
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<li class="hidden">hidden
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||||
<li>Charlie
|
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</ol>
|
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<ol reversed start="-2147483647">
|
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<li class="hidden">hidden
|
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<li>Delta
|
||||
</ol>
|
||||
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -0,0 +1,33 @@
|
|||
<!DOCTYPE html>
|
||||
<html>
|
||||
<head>
|
||||
<title>test of counter UA overflow rules for HTML lists</title>
|
||||
<!--
|
||||
NOTE: This test cannot be contributed to the test suite because
|
||||
it presumes a 4-byte unsigned integer, which is not required by
|
||||
the spec. It also can't be contributed because it's testing HTML
|
||||
lists.
|
||||
|
||||
However, it tests the rules for what happens at the UA-specific
|
||||
limit, which are required by the spec.
|
||||
-->
|
||||
<link rel="help" href="http://dev.w3.org/csswg/css-counter-styles-3/#counter-style-range"/>
|
||||
<link rel="help" href="http://krijnhoetmer.nl/irc-logs/css/20130205#l-1590"/>
|
||||
<style type="text/css">
|
||||
|
||||
ol { margin-left: 10em; padding-left: 0; }
|
||||
li { margin-left: 0; padding-left: 0 }
|
||||
|
||||
</style>
|
||||
</head>
|
||||
<body>
|
||||
|
||||
<ol reversed start="-2147483646">
|
||||
<li>Alpha
|
||||
<li>Bravo
|
||||
<li>Charlie
|
||||
<li>Delta
|
||||
</ol>
|
||||
|
||||
</body>
|
||||
</html>
|
||||
|
|
@ -61,3 +61,9 @@
|
|||
== counter-hebrew-test.html counter-hebrew-reference.html
|
||||
== counters-hebrew-test.html counters-hebrew-reference.html
|
||||
== counter-reset-integer-range.html counter-reset-integer-range-ref.html
|
||||
== counter-ua-limits-00.html counter-ua-limits-00-ref.html
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== counter-ua-limits-01.html counter-ua-limits-01-ref.html
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== counter-ua-limits-02.html counter-ua-limits-02-ref.html
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== counter-ua-limits-03.html counter-ua-limits-03-ref.html
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== counter-ua-limits-list-00.html counter-ua-limits-list-00-ref.html
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== counter-ua-limits-list-01.html counter-ua-limits-list-01-ref.html
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Загрузка…
Ссылка в новой задаче