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Commit 7928011b authored by mstensho's avatar mstensho Committed by Commit bot
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Add PageBoundaryRule parameter to columnSetAtBlockOffset(). 

If it's an exclusive end offset, we need to know this, so that we map to the
former column set, rather than the latter, if the offset is at a column set
boundary.

Review-Url: https://codereview.chromium.org/2340213003
Cr-Commit-Position: refs/heads/master@{#418839}
parent 8bf47bb4
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Showing with 135 additions and 61 deletions
third_party/WebKit/LayoutTests/fast/multicol/vertical-lr/offset-top-and-left-at-boundaries.html
View file @ 7928011b
<!DOCTYPE html>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<div style="position:relative; writing-mode:vertical-lr; columns:3; column-gap:10px; column-fill:auto; width:100px; height:320px;">
<div style="position:relative; writing-mode:vertical-lr; columns:3; column-gap:10px; height:320px;">
<div id="first" style="width:100px;"></div>
<div id="second" style="width:100px;"></div>
<div id="third" style="width:100px;"></div>
<div id="spanner" style="column-span:all; width:50px;"></div>
<div id="fifth" style="width:100px;"></div>
<div id="sixth" style="width:100px;"></div>
<div id="seventh" style="width:100px;"></div>
</div>
<script>
test(function() {
assert_equals(document.getElementById('first').offsetLeft, 0);
......@@ -21,4 +26,24 @@
assert_equals(document.getElementById('third').offsetLeft, 0);
assert_equals(document.getElementById('third').offsetTop, 220);
}, "offsetLeft and offsetTop in vertical-lr at column boundaries, third element");
test(function() {
assert_equals(document.getElementById('spanner').offsetLeft, 100);
assert_equals(document.getElementById('spanner').offsetTop, 0);
}, "offsetLeft and offsetTop in vertical-lr, spanner");
test(function() {
assert_equals(document.getElementById('fifth').offsetLeft, 150);
assert_equals(document.getElementById('fifth').offsetTop, 0);
}, "offsetLeft and offsetTop in vertical-lr at column boundaries, fifth element");
test(function() {
assert_equals(document.getElementById('sixth').offsetLeft, 150);
assert_equals(document.getElementById('sixth').offsetTop, 110);
}, "offsetLeft and offsetTop in vertical-lr at column boundaries, sixth element");
test(function() {
assert_equals(document.getElementById('seventh').offsetLeft, 150);
assert_equals(document.getElementById('seventh').offsetTop, 220);
}, "offsetLeft and offsetTop in vertical-lr at column boundaries, seventh element");
</script>
third_party/WebKit/LayoutTests/fast/multicol/vertical-rl/offset-top-and-left-at-boundaries.html
View file @ 7928011b
<!DOCTYPE html>
<script src="../../../resources/testharness.js"></script>
<script src="../../../resources/testharnessreport.js"></script>
<div style="position:relative; writing-mode:vertical-rl; columns:3; column-gap:10px; column-fill:auto; width:100px; height:320px;">
<div style="position:relative; writing-mode:vertical-rl; columns:3; column-gap:10px; height:320px;">
<div id="first" style="width:100px;"></div>
<div id="second" style="width:100px;"></div>
<div id="third" style="width:100px;"></div>
<div id="spanner" style="column-span:all; width:50px;"></div>
<div id="fifth" style="width:100px;"></div>
<div id="sixth" style="width:100px;"></div>
<div id="seventh" style="width:100px;"></div>
</div>
<script>
test(function() {
assert_equals(document.getElementById('first').offsetLeft, 0);
assert_equals(document.getElementById('first').offsetLeft, 150);
assert_equals(document.getElementById('first').offsetTop, 0);
}, "offsetLeft and offsetTop in vertical-rl at column boundaries, first element");
test(function() {
assert_equals(document.getElementById('second').offsetLeft, 0);
assert_equals(document.getElementById('second').offsetLeft, 150);
assert_equals(document.getElementById('second').offsetTop, 110);
}, "offsetLeft and offsetTop in vertical-rl at column boundaries, second element");
test(function() {
assert_equals(document.getElementById('third').offsetLeft, 0);
assert_equals(document.getElementById('third').offsetLeft, 150);
assert_equals(document.getElementById('third').offsetTop, 220);
}, "offsetLeft and offsetTop in vertical-rl at column boundaries, third element");
test(function() {
assert_equals(document.getElementById('spanner').offsetLeft, 100);
assert_equals(document.getElementById('spanner').offsetTop, 0);
}, "offsetLeft and offsetTop in vertical-rl, spanner");
test(function() {
assert_equals(document.getElementById('fifth').offsetLeft, 0);
assert_equals(document.getElementById('fifth').offsetTop, 0);
}, "offsetLeft and offsetTop in vertical-rl at column boundaries, fifth element");
test(function() {
assert_equals(document.getElementById('sixth').offsetLeft, 0);
assert_equals(document.getElementById('sixth').offsetTop, 110);
}, "offsetLeft and offsetTop in vertical-rl at column boundaries, sixth element");
test(function() {
assert_equals(document.getElementById('seventh').offsetLeft, 0);
assert_equals(document.getElementById('seventh').offsetTop, 220);
}, "offsetLeft and offsetTop in vertical-rl at column boundaries, seventh element");
</script>
third_party/WebKit/Source/core/layout/FragmentainerIterator.cpp
View file @ 7928011b
......@@ -28,7 +28,7 @@ FragmentainerIterator::FragmentainerIterator(const LayoutFlowThread& flowThread,
}
// Jump to the first interesting column set.
m_currentColumnSet = flowThread.columnSetAtBlockOffset(m_logicalTopInFlowThread);
m_currentColumnSet = flowThread.columnSetAtBlockOffset(m_logicalTopInFlowThread, LayoutBox::AssociateWithLatterPage);
if (!m_currentColumnSet || m_currentColumnSet->logicalTopInFlowThread() >= m_logicalBottomInFlowThread) {
setAtEnd();
return;
......
third_party/WebKit/Source/core/layout/LayoutFlowThread.cpp
View file @ 7928011b
......@@ -130,7 +130,7 @@ bool LayoutFlowThread::nodeAtPoint(HitTestResult& result, const HitTestLocation&
LayoutUnit LayoutFlowThread::pageLogicalHeightForOffset(LayoutUnit offset)
{
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(offset);
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(offset, AssociateWithLatterPage);
if (!columnSet)
return LayoutUnit();
......@@ -139,7 +139,7 @@ LayoutUnit LayoutFlowThread::pageLogicalHeightForOffset(LayoutUnit offset)
LayoutUnit LayoutFlowThread::pageRemainingLogicalHeightForOffset(LayoutUnit offset, PageBoundaryRule pageBoundaryRule)
{
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(offset);
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(offset, pageBoundaryRule);
if (!columnSet)
return LayoutUnit();
......@@ -157,7 +157,7 @@ void LayoutFlowThread::generateColumnSetIntervalTree()
LayoutUnit LayoutFlowThread::nextLogicalTopForUnbreakableContent(LayoutUnit flowThreadOffset, LayoutUnit contentLogicalHeight) const
{
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(flowThreadOffset);
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(flowThreadOffset, AssociateWithLatterPage);
if (!columnSet)
return flowThreadOffset;
return columnSet->nextLogicalTopForUnbreakableContent(flowThreadOffset, contentLogicalHeight);
......
third_party/WebKit/Source/core/layout/LayoutFlowThread.h
View file @ 7928011b
......@@ -127,7 +127,7 @@ public:
virtual LayoutPoint flowThreadPointToVisualPoint(const LayoutPoint& flowThreadPoint) const = 0;
virtual LayoutPoint visualPointToFlowThreadPoint(const LayoutPoint& visualPoint) const = 0;
virtual LayoutMultiColumnSet* columnSetAtBlockOffset(LayoutUnit) const = 0;
virtual LayoutMultiColumnSet* columnSetAtBlockOffset(LayoutUnit, PageBoundaryRule) const = 0;
virtual const char* name() const = 0;
......
third_party/WebKit/Source/core/layout/LayoutMultiColumnFlowThread.cpp
View file @ 7928011b
......@@ -307,7 +307,7 @@ LayoutUnit LayoutMultiColumnFlowThread::maxColumnLogicalHeight() const
LayoutUnit LayoutMultiColumnFlowThread::tallestUnbreakableLogicalHeight(LayoutUnit offsetInFlowThread) const
{
if (LayoutMultiColumnSet* multicolSet = columnSetAtBlockOffset(offsetInFlowThread))
if (LayoutMultiColumnSet* multicolSet = columnSetAtBlockOffset(offsetInFlowThread, AssociateWithLatterPage))
return multicolSet->tallestUnbreakableLogicalHeight();
return LayoutUnit();
}
......@@ -336,7 +336,7 @@ LayoutSize LayoutMultiColumnFlowThread::flowThreadTranslationAtOffset(LayoutUnit
{
if (!hasValidColumnSetInfo())
return LayoutSize(0, 0);
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(offsetInFlowThread);
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(offsetInFlowThread, rule);
if (!columnSet)
return LayoutSize(0, 0);
return columnSet->flowThreadTranslationAtOffset(offsetInFlowThread, rule, mode);
......@@ -374,15 +374,16 @@ LayoutPoint LayoutMultiColumnFlowThread::visualPointToFlowThreadPoint(const Layo
int LayoutMultiColumnFlowThread::inlineBlockBaseline(LineDirectionMode lineDirection) const
{
LayoutUnit baselineInFlowThread = LayoutUnit(LayoutFlowThread::inlineBlockBaseline(lineDirection));
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(baselineInFlowThread);
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(baselineInFlowThread, AssociateWithLatterPage);
if (!columnSet)
return baselineInFlowThread.toInt();
return (baselineInFlowThread - columnSet->pageLogicalTopForOffset(baselineInFlowThread)).ceil();
}
LayoutMultiColumnSet* LayoutMultiColumnFlowThread::columnSetAtBlockOffset(LayoutUnit offset) const
LayoutMultiColumnSet* LayoutMultiColumnFlowThread::columnSetAtBlockOffset(LayoutUnit offset, PageBoundaryRule pageBoundaryRule) const
{
if (LayoutMultiColumnSet* columnSet = m_lastSetWorkedOn) {
LayoutMultiColumnSet* columnSet = m_lastSetWorkedOn;
if (columnSet) {
// Layout in progress. We are calculating the set heights as we speak, so the column set range
// information is not up to date.
while (columnSet->logicalTopInFlowThread() > offset) {
......@@ -394,22 +395,29 @@ LayoutMultiColumnSet* LayoutMultiColumnFlowThread::columnSetAtBlockOffset(Layout
break;
columnSet = previousSet;
}
return columnSet;
} else {
DCHECK(!m_columnSetsInvalidated);
if (m_multiColumnSetList.isEmpty())
return nullptr;
if (offset < LayoutUnit())
return m_multiColumnSetList.first();
MultiColumnSetSearchAdapter adapter(offset);
m_multiColumnSetIntervalTree.allOverlapsWithAdapter<MultiColumnSetSearchAdapter>(adapter);
// If no set was found, the offset is in the flow thread overflow.
if (!adapter.result() && !m_multiColumnSetList.isEmpty())
return m_multiColumnSetList.last();
columnSet = adapter.result();
}
ASSERT(!m_columnSetsInvalidated);
if (m_multiColumnSetList.isEmpty())
return nullptr;
if (offset < LayoutUnit())
return m_multiColumnSetList.first();
MultiColumnSetSearchAdapter adapter(offset);
m_multiColumnSetIntervalTree.allOverlapsWithAdapter<MultiColumnSetSearchAdapter>(adapter);
// If no set was found, the offset is in the flow thread overflow.
if (!adapter.result() && !m_multiColumnSetList.isEmpty())
return m_multiColumnSetList.last();
return adapter.result();
if (pageBoundaryRule == AssociateWithFormerPage && columnSet && offset == columnSet->logicalTopInFlowThread()) {
// The column set that we found starts at the exact same flow thread offset as we specified.
// Since we are to associate offsets at boundaries with the former fragmentainer, the
// fragmentainer we're looking for is in the previous column set.
if (LayoutMultiColumnSet* previousSet = columnSet->previousSiblingMultiColumnSet())
return previousSet;
}
return columnSet;
}
void LayoutMultiColumnFlowThread::layoutColumns(SubtreeLayoutScope& layoutScope)
......@@ -515,12 +523,7 @@ void LayoutMultiColumnFlowThread::appendNewFragmentainerGroupIfNeeded(LayoutUnit
// Its height is indefinite for now.
return;
}
// TODO(mstensho): If pageBoundaryRule is AssociateWithFormerPage, offsetInFlowThread is an
// endpoint-exclusive offset, i.e. the offset just after the bottom of some object. So, ideally,
// columnSetAtBlockOffset() should be informed about this (i.e. take a PageBoundaryRule
// argument). This is not the only place with this issue; see also
// pageRemainingLogicalHeightForOffset().
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(offsetInFlowThread);
LayoutMultiColumnSet* columnSet = columnSetAtBlockOffset(offsetInFlowThread, pageBoundaryRule);
if (columnSet->isInitialHeightCalculated()) {
// We only insert additional fragmentainer groups in the initial layout pass. We only want
// to balance columns in the last fragmentainer group (if we need to balance at all), so we
......
third_party/WebKit/Source/core/layout/LayoutMultiColumnFlowThread.h
View file @ 7928011b
......@@ -199,7 +199,7 @@ public:
int inlineBlockBaseline(LineDirectionMode) const override;
LayoutMultiColumnSet* columnSetAtBlockOffset(LayoutUnit) const final;
LayoutMultiColumnSet* columnSetAtBlockOffset(LayoutUnit, PageBoundaryRule) const final;
void layoutColumns(SubtreeLayoutScope&);
......
third_party/WebKit/Source/core/layout/LayoutMultiColumnFlowThreadTest.cpp
View file @ 7928011b
......@@ -281,16 +281,23 @@ TEST_F(MultiColumnRenderingTest, columnSetAtBlockOffset)
LayoutMultiColumnFlowThread* flowThread = findFlowThread("mc");
EXPECT_EQ(columnSetSignature(flowThread), "cscsc");
LayoutMultiColumnSet* firstRow = flowThread->firstMultiColumnSet();
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(-10000)), firstRow); // negative overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit()), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(499)), firstRow); // bottom of last line in first row.
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(-10000), LayoutBox::AssociateWithFormerPage), firstRow); // negative overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(-10000), LayoutBox::AssociateWithLatterPage), firstRow); // negative overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(), LayoutBox::AssociateWithFormerPage), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(), LayoutBox::AssociateWithLatterPage), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(499), LayoutBox::AssociateWithFormerPage), firstRow); // bottom of last line in first row.
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(499), LayoutBox::AssociateWithLatterPage), firstRow); // bottom of last line in first row.
LayoutMultiColumnSet* secondRow = firstRow->nextSiblingMultiColumnSet();
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(500)), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(699)), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(500), LayoutBox::AssociateWithFormerPage), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(500), LayoutBox::AssociateWithLatterPage), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(699), LayoutBox::AssociateWithFormerPage), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(699), LayoutBox::AssociateWithLatterPage), secondRow);
LayoutMultiColumnSet* thirdRow = secondRow->nextSiblingMultiColumnSet();
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(700)), thirdRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(799)), thirdRow); // bottom of last row
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(10000)), thirdRow); // overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(700), LayoutBox::AssociateWithFormerPage), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(700), LayoutBox::AssociateWithLatterPage), thirdRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(799), LayoutBox::AssociateWithLatterPage), thirdRow); // bottom of last row
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(10000), LayoutBox::AssociateWithFormerPage), thirdRow); // overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(10000), LayoutBox::AssociateWithLatterPage), thirdRow); // overflow
}
TEST_F(MultiColumnRenderingTest, columnSetAtBlockOffsetVerticalRl)
......@@ -299,16 +306,23 @@ TEST_F(MultiColumnRenderingTest, columnSetAtBlockOffsetVerticalRl)
LayoutMultiColumnFlowThread* flowThread = findFlowThread("mc");
EXPECT_EQ(columnSetSignature(flowThread), "cscsc");
LayoutMultiColumnSet* firstRow = flowThread->firstMultiColumnSet();
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(-10000)), firstRow); // negative overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit()), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(499)), firstRow); // bottom of last line in first row.
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(-10000), LayoutBox::AssociateWithFormerPage), firstRow); // negative overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(-10000), LayoutBox::AssociateWithLatterPage), firstRow); // negative overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(), LayoutBox::AssociateWithFormerPage), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(), LayoutBox::AssociateWithLatterPage), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(499), LayoutBox::AssociateWithFormerPage), firstRow); // bottom of last line in first row.
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(499), LayoutBox::AssociateWithLatterPage), firstRow); // bottom of last line in first row.
LayoutMultiColumnSet* secondRow = firstRow->nextSiblingMultiColumnSet();
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(500)), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(699)), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(500), LayoutBox::AssociateWithFormerPage), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(500), LayoutBox::AssociateWithLatterPage), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(699), LayoutBox::AssociateWithFormerPage), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(699), LayoutBox::AssociateWithLatterPage), secondRow);
LayoutMultiColumnSet* thirdRow = secondRow->nextSiblingMultiColumnSet();
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(700)), thirdRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(799)), thirdRow); // bottom of last row
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(10000)), thirdRow); // overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(700), LayoutBox::AssociateWithFormerPage), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(700), LayoutBox::AssociateWithLatterPage), thirdRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(799), LayoutBox::AssociateWithLatterPage), thirdRow); // bottom of last row
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(10000), LayoutBox::AssociateWithFormerPage), thirdRow); // overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(10000), LayoutBox::AssociateWithLatterPage), thirdRow); // overflow
}
TEST_F(MultiColumnRenderingTest, columnSetAtBlockOffsetVerticalLr)
......@@ -317,16 +331,23 @@ TEST_F(MultiColumnRenderingTest, columnSetAtBlockOffsetVerticalLr)
LayoutMultiColumnFlowThread* flowThread = findFlowThread("mc");
EXPECT_EQ(columnSetSignature(flowThread), "cscsc");
LayoutMultiColumnSet* firstRow = flowThread->firstMultiColumnSet();
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(-10000)), firstRow); // negative overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit()), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(499)), firstRow); // bottom of last line in first row.
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(-10000), LayoutBox::AssociateWithFormerPage), firstRow); // negative overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(-10000), LayoutBox::AssociateWithLatterPage), firstRow); // negative overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(), LayoutBox::AssociateWithFormerPage), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(), LayoutBox::AssociateWithLatterPage), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(499), LayoutBox::AssociateWithFormerPage), firstRow); // bottom of last line in first row.
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(499), LayoutBox::AssociateWithLatterPage), firstRow); // bottom of last line in first row.
LayoutMultiColumnSet* secondRow = firstRow->nextSiblingMultiColumnSet();
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(500)), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(699)), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(500), LayoutBox::AssociateWithFormerPage), firstRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(500), LayoutBox::AssociateWithLatterPage), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(699), LayoutBox::AssociateWithFormerPage), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(699), LayoutBox::AssociateWithLatterPage), secondRow);
LayoutMultiColumnSet* thirdRow = secondRow->nextSiblingMultiColumnSet();
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(700)), thirdRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(799)), thirdRow); // bottom of last row
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(10000)), thirdRow); // overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(700), LayoutBox::AssociateWithFormerPage), secondRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(700), LayoutBox::AssociateWithLatterPage), thirdRow);
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(799), LayoutBox::AssociateWithLatterPage), thirdRow); // bottom of last row
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(10000), LayoutBox::AssociateWithFormerPage), thirdRow); // overflow
EXPECT_EQ(flowThread->columnSetAtBlockOffset(LayoutUnit(10000), LayoutBox::AssociateWithLatterPage), thirdRow); // overflow
}
class MultiColumnTreeModifyingTest : public MultiColumnRenderingTest {
......
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