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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "config.h"
#include "core/rendering/RenderMultiColumnFlowThread.h"
#include "core/rendering/RenderMultiColumnSet.h"
#include "core/rendering/RenderMultiColumnSpannerPlaceholder.h"
#include "core/rendering/RenderingTestHelper.h"
#include <gtest/gtest.h>
namespace blink {
namespace {
class MultiColumnRenderingTest : public RenderingTest {
public:
RenderMultiColumnFlowThread* findFlowThread(const char* id) const;
// Generate a signature string based on what kind of column boxes the flow thread has
// established. 'c' is used for regular column content sets, while 's' is used for spanners.
// '?' is used when there's an unknown box type (which should be considered a failure).
String columnSetSignature(RenderMultiColumnFlowThread*);
String columnSetSignature(const char* multicolId);
void setMulticolHTML(const String&);
};
RenderMultiColumnFlowThread* MultiColumnRenderingTest::findFlowThread(const char* id) const
{
Node* multicol = document().getElementById(id);
if (!multicol)
return 0;
RenderBlockFlow* multicolContainer = toRenderBlockFlow(multicol->renderer());
if (!multicolContainer)
return 0;
return multicolContainer->multiColumnFlowThread();
}
String MultiColumnRenderingTest::columnSetSignature(RenderMultiColumnFlowThread* flowThread)
{
String signature = "";
for (RenderBox* columnBox = flowThread->firstMultiColumnBox();
columnBox;
columnBox = columnBox->nextSiblingMultiColumnBox()) {
if (columnBox->isRenderMultiColumnSpannerPlaceholder())
signature.append('s');
else if (columnBox->isRenderMultiColumnSet())
signature.append('c');
else
signature.append('?');
}
return signature;
}
String MultiColumnRenderingTest::columnSetSignature(const char* multicolId)
{
return columnSetSignature(findFlowThread(multicolId));
}
void MultiColumnRenderingTest::setMulticolHTML(const String& html)
{
const char* style =
"<style>"
" #mc { -webkit-columns:2; }"
" .s, #spanner, #spanner1, #spanner2 { -webkit-column-span:all; }"
"</style>";
setBodyInnerHTML(style + html);
}
TEST_F(MultiColumnRenderingTest, OneBlockWithInDepthTreeStructureCheck)
{
// Examine the render tree established by a simple multicol container with a block with some text inside.
setMulticolHTML("<div id='mc'><div>xxx</div></div>");
Node* multicol = document().getElementById("mc");
ASSERT_TRUE(multicol);
RenderBlockFlow* multicolContainer = toRenderBlockFlow(multicol->renderer());
ASSERT_TRUE(multicolContainer);
RenderMultiColumnFlowThread* flowThread = multicolContainer->multiColumnFlowThread();
ASSERT_TRUE(flowThread);
EXPECT_EQ(columnSetSignature(flowThread), "c");
EXPECT_EQ(flowThread->parent(), multicolContainer);
EXPECT_FALSE(flowThread->previousSibling());
RenderMultiColumnSet* columnSet = flowThread->firstMultiColumnSet();
ASSERT_TRUE(columnSet);
EXPECT_EQ(columnSet->previousSibling(), flowThread);
EXPECT_FALSE(columnSet->nextSibling());
RenderBlockFlow* block = toRenderBlockFlow(flowThread->firstChild());
ASSERT_TRUE(block);
EXPECT_FALSE(block->nextSibling());
ASSERT_TRUE(block->firstChild());
EXPECT_TRUE(block->firstChild()->isText());
EXPECT_FALSE(block->firstChild()->nextSibling());
}
TEST_F(MultiColumnRenderingTest, Empty)
{
// If there's no column content, there should be no column set.
setMulticolHTML("<div id='mc'></div>");
EXPECT_EQ(columnSetSignature("mc"), "");
}
TEST_F(MultiColumnRenderingTest, OneBlock)
{
// There is some content, so we should create a column set.
setMulticolHTML("<div id='mc'><div id='block'></div></div>");
ASSERT_EQ(columnSetSignature("mc"), "c");
}
TEST_F(MultiColumnRenderingTest, TwoBlocks)
{
// No matter how much content, we should only create one column set (unless there are spanners).
setMulticolHTML("<div id='mc'><div id='block1'></div><div id='block2'></div></div>");
ASSERT_EQ(columnSetSignature("mc"), "c");
}
TEST_F(MultiColumnRenderingTest, Spanner)
{
// With one spanner and no column content, we should create a spanner set.
setMulticolHTML("<div id='mc'><div id='spanner'></div></div>");
RenderMultiColumnFlowThread* flowThread = findFlowThread("mc");
ASSERT_EQ(columnSetSignature(flowThread), "s");
RenderBox* columnBox = flowThread->firstMultiColumnBox();
EXPECT_EQ(flowThread->firstMultiColumnSet(), nullptr);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner")->renderer()), columnBox);
EXPECT_EQ(document().getElementById("spanner")->renderer()->spannerPlaceholder(), columnBox);
}
TEST_F(MultiColumnRenderingTest, ContentThenSpanner)
{
// With some column content followed by a spanner, we need a column set followed by a spanner set.
setMulticolHTML("<div id='mc'><div id='columnContent'></div><div id='spanner'></div></div>");
RenderMultiColumnFlowThread* flowThread = findFlowThread("mc");
ASSERT_EQ(columnSetSignature(flowThread), "cs");
RenderBox* columnBox = flowThread->lastMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner")->renderer()), columnBox);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("columnContent")->renderer()), nullptr);
}
TEST_F(MultiColumnRenderingTest, SpannerThenContent)
{
// With a spanner followed by some column content, we need a spanner set followed by a column set.
setMulticolHTML("<div id='mc'><div id='spanner'></div><div id='columnContent'></div></div>");
RenderMultiColumnFlowThread* flowThread = findFlowThread("mc");
ASSERT_EQ(columnSetSignature(flowThread), "sc");
RenderBox* columnBox = flowThread->firstMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner")->renderer()), columnBox);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("columnContent")->renderer()), nullptr);
}
TEST_F(MultiColumnRenderingTest, ContentThenSpannerThenContent)
{
// With column content followed by a spanner followed by some column content, we need a column
// set followed by a spanner set followed by a column set.
setMulticolHTML("<div id='mc'><div id='columnContentBefore'></div><div id='spanner'></div><div id='columnContentAfter'></div></div>");
RenderMultiColumnFlowThread* flowThread = findFlowThread("mc");
ASSERT_EQ(columnSetSignature(flowThread), "csc");
RenderBox* columnBox = flowThread->firstMultiColumnSet()->nextSiblingMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("columnContentBefore")->renderer()), nullptr);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner")->renderer()), columnBox);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("columnContentAfter")->renderer()), nullptr);
}
TEST_F(MultiColumnRenderingTest, TwoSpanners)
{
// With two spanners and no column content, we need two spanner sets.
setMulticolHTML("<div id='mc'><div id='spanner1'></div><div id='spanner2'></div></div>");
RenderMultiColumnFlowThread* flowThread = findFlowThread("mc");
ASSERT_EQ(columnSetSignature(flowThread), "ss");
RenderBox* columnBox = flowThread->firstMultiColumnBox();
EXPECT_EQ(flowThread->firstMultiColumnSet(), nullptr);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner1")->renderer()), columnBox);
EXPECT_EQ(document().getElementById("spanner1")->renderer()->spannerPlaceholder(), columnBox);
columnBox = columnBox->nextSiblingMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner2")->renderer()), columnBox);
EXPECT_EQ(document().getElementById("spanner2")->renderer()->spannerPlaceholder(), columnBox);
}
TEST_F(MultiColumnRenderingTest, SpannerThenContentThenSpanner)
{
// With two spanners and some column content in-between, we need a spanner set, a column set and another spanner set.
setMulticolHTML("<div id='mc'><div id='spanner1'></div><div id='columnContent'></div><div id='spanner2'></div></div>");
RenderMultiColumnFlowThread* flowThread = findFlowThread("mc");
ASSERT_EQ(columnSetSignature(flowThread), "scs");
RenderMultiColumnSet* columnSet = flowThread->firstMultiColumnSet();
EXPECT_EQ(columnSet->nextSiblingMultiColumnSet(), nullptr);
RenderBox* columnBox = flowThread->firstMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner1")->renderer()), columnBox);
columnBox = columnBox->nextSiblingMultiColumnBox();
EXPECT_EQ(columnBox, columnSet);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("columnContent")->renderer()), nullptr);
columnBox = columnBox->nextSiblingMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner2")->renderer()), columnBox);
}
TEST_F(MultiColumnRenderingTest, SpannerWithSpanner)
{
// column-span:all on something inside column-span:all has no effect.
setMulticolHTML("<div id='mc'><div id='spanner'><div id='invalidSpanner' class='s'></div></div></div>");
RenderMultiColumnFlowThread* flowThread = findFlowThread("mc");
ASSERT_EQ(columnSetSignature(flowThread), "s");
RenderBox* columnBox = flowThread->firstMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner")->renderer()), columnBox);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("invalidSpanner")->renderer()), columnBox);
EXPECT_EQ(toRenderMultiColumnSpannerPlaceholder(columnBox)->rendererInFlowThread(), document().getElementById("spanner")->renderer());
EXPECT_EQ(document().getElementById("spanner")->renderer()->spannerPlaceholder(), columnBox);
EXPECT_EQ(document().getElementById("invalidSpanner")->renderer()->spannerPlaceholder(), nullptr);
}
TEST_F(MultiColumnRenderingTest, SubtreeWithSpanner)
{
setMulticolHTML("<div id='mc'><div id='outer'><div id='block1'></div><div id='spanner'></div><div id='block2'></div></div></div>");
RenderMultiColumnFlowThread* flowThread = findFlowThread("mc");
EXPECT_EQ(columnSetSignature(flowThread), "csc");
RenderBox* columnBox = flowThread->firstMultiColumnSet()->nextSiblingMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner")->renderer()), columnBox);
EXPECT_EQ(document().getElementById("spanner")->renderer()->spannerPlaceholder(), columnBox);
EXPECT_EQ(toRenderMultiColumnSpannerPlaceholder(columnBox)->rendererInFlowThread(), document().getElementById("spanner")->renderer());
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("outer")->renderer()), nullptr);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("block1")->renderer()), nullptr);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("block2")->renderer()), nullptr);
}
TEST_F(MultiColumnRenderingTest, SubtreeWithSpannerAfterSpanner)
{
setMulticolHTML("<div id='mc'><div id='spanner1'></div><div id='outer'>text<div id='spanner2'></div><div id='after'></div></div></div>");
RenderMultiColumnFlowThread* flowThread = findFlowThread("mc");
EXPECT_EQ(columnSetSignature(flowThread), "scsc");
RenderBox* columnBox = flowThread->firstMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner1")->renderer()), columnBox);
EXPECT_EQ(toRenderMultiColumnSpannerPlaceholder(columnBox)->rendererInFlowThread(), document().getElementById("spanner1")->renderer());
EXPECT_EQ(document().getElementById("spanner1")->renderer()->spannerPlaceholder(), columnBox);
columnBox = columnBox->nextSiblingMultiColumnBox()->nextSiblingMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner2")->renderer()), columnBox);
EXPECT_EQ(toRenderMultiColumnSpannerPlaceholder(columnBox)->rendererInFlowThread(), document().getElementById("spanner2")->renderer());
EXPECT_EQ(document().getElementById("spanner2")->renderer()->spannerPlaceholder(), columnBox);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("outer")->renderer()), nullptr);
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("after")->renderer()), nullptr);
}
TEST_F(MultiColumnRenderingTest, SubtreeWithSpannerBeforeSpanner)
{
setMulticolHTML("<div id='mc'><div id='outer'>text<div id='spanner1'></div>text</div><div id='spanner2'></div></div>");
RenderMultiColumnFlowThread* flowThread = findFlowThread("mc");
EXPECT_EQ(columnSetSignature(flowThread), "cscs");
RenderBox* columnBox = flowThread->firstMultiColumnSet()->nextSiblingMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner1")->renderer()), columnBox);
EXPECT_EQ(document().getElementById("spanner1")->renderer()->spannerPlaceholder(), columnBox);
EXPECT_EQ(toRenderMultiColumnSpannerPlaceholder(columnBox)->rendererInFlowThread(), document().getElementById("spanner1")->renderer());
columnBox = columnBox->nextSiblingMultiColumnBox()->nextSiblingMultiColumnBox();
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("spanner2")->renderer()), columnBox);
EXPECT_EQ(document().getElementById("spanner2")->renderer()->spannerPlaceholder(), columnBox);
EXPECT_EQ(toRenderMultiColumnSpannerPlaceholder(columnBox)->rendererInFlowThread(), document().getElementById("spanner2")->renderer());
EXPECT_EQ(flowThread->containingColumnSpannerPlaceholder(document().getElementById("outer")->renderer()), nullptr);
}
} // anonymous namespace
} // namespace blink
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