Add views::RichLabel, a class which creates multi-line text with mixed

ui/views/controls/styled_label_unittest.cc

+// Copyright 2013 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 <string>
+
+#include "base/basictypes.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/utf_string_conversions.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/views/controls/link.h"
+#include "ui/views/controls/styled_label.h"
+#include "ui/views/controls/styled_label_listener.h"
+
+namespace views {
+
+class StyledLabelTest : public testing::Test, public StyledLabelListener {
+ public:
+  StyledLabelTest() {}
+  virtual ~StyledLabelTest() {}
+
+  // StyledLabelListener implementation.
+  virtual void StyledLabelLinkClicked(const ui::Range& range,
+                                      int event_flags) OVERRIDE {}
+
+ protected:
+  StyledLabel* styled() { return styled_.get(); }
+
+  void InitStyledLabel(const std::string& ascii_text) {
+    styled_.reset(new StyledLabel(ASCIIToUTF16(ascii_text), this));
+  }
+
+  int StyledLabelContentHeightForWidth(int w) {
+    return styled_->GetHeightForWidth(w) - styled_->GetInsets().height();
+  }
+
+ private:
+  scoped_ptr<StyledLabel> styled_;
+
+  DISALLOW_COPY_AND_ASSIGN(StyledLabelTest);
+};
+
+TEST_F(StyledLabelTest, NoWrapping) {
+  const std::string text("This is a test block of text");
+  InitStyledLabel(text);
+  Label label(ASCIIToUTF16(text));
+  const gfx::Size label_preferred_size = label.GetPreferredSize();
+  EXPECT_EQ(label_preferred_size.height(),
+            StyledLabelContentHeightForWidth(label_preferred_size.width() * 2));
+}
+
+TEST_F(StyledLabelTest, BasicWrapping) {
+  const std::string text("This is a test block of text");
+  InitStyledLabel(text);
+  Label label(ASCIIToUTF16(text.substr(0, text.size() * 2 / 3)));
+  gfx::Size label_preferred_size = label.GetPreferredSize();
+  EXPECT_EQ(label_preferred_size.height() * 2,
+            StyledLabelContentHeightForWidth(label_preferred_size.width()));
+
+  // Also respect the border.
+  styled()->set_border(Border::CreateEmptyBorder(3, 3, 3, 3));
+  styled()->SetBounds(
+      0,
+      0,
+      styled()->GetInsets().width() + label_preferred_size.width(),
+      styled()->GetInsets().height() + 2 * label_preferred_size.height());
+  styled()->Layout();
+  ASSERT_EQ(2, styled()->child_count());
+  EXPECT_EQ(3, styled()->child_at(0)->bounds().x());
+  EXPECT_EQ(3, styled()->child_at(0)->bounds().y());
+  EXPECT_EQ(styled()->bounds().height() - 3,
+            styled()->child_at(1)->bounds().bottom());
+}
+
+TEST_F(StyledLabelTest, CreateLinks) {
+  const std::string text("This is a test block of text.");
+  InitStyledLabel(text);
+  styled()->AddLink(ui::Range(0, 1));
+  styled()->AddLink(ui::Range(1, 2));
+  styled()->AddLink(ui::Range(10, 11));
+  styled()->AddLink(ui::Range(12, 13));
+
+  styled()->SetBounds(0, 0, 1000, 1000);
+  styled()->Layout();
+  ASSERT_EQ(7, styled()->child_count());
+}
+
+TEST_F(StyledLabelTest, DontBreakLinks) {
+  const std::string text("This is a test block of text, ");
+  const std::string link_text("and this should be a link");
+  InitStyledLabel(text + link_text);
+  styled()->AddLink(ui::Range(text.size(), text.size() + link_text.size()));
+
+  Label label(ASCIIToUTF16(text + link_text.substr(0, link_text.size() / 2)));
+  gfx::Size label_preferred_size = label.GetPreferredSize();
+  int pref_height = styled()->GetHeightForWidth(label_preferred_size.width());
+  EXPECT_EQ(label_preferred_size.height() * 2,
+            pref_height - styled()->GetInsets().height());
+
+  styled()->SetBounds(0, 0, label_preferred_size.width(), pref_height);
+  styled()->Layout();
+  ASSERT_EQ(2, styled()->child_count());
+  EXPECT_EQ(0, styled()->child_at(0)->bounds().x());
+  EXPECT_EQ(0, styled()->child_at(1)->bounds().x());
+}
+
+TEST_F(StyledLabelTest, HandleEmptyLayout) {
+  const std::string text("This is a test block of text, ");
+  InitStyledLabel(text);
+  styled()->Layout();
+  ASSERT_EQ(0, styled()->child_count());
+}
+
+}  // namespace