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label_unittest.cc
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label_unittest.cc
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// Copyright (c) 2012 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 "ui/views/controls/label.h"
#include <stddef.h>
#include <string>
#include <utility>
#include <vector>
#include "base/bind.h"
#include "base/command_line.h"
#include "base/i18n/rtl.h"
#include "base/test/gtest_util.h"
#include "build/build_config.h"
#include "build/chromeos_buildflags.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/accessibility/ax_enums.mojom.h"
#include "ui/accessibility/ax_node_data.h"
#include "ui/base/clipboard/clipboard.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/ui_base_switches.h"
#include "ui/compositor/canvas_painter.h"
#include "ui/compositor/layer.h"
#include "ui/events/base_event_utils.h"
#include "ui/events/test/event_generator.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/render_text.h"
#include "ui/gfx/text_constants.h"
#include "ui/gfx/text_elider.h"
#include "ui/strings/grit/ui_strings.h"
#include "ui/views/background.h"
#include "ui/views/border.h"
#include "ui/views/controls/base_control_test_widget.h"
#include "ui/views/controls/link.h"
#include "ui/views/style/typography.h"
#include "ui/views/test/ax_event_counter.h"
#include "ui/views/test/focus_manager_test.h"
#include "ui/views/test/view_metadata_test_utils.h"
#include "ui/views/test/views_test_base.h"
#include "ui/views/widget/unique_widget_ptr.h"
#include "ui/views/widget/widget.h"
#include "ui/views/widget/widget_utils.h"
using base::WideToUTF16;
namespace views {
namespace {
#if defined(OS_MAC)
const int kControlCommandModifier = ui::EF_COMMAND_DOWN;
#else
const int kControlCommandModifier = ui::EF_CONTROL_DOWN;
#endif
// All text sizing measurements (width and height) should be greater than this.
const int kMinTextDimension = 4;
class TestLabel : public Label {
public:
TestLabel() : Label(u"TestLabel") { SizeToPreferredSize(); }
TestLabel(const TestLabel&) = delete;
TestLabel& operator=(const TestLabel&) = delete;
int schedule_paint_count() const { return schedule_paint_count_; }
void SimulatePaint() {
SkBitmap bitmap;
SkColor color = SK_ColorTRANSPARENT;
Paint(PaintInfo::CreateRootPaintInfo(
ui::CanvasPainter(&bitmap, bounds().size(), 1.f, color, false)
.context(),
bounds().size()));
}
// View:
void OnDidSchedulePaint(const gfx::Rect& r) override {
++schedule_paint_count_;
Label::OnDidSchedulePaint(r);
}
private:
int schedule_paint_count_ = 0;
};
// A test utility function to set the application default text direction.
void SetRTL(bool rtl) {
// Override the current locale/direction.
base::i18n::SetICUDefaultLocale(rtl ? "he" : "en");
EXPECT_EQ(rtl, base::i18n::IsRTL());
}
std::u16string GetClipboardText(ui::ClipboardBuffer clipboard_buffer) {
std::u16string clipboard_text;
ui::Clipboard::GetForCurrentThread()->ReadText(
clipboard_buffer, /* data_dst = */ nullptr, &clipboard_text);
return clipboard_text;
}
// Makes an RTL string by mapping 0..6 to [א,ב,ג,ד,ה,ו,ז].
std::u16string ToRTL(const char* ascii) {
std::u16string rtl;
for (const char* c = ascii; *c; ++c) {
if (*c >= '0' && *c <= '6')
rtl += L'\x5d0' + (*c - '0');
else
rtl += static_cast<std::u16string::value_type>(*c);
}
return rtl;
}
} // namespace
class LabelTest : public test::BaseControlTestWidget {
public:
LabelTest() = default;
LabelTest(const LabelTest&) = delete;
LabelTest& operator=(const LabelTest&) = delete;
~LabelTest() override = default;
protected:
void CreateWidgetContent(View* container) override {
label_ = container->AddChildView(std::make_unique<Label>());
}
Label* label() { return label_; }
private:
Label* label_ = nullptr;
};
// Test fixture for text selection related tests.
class LabelSelectionTest : public LabelTest {
public:
// Alias this long identifier for more readable tests.
static constexpr bool kExtends =
gfx::RenderText::kDragToEndIfOutsideVerticalBounds;
// Some tests use cardinal directions to index an array of points above and
// below the label in either visual direction.
enum { NW, NORTH, NE, SE, SOUTH, SW };
LabelSelectionTest() = default;
LabelSelectionTest(const LabelSelectionTest&) = delete;
LabelSelectionTest& operator=(const LabelSelectionTest&) = delete;
// LabelTest overrides:
void SetUp() override {
LabelTest::SetUp();
event_generator_ =
std::make_unique<ui::test::EventGenerator>(GetRootWindow(widget()));
}
protected:
View* GetFocusedView() {
return widget()->GetFocusManager()->GetFocusedView();
}
void PerformMousePress(const gfx::Point& point) {
ui::MouseEvent pressed_event = ui::MouseEvent(
ui::ET_MOUSE_PRESSED, point, point, ui::EventTimeForNow(),
ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON);
label()->OnMousePressed(pressed_event);
}
void PerformMouseRelease(const gfx::Point& point) {
ui::MouseEvent released_event = ui::MouseEvent(
ui::ET_MOUSE_RELEASED, point, point, ui::EventTimeForNow(),
ui::EF_LEFT_MOUSE_BUTTON, ui::EF_LEFT_MOUSE_BUTTON);
label()->OnMouseReleased(released_event);
}
void PerformClick(const gfx::Point& point) {
PerformMousePress(point);
PerformMouseRelease(point);
}
void PerformMouseDragTo(const gfx::Point& point) {
ui::MouseEvent drag(ui::ET_MOUSE_DRAGGED, point, point,
ui::EventTimeForNow(), ui::EF_LEFT_MOUSE_BUTTON, 0);
label()->OnMouseDragged(drag);
}
// Used to force layout on the underlying RenderText instance.
void SimulatePaint() {
gfx::Canvas canvas;
label()->OnPaint(&canvas);
}
gfx::Point GetCursorPoint(uint32_t index) {
SimulatePaint();
gfx::RenderText* render_text =
label()->GetRenderTextForSelectionController();
// For single-line text, use the glyph bounds since it gives a better
// representation of the midpoint between glyphs when considering selection.
// TODO(crbug.com/248597): Add multiline support to GetCursorBounds(...).
if (!render_text->multiline()) {
return render_text
->GetCursorBounds(gfx::SelectionModel(index, gfx::CURSOR_FORWARD),
true)
.left_center();
}
// Otherwise, GetCursorBounds() will give incorrect results. Multiline
// editing is not supported (http://crbug.com/248597) so there hasn't been
// a need to draw a cursor. Instead, derive a point from the selection
// bounds, which always rounds up to an integer after the end of a glyph.
// This rounding differs to the glyph bounds, which rounds to nearest
// integer. See http://crbug.com/735346.
auto bounds = render_text->GetSubstringBounds({index, index + 1});
DCHECK_EQ(1u, bounds.size());
const bool rtl =
render_text->GetDisplayTextDirection() == base::i18n::RIGHT_TO_LEFT;
// Return Point corresponding to the leading edge of the character.
return rtl ? bounds[0].right_center() + gfx::Vector2d(-1, 0)
: bounds[0].left_center() + gfx::Vector2d(1, 0);
}
size_t GetLineCount() {
SimulatePaint();
return label()->GetRenderTextForSelectionController()->GetNumLines();
}
std::u16string GetSelectedText() { return label()->GetSelectedText(); }
ui::test::EventGenerator* event_generator() { return event_generator_.get(); }
bool IsMenuCommandEnabled(int command_id) {
return label()->IsCommandIdEnabled(command_id);
}
private:
std::unique_ptr<ui::test::EventGenerator> event_generator_;
};
TEST_F(LabelTest, Metadata) {
// Calling SetMultiLine() will DCHECK unless the label is in multi-line mode.
label()->SetMultiLine(true);
test::TestViewMetadata(label());
}
TEST_F(LabelTest, FontPropertySymbol) {
#if defined(OS_LINUX) || defined(OS_CHROMEOS)
// On linux, the fonts are mocked with a custom FontConfig. The "Courier New"
// family name is mapped to Cousine-Regular.ttf (see: $build/test_fonts/*).
std::string font_name("Courier New");
#else
std::string font_name("symbol");
#endif
gfx::Font font(font_name, 26);
label()->SetFontList(gfx::FontList(font));
gfx::Font font_used = label()->font_list().GetPrimaryFont();
EXPECT_EQ(font_name, font_used.GetFontName());
EXPECT_EQ(26, font_used.GetFontSize());
}
TEST_F(LabelTest, FontPropertyArial) {
std::string font_name("arial");
gfx::Font font(font_name, 30);
label()->SetFontList(gfx::FontList(font));
gfx::Font font_used = label()->font_list().GetPrimaryFont();
EXPECT_EQ(font_name, font_used.GetFontName());
EXPECT_EQ(30, font_used.GetFontSize());
}
TEST_F(LabelTest, TextProperty) {
std::u16string test_text(u"A random string.");
label()->SetText(test_text);
EXPECT_EQ(test_text, label()->GetText());
}
TEST_F(LabelTest, TextStyleProperty) {
label()->SetTextStyle(views::style::STYLE_DISABLED);
EXPECT_EQ(views::style::STYLE_DISABLED, label()->GetTextStyle());
}
TEST_F(LabelTest, ColorProperty) {
SkColor color = SkColorSetARGB(20, 40, 10, 5);
label()->SetAutoColorReadabilityEnabled(false);
label()->SetEnabledColor(color);
EXPECT_EQ(color, label()->GetEnabledColor());
}
TEST_F(LabelTest, AlignmentProperty) {
const bool was_rtl = base::i18n::IsRTL();
for (size_t i = 0; i < 2; ++i) {
// Toggle the application default text direction (to try each direction).
SetRTL(!base::i18n::IsRTL());
bool reverse_alignment = base::i18n::IsRTL();
// The alignment should be flipped in RTL UI.
label()->SetHorizontalAlignment(gfx::ALIGN_RIGHT);
EXPECT_EQ(reverse_alignment ? gfx::ALIGN_LEFT : gfx::ALIGN_RIGHT,
label()->GetHorizontalAlignment());
label()->SetHorizontalAlignment(gfx::ALIGN_LEFT);
EXPECT_EQ(reverse_alignment ? gfx::ALIGN_RIGHT : gfx::ALIGN_LEFT,
label()->GetHorizontalAlignment());
label()->SetHorizontalAlignment(gfx::ALIGN_CENTER);
EXPECT_EQ(gfx::ALIGN_CENTER, label()->GetHorizontalAlignment());
for (size_t j = 0; j < 2; ++j) {
label()->SetHorizontalAlignment(gfx::ALIGN_TO_HEAD);
const bool rtl = j == 0;
label()->SetText(rtl ? u"\x5d0" : u"A");
EXPECT_EQ(gfx::ALIGN_TO_HEAD, label()->GetHorizontalAlignment());
}
}
EXPECT_EQ(was_rtl, base::i18n::IsRTL());
}
TEST_F(LabelTest, MinimumSizeRespectsLineHeight) {
std::u16string text(u"This is example text.");
label()->SetText(text);
const gfx::Size minimum_size = label()->GetMinimumSize();
const int expected_height = minimum_size.height() + 10;
label()->SetLineHeight(expected_height);
EXPECT_EQ(expected_height, label()->GetMinimumSize().height());
}
TEST_F(LabelTest, MinimumSizeRespectsLineHeightMultiline) {
std::u16string text(u"This is example text.");
label()->SetText(text);
label()->SetMultiLine(true);
const gfx::Size minimum_size = label()->GetMinimumSize();
const int expected_height = minimum_size.height() + 10;
label()->SetLineHeight(expected_height);
EXPECT_EQ(expected_height, label()->GetMinimumSize().height());
}
TEST_F(LabelTest, MinimumSizeRespectsLineHeightWithInsets) {
std::u16string text(u"This is example text.");
label()->SetText(text);
const gfx::Size minimum_size = label()->GetMinimumSize();
int expected_height = minimum_size.height() + 10;
label()->SetLineHeight(expected_height);
constexpr gfx::Insets kInsets{2, 3, 4, 5};
expected_height += kInsets.height();
label()->SetBorder(CreateEmptyBorder(kInsets));
EXPECT_EQ(expected_height, label()->GetMinimumSize().height());
}
TEST_F(LabelTest, MinimumSizeRespectsLineHeightMultilineWithInsets) {
std::u16string text(u"This is example text.");
label()->SetText(text);
label()->SetMultiLine(true);
const gfx::Size minimum_size = label()->GetMinimumSize();
int expected_height = minimum_size.height() + 10;
label()->SetLineHeight(expected_height);
constexpr gfx::Insets kInsets{2, 3, 4, 5};
expected_height += kInsets.height();
label()->SetBorder(CreateEmptyBorder(kInsets));
EXPECT_EQ(expected_height, label()->GetMinimumSize().height());
}
TEST_F(LabelTest, ElideBehavior) {
std::u16string text(u"This is example text.");
label()->SetText(text);
EXPECT_EQ(gfx::ELIDE_TAIL, label()->GetElideBehavior());
gfx::Size size = label()->GetPreferredSize();
label()->SetBoundsRect(gfx::Rect(size));
EXPECT_EQ(text, label()->GetDisplayTextForTesting());
size.set_width(size.width() / 2);
label()->SetBoundsRect(gfx::Rect(size));
EXPECT_GT(text.size(), label()->GetDisplayTextForTesting().size());
label()->SetElideBehavior(gfx::NO_ELIDE);
EXPECT_EQ(text, label()->GetDisplayTextForTesting());
}
// Test the minimum width of a Label is correct depending on its ElideBehavior,
// including |gfx::NO_ELIDE|.
TEST_F(LabelTest, ElideBehaviorMinimumWidth) {
std::u16string text(u"This is example text.");
label()->SetText(text);
// Default should be |gfx::ELIDE_TAIL|.
EXPECT_EQ(gfx::ELIDE_TAIL, label()->GetElideBehavior());
gfx::Size size = label()->GetMinimumSize();
// Elidable labels have a minimum width that fits |gfx::kEllipsisUTF16|.
EXPECT_EQ(gfx::Canvas::GetStringWidth(std::u16string(gfx::kEllipsisUTF16),
label()->font_list()),
size.width());
label()->SetSize(label()->GetMinimumSize());
EXPECT_GT(text.length(), label()->GetDisplayTextForTesting().length());
// Truncated labels can take up the size they are given, but not exceed that
// if the text can't fit.
label()->SetElideBehavior(gfx::TRUNCATE);
label()->SetSize(gfx::Size(10, 10));
size = label()->GetMinimumSize();
EXPECT_LT(size.width(), label()->size().width());
EXPECT_GT(text.length(), label()->GetDisplayTextForTesting().length());
// Non-elidable single-line labels should take up their full text size, since
// this behavior implies the text should not be cut off.
EXPECT_FALSE(label()->GetMultiLine());
label()->SetElideBehavior(gfx::NO_ELIDE);
size = label()->GetMinimumSize();
EXPECT_EQ(text.length(), label()->GetDisplayTextForTesting().length());
label()->SetSize(label()->GetMinimumSize());
EXPECT_EQ(text, label()->GetDisplayTextForTesting());
}
TEST_F(LabelTest, MultiLineProperty) {
EXPECT_FALSE(label()->GetMultiLine());
label()->SetMultiLine(true);
EXPECT_TRUE(label()->GetMultiLine());
label()->SetMultiLine(false);
EXPECT_FALSE(label()->GetMultiLine());
}
TEST_F(LabelTest, ObscuredProperty) {
std::u16string test_text(u"Password!");
label()->SetText(test_text);
label()->SizeToPreferredSize();
// The text should be unobscured by default.
EXPECT_FALSE(label()->GetObscured());
EXPECT_EQ(test_text, label()->GetDisplayTextForTesting());
EXPECT_EQ(test_text, label()->GetText());
label()->SetObscured(true);
label()->SizeToPreferredSize();
EXPECT_TRUE(label()->GetObscured());
EXPECT_EQ(std::u16string(test_text.size(),
gfx::RenderText::kPasswordReplacementChar),
label()->GetDisplayTextForTesting());
EXPECT_EQ(test_text, label()->GetText());
label()->SetText(test_text + test_text);
label()->SizeToPreferredSize();
EXPECT_EQ(std::u16string(test_text.size() * 2,
gfx::RenderText::kPasswordReplacementChar),
label()->GetDisplayTextForTesting());
EXPECT_EQ(test_text + test_text, label()->GetText());
label()->SetObscured(false);
label()->SizeToPreferredSize();
EXPECT_FALSE(label()->GetObscured());
EXPECT_EQ(test_text + test_text, label()->GetDisplayTextForTesting());
EXPECT_EQ(test_text + test_text, label()->GetText());
}
TEST_F(LabelTest, ObscuredSurrogatePair) {
// 'MUSICAL SYMBOL G CLEF': represented in UTF-16 as two characters
// forming the surrogate pair 0x0001D11E.
const std::u16string kTestText = u"𝄞";
label()->SetText(kTestText);
label()->SetObscured(true);
label()->SizeToPreferredSize();
EXPECT_EQ(std::u16string(1, gfx::RenderText::kPasswordReplacementChar),
label()->GetDisplayTextForTesting());
EXPECT_EQ(kTestText, label()->GetText());
}
// This test case verifies the label preferred size will change based on the
// current layout, which may seem wrong. However many of our code base assumes
// this behavior, therefore this behavior will have to be kept until the code
// with this assumption is fixed. See http://crbug.com/468494 and
// http://crbug.com/467526.
// TODO(mukai): fix the code assuming this behavior and then fix Label
// implementation, and remove this test case.
TEST_F(LabelTest, MultilinePreferredSizeTest) {
label()->SetText(u"This is an example.");
gfx::Size single_line_size = label()->GetPreferredSize();
label()->SetMultiLine(true);
gfx::Size multi_line_size = label()->GetPreferredSize();
EXPECT_EQ(single_line_size, multi_line_size);
int new_width = multi_line_size.width() / 2;
label()->SetBounds(0, 0, new_width, label()->GetHeightForWidth(new_width));
gfx::Size new_size = label()->GetPreferredSize();
EXPECT_GT(multi_line_size.width(), new_size.width());
EXPECT_LT(multi_line_size.height(), new_size.height());
}
TEST_F(LabelTest, SingleLineGetHeightForWidth) {
// Even an empty label should take one line worth of height.
const int line_height = label()->GetLineHeight();
EXPECT_EQ(line_height, label()->GetHeightForWidth(100));
// Given any amount of width, the label should take one line.
label()->SetText(u"This is an example.");
const int width = label()->GetPreferredSize().width();
EXPECT_EQ(line_height, label()->GetHeightForWidth(width));
EXPECT_EQ(line_height, label()->GetHeightForWidth(width * 2));
EXPECT_EQ(line_height, label()->GetHeightForWidth(width / 2));
EXPECT_EQ(line_height, label()->GetHeightForWidth(0));
}
TEST_F(LabelTest, MultiLineGetHeightForWidth) {
// Even an empty label should take one line worth of height.
label()->SetMultiLine(true);
const int line_height = label()->GetLineHeight();
EXPECT_EQ(line_height, label()->GetHeightForWidth(100));
// Given its preferred width or more, the label should take one line.
label()->SetText(u"This is an example.");
const int width = label()->GetPreferredSize().width();
EXPECT_EQ(line_height, label()->GetHeightForWidth(width));
EXPECT_EQ(line_height, label()->GetHeightForWidth(width * 2));
// Given too little width, the required number of lines should increase.
// Linebreaking will affect this, so sanity-checks are sufficient.
const int height_for_half_width = label()->GetHeightForWidth(width / 2);
EXPECT_GT(height_for_half_width, line_height);
EXPECT_GT(label()->GetHeightForWidth(width / 4), height_for_half_width);
// Given zero width, the label should take GetMaxLines(); if this is not set,
// default to one.
EXPECT_EQ(line_height, label()->GetHeightForWidth(0));
label()->SetMaxLines(10);
EXPECT_EQ(line_height * 10, label()->GetHeightForWidth(0));
}
TEST_F(LabelTest, TooltipProperty) {
label()->SetText(u"My cool string.");
// Initially, label has no bounds, its text does not fit, and therefore its
// text should be returned as the tooltip text.
EXPECT_EQ(label()->GetText(), label()->GetTooltipText(gfx::Point()));
// While tooltip handling is disabled, GetTooltipText() should fail.
label()->SetHandlesTooltips(false);
EXPECT_TRUE(label()->GetTooltipText(gfx::Point()).empty());
label()->SetHandlesTooltips(true);
// When set, custom tooltip text should be returned instead of the label's
// text.
std::u16string tooltip_text(u"The tooltip!");
label()->SetTooltipText(tooltip_text);
EXPECT_EQ(tooltip_text, label()->GetTooltipText(gfx::Point()));
// While tooltip handling is disabled, GetTooltipText() should fail.
label()->SetHandlesTooltips(false);
EXPECT_TRUE(label()->GetTooltipText(gfx::Point()).empty());
label()->SetHandlesTooltips(true);
// When the tooltip text is set to an empty string, the original behavior is
// restored.
label()->SetTooltipText(std::u16string());
EXPECT_EQ(label()->GetText(), label()->GetTooltipText(gfx::Point()));
// While tooltip handling is disabled, GetTooltipText() should fail.
label()->SetHandlesTooltips(false);
EXPECT_TRUE(label()->GetTooltipText(gfx::Point()).empty());
label()->SetHandlesTooltips(true);
// Make the label big enough to hold the text
// and expect there to be no tooltip.
label()->SetBounds(0, 0, 1000, 40);
EXPECT_TRUE(label()->GetTooltipText(gfx::Point()).empty());
// Shrinking the single-line label's height shouldn't trigger a tooltip.
label()->SetBounds(0, 0, 1000, label()->GetPreferredSize().height() / 2);
EXPECT_TRUE(label()->GetTooltipText(gfx::Point()).empty());
// Verify that explicitly set tooltip text is shown, regardless of size.
label()->SetTooltipText(tooltip_text);
EXPECT_EQ(tooltip_text, label()->GetTooltipText(gfx::Point()));
// Clear out the explicitly set tooltip text.
label()->SetTooltipText(std::u16string());
// Shrink the bounds and the tooltip should come back.
label()->SetBounds(0, 0, 10, 10);
EXPECT_FALSE(label()->GetTooltipText(gfx::Point()).empty());
// Make the label obscured and there is no tooltip.
label()->SetObscured(true);
EXPECT_TRUE(label()->GetTooltipText(gfx::Point()).empty());
// Obscuring the text shouldn't permanently clobber the tooltip.
label()->SetObscured(false);
EXPECT_FALSE(label()->GetTooltipText(gfx::Point()).empty());
// Making the label multiline shouldn't eliminate the tooltip.
label()->SetMultiLine(true);
EXPECT_FALSE(label()->GetTooltipText(gfx::Point()).empty());
// Expanding the multiline label bounds should eliminate the tooltip.
label()->SetBounds(0, 0, 1000, 1000);
EXPECT_TRUE(label()->GetTooltipText(gfx::Point()).empty());
// Verify that setting the tooltip still shows it.
label()->SetTooltipText(tooltip_text);
EXPECT_EQ(tooltip_text, label()->GetTooltipText(gfx::Point()));
// Clear out the tooltip.
label()->SetTooltipText(std::u16string());
}
TEST_F(LabelTest, Accessibility) {
const std::u16string accessible_name = u"A11y text.";
label()->SetText(u"Displayed text.");
ui::AXNodeData node_data;
label()->GetAccessibleNodeData(&node_data);
EXPECT_EQ(ax::mojom::Role::kStaticText, node_data.role);
EXPECT_EQ(label()->GetText(),
node_data.GetString16Attribute(ax::mojom::StringAttribute::kName));
EXPECT_FALSE(
node_data.HasIntAttribute(ax::mojom::IntAttribute::kRestriction));
// Setting a custom accessible name overrides the displayed text in
// screen reader announcements.
label()->SetAccessibleName(accessible_name);
label()->GetAccessibleNodeData(&node_data);
EXPECT_EQ(accessible_name,
node_data.GetString16Attribute(ax::mojom::StringAttribute::kName));
EXPECT_NE(label()->GetText(),
node_data.GetString16Attribute(ax::mojom::StringAttribute::kName));
// Changing the displayed text will not impact the non-empty accessible name.
label()->SetText(u"Different displayed Text.");
label()->GetAccessibleNodeData(&node_data);
EXPECT_EQ(accessible_name,
node_data.GetString16Attribute(ax::mojom::StringAttribute::kName));
EXPECT_NE(label()->GetText(),
node_data.GetString16Attribute(ax::mojom::StringAttribute::kName));
// Clearing the accessible name will cause the screen reader to default to
// verbalizing the displayed text.
label()->SetAccessibleName(u"");
label()->GetAccessibleNodeData(&node_data);
EXPECT_EQ(label()->GetText(),
node_data.GetString16Attribute(ax::mojom::StringAttribute::kName));
}
TEST_F(LabelTest, SetTextNotifiesAccessibilityEvent) {
test::AXEventCounter counter(views::AXEventManager::Get());
// Changing the text affects the accessible name, so it should notify.
EXPECT_EQ(0, counter.GetCount(ax::mojom::Event::kTextChanged));
label()->SetText(u"Example");
EXPECT_EQ(u"Example", label()->GetAccessibleName());
EXPECT_EQ(1, counter.GetCount(ax::mojom::Event::kTextChanged));
// Changing the text when it doesn't affect the accessible name should not
// notify.
label()->SetAccessibleName(u"Name");
EXPECT_EQ(2, counter.GetCount(ax::mojom::Event::kTextChanged));
label()->SetText(u"Example2");
EXPECT_EQ(u"Name", label()->GetAccessibleName());
EXPECT_EQ(2, counter.GetCount(ax::mojom::Event::kTextChanged));
}
TEST_F(LabelTest, TextChangeWithoutLayout) {
label()->SetText(u"Example");
label()->SetBounds(0, 0, 200, 200);
gfx::Canvas canvas(gfx::Size(200, 200), 1.0f, true);
label()->OnPaint(&canvas);
EXPECT_TRUE(label()->display_text_);
EXPECT_EQ(u"Example", label()->display_text_->GetDisplayText());
label()->SetText(u"Altered");
// The altered text should be painted even though Layout() or SetBounds() are
// not called.
label()->OnPaint(&canvas);
EXPECT_TRUE(label()->display_text_);
EXPECT_EQ(u"Altered", label()->display_text_->GetDisplayText());
}
TEST_F(LabelTest, EmptyLabelSizing) {
const gfx::Size expected_size(0, label()->font_list().GetHeight());
EXPECT_EQ(expected_size, label()->GetPreferredSize());
label()->SetMultiLine(!label()->GetMultiLine());
EXPECT_EQ(expected_size, label()->GetPreferredSize());
}
TEST_F(LabelTest, SingleLineSizing) {
label()->SetText(u"A not so random string in one line.");
const gfx::Size size = label()->GetPreferredSize();
EXPECT_GT(size.height(), kMinTextDimension);
EXPECT_GT(size.width(), kMinTextDimension);
// Setting a size smaller than preferred should not change the preferred size.
label()->SetSize(gfx::Size(size.width() / 2, size.height() / 2));
EXPECT_EQ(size, label()->GetPreferredSize());
const gfx::Insets border(10, 20, 30, 40);
label()->SetBorder(CreateEmptyBorder(border));
const gfx::Size size_with_border = label()->GetPreferredSize();
EXPECT_EQ(size_with_border.height(), size.height() + border.height());
EXPECT_EQ(size_with_border.width(), size.width() + border.width());
EXPECT_EQ(size.height() + border.height(),
label()->GetHeightForWidth(size_with_border.width()));
}
TEST_F(LabelTest, MultilineSmallAvailableWidthSizing) {
label()->SetMultiLine(true);
label()->SetAllowCharacterBreak(true);
label()->SetText(u"Too Wide.");
// Check that Label can be laid out at a variety of small sizes,
// splitting the words into up to one character per line if necessary.
// Incorrect word splitting may cause infinite loops in text layout.
gfx::Size required_size = label()->GetPreferredSize();
for (int i = 1; i < required_size.width(); ++i)
EXPECT_GT(label()->GetHeightForWidth(i), 0);
}
// Verifies if SetAllowCharacterBreak(true) doesn't change the preferred size.
// See crbug.com/469559
TEST_F(LabelTest, PreferredSizeForAllowCharacterBreak) {
label()->SetText(u"Example");
gfx::Size preferred_size = label()->GetPreferredSize();
label()->SetMultiLine(true);
label()->SetAllowCharacterBreak(true);
EXPECT_EQ(preferred_size, label()->GetPreferredSize());
}
TEST_F(LabelTest, MultiLineSizing) {
label()->SetText(u"A random string\nwith multiple lines\nand returns!");
label()->SetMultiLine(true);
// GetPreferredSize
gfx::Size required_size = label()->GetPreferredSize();
EXPECT_GT(required_size.height(), kMinTextDimension);
EXPECT_GT(required_size.width(), kMinTextDimension);
// SizeToFit with unlimited width.
label()->SizeToFit(0);
int required_width = label()->GetLocalBounds().width();
EXPECT_GT(required_width, kMinTextDimension);
// SizeToFit with limited width.
label()->SizeToFit(required_width - 1);
int constrained_width = label()->GetLocalBounds().width();
#if defined(OS_WIN)
// Canvas::SizeStringInt (in ui/gfx/canvas_linux.cc)
// has to be fixed to return the size that fits to given width/height.
EXPECT_LT(constrained_width, required_width);
#endif
EXPECT_GT(constrained_width, kMinTextDimension);
// Change the width back to the desire width.
label()->SizeToFit(required_width);
EXPECT_EQ(required_width, label()->GetLocalBounds().width());
// General tests for GetHeightForWidth.
int required_height = label()->GetHeightForWidth(required_width);
EXPECT_GT(required_height, kMinTextDimension);
int height_for_constrained_width =
label()->GetHeightForWidth(constrained_width);
#if defined(OS_WIN)
// Canvas::SizeStringInt (in ui/gfx/canvas_linux.cc)
// has to be fixed to return the size that fits to given width/height.
EXPECT_GT(height_for_constrained_width, required_height);
#endif
// Using the constrained width or the required_width - 1 should give the
// same result for the height because the constrainted width is the tight
// width when given "required_width - 1" as the max width.
EXPECT_EQ(height_for_constrained_width,
label()->GetHeightForWidth(required_width - 1));
// Test everything with borders.
gfx::Insets border(10, 20, 30, 40);
label()->SetBorder(CreateEmptyBorder(border));
// SizeToFit and borders.
label()->SizeToFit(0);
int required_width_with_border = label()->GetLocalBounds().width();
EXPECT_EQ(required_width_with_border, required_width + border.width());
// GetHeightForWidth and borders.
int required_height_with_border =
label()->GetHeightForWidth(required_width_with_border);
EXPECT_EQ(required_height_with_border, required_height + border.height());
// Test that the border width is subtracted before doing the height
// calculation. If it is, then the height will grow when width
// is shrunk.
int height1 = label()->GetHeightForWidth(required_width_with_border - 1);
#if defined(OS_WIN)
// Canvas::SizeStringInt (in ui/gfx/canvas_linux.cc)
// has to be fixed to return the size that fits to given width/height.
EXPECT_GT(height1, required_height_with_border);
#endif
EXPECT_EQ(height1, height_for_constrained_width + border.height());
// GetPreferredSize and borders.
label()->SetBounds(0, 0, 0, 0);
gfx::Size required_size_with_border = label()->GetPreferredSize();
EXPECT_EQ(required_size_with_border.height(),
required_size.height() + border.height());
EXPECT_EQ(required_size_with_border.width(),
required_size.width() + border.width());
}
#if !defined(OS_MAC)
// TODO(warx): Remove !defined(OS_MAC) once SetMaxLines() is applied to MAC
// (crbug.com/758720).
TEST_F(LabelTest, MultiLineSetMaxLines) {
// Ensure SetMaxLines clamps the line count of a string with returns.
label()->SetText(u"first line\nsecond line\nthird line");
label()->SetMultiLine(true);
gfx::Size string_size = label()->GetPreferredSize();
label()->SetMaxLines(2);
gfx::Size two_line_size = label()->GetPreferredSize();
EXPECT_EQ(string_size.width(), two_line_size.width());
EXPECT_GT(string_size.height(), two_line_size.height());
// Ensure GetHeightForWidth also respects SetMaxLines.
int height = label()->GetHeightForWidth(string_size.width() / 2);
EXPECT_EQ(height, two_line_size.height());
// Ensure SetMaxLines also works with line wrapping for SizeToFit.
label()->SetText(u"A long string that will be wrapped");
label()->SetMaxLines(0); // Used to get the uncapped height.
label()->SizeToFit(0); // Used to get the uncapped width.
label()->SizeToFit(label()->GetPreferredSize().width() / 4);
string_size = label()->GetPreferredSize();
label()->SetMaxLines(2);
two_line_size = label()->GetPreferredSize();
EXPECT_EQ(string_size.width(), two_line_size.width());
EXPECT_GT(string_size.height(), two_line_size.height());
// Ensure SetMaxLines also works with line wrapping for SetMaximumWidth.
label()->SetMaxLines(0); // Used to get the uncapped height.
label()->SizeToFit(0); // Used to get the uncapped width.
label()->SetMaximumWidth(label()->GetPreferredSize().width() / 4);
string_size = label()->GetPreferredSize();
label()->SetMaxLines(2);
two_line_size = label()->GetPreferredSize();
EXPECT_EQ(string_size.width(), two_line_size.width());
EXPECT_GT(string_size.height(), two_line_size.height());
// Ensure SetMaxLines respects the requested inset height.
const gfx::Insets border(1, 2, 3, 4);
label()->SetBorder(CreateEmptyBorder(border));
EXPECT_EQ(two_line_size.height() + border.height(),
label()->GetPreferredSize().height());
}
#endif
// Verifies if the combination of text eliding and multiline doesn't cause
// any side effects of size / layout calculation.
TEST_F(LabelTest, MultiLineSizingWithElide) {
const std::u16string text =
u"A random string\nwith multiple lines\nand returns!";
label()->SetText(text);
label()->SetMultiLine(true);
gfx::Size required_size = label()->GetPreferredSize();
EXPECT_GT(required_size.height(), kMinTextDimension);
EXPECT_GT(required_size.width(), kMinTextDimension);
label()->SetBoundsRect(gfx::Rect(required_size));
label()->SetElideBehavior(gfx::ELIDE_TAIL);
EXPECT_EQ(required_size, label()->GetPreferredSize());
EXPECT_EQ(text, label()->GetDisplayTextForTesting());
label()->SizeToFit(required_size.width() - 1);
gfx::Size narrow_size = label()->GetPreferredSize();
EXPECT_GT(required_size.width(), narrow_size.width());
EXPECT_LT(required_size.height(), narrow_size.height());
// SetBounds() doesn't change the preferred size.
label()->SetBounds(0, 0, narrow_size.width() - 1, narrow_size.height());
EXPECT_EQ(narrow_size, label()->GetPreferredSize());
// Paint() doesn't change the preferred size.
gfx::Canvas canvas;
label()->OnPaint(&canvas);
EXPECT_EQ(narrow_size, label()->GetPreferredSize());
}
// Check that labels support GetTooltipHandlerForPoint.
TEST_F(LabelTest, GetTooltipHandlerForPoint) {
label()->SetText(u"A string that's long enough to exceed the bounds");
label()->SetBounds(0, 0, 10, 10);
// By default, labels start out as tooltip handlers.
ASSERT_TRUE(label()->GetHandlesTooltips());
// There's a default tooltip if the text is too big to fit.
EXPECT_EQ(label(), label()->GetTooltipHandlerForPoint(gfx::Point(2, 2)));
// If tooltip handling is disabled, the label should not provide a tooltip
// handler.
label()->SetHandlesTooltips(false);
EXPECT_FALSE(label()->GetTooltipHandlerForPoint(gfx::Point(2, 2)));
label()->SetHandlesTooltips(true);
// If there's no default tooltip, this should return NULL.
label()->SetBounds(0, 0, 500, 50);
EXPECT_FALSE(label()->GetTooltipHandlerForPoint(gfx::Point(2, 2)));
label()->SetTooltipText(u"a tooltip");
// If the point hits the label, and tooltip is set, the label should be
// returned as its tooltip handler.
EXPECT_EQ(label(), label()->GetTooltipHandlerForPoint(gfx::Point(2, 2)));
// Additionally, GetTooltipHandlerForPoint should verify that the label
// actually contains the point.
EXPECT_FALSE(label()->GetTooltipHandlerForPoint(gfx::Point(2, 51)));
EXPECT_FALSE(label()->GetTooltipHandlerForPoint(gfx::Point(-1, 20)));
// Again, if tooltip handling is disabled, the label should not provide a
// tooltip handler.
label()->SetHandlesTooltips(false);
EXPECT_FALSE(label()->GetTooltipHandlerForPoint(gfx::Point(2, 2)));
EXPECT_FALSE(label()->GetTooltipHandlerForPoint(gfx::Point(2, 51)));
EXPECT_FALSE(label()->GetTooltipHandlerForPoint(gfx::Point(-1, 20)));
label()->SetHandlesTooltips(true);
// GetTooltipHandlerForPoint works should work in child bounds.
label()->SetBounds(2, 2, 10, 10);
EXPECT_EQ(label(), label()->GetTooltipHandlerForPoint(gfx::Point(1, 5)));
EXPECT_FALSE(label()->GetTooltipHandlerForPoint(gfx::Point(3, 11)));
}
// Check that label releases its internal layout data when it's unnecessary.
TEST_F(LabelTest, ResetRenderTextData) {
label()->SetText(u"Example");
label()->SizeToPreferredSize();
gfx::Size preferred_size = label()->GetPreferredSize();
EXPECT_NE(gfx::Size(), preferred_size);
EXPECT_FALSE(label()->display_text_);
gfx::Canvas canvas(preferred_size, 1.0f, true);
label()->OnPaint(&canvas);
EXPECT_TRUE(label()->display_text_);
// Label should recreate its RenderText object when it's invisible, to release
// the layout structures and data.
label()->SetVisible(false);
EXPECT_FALSE(label()->display_text_);
// Querying fields or size information should not recompute the layout
// unnecessarily.
EXPECT_EQ(u"Example", label()->GetText());
EXPECT_FALSE(label()->display_text_);
EXPECT_EQ(preferred_size, label()->GetPreferredSize());
EXPECT_FALSE(label()->display_text_);
// RenderText data should be back when it's necessary.
label()->SetVisible(true);
EXPECT_FALSE(label()->display_text_);
label()->OnPaint(&canvas);
EXPECT_TRUE(label()->display_text_);
// Changing layout just resets |display_text_|. It'll recover next time it's
// drawn.
label()->SetBounds(0, 0, 10, 10);
EXPECT_FALSE(label()->display_text_);
label()->OnPaint(&canvas);
EXPECT_TRUE(label()->display_text_);
}
TEST_F(LabelTest, MultilineSupportedRenderText) {
label()->SetText(u"Example of\nmultilined label");
label()->SetMultiLine(true);
label()->SizeToPreferredSize();
gfx::Canvas canvas(label()->GetPreferredSize(), 1.0f, true);
label()->OnPaint(&canvas);
// There's only RenderText instance, which should have multiple lines.
ASSERT_TRUE(label()->display_text_);
EXPECT_EQ(2u, label()->display_text_->GetNumLines());
}
// Ensures SchedulePaint() calls are not made in OnPaint().
TEST_F(LabelTest, NoSchedulePaintInOnPaint) {
TestLabel label;
int count = 0;
const auto expect_paint_count_increased = [&]() {
EXPECT_GT(label.schedule_paint_count(), count);
count = label.schedule_paint_count();
};
// Initialization should schedule at least one paint, but the precise number
// doesn't really matter.
expect_paint_count_increased();