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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/button/label_button.h"
#include "base/strings/utf_string_conversions.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/gfx/canvas.h"
#include "ui/gfx/font_list.h"
#include "ui/gfx/size.h"
#include "ui/gfx/text_utils.h"
#include "ui/views/test/views_test_base.h"
using base::ASCIIToUTF16;
namespace {
gfx::ImageSkia CreateTestImage(int width, int height) {
SkBitmap bitmap;
bitmap.setConfig(SkBitmap::kARGB_8888_Config, width, height);
bitmap.allocPixels();
return gfx::ImageSkia::CreateFrom1xBitmap(bitmap);
}
} // namespace
namespace views {
typedef ViewsTestBase LabelButtonTest;
TEST_F(LabelButtonTest, Init) {
const base::string16 text(ASCIIToUTF16("abc"));
LabelButton button(NULL, text);
EXPECT_TRUE(button.GetImage(Button::STATE_NORMAL).isNull());
EXPECT_TRUE(button.GetImage(Button::STATE_HOVERED).isNull());
EXPECT_TRUE(button.GetImage(Button::STATE_PRESSED).isNull());
EXPECT_TRUE(button.GetImage(Button::STATE_DISABLED).isNull());
EXPECT_EQ(text, button.GetText());
EXPECT_EQ(gfx::ALIGN_LEFT, button.GetHorizontalAlignment());
EXPECT_FALSE(button.is_default());
EXPECT_EQ(button.style(), Button::STYLE_TEXTBUTTON);
EXPECT_EQ(Button::STATE_NORMAL, button.state());
EXPECT_EQ(button.image_->parent(), &button);
EXPECT_EQ(button.label_->parent(), &button);
}
TEST_F(LabelButtonTest, Label) {
LabelButton button(NULL, base::string16());
EXPECT_TRUE(button.GetText().empty());
const gfx::FontList font_list;
const base::string16 short_text(ASCIIToUTF16("abcdefghijklm"));
const base::string16 long_text(ASCIIToUTF16("abcdefghijklmnopqrstuvwxyz"));
const int short_text_width = gfx::GetStringWidth(short_text, font_list);
const int long_text_width = gfx::GetStringWidth(long_text, font_list);
// The width increases monotonically with string size (it does not shrink).
EXPECT_LT(button.GetPreferredSize().width(), short_text_width);
button.SetText(short_text);
EXPECT_GT(button.GetPreferredSize().height(), font_list.GetHeight());
EXPECT_GT(button.GetPreferredSize().width(), short_text_width);
EXPECT_LT(button.GetPreferredSize().width(), long_text_width);
button.SetText(long_text);
EXPECT_GT(button.GetPreferredSize().width(), long_text_width);
button.SetText(short_text);
EXPECT_GT(button.GetPreferredSize().width(), long_text_width);
// Clamp the size to a maximum value.
button.set_max_size(gfx::Size(long_text_width, 1));
EXPECT_EQ(button.GetPreferredSize(), gfx::Size(long_text_width, 1));
// Clear the monotonically increasing minimum size.
button.set_min_size(gfx::Size());
EXPECT_GT(button.GetPreferredSize().width(), short_text_width);
EXPECT_LT(button.GetPreferredSize().width(), long_text_width);
}
TEST_F(LabelButtonTest, Image) {
LabelButton button(NULL, base::string16());
const int small_size = 50, large_size = 100;
const gfx::ImageSkia small_image = CreateTestImage(small_size, small_size);
const gfx::ImageSkia large_image = CreateTestImage(large_size, large_size);
// The width increases monotonically with image size (it does not shrink).
EXPECT_LT(button.GetPreferredSize().width(), small_size);
EXPECT_LT(button.GetPreferredSize().height(), small_size);
button.SetImage(Button::STATE_NORMAL, small_image);
EXPECT_GT(button.GetPreferredSize().width(), small_size);
EXPECT_GT(button.GetPreferredSize().height(), small_size);
EXPECT_LT(button.GetPreferredSize().width(), large_size);
EXPECT_LT(button.GetPreferredSize().height(), large_size);
button.SetImage(Button::STATE_NORMAL, large_image);
EXPECT_GT(button.GetPreferredSize().width(), large_size);
EXPECT_GT(button.GetPreferredSize().height(), large_size);
button.SetImage(Button::STATE_NORMAL, small_image);
EXPECT_GT(button.GetPreferredSize().width(), large_size);
EXPECT_GT(button.GetPreferredSize().height(), large_size);
// Clamp the size to a maximum value.
button.set_max_size(gfx::Size(large_size, 1));
EXPECT_EQ(button.GetPreferredSize(), gfx::Size(large_size, 1));
// Clear the monotonically increasing minimum size.
button.set_min_size(gfx::Size());
EXPECT_GT(button.GetPreferredSize().width(), small_size);
EXPECT_LT(button.GetPreferredSize().width(), large_size);
}
TEST_F(LabelButtonTest, LabelAndImage) {
LabelButton button(NULL, base::string16());
const gfx::FontList font_list;
const base::string16 text(ASCIIToUTF16("abcdefghijklm"));
const int text_width = gfx::GetStringWidth(text, font_list);
const int image_size = 50;
const gfx::ImageSkia image = CreateTestImage(image_size, image_size);
ASSERT_LT(font_list.GetHeight(), image_size);
// The width increases monotonically with content size (it does not shrink).
EXPECT_LT(button.GetPreferredSize().width(), text_width);
EXPECT_LT(button.GetPreferredSize().width(), image_size);
EXPECT_LT(button.GetPreferredSize().height(), image_size);
button.SetText(text);
EXPECT_GT(button.GetPreferredSize().width(), text_width);
EXPECT_GT(button.GetPreferredSize().height(), font_list.GetHeight());
EXPECT_LT(button.GetPreferredSize().width(), text_width + image_size);
EXPECT_LT(button.GetPreferredSize().height(), image_size);
button.SetImage(Button::STATE_NORMAL, image);
EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size);
EXPECT_GT(button.GetPreferredSize().height(), image_size);
// Layout and ensure the image is left of the label except for ALIGN_RIGHT.
// (A proper parent view or layout manager would Layout on its invalidations).
button.SetSize(button.GetPreferredSize());
button.Layout();
EXPECT_EQ(gfx::ALIGN_LEFT, button.GetHorizontalAlignment());
EXPECT_LT(button.image_->bounds().right(), button.label_->bounds().x());
button.SetHorizontalAlignment(gfx::ALIGN_CENTER);
button.Layout();
EXPECT_EQ(gfx::ALIGN_CENTER, button.GetHorizontalAlignment());
EXPECT_LT(button.image_->bounds().right(), button.label_->bounds().x());
button.SetHorizontalAlignment(gfx::ALIGN_RIGHT);
button.Layout();
EXPECT_EQ(gfx::ALIGN_RIGHT, button.GetHorizontalAlignment());
EXPECT_LT(button.label_->bounds().right(), button.image_->bounds().x());
button.SetText(base::string16());
EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size);
EXPECT_GT(button.GetPreferredSize().height(), image_size);
button.SetImage(Button::STATE_NORMAL, gfx::ImageSkia());
EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size);
EXPECT_GT(button.GetPreferredSize().height(), image_size);
// Clamp the size to a maximum value.
button.set_max_size(gfx::Size(image_size, 1));
EXPECT_EQ(button.GetPreferredSize(), gfx::Size(image_size, 1));
// Clear the monotonically increasing minimum size.
button.set_min_size(gfx::Size());
EXPECT_LT(button.GetPreferredSize().width(), text_width);
EXPECT_LT(button.GetPreferredSize().width(), image_size);
EXPECT_LT(button.GetPreferredSize().height(), image_size);
}
TEST_F(LabelButtonTest, FontList) {
const base::string16 text(ASCIIToUTF16("abc"));
LabelButton button(NULL, text);
const gfx::FontList original_font_list = button.GetFontList();
const gfx::FontList large_font_list =
original_font_list.DeriveWithSizeDelta(100);
const int original_width = button.GetPreferredSize().width();
const int original_height = button.GetPreferredSize().height();
// The button size increases when the font size is increased.
button.SetFontList(large_font_list);
EXPECT_GT(button.GetPreferredSize().width(), original_width);
EXPECT_GT(button.GetPreferredSize().height(), original_height);
// The button returns to its original size when the minimal size is cleared
// and the original font size is restored.
button.set_min_size(gfx::Size());
button.SetFontList(original_font_list);
EXPECT_EQ(original_width, button.GetPreferredSize().width());
EXPECT_EQ(original_height, button.GetPreferredSize().height());
}
} // namespace views
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