1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "ui/views/controls/button/label_button.h" 6 7 #include "base/strings/utf_string_conversions.h" 8 #include "third_party/skia/include/core/SkBitmap.h" 9 #include "ui/gfx/canvas.h" 10 #include "ui/gfx/font_list.h" 11 #include "ui/gfx/size.h" 12 #include "ui/gfx/text_utils.h" 13 #include "ui/views/test/views_test_base.h" 14 15 using base::ASCIIToUTF16; 16 17 namespace { 18 19 gfx::ImageSkia CreateTestImage(int width, int height) { 20 SkBitmap bitmap; 21 bitmap.allocN32Pixels(width, height); 22 return gfx::ImageSkia::CreateFrom1xBitmap(bitmap); 23 } 24 25 } // namespace 26 27 namespace views { 28 29 typedef ViewsTestBase LabelButtonTest; 30 31 TEST_F(LabelButtonTest, Init) { 32 const base::string16 text(ASCIIToUTF16("abc")); 33 LabelButton button(NULL, text); 34 35 EXPECT_TRUE(button.GetImage(Button::STATE_NORMAL).isNull()); 36 EXPECT_TRUE(button.GetImage(Button::STATE_HOVERED).isNull()); 37 EXPECT_TRUE(button.GetImage(Button::STATE_PRESSED).isNull()); 38 EXPECT_TRUE(button.GetImage(Button::STATE_DISABLED).isNull()); 39 40 EXPECT_EQ(text, button.GetText()); 41 EXPECT_EQ(gfx::ALIGN_LEFT, button.GetHorizontalAlignment()); 42 EXPECT_FALSE(button.is_default()); 43 EXPECT_EQ(button.style(), Button::STYLE_TEXTBUTTON); 44 EXPECT_EQ(Button::STATE_NORMAL, button.state()); 45 46 EXPECT_EQ(button.image_->parent(), &button); 47 EXPECT_EQ(button.label_->parent(), &button); 48 } 49 50 TEST_F(LabelButtonTest, Label) { 51 LabelButton button(NULL, base::string16()); 52 EXPECT_TRUE(button.GetText().empty()); 53 54 const gfx::FontList font_list; 55 const base::string16 short_text(ASCIIToUTF16("abcdefghijklm")); 56 const base::string16 long_text(ASCIIToUTF16("abcdefghijklmnopqrstuvwxyz")); 57 const int short_text_width = gfx::GetStringWidth(short_text, font_list); 58 const int long_text_width = gfx::GetStringWidth(long_text, font_list); 59 60 // The width increases monotonically with string size (it does not shrink). 61 EXPECT_LT(button.GetPreferredSize().width(), short_text_width); 62 button.SetText(short_text); 63 EXPECT_GT(button.GetPreferredSize().height(), font_list.GetHeight()); 64 EXPECT_GT(button.GetPreferredSize().width(), short_text_width); 65 EXPECT_LT(button.GetPreferredSize().width(), long_text_width); 66 button.SetText(long_text); 67 EXPECT_GT(button.GetPreferredSize().width(), long_text_width); 68 button.SetText(short_text); 69 EXPECT_GT(button.GetPreferredSize().width(), long_text_width); 70 71 // Clamp the size to a maximum value. 72 button.SetMaxSize(gfx::Size(long_text_width, 1)); 73 EXPECT_EQ(button.GetPreferredSize(), gfx::Size(long_text_width, 1)); 74 75 // Clear the monotonically increasing minimum size. 76 button.SetMinSize(gfx::Size()); 77 EXPECT_GT(button.GetPreferredSize().width(), short_text_width); 78 EXPECT_LT(button.GetPreferredSize().width(), long_text_width); 79 } 80 81 TEST_F(LabelButtonTest, Image) { 82 LabelButton button(NULL, base::string16()); 83 84 const int small_size = 50, large_size = 100; 85 const gfx::ImageSkia small_image = CreateTestImage(small_size, small_size); 86 const gfx::ImageSkia large_image = CreateTestImage(large_size, large_size); 87 88 // The width increases monotonically with image size (it does not shrink). 89 EXPECT_LT(button.GetPreferredSize().width(), small_size); 90 EXPECT_LT(button.GetPreferredSize().height(), small_size); 91 button.SetImage(Button::STATE_NORMAL, small_image); 92 EXPECT_GT(button.GetPreferredSize().width(), small_size); 93 EXPECT_GT(button.GetPreferredSize().height(), small_size); 94 EXPECT_LT(button.GetPreferredSize().width(), large_size); 95 EXPECT_LT(button.GetPreferredSize().height(), large_size); 96 button.SetImage(Button::STATE_NORMAL, large_image); 97 EXPECT_GT(button.GetPreferredSize().width(), large_size); 98 EXPECT_GT(button.GetPreferredSize().height(), large_size); 99 button.SetImage(Button::STATE_NORMAL, small_image); 100 EXPECT_GT(button.GetPreferredSize().width(), large_size); 101 EXPECT_GT(button.GetPreferredSize().height(), large_size); 102 103 // Clamp the size to a maximum value. 104 button.SetMaxSize(gfx::Size(large_size, 1)); 105 EXPECT_EQ(button.GetPreferredSize(), gfx::Size(large_size, 1)); 106 107 // Clear the monotonically increasing minimum size. 108 button.SetMinSize(gfx::Size()); 109 EXPECT_GT(button.GetPreferredSize().width(), small_size); 110 EXPECT_LT(button.GetPreferredSize().width(), large_size); 111 } 112 113 TEST_F(LabelButtonTest, LabelAndImage) { 114 LabelButton button(NULL, base::string16()); 115 116 const gfx::FontList font_list; 117 const base::string16 text(ASCIIToUTF16("abcdefghijklm")); 118 const int text_width = gfx::GetStringWidth(text, font_list); 119 120 const int image_size = 50; 121 const gfx::ImageSkia image = CreateTestImage(image_size, image_size); 122 ASSERT_LT(font_list.GetHeight(), image_size); 123 124 // The width increases monotonically with content size (it does not shrink). 125 EXPECT_LT(button.GetPreferredSize().width(), text_width); 126 EXPECT_LT(button.GetPreferredSize().width(), image_size); 127 EXPECT_LT(button.GetPreferredSize().height(), image_size); 128 button.SetText(text); 129 EXPECT_GT(button.GetPreferredSize().width(), text_width); 130 EXPECT_GT(button.GetPreferredSize().height(), font_list.GetHeight()); 131 EXPECT_LT(button.GetPreferredSize().width(), text_width + image_size); 132 EXPECT_LT(button.GetPreferredSize().height(), image_size); 133 button.SetImage(Button::STATE_NORMAL, image); 134 EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size); 135 EXPECT_GT(button.GetPreferredSize().height(), image_size); 136 137 // Layout and ensure the image is left of the label except for ALIGN_RIGHT. 138 // (A proper parent view or layout manager would Layout on its invalidations). 139 button.SetSize(button.GetPreferredSize()); 140 button.Layout(); 141 EXPECT_EQ(gfx::ALIGN_LEFT, button.GetHorizontalAlignment()); 142 EXPECT_LT(button.image_->bounds().right(), button.label_->bounds().x()); 143 button.SetHorizontalAlignment(gfx::ALIGN_CENTER); 144 button.Layout(); 145 EXPECT_EQ(gfx::ALIGN_CENTER, button.GetHorizontalAlignment()); 146 EXPECT_LT(button.image_->bounds().right(), button.label_->bounds().x()); 147 button.SetHorizontalAlignment(gfx::ALIGN_RIGHT); 148 button.Layout(); 149 EXPECT_EQ(gfx::ALIGN_RIGHT, button.GetHorizontalAlignment()); 150 EXPECT_LT(button.label_->bounds().right(), button.image_->bounds().x()); 151 152 button.SetText(base::string16()); 153 EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size); 154 EXPECT_GT(button.GetPreferredSize().height(), image_size); 155 button.SetImage(Button::STATE_NORMAL, gfx::ImageSkia()); 156 EXPECT_GT(button.GetPreferredSize().width(), text_width + image_size); 157 EXPECT_GT(button.GetPreferredSize().height(), image_size); 158 159 // Clamp the size to a maximum value. 160 button.SetMaxSize(gfx::Size(image_size, 1)); 161 EXPECT_EQ(button.GetPreferredSize(), gfx::Size(image_size, 1)); 162 163 // Clear the monotonically increasing minimum size. 164 button.SetMinSize(gfx::Size()); 165 EXPECT_LT(button.GetPreferredSize().width(), text_width); 166 EXPECT_LT(button.GetPreferredSize().width(), image_size); 167 EXPECT_LT(button.GetPreferredSize().height(), image_size); 168 } 169 170 TEST_F(LabelButtonTest, FontList) { 171 const base::string16 text(ASCIIToUTF16("abc")); 172 LabelButton button(NULL, text); 173 174 const gfx::FontList original_font_list = button.GetFontList(); 175 const gfx::FontList large_font_list = 176 original_font_list.DeriveWithSizeDelta(100); 177 const int original_width = button.GetPreferredSize().width(); 178 const int original_height = button.GetPreferredSize().height(); 179 180 // The button size increases when the font size is increased. 181 button.SetFontList(large_font_list); 182 EXPECT_GT(button.GetPreferredSize().width(), original_width); 183 EXPECT_GT(button.GetPreferredSize().height(), original_height); 184 185 // The button returns to its original size when the minimal size is cleared 186 // and the original font size is restored. 187 button.SetMinSize(gfx::Size()); 188 button.SetFontList(original_font_list); 189 EXPECT_EQ(original_width, button.GetPreferredSize().width()); 190 EXPECT_EQ(original_height, button.GetPreferredSize().height()); 191 } 192 193 TEST_F(LabelButtonTest, ChangeTextSize) { 194 const base::string16 text(ASCIIToUTF16("abc")); 195 const base::string16 longer_text(ASCIIToUTF16("abcdefghijklm")); 196 LabelButton button(NULL, text); 197 198 const int original_width = button.GetPreferredSize().width(); 199 200 // The button size increases when the text size is increased. 201 button.SetText(longer_text); 202 EXPECT_GT(button.GetPreferredSize().width(), original_width); 203 204 // The button returns to its original size when the original text is restored. 205 button.SetMinSize(gfx::Size()); 206 button.SetText(text); 207 EXPECT_EQ(original_width, button.GetPreferredSize().width()); 208 } 209 210 TEST_F(LabelButtonTest, ChangeLabelImageSpacing) { 211 LabelButton button(NULL, ASCIIToUTF16("abc")); 212 button.SetImage(Button::STATE_NORMAL, CreateTestImage(50, 50)); 213 214 const int kOriginalSpacing = 5; 215 button.SetImageLabelSpacing(kOriginalSpacing); 216 const int original_width = button.GetPreferredSize().width(); 217 218 // Increasing the spacing between the text and label should increase the size. 219 button.SetImageLabelSpacing(2 * kOriginalSpacing); 220 EXPECT_GT(button.GetPreferredSize().width(), original_width); 221 222 // The button shrinks if the original spacing is restored. 223 button.SetMinSize(gfx::Size()); 224 button.SetImageLabelSpacing(kOriginalSpacing); 225 EXPECT_EQ(original_width, button.GetPreferredSize().width()); 226 } 227 228 } // namespace views 229
