1 // Copyright 2013 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/corewm/tooltip_aura.h" 6 7 #include "base/strings/utf_string_conversions.h" 8 #include "ui/aura/test/aura_test_base.h" 9 #include "ui/gfx/font_list.h" 10 #include "ui/gfx/text_elider.h" 11 #include "ui/gfx/text_utils.h" 12 13 using base::ASCIIToUTF16; 14 using base::UTF8ToUTF16; 15 16 namespace views { 17 namespace corewm { 18 19 typedef aura::test::AuraTestBase TooltipAuraTest; 20 21 TEST_F(TooltipAuraTest, TrimTooltipToFitTests) { 22 const gfx::FontList font_list; 23 const int max_width = 4000; 24 base::string16 tooltip; 25 int width, line_count, expect_lines; 26 int max_pixel_width = 400; // copied from constants in tooltip_controller.cc 27 int max_lines = 10; // copied from constants in tooltip_controller.cc 28 size_t tooltip_len; 29 30 // Error in computed size vs. expected size should not be greater than the 31 // size of the longest word. 32 int error_in_pixel_width = gfx::GetStringWidth(ASCIIToUTF16("tooltip"), 33 font_list); 34 35 // Long tooltips should wrap to next line 36 tooltip.clear(); 37 width = line_count = -1; 38 expect_lines = 3; 39 for (; gfx::GetStringWidth(tooltip, font_list) <= 40 (expect_lines - 1) * max_pixel_width;) 41 tooltip.append(ASCIIToUTF16("This is part of the tooltip")); 42 tooltip_len = tooltip.length(); 43 TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width, 44 &line_count); 45 EXPECT_NEAR(max_pixel_width, width, error_in_pixel_width); 46 EXPECT_EQ(expect_lines, line_count); 47 EXPECT_EQ(tooltip_len + expect_lines - 1, tooltip.length()); 48 49 // More than |max_lines| lines should get truncated at 10 lines. 50 tooltip.clear(); 51 width = line_count = -1; 52 expect_lines = 13; 53 for (; gfx::GetStringWidth(tooltip, font_list) <= 54 (expect_lines - 1) * max_pixel_width;) 55 tooltip.append(ASCIIToUTF16("This is part of the tooltip")); 56 TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width, 57 &line_count); 58 EXPECT_NEAR(max_pixel_width, width, error_in_pixel_width); 59 EXPECT_EQ(max_lines, line_count); 60 61 // Long multi line tooltips should wrap individual lines. 62 tooltip.clear(); 63 width = line_count = -1; 64 expect_lines = 4; 65 for (; gfx::GetStringWidth(tooltip, font_list) <= 66 (expect_lines - 2) * max_pixel_width;) 67 tooltip.append(ASCIIToUTF16("This is part of the tooltip")); 68 tooltip.insert(tooltip.length() / 2, ASCIIToUTF16("\n")); 69 tooltip_len = tooltip.length(); 70 TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width, 71 &line_count); 72 EXPECT_NEAR(max_pixel_width, width, error_in_pixel_width); 73 EXPECT_EQ(expect_lines, line_count); 74 // We may have inserted the line break above near a space which will get 75 // trimmed. Hence we may be off by 1 in the final tooltip length calculation. 76 EXPECT_NEAR(tooltip_len + expect_lines - 2, tooltip.length(), 1); 77 78 #if !defined(OS_WIN) 79 // Tooltip with really long word gets elided. 80 tooltip.clear(); 81 width = line_count = -1; 82 tooltip = UTF8ToUTF16(std::string('a', max_pixel_width)); 83 TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width, 84 &line_count); 85 EXPECT_NEAR(max_pixel_width, width, 5); 86 EXPECT_EQ(1, line_count); 87 EXPECT_EQ(gfx::ElideText(UTF8ToUTF16(std::string('a', max_pixel_width)), 88 font_list, max_pixel_width, gfx::ELIDE_TAIL), 89 tooltip); 90 #endif 91 92 // Normal small tooltip should stay as is. 93 tooltip.clear(); 94 width = line_count = -1; 95 tooltip = ASCIIToUTF16("Small Tooltip"); 96 TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width, 97 &line_count); 98 EXPECT_EQ(gfx::GetStringWidth(ASCIIToUTF16("Small Tooltip"), font_list), 99 width); 100 EXPECT_EQ(1, line_count); 101 EXPECT_EQ(ASCIIToUTF16("Small Tooltip"), tooltip); 102 103 // Normal small multi-line tooltip should stay as is. 104 tooltip.clear(); 105 width = line_count = -1; 106 tooltip = ASCIIToUTF16("Multi line\nTooltip"); 107 TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width, 108 &line_count); 109 int expected_width = gfx::GetStringWidth(ASCIIToUTF16("Multi line"), 110 font_list); 111 expected_width = std::max(expected_width, 112 gfx::GetStringWidth(ASCIIToUTF16("Tooltip"), 113 font_list)); 114 EXPECT_EQ(expected_width, width); 115 EXPECT_EQ(2, line_count); 116 EXPECT_EQ(ASCIIToUTF16("Multi line\nTooltip"), tooltip); 117 118 // Whitespaces in tooltips are preserved. 119 tooltip.clear(); 120 width = line_count = -1; 121 tooltip = ASCIIToUTF16("Small Tool t\tip"); 122 TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width, 123 &line_count); 124 EXPECT_EQ(gfx::GetStringWidth(ASCIIToUTF16("Small Tool t\tip"), font_list), 125 width); 126 EXPECT_EQ(1, line_count); 127 EXPECT_EQ(ASCIIToUTF16("Small Tool t\tip"), tooltip); 128 } 129 130 } // namespace corewm 131 } // namespace views 132
