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// 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 "ui/views/corewm/tooltip_aura.h"
#include "base/strings/utf_string_conversions.h"
#include "ui/aura/test/aura_test_base.h"
#include "ui/base/resource/resource_bundle.h"
#include "ui/gfx/font_list.h"
#include "ui/gfx/text_elider.h"
#include "ui/gfx/text_utils.h"
using base::ASCIIToUTF16;
using base::UTF8ToUTF16;
namespace views {
namespace corewm {
typedef aura::test::AuraTestBase TooltipAuraTest;
TEST_F(TooltipAuraTest, TrimTooltipToFitTests) {
const gfx::FontList font_list;
const int max_width = 4000;
base::string16 tooltip;
int width, line_count, expect_lines;
int max_pixel_width = 400; // copied from constants in tooltip_controller.cc
int max_lines = 10; // copied from constants in tooltip_controller.cc
size_t tooltip_len;
// Error in computed size vs. expected size should not be greater than the
// size of the longest word.
int error_in_pixel_width = gfx::GetStringWidth(ASCIIToUTF16("tooltip"),
font_list);
// Long tooltips should wrap to next line
tooltip.clear();
width = line_count = -1;
expect_lines = 3;
for (; gfx::GetStringWidth(tooltip, font_list) <=
(expect_lines - 1) * max_pixel_width;)
tooltip.append(ASCIIToUTF16("This is part of the tooltip"));
tooltip_len = tooltip.length();
TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width,
&line_count);
EXPECT_NEAR(max_pixel_width, width, error_in_pixel_width);
EXPECT_EQ(expect_lines, line_count);
EXPECT_EQ(tooltip_len + expect_lines - 1, tooltip.length());
// More than |max_lines| lines should get truncated at 10 lines.
tooltip.clear();
width = line_count = -1;
expect_lines = 13;
for (; gfx::GetStringWidth(tooltip, font_list) <=
(expect_lines - 1) * max_pixel_width;)
tooltip.append(ASCIIToUTF16("This is part of the tooltip"));
TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width,
&line_count);
EXPECT_NEAR(max_pixel_width, width, error_in_pixel_width);
EXPECT_EQ(max_lines, line_count);
// Long multi line tooltips should wrap individual lines.
tooltip.clear();
width = line_count = -1;
expect_lines = 4;
for (; gfx::GetStringWidth(tooltip, font_list) <=
(expect_lines - 2) * max_pixel_width;)
tooltip.append(ASCIIToUTF16("This is part of the tooltip"));
tooltip.insert(tooltip.length() / 2, ASCIIToUTF16("\n"));
tooltip_len = tooltip.length();
TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width,
&line_count);
EXPECT_NEAR(max_pixel_width, width, error_in_pixel_width);
EXPECT_EQ(expect_lines, line_count);
// We may have inserted the line break above near a space which will get
// trimmed. Hence we may be off by 1 in the final tooltip length calculation.
EXPECT_NEAR(tooltip_len + expect_lines - 2, tooltip.length(), 1);
#if !defined(OS_WIN)
// Tooltip with really long word gets elided.
tooltip.clear();
width = line_count = -1;
tooltip = UTF8ToUTF16(std::string('a', max_pixel_width));
TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width,
&line_count);
EXPECT_NEAR(max_pixel_width, width, 5);
EXPECT_EQ(1, line_count);
EXPECT_EQ(gfx::ElideText(UTF8ToUTF16(std::string('a', max_pixel_width)),
font_list, max_pixel_width, gfx::ELIDE_TAIL),
tooltip);
#endif
// Normal small tooltip should stay as is.
tooltip.clear();
width = line_count = -1;
tooltip = ASCIIToUTF16("Small Tooltip");
TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width,
&line_count);
EXPECT_EQ(gfx::GetStringWidth(ASCIIToUTF16("Small Tooltip"), font_list),
width);
EXPECT_EQ(1, line_count);
EXPECT_EQ(ASCIIToUTF16("Small Tooltip"), tooltip);
// Normal small multi-line tooltip should stay as is.
tooltip.clear();
width = line_count = -1;
tooltip = ASCIIToUTF16("Multi line\nTooltip");
TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width,
&line_count);
int expected_width = gfx::GetStringWidth(ASCIIToUTF16("Multi line"),
font_list);
expected_width = std::max(expected_width,
gfx::GetStringWidth(ASCIIToUTF16("Tooltip"),
font_list));
EXPECT_EQ(expected_width, width);
EXPECT_EQ(2, line_count);
EXPECT_EQ(ASCIIToUTF16("Multi line\nTooltip"), tooltip);
// Whitespaces in tooltips are preserved.
tooltip.clear();
width = line_count = -1;
tooltip = ASCIIToUTF16("Small Tool t\tip");
TooltipAura::TrimTooltipToFit(font_list, max_width, &tooltip, &width,
&line_count);
EXPECT_EQ(gfx::GetStringWidth(ASCIIToUTF16("Small Tool t\tip"), font_list),
width);
EXPECT_EQ(1, line_count);
EXPECT_EQ(ASCIIToUTF16("Small Tool t\tip"), tooltip);
}
} // namespace corewm
} // namespace views
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