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ui/views/controls/label.cc

Index: ui/views/controls/label.cc
diff --git a/ui/views/controls/label.cc b/ui/views/controls/label.cc
deleted file mode 100644
index 1078d0b5a8a84e7ae22165cd2eb6e4a7065e6e4c..0000000000000000000000000000000000000000
--- a/ui/views/controls/label.cc
+++ /dev/null
@@ -1,548 +0,0 @@
-// 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 <algorithm>
-#include <cmath>
-#include <limits>
-#include <vector>
-
-#include "base/i18n/rtl.h"
-#include "base/logging.h"
-#include "base/strings/string_split.h"
-#include "base/strings/string_util.h"
-#include "base/strings/utf_string_conversions.h"
-#include "ui/accessibility/ax_view_state.h"
-#include "ui/gfx/canvas.h"
-#include "ui/gfx/color_utils.h"
-#include "ui/gfx/insets.h"
-#include "ui/gfx/text_elider.h"
-#include "ui/gfx/text_utils.h"
-#include "ui/gfx/utf16_indexing.h"
-#include "ui/native_theme/native_theme.h"
-#include "ui/views/background.h"
-
-namespace {
-
-const int kCachedSizeLimit = 10;
-const base::char16 kPasswordReplacementChar = '*';
-
-}  // namespace
-
-namespace views {
-
-// static
-const char Label::kViewClassName[] = "Label";
-const int Label::kFocusBorderPadding = 1;
-
-Label::Label() {
-  Init(base::string16(), gfx::FontList());
-}
-
-Label::Label(const base::string16& text) {
-  Init(text, gfx::FontList());
-}
-
-Label::Label(const base::string16& text, const gfx::FontList& font_list) {
-  Init(text, font_list);
-}
-
-Label::~Label() {
-}
-
-void Label::SetFontList(const gfx::FontList& font_list) {
-  font_list_ = font_list;
-  ResetCachedSize();
-  PreferredSizeChanged();
-  SchedulePaint();
-}
-
-void Label::SetText(const base::string16& text) {
-  if (text != text_)
-    SetTextInternal(text);
-}
-
-void Label::SetTextInternal(const base::string16& text) {
-  text_ = text;
-
-  if (obscured_) {
-    size_t obscured_text_length =
-        static_cast<size_t>(gfx::UTF16IndexToOffset(text_, 0, text_.length()));
-    layout_text_.assign(obscured_text_length, kPasswordReplacementChar);
-  } else {
-    layout_text_ = text_;
-  }
-
-  ResetCachedSize();
-  PreferredSizeChanged();
-  SchedulePaint();
-}
-
-void Label::SetAutoColorReadabilityEnabled(bool enabled) {
-  auto_color_readability_ = enabled;
-  RecalculateColors();
-}
-
-void Label::SetEnabledColor(SkColor color) {
-  requested_enabled_color_ = color;
-  enabled_color_set_ = true;
-  RecalculateColors();
-}
-
-void Label::SetDisabledColor(SkColor color) {
-  requested_disabled_color_ = color;
-  disabled_color_set_ = true;
-  RecalculateColors();
-}
-
-void Label::SetBackgroundColor(SkColor color) {
-  background_color_ = color;
-  background_color_set_ = true;
-  RecalculateColors();
-}
-
-void Label::SetShadows(const gfx::ShadowValues& shadows) {
-  shadows_ = shadows;
-  text_size_valid_ = false;
-}
-
-void Label::SetSubpixelRenderingEnabled(bool subpixel_rendering_enabled) {
-  subpixel_rendering_enabled_ = subpixel_rendering_enabled;
-}
-
-void Label::SetHorizontalAlignment(gfx::HorizontalAlignment alignment) {
-  // If the UI layout is right-to-left, flip the alignment direction.
-  if (base::i18n::IsRTL() &&
-      (alignment == gfx::ALIGN_LEFT || alignment == gfx::ALIGN_RIGHT)) {
-    alignment = (alignment == gfx::ALIGN_LEFT) ?
-        gfx::ALIGN_RIGHT : gfx::ALIGN_LEFT;
-  }
-  if (horizontal_alignment_ != alignment) {
-    horizontal_alignment_ = alignment;
-    SchedulePaint();
-  }
-}
-
-gfx::HorizontalAlignment Label::GetHorizontalAlignment() const {
-  if (horizontal_alignment_ != gfx::ALIGN_TO_HEAD)
-    return horizontal_alignment_;
-
-  const base::i18n::TextDirection dir =
-      base::i18n::GetFirstStrongCharacterDirection(layout_text_);
-  return dir == base::i18n::RIGHT_TO_LEFT ? gfx::ALIGN_RIGHT : gfx::ALIGN_LEFT;
-}
-
-void Label::SetLineHeight(int height) {
-  if (height != line_height_) {
-    line_height_ = height;
-    ResetCachedSize();
-    PreferredSizeChanged();
-    SchedulePaint();
-  }
-}
-
-void Label::SetMultiLine(bool multi_line) {
-  DCHECK(!multi_line || (elide_behavior_ == gfx::ELIDE_TAIL ||
-                         elide_behavior_ == gfx::NO_ELIDE));
-  if (multi_line != multi_line_) {
-    multi_line_ = multi_line;
-    ResetCachedSize();
-    PreferredSizeChanged();
-    SchedulePaint();
-  }
-}
-
-void Label::SetObscured(bool obscured) {
-  if (obscured != obscured_) {
-    obscured_ = obscured;
-    SetTextInternal(text_);
-  }
-}
-
-void Label::SetAllowCharacterBreak(bool allow_character_break) {
-  if (allow_character_break != allow_character_break_) {
-    allow_character_break_ = allow_character_break;
-    ResetCachedSize();
-    PreferredSizeChanged();
-    SchedulePaint();
-  }
-}
-
-void Label::SetElideBehavior(gfx::ElideBehavior elide_behavior) {
-  DCHECK(!multi_line_ || (elide_behavior_ == gfx::ELIDE_TAIL ||
-                          elide_behavior_ == gfx::NO_ELIDE));
-  if (elide_behavior != elide_behavior_) {
-    elide_behavior_ = elide_behavior;
-    ResetCachedSize();
-    PreferredSizeChanged();
-    SchedulePaint();
-  }
-}
-
-void Label::SetTooltipText(const base::string16& tooltip_text) {
-  DCHECK(handles_tooltips_);
-  tooltip_text_ = tooltip_text;
-}
-
-void Label::SetHandlesTooltips(bool enabled) {
-  handles_tooltips_ = enabled;
-}
-
-void Label::SizeToFit(int max_width) {
-  DCHECK(multi_line_);
-
-  std::vector<base::string16> lines;
-  base::SplitString(layout_text_, '\n', &lines);
-
-  int label_width = 0;
-  for (std::vector<base::string16>::const_iterator iter = lines.begin();
-       iter != lines.end(); ++iter) {
-    label_width = std::max(label_width, gfx::GetStringWidth(*iter, font_list_));
-  }
-
-  label_width += GetInsets().width();
-
-  if (max_width > 0)
-    label_width = std::min(label_width, max_width);
-
-  SetBounds(x(), y(), label_width, 0);
-  SizeToPreferredSize();
-}
-
-const base::string16& Label::GetLayoutTextForTesting() const {
-  return layout_text_;
-}
-
-gfx::Insets Label::GetInsets() const {
-  gfx::Insets insets = View::GetInsets();
-  if (focusable()) {
-    insets += gfx::Insets(kFocusBorderPadding, kFocusBorderPadding,
-                          kFocusBorderPadding, kFocusBorderPadding);
-  }
-  return insets;
-}
-
-int Label::GetBaseline() const {
-  return GetInsets().top() + font_list_.GetBaseline();
-}
-
-gfx::Size Label::GetPreferredSize() const {
-  // Return a size of (0, 0) if the label is not visible and if the
-  // collapse_when_hidden_ flag is set.
-  // TODO(munjal): This logic probably belongs to the View class. But for now,
-  // put it here since putting it in View class means all inheriting classes
-  // need ot respect the collapse_when_hidden_ flag.
-  if (!visible() && collapse_when_hidden_)
-    return gfx::Size();
-
-  gfx::Size size(GetTextSize());
-  gfx::Insets insets = GetInsets();
-  size.Enlarge(insets.width(), insets.height());
-  return size;
-}
-
-gfx::Size Label::GetMinimumSize() const {
-  gfx::Size text_size(GetTextSize());
-  if ((!visible() && collapse_when_hidden_) || text_size.IsEmpty())
-    return gfx::Size();
-
-  gfx::Size size(gfx::GetStringWidth(base::string16(gfx::kEllipsisUTF16),
-                                     font_list_),
-                 font_list_.GetHeight());
-  size.SetToMin(text_size);  // The actual text may be shorter than an ellipsis.
-  gfx::Insets insets = GetInsets();
-  size.Enlarge(insets.width(), insets.height());
-  return size;
-}
-
-int Label::GetHeightForWidth(int w) const {
-  if (!multi_line_)
-    return View::GetHeightForWidth(w);
-
-  w = std::max(0, w - GetInsets().width());
-
-  for (size_t i = 0; i < cached_heights_.size(); ++i) {
-    const gfx::Size& s = cached_heights_[i];
-    if (s.width() == w)
-      return s.height() + GetInsets().height();
-  }
-
-  int cache_width = w;
-
-  int h = font_list_.GetHeight();
-  const int flags = ComputeDrawStringFlags();
-  gfx::Canvas::SizeStringInt(
-      layout_text_, font_list_, &w, &h, line_height_, flags);
-  cached_heights_[cached_heights_cursor_] = gfx::Size(cache_width, h);
-  cached_heights_cursor_ = (cached_heights_cursor_ + 1) % kCachedSizeLimit;
-  return h + GetInsets().height();
-}
-
-const char* Label::GetClassName() const {
-  return kViewClassName;
-}
-
-View* Label::GetTooltipHandlerForPoint(const gfx::Point& point) {
-  if (!handles_tooltips_ ||
-      (tooltip_text_.empty() && !ShouldShowDefaultTooltip()))
-    return NULL;
-
-  return HitTestPoint(point) ? this : NULL;
-}
-
-bool Label::CanProcessEventsWithinSubtree() const {
-  // Send events to the parent view for handling.
-  return false;
-}
-
-void Label::GetAccessibleState(ui::AXViewState* state) {
-  state->role = ui::AX_ROLE_STATIC_TEXT;
-  state->AddStateFlag(ui::AX_STATE_READ_ONLY);
-  state->name = layout_text_;
-}
-
-bool Label::GetTooltipText(const gfx::Point& p, base::string16* tooltip) const {
-  if (!handles_tooltips_)
-    return false;
-
-  if (!tooltip_text_.empty()) {
-    tooltip->assign(tooltip_text_);
-    return true;
-  }
-
-  if (ShouldShowDefaultTooltip()) {
-    *tooltip = layout_text_;
-    return true;
-  }
-
-  return false;
-}
-
-void Label::PaintText(gfx::Canvas* canvas,
-                      const base::string16& text,
-                      const gfx::Rect& text_bounds,
-                      int flags) {
-  SkColor color = enabled() ? actual_enabled_color_ : actual_disabled_color_;
-  if (elide_behavior_ == gfx::FADE_TAIL) {
-    canvas->DrawFadedString(text, font_list_, color, text_bounds, flags);
-  } else {
-    canvas->DrawStringRectWithShadows(text, font_list_, color, text_bounds,
-                                      line_height_, flags, shadows_);
-  }
-
-  if (HasFocus()) {
-    gfx::Rect focus_bounds = text_bounds;
-    focus_bounds.Inset(-kFocusBorderPadding, -kFocusBorderPadding);
-    canvas->DrawFocusRect(focus_bounds);
-  }
-}
-
-gfx::Size Label::GetTextSize() const {
-  if (!text_size_valid_) {
-    // For single-line strings, we supply the largest possible width, because
-    // while adding NO_ELLIPSIS to the flags works on Windows for forcing
-    // SizeStringInt() to calculate the desired width, it doesn't seem to work
-    // on Linux.
-    int w = multi_line_ ?
-        GetAvailableRect().width() : std::numeric_limits<int>::max();
-    int h = font_list_.GetHeight();
-    // For single-line strings, ignore the available width and calculate how
-    // wide the text wants to be.
-    int flags = ComputeDrawStringFlags();
-    if (!multi_line_)
-      flags |= gfx::Canvas::NO_ELLIPSIS;
-    gfx::Canvas::SizeStringInt(
-        layout_text_, font_list_, &w, &h, line_height_, flags);
-    text_size_.SetSize(w, h);
-    const gfx::Insets shadow_margin = -gfx::ShadowValue::GetMargin(shadows_);
-    text_size_.Enlarge(shadow_margin.width(), shadow_margin.height());
-    text_size_valid_ = true;
-  }
-
-  return text_size_;
-}
-
-void Label::OnBoundsChanged(const gfx::Rect& previous_bounds) {
-  text_size_valid_ &= !multi_line_;
-}
-
-void Label::OnPaint(gfx::Canvas* canvas) {
-  OnPaintBackground(canvas);
-  // We skip painting the focus border because it is being handled seperately by
-  // some subclasses of Label. We do not want View's focus border painting to
-  // interfere with that.
-  OnPaintBorder(canvas);
-
-  base::string16 paint_text;
-  gfx::Rect text_bounds;
-  int flags = 0;
-  CalculateDrawStringParams(&paint_text, &text_bounds, &flags);
-  PaintText(canvas, paint_text, text_bounds, flags);
-}
-
-void Label::OnNativeThemeChanged(const ui::NativeTheme* theme) {
-  UpdateColorsFromTheme(theme);
-}
-
-void Label::Init(const base::string16& text, const gfx::FontList& font_list) {
-  font_list_ = font_list;
-  enabled_color_set_ = disabled_color_set_ = background_color_set_ = false;
-  subpixel_rendering_enabled_ = true;
-  auto_color_readability_ = true;
-  UpdateColorsFromTheme(ui::NativeTheme::instance());
-  horizontal_alignment_ = gfx::ALIGN_CENTER;
-  line_height_ = 0;
-  multi_line_ = false;
-  obscured_ = false;
-  allow_character_break_ = false;
-  elide_behavior_ = gfx::ELIDE_TAIL;
-  handles_tooltips_ = true;
-  collapse_when_hidden_ = false;
-  cached_heights_.resize(kCachedSizeLimit);
-  ResetCachedSize();
-
-  SetText(text);
-}
-
-void Label::RecalculateColors() {
-  actual_enabled_color_ = auto_color_readability_ ?
-      color_utils::GetReadableColor(requested_enabled_color_,
-                                    background_color_) :
-      requested_enabled_color_;
-  actual_disabled_color_ = auto_color_readability_ ?
-      color_utils::GetReadableColor(requested_disabled_color_,
-                                    background_color_) :
-      requested_disabled_color_;
-}
-
-gfx::Rect Label::GetTextBounds() const {
-  gfx::Rect available(GetAvailableRect());
-  gfx::Size text_size(GetTextSize());
-  text_size.set_width(std::min(available.width(), text_size.width()));
-  gfx::Point origin(GetInsets().left(), GetInsets().top());
-  switch (GetHorizontalAlignment()) {
-    case gfx::ALIGN_LEFT:
-      break;
-    case gfx::ALIGN_CENTER:
-      // Put any extra margin pixel on the left to match the legacy behavior
-      // from the use of GetTextExtentPoint32() on Windows.
-      origin.Offset((available.width() + 1 - text_size.width()) / 2, 0);
-      break;
-    case gfx::ALIGN_RIGHT:
-      origin.set_x(available.right() - text_size.width());
-      break;
-    default:
-      NOTREACHED();
-      break;
-  }
-  text_size.set_height(available.height());
-  return gfx::Rect(origin, text_size);
-}
-
-int Label::ComputeDrawStringFlags() const {
-  int flags = 0;
-
-  // We can't use subpixel rendering if the background is non-opaque.
-  if (SkColorGetA(background_color_) != 0xFF || !subpixel_rendering_enabled_)
-    flags |= gfx::Canvas::NO_SUBPIXEL_RENDERING;
-
-  base::i18n::TextDirection direction =
-      base::i18n::GetFirstStrongCharacterDirection(layout_text_);
-  if (direction == base::i18n::RIGHT_TO_LEFT)
-    flags |= gfx::Canvas::FORCE_RTL_DIRECTIONALITY;
-  else
-    flags |= gfx::Canvas::FORCE_LTR_DIRECTIONALITY;
-
-  switch (GetHorizontalAlignment()) {
-    case gfx::ALIGN_LEFT:
-      flags |= gfx::Canvas::TEXT_ALIGN_LEFT;
-      break;
-    case gfx::ALIGN_CENTER:
-      flags |= gfx::Canvas::TEXT_ALIGN_CENTER;
-      break;
-    case gfx::ALIGN_RIGHT:
-      flags |= gfx::Canvas::TEXT_ALIGN_RIGHT;
-      break;
-    default:
-      NOTREACHED();
-      break;
-  }
-
-  if (!multi_line_)
-    return flags;
-
-  flags |= gfx::Canvas::MULTI_LINE;
-#if !defined(OS_WIN)
-    // Don't elide multiline labels on Linux.
-    // Todo(davemoore): Do we depend on eliding multiline text?
-    // Pango insists on limiting the number of lines to one if text is
-    // elided. You can get around this if you can pass a maximum height
-    // but we don't currently have that data when we call the pango code.
-    flags |= gfx::Canvas::NO_ELLIPSIS;
-#endif
-  if (allow_character_break_)
-    flags |= gfx::Canvas::CHARACTER_BREAK;
-
-  return flags;
-}
-
-gfx::Rect Label::GetAvailableRect() const {
-  gfx::Rect bounds(size());
-  bounds.Inset(GetInsets());
-  return bounds;
-}
-
-void Label::CalculateDrawStringParams(base::string16* paint_text,
-                                      gfx::Rect* text_bounds,
-                                      int* flags) const {
-  DCHECK(paint_text && text_bounds && flags);
-
-  const bool forbid_ellipsis = elide_behavior_ == gfx::NO_ELIDE ||
-                               elide_behavior_ == gfx::FADE_TAIL;
-  if (multi_line_ || forbid_ellipsis) {
-    *paint_text = layout_text_;
-  } else {
-    *paint_text = gfx::ElideText(layout_text_, font_list_,
-                                 GetAvailableRect().width(), elide_behavior_);
-  }
-
-  *text_bounds = GetTextBounds();
-  *flags = ComputeDrawStringFlags();
-  // TODO(msw): Elide multi-line text with ElideRectangleText instead.
-  if (!multi_line_ || forbid_ellipsis)
-    *flags |= gfx::Canvas::NO_ELLIPSIS;
-}
-
-void Label::UpdateColorsFromTheme(const ui::NativeTheme* theme) {
-  if (!enabled_color_set_) {
-    requested_enabled_color_ = theme->GetSystemColor(
-        ui::NativeTheme::kColorId_LabelEnabledColor);
-  }
-  if (!disabled_color_set_) {
-    requested_disabled_color_ = theme->GetSystemColor(
-        ui::NativeTheme::kColorId_LabelDisabledColor);
-  }
-  if (!background_color_set_) {
-    background_color_ = theme->GetSystemColor(
-        ui::NativeTheme::kColorId_LabelBackgroundColor);
-  }
-  RecalculateColors();
-}
-
-void Label::ResetCachedSize() {
-  text_size_valid_ = false;
-  cached_heights_cursor_ = 0;
-  for (int i = 0; i < kCachedSizeLimit; ++i)
-    cached_heights_[i] = gfx::Size();
-}
-
-bool Label::ShouldShowDefaultTooltip() const {
-  const gfx::Size text_size = GetTextSize();
-  const gfx::Size size = GetContentsBounds().size();
-  return !obscured() && (text_size.width() > size.width() ||
-                         (multi_line_ && text_size.height() > size.height()));
-}
-
-}  // namespace views