Reintroduce password support to NativeTextfieldViews

ui/gfx/render_text.cc

 // 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/gfx/render_text.h"
 
 #include <algorithm>
 
 #include "base/debug/trace_event.h"
 #include "base/i18n/break_iterator.h"
 #include "base/logging.h"
 #include "base/stl_util.h"
 #include "third_party/skia/include/core/SkTypeface.h"
 #include "third_party/skia/include/effects/SkGradientShader.h"
+#include "ui/base/text/utf16_indexing.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/canvas_skia.h"
 #include "ui/gfx/native_theme.h"
-#include "unicode/uchar.h"
 
 namespace {
 
+// All chars are replaced by this char when the password style is set.
+// TODO(benrg): GTK uses the first of U+25CF, U+2022, U+2731, U+273A, '*'
+// that's available in the font (find_invisible_char() in gtkentry.c).
+const char16 kPasswordReplacementChar = '*';
+
 // Default color used for the cursor.
 const SkColor kDefaultCursorColor = SK_ColorBLACK;
 
 #ifndef NDEBUG
 // Check StyleRanges invariant conditions: sorted and non-overlapping ranges.
 void CheckStyleRanges(const gfx::StyleRanges& style_ranges, size_t length) {
   if (length == 0) {
     DCHECK(style_ranges.empty()) << "Style ranges exist for empty text.";
     return;
   }
@@ skipping 335 matching lines @@
 
 const Font& RenderText::GetFont() const {
   return font_list_.GetFonts()[0];
 }
 
 void RenderText::ToggleInsertMode() {
   insert_mode_ = !insert_mode_;
   cached_bounds_and_offset_valid_ = false;
 }
 
+void RenderText::SetObscured(bool obscured) {
+  if (obscured != obscured_) {
+    obscured_ = obscured;
+    cached_bounds_and_offset_valid_ = false;
+    UpdateLayout();
+  }
+}
+
 void RenderText::SetDisplayRect(const Rect& r) {
   display_rect_ = r;
   cached_bounds_and_offset_valid_ = false;
   UpdateLayout();
 }
 
 size_t RenderText::GetCursorPosition() const {
   return selection_model_.selection_end();
 }
 
@@ skipping 103 matching lines @@
   SetSelectionModel(sel);
 }
 
 void RenderText::SelectAll() {
   SelectionModel sel = EdgeSelectionModel(CURSOR_RIGHT);
   sel.set_selection_start(EdgeSelectionModel(CURSOR_LEFT).selection_start());
   SetSelectionModel(sel);
 }
 
 void RenderText::SelectWord() {
+  if (obscured_) {
+    SelectAll();
+    return;
+  }
+
   size_t cursor_position = GetCursorPosition();
 
   base::i18n::BreakIterator iter(text(), base::i18n::BreakIterator::BREAK_WORD);
   bool success = iter.Init();
   DCHECK(success);
   if (!success)
     return;
 
   size_t selection_start = cursor_position;
   for (; selection_start != 0; --selection_start) {
@@ skipping 99 matching lines @@
 }
 
 RenderText::RenderText()
     : horizontal_alignment_(base::i18n::IsRTL() ? ALIGN_RIGHT : ALIGN_LEFT),
       cursor_enabled_(true),
       cursor_visible_(false),
       insert_mode_(true),
       cursor_color_(kDefaultCursorColor),
       focused_(false),
       composition_range_(ui::Range::InvalidRange()),
+      obscured_(false),
       fade_head_(false),
       fade_tail_(false),
       background_is_transparent_(false),
       cached_bounds_and_offset_valid_(false) {
 }
 
 const Point& RenderText::GetUpdatedDisplayOffset() {
   UpdateCachedBoundsAndOffset();
   return display_offset_;
 }
@@ skipping 17 matching lines @@
   selection_model_.set_selection_start(model.selection_start());
   DCHECK_LE(model.selection_end(), text().length());
   selection_model_.set_selection_end(model.selection_end());
   DCHECK_LT(model.caret_pos(), std::max<size_t>(text().length(), 1));
   selection_model_.set_caret_pos(model.caret_pos());
   selection_model_.set_caret_placement(model.caret_placement());
 
   cached_bounds_and_offset_valid_ = false;
 }
 
+string16 RenderText::GetDisplayText() const {
+  if (!obscured_)
+    return text_;
+  size_t obscured_text_length =
+      static_cast<size_t>(ui::UTF16IndexToOffset(text_, 0, text_.length()));
+  return string16(obscured_text_length, kPasswordReplacementChar);
+}
+
 void RenderText::ApplyCompositionAndSelectionStyles(
     StyleRanges* style_ranges) {
   // TODO(msw): This pattern ought to be reconsidered; what about composition
   //            and selection overlaps, retain existing local style features?
   // Apply a composition style override to a copy of the style ranges.
   if (composition_range_.IsValid() && !composition_range_.is_empty()) {
     StyleRange composition_style(default_style_);
     composition_style.underline = true;
     composition_style.range.set_start(composition_range_.start());
     composition_style.range.set_end(composition_range_.end());
@@ skipping 191 matching lines @@
   if (cursor_enabled() && cursor_visible() && focused()) {
     const Rect& bounds = GetUpdatedCursorBounds();
     if (bounds.width() != 0)
       canvas->FillRect(bounds, cursor_color_);
     else
       canvas->DrawRect(bounds, cursor_color_);
   }
 }
 
 }  // namespace gfx