MacViews: Implement Force Touch/Mac dictionary lookup for Textfields.

ui/gfx/render_text_mac.mm

 // 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_mac.h"
 
 #import <AppKit/AppKit.h>
 #include <ApplicationServices/ApplicationServices.h>
 #include <CoreText/CoreText.h>
 
 #include <algorithm>
 #include <cmath>
 #include <utility>
 
 #include "base/mac/foundation_util.h"
 #include "base/mac/mac_util.h"
 #include "base/mac/scoped_cftyperef.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/sys_string_conversions.h"
 #include "skia/ext/skia_utils_mac.h"
 #include "third_party/skia/include/ports/SkTypeface_mac.h"

[tapted, 2016/09/21 04:06:56]

remove?

[karandeepb, 2016/09/22 08:17:39]

Removed render_text_harfbuzz_mac.mm. So this is no longer relevant.

 
 namespace {
 
 // This function makes a copy of |font| with the given symbolic traits. On OSX
 // 10.11, CTFontCreateCopyWithSymbolicTraits has the right behavior but
 // CTFontCreateWithFontDescriptor does not. The opposite holds true for OSX
 // 10.10.
 base::ScopedCFTypeRef<CTFontRef> CopyFontWithSymbolicTraits(CTFontRef font,
                                                             int sym_traits) {
   if (base::mac::IsAtLeastOS10_11()) {
@@ skipping 24 matching lines @@
   base::ScopedCFTypeRef<CTFontDescriptorRef> desc(
       CTFontDescriptorCreateWithAttributes(attributes));
   return base::ScopedCFTypeRef<CTFontRef>(
       CTFontCreateWithFontDescriptor(desc, 0.0, nullptr));
 }
 
 }  // namespace
 
 namespace gfx {
 
-namespace internal {
-
-// Note: this is only used by RenderTextHarfbuzz.
-sk_sp<SkTypeface> CreateSkiaTypeface(const Font& font,
-                                     bool italic,
-                                     Font::Weight weight) {
-  const Font::FontStyle style = italic ? Font::ITALIC : Font::NORMAL;
-  Font font_with_style = font.Derive(0, style, weight);
-  if (!font_with_style.GetNativeFont())
-    return nullptr;
-
-  return sk_sp<SkTypeface>(SkCreateTypefaceFromCTFont(
-      base::mac::NSToCFCast(font_with_style.GetNativeFont())));
-}
-
-}  // namespace internal
-
 RenderTextMac::RenderTextMac() : common_baseline_(0), runs_valid_(false) {}
 
 RenderTextMac::~RenderTextMac() {}
 
 std::unique_ptr<RenderText> RenderTextMac::CreateInstanceOfSameType() const {
   return base::WrapUnique(new RenderTextMac);
 }
 
 bool RenderTextMac::MultilineSupported() const {
   return false;
@@ skipping 347 matching lines @@
   runs_valid_ = true;
 }
 
 void RenderTextMac::InvalidateStyle() {
   line_.reset();
   attributes_.reset();
   runs_.clear();
   runs_valid_ = false;
 }
 
+bool RenderTextMac::GetStyledStringForRange(
+    const Range& range,
+    NSMutableAttributedString* str) const {
+  // TODO(karandeepb): This is not invoked on any codepath currently. Style the
+  // returned string if need be.
+  if (obscured())
+    return false;
+
+  [[str mutableString]
+      setString:base::SysUTF16ToNSString(GetTextFromRange(range))];
+  return true;
+}
+
 }  // namespace gfx