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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "ui/base/dragdrop/drag_utils.h" | 5 #include "ui/base/dragdrop/drag_utils.h" |
6 | 6 |
7 #include "base/files/file_util.h" | |
8 #include "base/logging.h" | |
9 #include "base/macros.h" | |
10 #include "base/strings/utf_string_conversions.h" | |
11 #include "build/build_config.h" | |
12 #include "ui/base/dragdrop/os_exchange_data.h" | 7 #include "ui/base/dragdrop/os_exchange_data.h" |
13 #include "ui/gfx/canvas.h" | 8 #include "ui/gfx/canvas.h" |
14 #include "ui/gfx/font_list.h" | 9 #include "ui/gfx/image/image_skia.h" |
15 #include "ui/gfx/geometry/point.h" | |
16 #include "ui/gfx/geometry/rect.h" | |
17 #include "ui/gfx/geometry/size.h" | |
18 #include "ui/gfx/image/canvas_image_source.h" | |
19 #include "url/gurl.h" | |
20 | 10 |
21 namespace drag_utils { | 11 namespace drag_utils { |
22 | 12 |
23 namespace { | |
24 | |
25 // Maximum width of the link drag image in pixels. | |
26 static const int kLinkDragImageVPadding = 3; | |
27 | |
28 // File dragging pixel measurements | |
29 static const int kFileDragImageMaxWidth = 200; | |
30 static const SkColor kFileDragImageTextColor = SK_ColorBLACK; | |
31 | |
32 class FileDragImageSource : public gfx::CanvasImageSource { | |
33 public: | |
34 FileDragImageSource(const base::FilePath& file_name, | |
35 const gfx::ImageSkia& icon) | |
36 : CanvasImageSource(CalculateSize(icon), false), | |
37 file_name_(file_name), | |
38 icon_(icon) { | |
39 } | |
40 | |
41 ~FileDragImageSource() override {} | |
42 | |
43 // Overridden from gfx::CanvasImageSource. | |
44 void Draw(gfx::Canvas* canvas) override { | |
45 if (!icon_.isNull()) { | |
46 // Paint the icon. | |
47 canvas->DrawImageInt(icon_, (size().width() - icon_.width()) / 2, 0); | |
48 } | |
49 | |
50 base::string16 name = file_name_.BaseName().LossyDisplayName(); | |
51 const int flags = gfx::Canvas::TEXT_ALIGN_CENTER; | |
52 const gfx::FontList font_list; | |
53 #if defined(OS_WIN) | |
54 // Paint the file name. We inset it one pixel to allow room for the halo. | |
55 const gfx::Rect rect(1, icon_.height() + kLinkDragImageVPadding + 1, | |
56 size().width() - 2, font_list.GetHeight()); | |
57 canvas->DrawStringRectWithHalo(name, font_list, kFileDragImageTextColor, | |
58 SK_ColorWHITE, rect, flags); | |
59 #else | |
60 // NO_SUBPIXEL_RENDERING is required when drawing to a non-opaque canvas. | |
61 const gfx::Rect rect(0, icon_.height() + kLinkDragImageVPadding, | |
62 size().width(), font_list.GetHeight()); | |
63 canvas->DrawStringRectWithFlags(name, font_list, kFileDragImageTextColor, | |
64 rect, | |
65 flags | gfx::Canvas::NO_SUBPIXEL_RENDERING); | |
66 #endif | |
67 } | |
68 | |
69 private: | |
70 gfx::Size CalculateSize(const gfx::ImageSkia& icon) const { | |
71 const int width = kFileDragImageMaxWidth; | |
72 // Add +2 here to allow room for the halo. | |
73 const int height = gfx::FontList().GetHeight() + icon.height() + | |
74 kLinkDragImageVPadding + 2; | |
75 return gfx::Size(width, height); | |
76 } | |
77 | |
78 const base::FilePath file_name_; | |
79 const gfx::ImageSkia icon_; | |
80 | |
81 DISALLOW_COPY_AND_ASSIGN(FileDragImageSource); | |
82 }; | |
83 | |
84 } // namespace | |
85 | |
86 void CreateDragImageForFile(const base::FilePath& file_name, | |
87 const gfx::ImageSkia& icon, | |
88 ui::OSExchangeData* data_object) { | |
89 DCHECK(data_object); | |
90 gfx::CanvasImageSource* source = new FileDragImageSource(file_name, icon); | |
91 gfx::Size size = source->size(); | |
92 // ImageSkia takes ownership of |source|. | |
93 gfx::ImageSkia image = gfx::ImageSkia(source, size); | |
94 | |
95 gfx::Vector2d cursor_offset(size.width() / 2, kLinkDragImageVPadding); | |
96 SetDragImageOnDataObject(image, cursor_offset, data_object); | |
97 } | |
98 | |
99 void SetDragImageOnDataObject(const gfx::Canvas& canvas, | 13 void SetDragImageOnDataObject(const gfx::Canvas& canvas, |
100 const gfx::Vector2d& cursor_offset, | 14 const gfx::Vector2d& cursor_offset, |
101 ui::OSExchangeData* data_object) { | 15 ui::OSExchangeData* data_object) { |
102 gfx::ImageSkia image = gfx::ImageSkia(canvas.ExtractImageRep()); | 16 gfx::ImageSkia image = gfx::ImageSkia(canvas.ExtractImageRep()); |
103 SetDragImageOnDataObject(image, cursor_offset, data_object); | 17 SetDragImageOnDataObject(image, cursor_offset, data_object); |
104 } | 18 } |
105 | 19 |
106 #if !defined(OS_WIN) | 20 #if !defined(OS_WIN) |
107 void SetDragImageOnDataObject(const gfx::ImageSkia& image_skia, | 21 void SetDragImageOnDataObject(const gfx::ImageSkia& image_skia, |
108 const gfx::Vector2d& cursor_offset, | 22 const gfx::Vector2d& cursor_offset, |
109 ui::OSExchangeData* data_object) { | 23 ui::OSExchangeData* data_object) { |
110 data_object->provider().SetDragImage(image_skia, cursor_offset); | 24 data_object->provider().SetDragImage(image_skia, cursor_offset); |
111 } | 25 } |
112 #endif | 26 #endif |
113 | 27 |
114 } // namespace drag_utils | 28 } // namespace drag_utils |
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