15821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Copyright (c) 2012 The Chromium Authors. All rights reserved. 25821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Use of this source code is governed by a BSD-style license that can be 35821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// found in the LICENSE file. 45821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 55821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/base/dragdrop/drag_utils.h" 65821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 71320f92c476a1ad9d19dba2a48c72b75566198e9Primiano Tucci#include "base/files/file_util.h" 85821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "base/logging.h" 9868fa2fe829687343ffae624259930155e16dbd8Torne (Richard Coles)#include "base/strings/utf_string_conversions.h" 105821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/base/dragdrop/os_exchange_data.h" 115821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/canvas.h" 125d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "ui/gfx/font_list.h" 135d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "ui/gfx/geometry/point.h" 145d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "ui/gfx/geometry/rect.h" 155d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles)#include "ui/gfx/geometry/size.h" 165821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#include "ui/gfx/image/canvas_image_source.h" 17eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch#include "url/gurl.h" 185821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 195821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace drag_utils { 205821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 215821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)namespace { 225821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 235821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// Maximum width of the link drag image in pixels. 245821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const int kLinkDragImageVPadding = 3; 255821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 265821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)// File dragging pixel measurements 275821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const int kFileDragImageMaxWidth = 200; 285821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)static const SkColor kFileDragImageTextColor = SK_ColorBLACK; 295821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 305821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)class FileDragImageSource : public gfx::CanvasImageSource { 315821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) public: 322a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) FileDragImageSource(const base::FilePath& file_name, 332a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const gfx::ImageSkia& icon) 345821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) : CanvasImageSource(CalculateSize(icon), false), 355821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) file_name_(file_name), 365821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) icon_(icon) { 375821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 385821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 395821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual ~FileDragImageSource() { 405821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 415821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 425821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Overridden from gfx::CanvasImageSource. 435821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) virtual void Draw(gfx::Canvas* canvas) OVERRIDE { 44effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch if (!icon_.isNull()) { 45effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch // Paint the icon. 46effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch canvas->DrawImageInt(icon_, (size().width() - icon_.width()) / 2, 0); 47effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch } 485821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 49eb525c5499e34cc9c4b825d6d9e75bb07cc06aceBen Murdoch base::string16 name = file_name_.BaseName().LossyDisplayName(); 505821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int flags = gfx::Canvas::TEXT_ALIGN_CENTER; 515d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const gfx::FontList font_list; 525821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#if defined(OS_WIN) 535821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Paint the file name. We inset it one pixel to allow room for the halo. 545d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const gfx::Rect rect(1, icon_.height() + kLinkDragImageVPadding + 1, 555d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) size().width() - 2, font_list.GetHeight()); 565d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) canvas->DrawStringRectWithHalo(name, font_list, kFileDragImageTextColor, 575d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) SK_ColorWHITE, rect, flags); 585821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#else 595821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // NO_SUBPIXEL_RENDERING is required when drawing to a non-opaque canvas. 605d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const gfx::Rect rect(0, icon_.height() + kLinkDragImageVPadding, 615d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) size().width(), font_list.GetHeight()); 625d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) canvas->DrawStringRectWithFlags(name, font_list, kFileDragImageTextColor, 635d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) rect, 645d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) flags | gfx::Canvas::NO_SUBPIXEL_RENDERING); 655821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)#endif 665821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 675821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 685821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) private: 695821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Size CalculateSize(const gfx::ImageSkia& icon) const { 705821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const int width = kFileDragImageMaxWidth; 715821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // Add +2 here to allow room for the halo. 725d1f7b1de12d16ceb2c938c56701a3e8bfa558f7Torne (Richard Coles) const int height = gfx::FontList().GetHeight() + icon.height() + 735821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) kLinkDragImageVPadding + 2; 745821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) return gfx::Size(width, height); 755821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) } 765821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 772a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles) const base::FilePath file_name_; 785821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const gfx::ImageSkia icon_; 795821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 805821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DISALLOW_COPY_AND_ASSIGN(FileDragImageSource); 815821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)}; 825821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 835821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace 845821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 852a99a7e74a7f215066514fe81d2bfa6639d9edddTorne (Richard Coles)void CreateDragImageForFile(const base::FilePath& file_name, 86effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch const gfx::ImageSkia& icon, 875821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ui::OSExchangeData* data_object) { 885821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) DCHECK(data_object); 89effb81e5f8246d0db0270817048dc992db66e9fbBen Murdoch gfx::CanvasImageSource* source = new FileDragImageSource(file_name, icon); 905821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Size size = source->size(); 915821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) // ImageSkia takes ownership of |source|. 925821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::ImageSkia image = gfx::ImageSkia(source, size); 935821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 945821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::Vector2d cursor_offset(size.width() / 2, kLinkDragImageVPadding); 95f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) SetDragImageOnDataObject(image, cursor_offset, data_object); 965821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 975821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 985821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)void SetDragImageOnDataObject(const gfx::Canvas& canvas, 995821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) const gfx::Vector2d& cursor_offset, 1005821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) ui::OSExchangeData* data_object) { 1015821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) gfx::ImageSkia image = gfx::ImageSkia(canvas.ExtractImageRep()); 102f8ee788a64d60abd8f2d742a5fdedde054ecd910Torne (Richard Coles) SetDragImageOnDataObject(image, cursor_offset, data_object); 1035821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} 1045821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles) 1055821806d5e7f356e8fa4b058a389a808ea183019Torne (Richard Coles)} // namespace drag_utils 106