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/*
* Copyright (C) 2007, 2008 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "DragImage.h"
#include "CachedImage.h"
#include "Font.h"
#include "FontDescription.h"
#include "FontSelector.h"
#include "Frame.h"
#include "GraphicsContext.h"
#include "Image.h"
#include "RetainPtr.h"
#include "Settings.h"
#include "StringTruncator.h"
#include "TextRun.h"
#include "WebCoreTextRenderer.h"
#include <windows.h>
namespace WebCore {
HBITMAP allocImage(HDC, IntSize, PlatformGraphicsContext** targetRef);
void deallocContext(PlatformGraphicsContext* target);
IntSize dragImageSize(DragImageRef image)
{
if (!image)
return IntSize();
BITMAP b;
GetObject(image, sizeof(BITMAP), &b);
return IntSize(b.bmWidth, b.bmHeight);
}
void deleteDragImage(DragImageRef image)
{
if (image)
::DeleteObject(image);
}
DragImageRef dissolveDragImageToFraction(DragImageRef image, float)
{
//We don't do this on windows as the dragimage is blended by the OS
return image;
}
DragImageRef createDragImageIconForCachedImage(CachedImage* image)
{
if (!image)
return 0;
String filename = image->response().suggestedFilename();
SHFILEINFO shfi = {0};
if (FAILED(SHGetFileInfo(static_cast<LPCWSTR>(filename.charactersWithNullTermination()), FILE_ATTRIBUTE_NORMAL,
&shfi, sizeof(shfi), SHGFI_ICON | SHGFI_USEFILEATTRIBUTES)))
return 0;
ICONINFO iconInfo;
if (!GetIconInfo(shfi.hIcon, &iconInfo)) {
DestroyIcon(shfi.hIcon);
return 0;
}
DestroyIcon(shfi.hIcon);
DeleteObject(iconInfo.hbmMask);
return iconInfo.hbmColor;
}
const float DragLabelBorderX = 4;
// Keep border_y in synch with DragController::LinkDragBorderInset.
const float DragLabelBorderY = 2;
const float DragLabelRadius = 5;
const float LabelBorderYOffset = 2;
const float MinDragLabelWidthBeforeClip = 120;
const float MaxDragLabelWidth = 200;
const float MaxDragLabelStringWidth = (MaxDragLabelWidth - 2 * DragLabelBorderX);
const float DragLinkLabelFontsize = 11;
const float DragLinkUrlFontSize = 10;
static Font dragLabelFont(int size, bool bold, FontRenderingMode renderingMode)
{
NONCLIENTMETRICS metrics;
metrics.cbSize = sizeof(metrics);
SystemParametersInfo(SPI_GETNONCLIENTMETRICS, metrics.cbSize, &metrics, 0);
FontDescription description;
description.setWeight(bold ? FontWeightBold : FontWeightNormal);
FontFamily family;
family.setFamily(metrics.lfSmCaptionFont.lfFaceName);
description.setFamily(family);
description.setSpecifiedSize((float)size);
description.setComputedSize((float)size);
description.setRenderingMode(renderingMode);
Font result = Font(description, 0, 0);
result.update(0);
return result;
}
DragImageRef createDragImageForLink(KURL& url, const String& inLabel, Frame* frame)
{
// This is more or less an exact match for the Mac OS X code.
const Font* labelFont;
const Font* urlFont;
if (frame->settings() && frame->settings()->fontRenderingMode() == AlternateRenderingMode) {
static const Font alternateRenderingModeLabelFont = dragLabelFont(DragLinkLabelFontsize, true, AlternateRenderingMode);
static const Font alternateRenderingModeURLFont = dragLabelFont(DragLinkUrlFontSize, false, AlternateRenderingMode);
labelFont = &alternateRenderingModeLabelFont;
urlFont = &alternateRenderingModeURLFont;
} else {
static const Font normalRenderingModeLabelFont = dragLabelFont(DragLinkLabelFontsize, true, NormalRenderingMode);
static const Font normalRenderingModeURLFont = dragLabelFont(DragLinkUrlFontSize, false, NormalRenderingMode);
labelFont = &normalRenderingModeLabelFont;
urlFont = &normalRenderingModeURLFont;
}
bool drawURLString = true;
bool clipURLString = false;
bool clipLabelString = false;
String urlString = url.string();
String label = inLabel;
if (label.isEmpty()) {
drawURLString = false;
label = urlString;
}
// First step in drawing the link drag image width.
TextRun labelRun(label.impl());
TextRun urlRun(urlString.impl());
IntSize labelSize(labelFont->width(labelRun), labelFont->fontMetrics().ascent() + labelFont->fontMetrics().descent());
if (labelSize.width() > MaxDragLabelStringWidth) {
labelSize.setWidth(MaxDragLabelStringWidth);
clipLabelString = true;
}
IntSize urlStringSize;
IntSize imageSize(labelSize.width() + DragLabelBorderX * 2, labelSize.height() + DragLabelBorderY * 2);
if (drawURLString) {
urlStringSize.setWidth(urlFont->width(urlRun));
urlStringSize.setHeight(urlFont->fontMetrics().ascent() + urlFont->fontMetrics().descent());
imageSize.setHeight(imageSize.height() + urlStringSize.height());
if (urlStringSize.width() > MaxDragLabelStringWidth) {
imageSize.setWidth(MaxDragLabelWidth);
clipURLString = true;
} else
imageSize.setWidth(std::max(labelSize.width(), urlStringSize.width()) + DragLabelBorderX * 2);
}
// We now know how big the image needs to be, so we create and
// fill the background
HBITMAP image = 0;
HDC dc = GetDC(0);
HDC workingDC = CreateCompatibleDC(dc);
if (!workingDC) {
ReleaseDC(0, dc);
return 0;
}
PlatformGraphicsContext* contextRef;
image = allocImage(workingDC, imageSize, &contextRef);
if (!image) {
DeleteDC(workingDC);
ReleaseDC(0, dc);
return 0;
}
SelectObject(workingDC, image);
GraphicsContext context(contextRef);
// On Mac alpha is {0.7, 0.7, 0.7, 0.8}, however we can't control alpha
// for drag images on win, so we use 1
static const Color backgroundColor(140, 140, 140);
static const IntSize radii(DragLabelRadius, DragLabelRadius);
IntRect rect(0, 0, imageSize.width(), imageSize.height());
context.fillRoundedRect(rect, radii, radii, radii, radii, backgroundColor, ColorSpaceDeviceRGB);
// Draw the text
static const Color topColor(0, 0, 0, 255); // original alpha = 0.75
static const Color bottomColor(255, 255, 255, 127); // original alpha = 0.5
if (drawURLString) {
if (clipURLString)
urlString = StringTruncator::rightTruncate(urlString, imageSize.width() - (DragLabelBorderX * 2.0f), *urlFont, false);
IntPoint textPos(DragLabelBorderX, imageSize.height() - (LabelBorderYOffset + urlFont->fontMetrics().descent()));
WebCoreDrawDoubledTextAtPoint(context, urlString, textPos, *urlFont, topColor, bottomColor);
}
if (clipLabelString)
label = StringTruncator::rightTruncate(label, imageSize.width() - (DragLabelBorderX * 2.0f), *labelFont, false);
IntPoint textPos(DragLabelBorderX, DragLabelBorderY + labelFont->pixelSize());
WebCoreDrawDoubledTextAtPoint(context, label, textPos, *labelFont, topColor, bottomColor);
deallocContext(contextRef);
DeleteDC(workingDC);
ReleaseDC(0, dc);
return image;
}
}
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