/* * Copyright (C) 2007 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 "WebDragClient.h" #include "WebDropSource.h" #include "WebKitGraphics.h" #include "WebView.h" #include #include #pragma warning(push, 0) #include #include #include #include #include #include #include #include #include #include #pragma warning(pop) namespace WebCore { HBITMAP allocImage(HDC dc, IntSize size, CGContextRef *targetRef); } #define DRAG_LABEL_BORDER_X 4 // Keep border_y in synch with DragController::LinkDragBorderInset #define DRAG_LABEL_BORDER_Y 2 #define DRAG_LABEL_RADIUS 5 #define DRAG_LABEL_BORDER_Y_OFFSET 2 #define MIN_DRAG_LABEL_WIDTH_BEFORE_CLIP 120 // Observation says max size is 200x200 #define MAX_DRAG_LABEL_WIDTH 200 #define MAX_DRAG_LABEL_STRING_WIDTH (MAX_DRAG_LABEL_WIDTH - 2 * DRAG_LABEL_BORDER_X) #define DRAG_LINK_LABEL_FONT_SIZE 11 #define DRAG_LINK_URL_FONT_SIZE 10 using namespace WebCore; WebDragClient::WebDragClient(WebView* webView) : m_webView(webView) { ASSERT(webView); } DragDestinationAction WebDragClient::actionMaskForDrag(DragData* dragData) { COMPtr delegateRef = 0; //Default behaviour (eg. no delegate, or callback not implemented) is to allow //any action WebDragDestinationAction mask = WebDragDestinationActionAny; if (SUCCEEDED(m_webView->uiDelegate(&delegateRef))) delegateRef->dragDestinationActionMaskForDraggingInfo(m_webView, dragData->platformData(), &mask); return (DragDestinationAction)mask; } void WebDragClient::willPerformDragDestinationAction(DragDestinationAction action, DragData* dragData) { //Default delegate for willPerformDragDestinationAction has no side effects //so we just call the delegate, and don't worry about whether it's implemented COMPtr delegateRef = 0; if (SUCCEEDED(m_webView->uiDelegate(&delegateRef))) delegateRef->willPerformDragDestinationAction(m_webView, (WebDragDestinationAction)action, dragData->platformData()); } DragSourceAction WebDragClient::dragSourceActionMaskForPoint(const IntPoint& windowPoint) { COMPtr delegateRef = 0; WebDragSourceAction action = WebDragSourceActionAny; POINT localpt = core(m_webView)->mainFrame()->view()->windowToContents(windowPoint); if (SUCCEEDED(m_webView->uiDelegate(&delegateRef))) delegateRef->dragSourceActionMaskForPoint(m_webView, &localpt, &action); return (DragSourceAction)action; } void WebDragClient::willPerformDragSourceAction(DragSourceAction, const IntPoint&, Clipboard*) { } void WebDragClient::startDrag(DragImageRef image, const IntPoint& imageOrigin, const IntPoint& dragPoint, Clipboard* clipboard, Frame* frame, bool isLink) { //FIXME: Allow UIDelegate to override behaviour //We liberally protect everything, to protect against a load occurring mid-drag RefPtr frameProtector = frame; COMPtr helper; COMPtr dataObject; COMPtr viewProtector = m_webView; COMPtr source; if (FAILED(WebDropSource::createInstance(m_webView, &source))) return; dataObject = static_cast(clipboard)->dataObject(); if (source && (image || dataObject)) { if (image) { if(SUCCEEDED(CoCreateInstance(CLSID_DragDropHelper, 0, CLSCTX_INPROC_SERVER, IID_IDragSourceHelper,(LPVOID*)&helper))) { BITMAP b; GetObject(image, sizeof(BITMAP), &b); SHDRAGIMAGE sdi; sdi.sizeDragImage.cx = b.bmWidth; sdi.sizeDragImage.cy = b.bmHeight; sdi.crColorKey = 0xffffffff; sdi.hbmpDragImage = image; sdi.ptOffset.x = dragPoint.x() - imageOrigin.x(); sdi.ptOffset.y = dragPoint.y() - imageOrigin.y(); if (isLink) sdi.ptOffset.y = b.bmHeight - sdi.ptOffset.y; helper->InitializeFromBitmap(&sdi, dataObject.get()); } } //FIXME: Ensure correct drag ops are available DWORD okEffect = DROPEFFECT_COPY | DROPEFFECT_LINK | DROPEFFECT_MOVE; DWORD effect; COMPtr ui; if (SUCCEEDED(m_webView->uiDelegate(&ui))) { COMPtr uiPrivate; if (SUCCEEDED(ui->QueryInterface(IID_IWebUIDelegatePrivate, (void**)&uiPrivate))) if (SUCCEEDED(uiPrivate->doDragDrop(m_webView, dataObject.get(), source.get(), okEffect, &effect))) return; } DoDragDrop(dataObject.get(), source.get(), okEffect, &effect); } } static Font dragLabelFont(int size, bool bold) { FontDescription desc; desc.setBold(bold); FontFamily family; family.setFamily("Lucida Grande"); desc.setFamily(family); desc.setSpecifiedSize((float)size); desc.setComputedSize((float)size); Font result = Font(desc, 0, 0); result.update(0); return result; } DragImageRef WebDragClient::createDragImageForLink(KURL& url, const String& inLabel, Frame*) { //This is more or less an exact match for the MacOS code static const Font labelFont = dragLabelFont(DRAG_LINK_LABEL_FONT_SIZE, true); static const Font urlFont = dragLabelFont(DRAG_LINK_URL_FONT_SIZE, false); 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.ascent() + labelFont.descent()); if (labelSize.width() > MAX_DRAG_LABEL_STRING_WIDTH){ labelSize.setWidth(MAX_DRAG_LABEL_STRING_WIDTH); clipLabelString = true; } IntSize urlStringSize; IntSize imageSize(labelSize.width() + DRAG_LABEL_BORDER_X * 2, labelSize.height() + DRAG_LABEL_BORDER_Y * 2); if (drawURLString) { urlStringSize.setWidth(urlFont.width(urlRun)); urlStringSize.setHeight(urlFont.ascent() + urlFont.descent()); imageSize.setHeight(imageSize.height() + urlStringSize.height()); if (urlStringSize.width() > MAX_DRAG_LABEL_STRING_WIDTH) { imageSize.setWidth(MAX_DRAG_LABEL_WIDTH); clipURLString = true; } else { imageSize.setWidth(std::max(labelSize.width(), urlStringSize.width()) + DRAG_LABEL_BORDER_X * 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; } CGContextRef 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(DRAG_LABEL_RADIUS, DRAG_LABEL_RADIUS); context.setFont(labelFont); IntRect rect(0, 0, imageSize.width(), imageSize.height()); context.fillRoundedRect(rect, radii, radii, radii, radii, backgroundColor); // 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() - (DRAG_LABEL_BORDER_X * 2.0f), urlFont, false); IntPoint textPos(DRAG_LABEL_BORDER_X, imageSize.height() - (DRAG_LABEL_BORDER_Y_OFFSET + urlFont.descent())); WebCoreDrawDoubledTextAtPoint(context, urlString, textPos, urlFont, topColor, bottomColor); } if (clipLabelString) label = StringTruncator::rightTruncate(label, imageSize.width() - (DRAG_LABEL_BORDER_X * 2.0f), labelFont, false); IntPoint textPos(DRAG_LABEL_BORDER_X, DRAG_LABEL_BORDER_Y + labelFont.pixelSize()); WebCoreDrawDoubledTextAtPoint(context, label, textPos, labelFont, topColor, bottomColor); CGContextRelease(contextRef); DeleteDC(workingDC); ReleaseDC(0, dc); return image; } void WebDragClient::dragControllerDestroyed() { delete this; }