1 /*
2 * Copyright (C) 2007 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "config.h"
27 #include "WebDropSource.h"
28
29 #include "WebKitDLL.h"
30 #include "WebView.h"
31
32 #include <WebCore/Cursor.h>
33 #include <WebCore/DragActions.h>
34 #include <WebCore/EventHandler.h>
35 #include <WebCore/Frame.h>
36 #include <WebCore/FrameView.h>
37 #include <WebCore/Page.h>
38 #include <WebCore/PlatformMouseEvent.h>
39 #include <wtf/CurrentTime.h>
40
41 #include <Windows.h>
42
43 using namespace WebCore;
44
45
createInstance(WebView * webView,IDropSource ** result)46 HRESULT WebDropSource::createInstance(WebView* webView, IDropSource** result)
47 {
48 if (!webView || !result)
49 return E_INVALIDARG;
50 *result = new WebDropSource(webView);
51 return S_OK;
52 }
53
WebDropSource(WebView * webView)54 WebDropSource::WebDropSource(WebView* webView)
55 : m_ref(1)
56 , m_dropped(false)
57 , m_webView(webView)
58 {
59 gClassCount++;
60 gClassNameCount.add("WebDropSource");
61 }
62
~WebDropSource()63 WebDropSource::~WebDropSource()
64 {
65 gClassCount--;
66 gClassNameCount.remove("WebDropSource");
67 }
68
QueryInterface(REFIID riid,void ** ppvObject)69 STDMETHODIMP WebDropSource::QueryInterface(REFIID riid, void** ppvObject)
70 {
71 *ppvObject = 0;
72 if (IsEqualIID(riid, IID_IUnknown) ||
73 IsEqualIID(riid, IID_IDropSource)) {
74 *ppvObject = this;
75 AddRef();
76
77 return S_OK;
78 }
79
80 return E_NOINTERFACE;
81 }
82
STDMETHODIMP_(ULONG)83 STDMETHODIMP_(ULONG) WebDropSource::AddRef(void)
84 {
85 return InterlockedIncrement(&m_ref);
86 }
87
STDMETHODIMP_(ULONG)88 STDMETHODIMP_(ULONG) WebDropSource::Release(void)
89 {
90 long c = InterlockedDecrement(&m_ref);
91 if (c == 0)
92 delete this;
93 return c;
94 }
95
generateMouseEvent(WebView * webView,bool isDrag)96 PlatformMouseEvent generateMouseEvent(WebView* webView, bool isDrag) {
97 POINTL pt;
98 ::GetCursorPos((LPPOINT)&pt);
99 POINTL localpt = pt;
100 HWND viewWindow;
101 if (SUCCEEDED(webView->viewWindow((OLE_HANDLE*)&viewWindow)))
102 ::ScreenToClient(viewWindow, (LPPOINT)&localpt);
103 return PlatformMouseEvent(IntPoint(localpt.x, localpt.y), IntPoint(pt.x, pt.y),
104 isDrag ? LeftButton : NoButton, MouseEventMoved, 0, false, false, false, false, currentTime());
105 }
106
QueryContinueDrag(BOOL fEscapePressed,DWORD grfKeyState)107 STDMETHODIMP WebDropSource::QueryContinueDrag(BOOL fEscapePressed, DWORD grfKeyState)
108 {
109 if (fEscapePressed || !(grfKeyState & (MK_LBUTTON|MK_RBUTTON))) {
110 m_dropped = !fEscapePressed;
111 return fEscapePressed? DRAGDROP_S_CANCEL : DRAGDROP_S_DROP;
112 }
113
114 return S_OK;
115 }
116
GiveFeedback(DWORD dwEffect)117 STDMETHODIMP WebDropSource::GiveFeedback(DWORD dwEffect)
118 {
119 BOOL showCustomCursors;
120 if (FAILED(WebPreferences::sharedStandardPreferences()->customDragCursorsEnabled(&showCustomCursors)))
121 return DRAGDROP_S_USEDEFAULTCURSORS;
122
123 // If we don't want to hide the stop icon, let Windows select the cursor.
124 if (!showCustomCursors)
125 return DRAGDROP_S_USEDEFAULTCURSORS;
126
127 // If we are going to show something other than the not allowed arrow, then let Windows
128 // show the cursor.
129 if (dwEffect != DROPEFFECT_NONE)
130 return DRAGDROP_S_USEDEFAULTCURSORS;
131
132 HWND viewWindow;
133 if (FAILED(m_webView->viewWindow(reinterpret_cast<OLE_HANDLE*>(&viewWindow))))
134 return DRAGDROP_S_USEDEFAULTCURSORS;
135
136 RECT webViewRect;
137 GetWindowRect(viewWindow, &webViewRect);
138
139 POINT cursorPoint;
140 GetCursorPos(&cursorPoint);
141
142 if (!PtInRect(&webViewRect, cursorPoint)) {
143 // If our cursor is outside the bounds of the webView, we want to let Windows select the cursor.
144 return DRAGDROP_S_USEDEFAULTCURSORS;
145 }
146
147 FrameView* view = m_webView->page()->mainFrame()->view();
148 if (!view)
149 return DRAGDROP_S_USEDEFAULTCURSORS;
150
151 // When dragging inside a WebView and the drag is not allowed, don't show the not allowed icon,
152 // instead, show the pointer cursor.
153 // FIXME <rdar://7577595>: Custom cursors aren't supported during drag and drop (default to pointer).
154 view->setCursor(pointerCursor());
155 return S_OK;
156 }
157