The Tor Browser / file comparison
comparison: editor/libeditor/base/nsEditorUtils.cpp
editor/libeditor/base/nsEditorUtils.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
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| -1:000000000000 | 0:ad99a2fdd20b |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #include "mozilla/dom/Selection.h" | |
| 7 #include "nsCOMArray.h" | |
| 8 #include "nsComponentManagerUtils.h" | |
| 9 #include "nsEditorUtils.h" | |
| 10 #include "nsError.h" | |
| 11 #include "nsIClipboardDragDropHookList.h" | |
| 12 // hooks | |
| 13 #include "nsIClipboardDragDropHooks.h" | |
| 14 #include "nsIContent.h" | |
| 15 #include "nsIContentIterator.h" | |
| 16 #include "nsIDOMDocument.h" | |
| 17 #include "nsIDocShell.h" | |
| 18 #include "nsIDocument.h" | |
| 19 #include "nsIInterfaceRequestorUtils.h" | |
| 20 #include "nsINode.h" | |
| 21 #include "nsISimpleEnumerator.h" | |
| 22 | |
| 23 class nsIDOMRange; | |
| 24 class nsISupports; | |
| 25 | |
| 26 using namespace mozilla; | |
| 27 using namespace mozilla::dom; | |
| 28 | |
| 29 /****************************************************************************** | |
| 30 * nsAutoSelectionReset | |
| 31 *****************************************************************************/ | |
| 32 | |
| 33 nsAutoSelectionReset::nsAutoSelectionReset(Selection* aSel, nsEditor* aEd) | |
| 34 : mSel(nullptr), mEd(nullptr) | |
| 35 { | |
| 36 if (!aSel || !aEd) return; // not much we can do, bail. | |
| 37 if (aEd->ArePreservingSelection()) return; // we already have initted mSavedSel, so this must be nested call. | |
| 38 mSel = aSel; | |
| 39 mEd = aEd; | |
| 40 if (mSel) | |
| 41 { | |
| 42 mEd->PreserveSelectionAcrossActions(mSel); | |
| 43 } | |
| 44 } | |
| 45 | |
| 46 nsAutoSelectionReset::~nsAutoSelectionReset() | |
| 47 { | |
| 48 NS_ASSERTION(!mSel || mEd, "mEd should be non-null when mSel is"); | |
| 49 if (mSel && mEd->ArePreservingSelection()) // mSel will be null if this was nested call | |
| 50 { | |
| 51 mEd->RestorePreservedSelection(mSel); | |
| 52 } | |
| 53 } | |
| 54 | |
| 55 void | |
| 56 nsAutoSelectionReset::Abort() | |
| 57 { | |
| 58 NS_ASSERTION(!mSel || mEd, "mEd should be non-null when mSel is"); | |
| 59 if (mSel) | |
| 60 mEd->StopPreservingSelection(); | |
| 61 } | |
| 62 | |
| 63 | |
| 64 /****************************************************************************** | |
| 65 * some helper classes for iterating the dom tree | |
| 66 *****************************************************************************/ | |
| 67 | |
| 68 nsDOMIterator::nsDOMIterator() : | |
| 69 mIter(nullptr) | |
| 70 { | |
| 71 } | |
| 72 | |
| 73 nsDOMIterator::~nsDOMIterator() | |
| 74 { | |
| 75 } | |
| 76 | |
| 77 nsresult | |
| 78 nsDOMIterator::Init(nsIDOMRange* aRange) | |
| 79 { | |
| 80 nsresult res; | |
| 81 mIter = do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &res); | |
| 82 NS_ENSURE_SUCCESS(res, res); | |
| 83 NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE); | |
| 84 return mIter->Init(aRange); | |
| 85 } | |
| 86 | |
| 87 nsresult | |
| 88 nsDOMIterator::Init(nsIDOMNode* aNode) | |
| 89 { | |
| 90 nsresult res; | |
| 91 mIter = do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &res); | |
| 92 NS_ENSURE_SUCCESS(res, res); | |
| 93 NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE); | |
| 94 nsCOMPtr<nsIContent> content = do_QueryInterface(aNode); | |
| 95 return mIter->Init(content); | |
| 96 } | |
| 97 | |
| 98 nsresult | |
| 99 nsDOMIterator::AppendList(nsBoolDomIterFunctor& functor, | |
| 100 nsCOMArray<nsIDOMNode>& arrayOfNodes) const | |
| 101 { | |
| 102 nsCOMPtr<nsIDOMNode> node; | |
| 103 | |
| 104 // iterate through dom and build list | |
| 105 while (!mIter->IsDone()) | |
| 106 { | |
| 107 node = do_QueryInterface(mIter->GetCurrentNode()); | |
| 108 NS_ENSURE_TRUE(node, NS_ERROR_NULL_POINTER); | |
| 109 | |
| 110 if (functor(node)) | |
| 111 { | |
| 112 arrayOfNodes.AppendObject(node); | |
| 113 } | |
| 114 mIter->Next(); | |
| 115 } | |
| 116 return NS_OK; | |
| 117 } | |
| 118 | |
| 119 nsDOMSubtreeIterator::nsDOMSubtreeIterator() | |
| 120 { | |
| 121 } | |
| 122 | |
| 123 nsDOMSubtreeIterator::~nsDOMSubtreeIterator() | |
| 124 { | |
| 125 } | |
| 126 | |
| 127 nsresult | |
| 128 nsDOMSubtreeIterator::Init(nsIDOMRange* aRange) | |
| 129 { | |
| 130 nsresult res; | |
| 131 mIter = do_CreateInstance("@mozilla.org/content/subtree-content-iterator;1", &res); | |
| 132 NS_ENSURE_SUCCESS(res, res); | |
| 133 NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE); | |
| 134 return mIter->Init(aRange); | |
| 135 } | |
| 136 | |
| 137 /****************************************************************************** | |
| 138 * some general purpose editor utils | |
| 139 *****************************************************************************/ | |
| 140 | |
| 141 bool | |
| 142 nsEditorUtils::IsDescendantOf(nsIDOMNode *aNode, nsIDOMNode *aParent, int32_t *aOffset) | |
| 143 { | |
| 144 NS_ENSURE_TRUE(aNode || aParent, false); | |
| 145 if (aNode == aParent) return false; | |
| 146 | |
| 147 nsCOMPtr<nsIDOMNode> parent, node = do_QueryInterface(aNode); | |
| 148 nsresult res; | |
| 149 | |
| 150 do | |
| 151 { | |
| 152 res = node->GetParentNode(getter_AddRefs(parent)); | |
| 153 NS_ENSURE_SUCCESS(res, false); | |
| 154 if (parent == aParent) | |
| 155 { | |
| 156 if (aOffset) | |
| 157 { | |
| 158 nsCOMPtr<nsIContent> pCon(do_QueryInterface(parent)); | |
| 159 nsCOMPtr<nsIContent> cCon(do_QueryInterface(node)); | |
| 160 if (pCon) | |
| 161 { | |
| 162 *aOffset = pCon->IndexOf(cCon); | |
| 163 } | |
| 164 } | |
| 165 return true; | |
| 166 } | |
| 167 node = parent; | |
| 168 } while (parent); | |
| 169 | |
| 170 return false; | |
| 171 } | |
| 172 | |
| 173 bool | |
| 174 nsEditorUtils::IsLeafNode(nsIDOMNode *aNode) | |
| 175 { | |
| 176 bool hasChildren = false; | |
| 177 if (aNode) | |
| 178 aNode->HasChildNodes(&hasChildren); | |
| 179 return !hasChildren; | |
| 180 } | |
| 181 | |
| 182 /****************************************************************************** | |
| 183 * utility methods for drag/drop/copy/paste hooks | |
| 184 *****************************************************************************/ | |
| 185 | |
| 186 nsresult | |
| 187 nsEditorHookUtils::GetHookEnumeratorFromDocument(nsIDOMDocument *aDoc, | |
| 188 nsISimpleEnumerator **aResult) | |
| 189 { | |
| 190 nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc); | |
| 191 NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE); | |
| 192 | |
| 193 nsCOMPtr<nsIDocShell> docShell = doc->GetDocShell(); | |
| 194 nsCOMPtr<nsIClipboardDragDropHookList> hookObj = do_GetInterface(docShell); | |
| 195 NS_ENSURE_TRUE(hookObj, NS_ERROR_FAILURE); | |
| 196 | |
| 197 return hookObj->GetHookEnumerator(aResult); | |
| 198 } | |
| 199 | |
| 200 bool | |
| 201 nsEditorHookUtils::DoInsertionHook(nsIDOMDocument *aDoc, nsIDOMEvent *aDropEvent, | |
| 202 nsITransferable *aTrans) | |
| 203 { | |
| 204 nsCOMPtr<nsISimpleEnumerator> enumerator; | |
| 205 GetHookEnumeratorFromDocument(aDoc, getter_AddRefs(enumerator)); | |
| 206 NS_ENSURE_TRUE(enumerator, true); | |
| 207 | |
| 208 bool hasMoreHooks = false; | |
| 209 while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks)) && hasMoreHooks) | |
| 210 { | |
| 211 nsCOMPtr<nsISupports> isupp; | |
| 212 if (NS_FAILED(enumerator->GetNext(getter_AddRefs(isupp)))) | |
| 213 break; | |
| 214 | |
| 215 nsCOMPtr<nsIClipboardDragDropHooks> override = do_QueryInterface(isupp); | |
| 216 if (override) | |
| 217 { | |
| 218 bool doInsert = true; | |
| 219 #ifdef DEBUG | |
| 220 nsresult hookResult = | |
| 221 #endif | |
| 222 override->OnPasteOrDrop(aDropEvent, aTrans, &doInsert); | |
| 223 NS_ASSERTION(NS_SUCCEEDED(hookResult), "hook failure in OnPasteOrDrop"); | |
| 224 NS_ENSURE_TRUE(doInsert, false); | |
| 225 } | |
| 226 } | |
| 227 | |
| 228 return true; | |
| 229 } |
