1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/editor/libeditor/base/nsEditorUtils.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,229 @@
1.4 +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
1.5 +/* This Source Code Form is subject to the terms of the Mozilla Public
1.6 + * License, v. 2.0. If a copy of the MPL was not distributed with this
1.7 + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
1.8 +
1.9 +#include "mozilla/dom/Selection.h"
1.10 +#include "nsCOMArray.h"
1.11 +#include "nsComponentManagerUtils.h"
1.12 +#include "nsEditorUtils.h"
1.13 +#include "nsError.h"
1.14 +#include "nsIClipboardDragDropHookList.h"
1.15 +// hooks
1.16 +#include "nsIClipboardDragDropHooks.h"
1.17 +#include "nsIContent.h"
1.18 +#include "nsIContentIterator.h"
1.19 +#include "nsIDOMDocument.h"
1.20 +#include "nsIDocShell.h"
1.21 +#include "nsIDocument.h"
1.22 +#include "nsIInterfaceRequestorUtils.h"
1.23 +#include "nsINode.h"
1.24 +#include "nsISimpleEnumerator.h"
1.25 +
1.26 +class nsIDOMRange;
1.27 +class nsISupports;
1.28 +
1.29 +using namespace mozilla;
1.30 +using namespace mozilla::dom;
1.31 +
1.32 +/******************************************************************************
1.33 + * nsAutoSelectionReset
1.34 + *****************************************************************************/
1.35 +
1.36 +nsAutoSelectionReset::nsAutoSelectionReset(Selection* aSel, nsEditor* aEd)
1.37 + : mSel(nullptr), mEd(nullptr)
1.38 +{
1.39 + if (!aSel || !aEd) return; // not much we can do, bail.
1.40 + if (aEd->ArePreservingSelection()) return; // we already have initted mSavedSel, so this must be nested call.
1.41 + mSel = aSel;
1.42 + mEd = aEd;
1.43 + if (mSel)
1.44 + {
1.45 + mEd->PreserveSelectionAcrossActions(mSel);
1.46 + }
1.47 +}
1.48 +
1.49 +nsAutoSelectionReset::~nsAutoSelectionReset()
1.50 +{
1.51 + NS_ASSERTION(!mSel || mEd, "mEd should be non-null when mSel is");
1.52 + if (mSel && mEd->ArePreservingSelection()) // mSel will be null if this was nested call
1.53 + {
1.54 + mEd->RestorePreservedSelection(mSel);
1.55 + }
1.56 +}
1.57 +
1.58 +void
1.59 +nsAutoSelectionReset::Abort()
1.60 +{
1.61 + NS_ASSERTION(!mSel || mEd, "mEd should be non-null when mSel is");
1.62 + if (mSel)
1.63 + mEd->StopPreservingSelection();
1.64 +}
1.65 +
1.66 +
1.67 +/******************************************************************************
1.68 + * some helper classes for iterating the dom tree
1.69 + *****************************************************************************/
1.70 +
1.71 +nsDOMIterator::nsDOMIterator() :
1.72 +mIter(nullptr)
1.73 +{
1.74 +}
1.75 +
1.76 +nsDOMIterator::~nsDOMIterator()
1.77 +{
1.78 +}
1.79 +
1.80 +nsresult
1.81 +nsDOMIterator::Init(nsIDOMRange* aRange)
1.82 +{
1.83 + nsresult res;
1.84 + mIter = do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &res);
1.85 + NS_ENSURE_SUCCESS(res, res);
1.86 + NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE);
1.87 + return mIter->Init(aRange);
1.88 +}
1.89 +
1.90 +nsresult
1.91 +nsDOMIterator::Init(nsIDOMNode* aNode)
1.92 +{
1.93 + nsresult res;
1.94 + mIter = do_CreateInstance("@mozilla.org/content/post-content-iterator;1", &res);
1.95 + NS_ENSURE_SUCCESS(res, res);
1.96 + NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE);
1.97 + nsCOMPtr<nsIContent> content = do_QueryInterface(aNode);
1.98 + return mIter->Init(content);
1.99 +}
1.100 +
1.101 +nsresult
1.102 +nsDOMIterator::AppendList(nsBoolDomIterFunctor& functor,
1.103 + nsCOMArray<nsIDOMNode>& arrayOfNodes) const
1.104 +{
1.105 + nsCOMPtr<nsIDOMNode> node;
1.106 +
1.107 + // iterate through dom and build list
1.108 + while (!mIter->IsDone())
1.109 + {
1.110 + node = do_QueryInterface(mIter->GetCurrentNode());
1.111 + NS_ENSURE_TRUE(node, NS_ERROR_NULL_POINTER);
1.112 +
1.113 + if (functor(node))
1.114 + {
1.115 + arrayOfNodes.AppendObject(node);
1.116 + }
1.117 + mIter->Next();
1.118 + }
1.119 + return NS_OK;
1.120 +}
1.121 +
1.122 +nsDOMSubtreeIterator::nsDOMSubtreeIterator()
1.123 +{
1.124 +}
1.125 +
1.126 +nsDOMSubtreeIterator::~nsDOMSubtreeIterator()
1.127 +{
1.128 +}
1.129 +
1.130 +nsresult
1.131 +nsDOMSubtreeIterator::Init(nsIDOMRange* aRange)
1.132 +{
1.133 + nsresult res;
1.134 + mIter = do_CreateInstance("@mozilla.org/content/subtree-content-iterator;1", &res);
1.135 + NS_ENSURE_SUCCESS(res, res);
1.136 + NS_ENSURE_TRUE(mIter, NS_ERROR_FAILURE);
1.137 + return mIter->Init(aRange);
1.138 +}
1.139 +
1.140 +/******************************************************************************
1.141 + * some general purpose editor utils
1.142 + *****************************************************************************/
1.143 +
1.144 +bool
1.145 +nsEditorUtils::IsDescendantOf(nsIDOMNode *aNode, nsIDOMNode *aParent, int32_t *aOffset)
1.146 +{
1.147 + NS_ENSURE_TRUE(aNode || aParent, false);
1.148 + if (aNode == aParent) return false;
1.149 +
1.150 + nsCOMPtr<nsIDOMNode> parent, node = do_QueryInterface(aNode);
1.151 + nsresult res;
1.152 +
1.153 + do
1.154 + {
1.155 + res = node->GetParentNode(getter_AddRefs(parent));
1.156 + NS_ENSURE_SUCCESS(res, false);
1.157 + if (parent == aParent)
1.158 + {
1.159 + if (aOffset)
1.160 + {
1.161 + nsCOMPtr<nsIContent> pCon(do_QueryInterface(parent));
1.162 + nsCOMPtr<nsIContent> cCon(do_QueryInterface(node));
1.163 + if (pCon)
1.164 + {
1.165 + *aOffset = pCon->IndexOf(cCon);
1.166 + }
1.167 + }
1.168 + return true;
1.169 + }
1.170 + node = parent;
1.171 + } while (parent);
1.172 +
1.173 + return false;
1.174 +}
1.175 +
1.176 +bool
1.177 +nsEditorUtils::IsLeafNode(nsIDOMNode *aNode)
1.178 +{
1.179 + bool hasChildren = false;
1.180 + if (aNode)
1.181 + aNode->HasChildNodes(&hasChildren);
1.182 + return !hasChildren;
1.183 +}
1.184 +
1.185 +/******************************************************************************
1.186 + * utility methods for drag/drop/copy/paste hooks
1.187 + *****************************************************************************/
1.188 +
1.189 +nsresult
1.190 +nsEditorHookUtils::GetHookEnumeratorFromDocument(nsIDOMDocument *aDoc,
1.191 + nsISimpleEnumerator **aResult)
1.192 +{
1.193 + nsCOMPtr<nsIDocument> doc = do_QueryInterface(aDoc);
1.194 + NS_ENSURE_TRUE(doc, NS_ERROR_FAILURE);
1.195 +
1.196 + nsCOMPtr<nsIDocShell> docShell = doc->GetDocShell();
1.197 + nsCOMPtr<nsIClipboardDragDropHookList> hookObj = do_GetInterface(docShell);
1.198 + NS_ENSURE_TRUE(hookObj, NS_ERROR_FAILURE);
1.199 +
1.200 + return hookObj->GetHookEnumerator(aResult);
1.201 +}
1.202 +
1.203 +bool
1.204 +nsEditorHookUtils::DoInsertionHook(nsIDOMDocument *aDoc, nsIDOMEvent *aDropEvent,
1.205 + nsITransferable *aTrans)
1.206 +{
1.207 + nsCOMPtr<nsISimpleEnumerator> enumerator;
1.208 + GetHookEnumeratorFromDocument(aDoc, getter_AddRefs(enumerator));
1.209 + NS_ENSURE_TRUE(enumerator, true);
1.210 +
1.211 + bool hasMoreHooks = false;
1.212 + while (NS_SUCCEEDED(enumerator->HasMoreElements(&hasMoreHooks)) && hasMoreHooks)
1.213 + {
1.214 + nsCOMPtr<nsISupports> isupp;
1.215 + if (NS_FAILED(enumerator->GetNext(getter_AddRefs(isupp))))
1.216 + break;
1.217 +
1.218 + nsCOMPtr<nsIClipboardDragDropHooks> override = do_QueryInterface(isupp);
1.219 + if (override)
1.220 + {
1.221 + bool doInsert = true;
1.222 +#ifdef DEBUG
1.223 + nsresult hookResult =
1.224 +#endif
1.225 + override->OnPasteOrDrop(aDropEvent, aTrans, &doInsert);
1.226 + NS_ASSERTION(NS_SUCCEEDED(hookResult), "hook failure in OnPasteOrDrop");
1.227 + NS_ENSURE_TRUE(doInsert, false);
1.228 + }
1.229 + }
1.230 +
1.231 + return true;
1.232 +}
