The Tor Browser / file comparison
comparison: editor/libeditor/base/InsertTextTxn.cpp
editor/libeditor/base/InsertTextTxn.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
inserted
replaced
| -1:000000000000 | 0:1e696bcf6823 |
|---|---|
| 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 <stdio.h> // for printf | |
| 7 | |
| 8 #include "InsertTextTxn.h" | |
| 9 #include "nsAString.h" | |
| 10 #include "nsDebug.h" // for NS_ASSERTION, etc | |
| 11 #include "nsError.h" // for NS_OK, etc | |
| 12 #include "nsIDOMCharacterData.h" // for nsIDOMCharacterData | |
| 13 #include "nsIEditor.h" // for nsIEditor | |
| 14 #include "nsISelection.h" // for nsISelection | |
| 15 #include "nsISupportsUtils.h" // for NS_ADDREF_THIS, NS_RELEASE | |
| 16 #include "nsITransaction.h" // for nsITransaction | |
| 17 | |
| 18 InsertTextTxn::InsertTextTxn() | |
| 19 : EditTxn() | |
| 20 { | |
| 21 } | |
| 22 | |
| 23 NS_IMPL_CYCLE_COLLECTION_INHERITED(InsertTextTxn, EditTxn, | |
| 24 mElement) | |
| 25 | |
| 26 NS_IMPL_ADDREF_INHERITED(InsertTextTxn, EditTxn) | |
| 27 NS_IMPL_RELEASE_INHERITED(InsertTextTxn, EditTxn) | |
| 28 NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(InsertTextTxn) | |
| 29 if (aIID.Equals(InsertTextTxn::GetCID())) { | |
| 30 *aInstancePtr = (void*)(InsertTextTxn*)this; | |
| 31 NS_ADDREF_THIS(); | |
| 32 return NS_OK; | |
| 33 } else | |
| 34 NS_INTERFACE_MAP_END_INHERITING(EditTxn) | |
| 35 | |
| 36 NS_IMETHODIMP InsertTextTxn::Init(nsIDOMCharacterData *aElement, | |
| 37 uint32_t aOffset, | |
| 38 const nsAString &aStringToInsert, | |
| 39 nsIEditor *aEditor) | |
| 40 { | |
| 41 #if 0 | |
| 42 nsAutoString text; | |
| 43 aElement->GetData(text); | |
| 44 printf("InsertTextTxn: Offset to insert at = %d. Text of the node to insert into:\n", aOffset); | |
| 45 wprintf(text.get()); | |
| 46 printf("\n"); | |
| 47 #endif | |
| 48 | |
| 49 NS_ASSERTION(aElement && aEditor, "bad args"); | |
| 50 NS_ENSURE_TRUE(aElement && aEditor, NS_ERROR_NULL_POINTER); | |
| 51 | |
| 52 mElement = do_QueryInterface(aElement); | |
| 53 mOffset = aOffset; | |
| 54 mStringToInsert = aStringToInsert; | |
| 55 mEditor = aEditor; | |
| 56 return NS_OK; | |
| 57 } | |
| 58 | |
| 59 NS_IMETHODIMP InsertTextTxn::DoTransaction(void) | |
| 60 { | |
| 61 NS_ASSERTION(mElement && mEditor, "bad state"); | |
| 62 if (!mElement || !mEditor) { return NS_ERROR_NOT_INITIALIZED; } | |
| 63 | |
| 64 nsresult result = mElement->InsertData(mOffset, mStringToInsert); | |
| 65 NS_ENSURE_SUCCESS(result, result); | |
| 66 | |
| 67 // only set selection to insertion point if editor gives permission | |
| 68 bool bAdjustSelection; | |
| 69 mEditor->ShouldTxnSetSelection(&bAdjustSelection); | |
| 70 if (bAdjustSelection) | |
| 71 { | |
| 72 nsCOMPtr<nsISelection> selection; | |
| 73 result = mEditor->GetSelection(getter_AddRefs(selection)); | |
| 74 NS_ENSURE_SUCCESS(result, result); | |
| 75 NS_ENSURE_TRUE(selection, NS_ERROR_NULL_POINTER); | |
| 76 result = selection->Collapse(mElement, mOffset+mStringToInsert.Length()); | |
| 77 NS_ASSERTION((NS_SUCCEEDED(result)), "selection could not be collapsed after insert."); | |
| 78 } | |
| 79 else | |
| 80 { | |
| 81 // do nothing - dom range gravity will adjust selection | |
| 82 } | |
| 83 | |
| 84 return result; | |
| 85 } | |
| 86 | |
| 87 NS_IMETHODIMP InsertTextTxn::UndoTransaction(void) | |
| 88 { | |
| 89 NS_ASSERTION(mElement && mEditor, "bad state"); | |
| 90 if (!mElement || !mEditor) { return NS_ERROR_NOT_INITIALIZED; } | |
| 91 | |
| 92 uint32_t length = mStringToInsert.Length(); | |
| 93 return mElement->DeleteData(mOffset, length); | |
| 94 } | |
| 95 | |
| 96 NS_IMETHODIMP InsertTextTxn::Merge(nsITransaction *aTransaction, bool *aDidMerge) | |
| 97 { | |
| 98 // set out param default value | |
| 99 if (aDidMerge) | |
| 100 *aDidMerge = false; | |
| 101 nsresult result = NS_OK; | |
| 102 if (aDidMerge && aTransaction) | |
| 103 { | |
| 104 // if aTransaction is a InsertTextTxn, and if the selection hasn't changed, | |
| 105 // then absorb it | |
| 106 InsertTextTxn *otherInsTxn = nullptr; | |
| 107 aTransaction->QueryInterface(InsertTextTxn::GetCID(), (void **)&otherInsTxn); | |
| 108 if (otherInsTxn) | |
| 109 { | |
| 110 if (IsSequentialInsert(otherInsTxn)) | |
| 111 { | |
| 112 nsAutoString otherData; | |
| 113 otherInsTxn->GetData(otherData); | |
| 114 mStringToInsert += otherData; | |
| 115 *aDidMerge = true; | |
| 116 } | |
| 117 NS_RELEASE(otherInsTxn); | |
| 118 } | |
| 119 } | |
| 120 return result; | |
| 121 } | |
| 122 | |
| 123 NS_IMETHODIMP InsertTextTxn::GetTxnDescription(nsAString& aString) | |
| 124 { | |
| 125 aString.AssignLiteral("InsertTextTxn: "); | |
| 126 aString += mStringToInsert; | |
| 127 return NS_OK; | |
| 128 } | |
| 129 | |
| 130 /* ============ protected methods ================== */ | |
| 131 | |
| 132 NS_IMETHODIMP InsertTextTxn::GetData(nsString& aResult) | |
| 133 { | |
| 134 aResult = mStringToInsert; | |
| 135 return NS_OK; | |
| 136 } | |
| 137 | |
| 138 bool InsertTextTxn::IsSequentialInsert(InsertTextTxn *aOtherTxn) | |
| 139 { | |
| 140 NS_ASSERTION(aOtherTxn, "null param"); | |
| 141 if (aOtherTxn && aOtherTxn->mElement == mElement) | |
| 142 { | |
| 143 // here, we need to compare offsets. | |
| 144 int32_t length = mStringToInsert.Length(); | |
| 145 if (aOtherTxn->mOffset == (mOffset + length)) | |
| 146 return true; | |
| 147 } | |
| 148 return false; | |
| 149 } |
