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gecko-dev/editor/libeditor/WSRunObject.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "WSRunObject.h"
#include "TextEditUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/Casting.h"
#include "mozilla/EditorUtils.h"
#include "mozilla/HTMLEditor.h"
#include "mozilla/mozalloc.h"
#include "mozilla/OwningNonNull.h"
#include "mozilla/SelectionState.h"
#include "nsAString.h"
#include "nsCRT.h"
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsIContent.h"
#include "nsIDOMDocument.h"
#include "nsIDOMNode.h"
#include "nsISupportsImpl.h"
#include "nsRange.h"
#include "nsString.h"
#include "nsTextFragment.h"
namespace mozilla {
using namespace dom;
const char16_t nbsp = 160;
WSRunObject::WSRunObject(HTMLEditor* aHTMLEditor,
nsINode* aNode,
int32_t aOffset)
: mNode(aNode)
, mOffset(aOffset)
, mPRE(false)
, mStartOffset(0)
, mEndOffset(0)
, mFirstNBSPOffset(0)
, mLastNBSPOffset(0)
, mStartRun(nullptr)
, mEndRun(nullptr)
, mHTMLEditor(aHTMLEditor)
{
GetWSNodes();
GetRuns();
}
WSRunObject::WSRunObject(HTMLEditor* aHTMLEditor,
nsIDOMNode* aNode,
int32_t aOffset)
: mNode(do_QueryInterface(aNode))
, mOffset(aOffset)
, mPRE(false)
, mStartOffset(0)
, mEndOffset(0)
, mFirstNBSPOffset(0)
, mLastNBSPOffset(0)
, mStartRun(nullptr)
, mEndRun(nullptr)
, mHTMLEditor(aHTMLEditor)
{
GetWSNodes();
GetRuns();
}
WSRunObject::~WSRunObject()
{
ClearRuns();
}
nsresult
WSRunObject::ScrubBlockBoundary(HTMLEditor* aHTMLEditor,
BlockBoundary aBoundary,
nsINode* aBlock,
int32_t aOffset)
{
NS_ENSURE_TRUE(aHTMLEditor && aBlock, NS_ERROR_NULL_POINTER);
int32_t offset;
if (aBoundary == kBlockStart) {
offset = 0;
} else if (aBoundary == kBlockEnd) {
offset = aBlock->Length();
} else {
// Else we are scrubbing an outer boundary - just before or after a block
// element.
NS_ENSURE_STATE(aOffset >= 0);
offset = aOffset;
}
WSRunObject theWSObj(aHTMLEditor, aBlock, offset);
return theWSObj.Scrub();
}
nsresult
WSRunObject::PrepareToJoinBlocks(HTMLEditor* aHTMLEditor,
Element* aLeftBlock,
Element* aRightBlock)
{
NS_ENSURE_TRUE(aLeftBlock && aRightBlock && aHTMLEditor,
NS_ERROR_NULL_POINTER);
WSRunObject leftWSObj(aHTMLEditor, aLeftBlock, aLeftBlock->Length());
WSRunObject rightWSObj(aHTMLEditor, aRightBlock, 0);
return leftWSObj.PrepareToDeleteRangePriv(&rightWSObj);
}
nsresult
WSRunObject::PrepareToDeleteRange(HTMLEditor* aHTMLEditor,
nsCOMPtr<nsINode>* aStartNode,
int32_t* aStartOffset,
nsCOMPtr<nsINode>* aEndNode,
int32_t* aEndOffset)
{
NS_ENSURE_TRUE(aHTMLEditor && aStartNode && *aStartNode && aStartOffset &&
aEndNode && *aEndNode && aEndOffset, NS_ERROR_NULL_POINTER);
AutoTrackDOMPoint trackerStart(aHTMLEditor->mRangeUpdater,
aStartNode, aStartOffset);
AutoTrackDOMPoint trackerEnd(aHTMLEditor->mRangeUpdater,
aEndNode, aEndOffset);
WSRunObject leftWSObj(aHTMLEditor, *aStartNode, *aStartOffset);
WSRunObject rightWSObj(aHTMLEditor, *aEndNode, *aEndOffset);
return leftWSObj.PrepareToDeleteRangePriv(&rightWSObj);
}
nsresult
WSRunObject::PrepareToDeleteNode(HTMLEditor* aHTMLEditor,
nsIContent* aContent)
{
NS_ENSURE_TRUE(aContent && aHTMLEditor, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsINode> parent = aContent->GetParentNode();
NS_ENSURE_STATE(parent);
int32_t offset = parent->IndexOf(aContent);
WSRunObject leftWSObj(aHTMLEditor, parent, offset);
WSRunObject rightWSObj(aHTMLEditor, parent, offset + 1);
return leftWSObj.PrepareToDeleteRangePriv(&rightWSObj);
}
nsresult
WSRunObject::PrepareToSplitAcrossBlocks(HTMLEditor* aHTMLEditor,
nsCOMPtr<nsINode>* aSplitNode,
int32_t* aSplitOffset)
{
NS_ENSURE_TRUE(aHTMLEditor && aSplitNode && *aSplitNode && aSplitOffset,
NS_ERROR_NULL_POINTER);
AutoTrackDOMPoint tracker(aHTMLEditor->mRangeUpdater,
aSplitNode, aSplitOffset);
WSRunObject wsObj(aHTMLEditor, *aSplitNode, *aSplitOffset);
return wsObj.PrepareToSplitAcrossBlocksPriv();
}
already_AddRefed<Element>
WSRunObject::InsertBreak(nsCOMPtr<nsINode>* aInOutParent,
int32_t* aInOutOffset,
nsIEditor::EDirection aSelect)
{
// MOOSE: for now, we always assume non-PRE formatting. Fix this later.
// meanwhile, the pre case is handled in WillInsertText in
// HTMLEditRules.cpp
NS_ENSURE_TRUE(aInOutParent && aInOutOffset, nullptr);
WSFragment *beforeRun, *afterRun;
FindRun(*aInOutParent, *aInOutOffset, &beforeRun, false);
FindRun(*aInOutParent, *aInOutOffset, &afterRun, true);
{
// Some scoping for AutoTrackDOMPoint. This will track our insertion
// point while we tweak any surrounding whitespace
AutoTrackDOMPoint tracker(mHTMLEditor->mRangeUpdater, aInOutParent,
aInOutOffset);
// Handle any changes needed to ws run after inserted br
if (!afterRun || (afterRun->mType & WSType::trailingWS)) {
// Don't need to do anything. Just insert break. ws won't change.
} else if (afterRun->mType & WSType::leadingWS) {
// Delete the leading ws that is after insertion point. We don't
// have to (it would still not be significant after br), but it's
// just more aesthetically pleasing to.
nsresult rv = DeleteChars(*aInOutParent, *aInOutOffset,
afterRun->mEndNode, afterRun->mEndOffset);
NS_ENSURE_SUCCESS(rv, nullptr);
} else if (afterRun->mType == WSType::normalWS) {
// Need to determine if break at front of non-nbsp run. If so, convert
// run to nbsp.
WSPoint thePoint = GetCharAfter(*aInOutParent, *aInOutOffset);
if (thePoint.mTextNode && nsCRT::IsAsciiSpace(thePoint.mChar)) {
WSPoint prevPoint = GetCharBefore(thePoint);
if (!prevPoint.mTextNode ||
(prevPoint.mTextNode && !nsCRT::IsAsciiSpace(prevPoint.mChar))) {
// We are at start of non-nbsps. Convert to a single nbsp.
nsresult rv = ConvertToNBSP(thePoint);
NS_ENSURE_SUCCESS(rv, nullptr);
}
}
}
// Handle any changes needed to ws run before inserted br
if (!beforeRun || (beforeRun->mType & WSType::leadingWS)) {
// Don't need to do anything. Just insert break. ws won't change.
} else if (beforeRun->mType & WSType::trailingWS) {
// Need to delete the trailing ws that is before insertion point, because it
// would become significant after break inserted.
nsresult rv = DeleteChars(beforeRun->mStartNode, beforeRun->mStartOffset,
*aInOutParent, *aInOutOffset);
NS_ENSURE_SUCCESS(rv, nullptr);
} else if (beforeRun->mType == WSType::normalWS) {
// Try to change an nbsp to a space, just to prevent nbsp proliferation
nsresult rv = CheckTrailingNBSP(beforeRun, *aInOutParent, *aInOutOffset);
NS_ENSURE_SUCCESS(rv, nullptr);
}
}
// ready, aim, fire!
return mHTMLEditor->CreateBRImpl(aInOutParent, aInOutOffset, aSelect);
}
nsresult
WSRunObject::InsertText(const nsAString& aStringToInsert,
nsCOMPtr<nsINode>* aInOutParent,
nsCOMPtr<nsIContent>* aInOutChildAtOffset,
int32_t* aInOutOffset,
nsIDocument* aDoc)
{
// MOOSE: for now, we always assume non-PRE formatting. Fix this later.
// meanwhile, the pre case is handled in WillInsertText in
// HTMLEditRules.cpp
// MOOSE: for now, just getting the ws logic straight. This implementation
// is very slow. Will need to replace edit rules impl with a more efficient
// text sink here that does the minimal amount of searching/replacing/copying
NS_ENSURE_TRUE(aInOutParent && aInOutOffset && aDoc, NS_ERROR_NULL_POINTER);
if (aStringToInsert.IsEmpty()) {
return NS_OK;
}
nsAutoString theString(aStringToInsert);
WSFragment *beforeRun, *afterRun;
FindRun(*aInOutParent, *aInOutOffset, &beforeRun, false);
FindRun(*aInOutParent, *aInOutOffset, &afterRun, true);
{
// Some scoping for AutoTrackDOMPoint. This will track our insertion
// point while we tweak any surrounding whitespace
AutoTrackDOMPoint tracker(mHTMLEditor->mRangeUpdater, aInOutParent,
aInOutOffset);
bool maybeModified = false;
// Handle any changes needed to ws run after inserted text
if (!afterRun || afterRun->mType & WSType::trailingWS) {
// Don't need to do anything. Just insert text. ws won't change.
} else if (afterRun->mType & WSType::leadingWS) {
// Delete the leading ws that is after insertion point, because it
// would become significant after text inserted.
nsresult rv =
DeleteChars(*aInOutParent, *aInOutOffset, afterRun->mEndNode,
afterRun->mEndOffset);
NS_ENSURE_SUCCESS(rv, rv);
maybeModified = true;
} else if (afterRun->mType == WSType::normalWS) {
// Try to change an nbsp to a space, if possible, just to prevent nbsp
// proliferation
nsresult rv = CheckLeadingNBSP(afterRun, *aInOutParent, *aInOutOffset);
NS_ENSURE_SUCCESS(rv, rv);
maybeModified = true;
}
// Handle any changes needed to ws run before inserted text
if (!beforeRun || beforeRun->mType & WSType::leadingWS) {
// Don't need to do anything. Just insert text. ws won't change.
} else if (beforeRun->mType & WSType::trailingWS) {
// Need to delete the trailing ws that is before insertion point, because
// it would become significant after text inserted.
nsresult rv =
DeleteChars(beforeRun->mStartNode, beforeRun->mStartOffset,
*aInOutParent, *aInOutOffset);
NS_ENSURE_SUCCESS(rv, rv);
maybeModified = true;
} else if (beforeRun->mType == WSType::normalWS) {
// Try to change an nbsp to a space, if possible, just to prevent nbsp
// proliferation
nsresult rv = CheckTrailingNBSP(beforeRun, *aInOutParent, *aInOutOffset);
NS_ENSURE_SUCCESS(rv, rv);
maybeModified = true;
}
// The child node may be changed. So, even though getting child at offset
// is expensive, we need to do it here.
if (maybeModified) {
if ((*aInOutParent)->HasChildren()) {
if (*aInOutOffset == 0) {
*aInOutChildAtOffset = (*aInOutParent)->GetFirstChild();
} else {
*aInOutChildAtOffset = (*aInOutParent)->GetChildAt(*aInOutOffset);
}
} else {
*aInOutChildAtOffset = nullptr;
}
}
}
// Next up, tweak head and tail of string as needed. First the head: there
// are a variety of circumstances that would require us to convert a leading
// ws char into an nbsp:
if (nsCRT::IsAsciiSpace(theString[0])) {
// We have a leading space
if (beforeRun) {
if (beforeRun->mType & WSType::leadingWS) {
theString.SetCharAt(nbsp, 0);
} else if (beforeRun->mType & WSType::normalWS) {
WSPoint wspoint = GetCharBefore(*aInOutParent, *aInOutOffset);
if (wspoint.mTextNode && nsCRT::IsAsciiSpace(wspoint.mChar)) {
theString.SetCharAt(nbsp, 0);
}
}
} else if (mStartReason & WSType::block || mStartReason == WSType::br) {
theString.SetCharAt(nbsp, 0);
}
}
// Then the tail
uint32_t lastCharIndex = theString.Length() - 1;
if (nsCRT::IsAsciiSpace(theString[lastCharIndex])) {
// We have a leading space
if (afterRun) {
if (afterRun->mType & WSType::trailingWS) {
theString.SetCharAt(nbsp, lastCharIndex);
} else if (afterRun->mType & WSType::normalWS) {
WSPoint wspoint = GetCharAfter(*aInOutParent, *aInOutOffset);
if (wspoint.mTextNode && nsCRT::IsAsciiSpace(wspoint.mChar)) {
theString.SetCharAt(nbsp, lastCharIndex);
}
}
} else if (mEndReason & WSType::block) {
theString.SetCharAt(nbsp, lastCharIndex);
}
}
// Next, scan string for adjacent ws and convert to nbsp/space combos
// MOOSE: don't need to convert tabs here since that is done by
// WillInsertText() before we are called. Eventually, all that logic will be
// pushed down into here and made more efficient.
bool prevWS = false;
for (uint32_t i = 0; i <= lastCharIndex; i++) {
if (nsCRT::IsAsciiSpace(theString[i])) {
if (prevWS) {
// i - 1 can't be negative because prevWS starts out false
theString.SetCharAt(nbsp, i - 1);
} else {
prevWS = true;
}
} else {
prevWS = false;
}
}
// Ready, aim, fire!
mHTMLEditor->InsertTextImpl(theString, aInOutParent, aInOutChildAtOffset,
aInOutOffset, aDoc);
return NS_OK;
}
nsresult
WSRunObject::DeleteWSBackward()
{
WSPoint point = GetCharBefore(mNode, mOffset);
NS_ENSURE_TRUE(point.mTextNode, NS_OK); // nothing to delete
// Easy case, preformatted ws.
if (mPRE && (nsCRT::IsAsciiSpace(point.mChar) || point.mChar == nbsp)) {
return DeleteChars(point.mTextNode, point.mOffset,
point.mTextNode, point.mOffset + 1);
}
// Caller's job to ensure that previous char is really ws. If it is normal
// ws, we need to delete the whole run.
if (nsCRT::IsAsciiSpace(point.mChar)) {
RefPtr<Text> startNodeText, endNodeText;
int32_t startOffset, endOffset;
GetAsciiWSBounds(eBoth, point.mTextNode, point.mOffset + 1,
getter_AddRefs(startNodeText), &startOffset,
getter_AddRefs(endNodeText), &endOffset);
// adjust surrounding ws
nsCOMPtr<nsINode> startNode = startNodeText.get();
nsCOMPtr<nsINode> endNode = endNodeText.get();
nsresult rv =
WSRunObject::PrepareToDeleteRange(mHTMLEditor,
address_of(startNode), &startOffset,
address_of(endNode), &endOffset);
NS_ENSURE_SUCCESS(rv, rv);
// finally, delete that ws
return DeleteChars(startNode, startOffset, endNode, endOffset);
}
if (point.mChar == nbsp) {
nsCOMPtr<nsINode> node(point.mTextNode);
// adjust surrounding ws
int32_t startOffset = point.mOffset;
int32_t endOffset = point.mOffset + 1;
nsresult rv =
WSRunObject::PrepareToDeleteRange(mHTMLEditor,
address_of(node), &startOffset,
address_of(node), &endOffset);
NS_ENSURE_SUCCESS(rv, rv);
// finally, delete that ws
return DeleteChars(node, startOffset, node, endOffset);
}
return NS_OK;
}
nsresult
WSRunObject::DeleteWSForward()
{
WSPoint point = GetCharAfter(mNode, mOffset);
NS_ENSURE_TRUE(point.mTextNode, NS_OK); // nothing to delete
// Easy case, preformatted ws.
if (mPRE && (nsCRT::IsAsciiSpace(point.mChar) || point.mChar == nbsp)) {
return DeleteChars(point.mTextNode, point.mOffset,
point.mTextNode, point.mOffset + 1);
}
// Caller's job to ensure that next char is really ws. If it is normal ws,
// we need to delete the whole run.
if (nsCRT::IsAsciiSpace(point.mChar)) {
RefPtr<Text> startNodeText, endNodeText;
int32_t startOffset, endOffset;
GetAsciiWSBounds(eBoth, point.mTextNode, point.mOffset + 1,
getter_AddRefs(startNodeText), &startOffset,
getter_AddRefs(endNodeText), &endOffset);
// Adjust surrounding ws
nsCOMPtr<nsINode> startNode(startNodeText), endNode(endNodeText);
nsresult rv =
WSRunObject::PrepareToDeleteRange(mHTMLEditor,
address_of(startNode), &startOffset,
address_of(endNode), &endOffset);
NS_ENSURE_SUCCESS(rv, rv);
// Finally, delete that ws
return DeleteChars(startNode, startOffset, endNode, endOffset);
}
if (point.mChar == nbsp) {
nsCOMPtr<nsINode> node(point.mTextNode);
// Adjust surrounding ws
int32_t startOffset = point.mOffset;
int32_t endOffset = point.mOffset+1;
nsresult rv =
WSRunObject::PrepareToDeleteRange(mHTMLEditor,
address_of(node), &startOffset,
address_of(node), &endOffset);
NS_ENSURE_SUCCESS(rv, rv);
// Finally, delete that ws
return DeleteChars(node, startOffset, node, endOffset);
}
return NS_OK;
}
void
WSRunObject::PriorVisibleNode(nsINode* aNode,
int32_t aOffset,
nsCOMPtr<nsINode>* outVisNode,
int32_t* outVisOffset,
WSType* outType)
{
// Find first visible thing before the point. Position
// outVisNode/outVisOffset just _after_ that thing. If we don't find
// anything return start of ws.
MOZ_ASSERT(aNode && outVisNode && outVisOffset && outType);
WSFragment* run;
FindRun(aNode, aOffset, &run, false);
// Is there a visible run there or earlier?
for (; run; run = run->mLeft) {
if (run->mType == WSType::normalWS) {
WSPoint point = GetCharBefore(aNode, aOffset);
// When it's a non-empty text node, return it.
if (point.mTextNode && point.mTextNode->Length()) {
*outVisNode = point.mTextNode;
*outVisOffset = point.mOffset + 1;
if (nsCRT::IsAsciiSpace(point.mChar) || point.mChar == nbsp) {
*outType = WSType::normalWS;
} else {
*outType = WSType::text;
}
return;
}
// If no text node, keep looking. We should eventually fall out of loop
}
}
// If we get here, then nothing in ws data to find. Return start reason.
*outVisNode = mStartReasonNode;
// This really isn't meaningful if mStartReasonNode != mStartNode
*outVisOffset = mStartOffset;
*outType = mStartReason;
}
void
WSRunObject::NextVisibleNode(nsINode* aNode,
int32_t aOffset,
nsCOMPtr<nsINode>* outVisNode,
int32_t* outVisOffset,
WSType* outType)
{
// Find first visible thing after the point. Position
// outVisNode/outVisOffset just _before_ that thing. If we don't find
// anything return end of ws.
MOZ_ASSERT(aNode && outVisNode && outVisOffset && outType);
WSFragment* run;
FindRun(aNode, aOffset, &run, true);
// Is there a visible run there or later?
for (; run; run = run->mRight) {
if (run->mType == WSType::normalWS) {
WSPoint point = GetCharAfter(aNode, aOffset);
// When it's a non-empty text node, return it.
if (point.mTextNode && point.mTextNode->Length()) {
*outVisNode = point.mTextNode;
*outVisOffset = point.mOffset;
if (nsCRT::IsAsciiSpace(point.mChar) || point.mChar == nbsp) {
*outType = WSType::normalWS;
} else {
*outType = WSType::text;
}
return;
}
// If no text node, keep looking. We should eventually fall out of loop
}
}
// If we get here, then nothing in ws data to find. Return end reason
*outVisNode = mEndReasonNode;
// This really isn't meaningful if mEndReasonNode != mEndNode
*outVisOffset = mEndOffset;
*outType = mEndReason;
}
nsresult
WSRunObject::AdjustWhitespace()
{
// this routine examines a run of ws and tries to get rid of some unneeded nbsp's,
// replacing them with regualr ascii space if possible. Keeping things simple
// for now and just trying to fix up the trailing ws in the run.
if (!mLastNBSPNode) {
// nothing to do!
return NS_OK;
}
WSFragment *curRun = mStartRun;
while (curRun) {
// look for normal ws run
if (curRun->mType == WSType::normalWS) {
nsresult rv = CheckTrailingNBSPOfRun(curRun);
if (NS_FAILED(rv)) {
return rv;
}
}
curRun = curRun->mRight;
}
return NS_OK;
}
//--------------------------------------------------------------------------------------------
// protected methods
//--------------------------------------------------------------------------------------------
nsINode*
WSRunObject::GetWSBoundingParent()
{
NS_ENSURE_TRUE(mNode, nullptr);
OwningNonNull<nsINode> wsBoundingParent = *mNode;
while (!IsBlockNode(wsBoundingParent)) {
nsCOMPtr<nsINode> parent = wsBoundingParent->GetParentNode();
if (!parent || !mHTMLEditor->IsEditable(parent)) {
break;
}
wsBoundingParent = parent;
}
return wsBoundingParent;
}
nsresult
WSRunObject::GetWSNodes()
{
// collect up an array of nodes that are contiguous with the insertion point
// and which contain only whitespace. Stop if you reach non-ws text or a new
// block boundary.
EditorDOMPoint start(mNode, mOffset), end(mNode, mOffset);
nsCOMPtr<nsINode> wsBoundingParent = GetWSBoundingParent();
// first look backwards to find preceding ws nodes
if (RefPtr<Text> textNode = mNode->GetAsText()) {
const nsTextFragment* textFrag = textNode->GetText();
mNodeArray.InsertElementAt(0, textNode);
if (mOffset) {
for (int32_t pos = mOffset - 1; pos >= 0; pos--) {
// sanity bounds check the char position. bug 136165
if (uint32_t(pos) >= textFrag->GetLength()) {
NS_NOTREACHED("looking beyond end of text fragment");
continue;
}
char16_t theChar = textFrag->CharAt(pos);
if (!nsCRT::IsAsciiSpace(theChar)) {
if (theChar != nbsp) {
mStartNode = textNode;
mStartOffset = pos + 1;
mStartReason = WSType::text;
mStartReasonNode = textNode;
break;
}
// as we look backwards update our earliest found nbsp
mFirstNBSPNode = textNode;
mFirstNBSPOffset = pos;
// also keep track of latest nbsp so far
if (!mLastNBSPNode) {
mLastNBSPNode = textNode;
mLastNBSPOffset = pos;
}
}
start.node = textNode;
start.offset = pos;
}
}
}
while (!mStartNode) {
// we haven't found the start of ws yet. Keep looking
nsCOMPtr<nsIContent> priorNode = GetPreviousWSNode(start, wsBoundingParent);
if (priorNode) {
if (IsBlockNode(priorNode)) {
mStartNode = start.node;
mStartOffset = start.offset;
mStartReason = WSType::otherBlock;
mStartReasonNode = priorNode;
} else if (priorNode->IsNodeOfType(nsINode::eTEXT) &&
priorNode->IsEditable()) {
RefPtr<Text> textNode = priorNode->GetAsText();
mNodeArray.InsertElementAt(0, textNode);
const nsTextFragment *textFrag;
if (!textNode || !(textFrag = textNode->GetText())) {
return NS_ERROR_NULL_POINTER;
}
uint32_t len = textNode->TextLength();
if (len < 1) {
// Zero length text node. Set start point to it
// so we can get past it!
start.SetPoint(priorNode, 0);
} else {
for (int32_t pos = len - 1; pos >= 0; pos--) {
// sanity bounds check the char position. bug 136165
if (uint32_t(pos) >= textFrag->GetLength()) {
NS_NOTREACHED("looking beyond end of text fragment");
continue;
}
char16_t theChar = textFrag->CharAt(pos);
if (!nsCRT::IsAsciiSpace(theChar)) {
if (theChar != nbsp) {
mStartNode = textNode;
mStartOffset = pos + 1;
mStartReason = WSType::text;
mStartReasonNode = textNode;
break;
}
// as we look backwards update our earliest found nbsp
mFirstNBSPNode = textNode;
mFirstNBSPOffset = pos;
// also keep track of latest nbsp so far
if (!mLastNBSPNode) {
mLastNBSPNode = textNode;
mLastNBSPOffset = pos;
}
}
start.SetPoint(textNode, pos);
}
}
} else {
// it's a break or a special node, like <img>, that is not a block and not
// a break but still serves as a terminator to ws runs.
mStartNode = start.node;
mStartOffset = start.offset;
if (TextEditUtils::IsBreak(priorNode)) {
mStartReason = WSType::br;
} else {
mStartReason = WSType::special;
}
mStartReasonNode = priorNode;
}
} else {
// no prior node means we exhausted wsBoundingParent
mStartNode = start.node;
mStartOffset = start.offset;
mStartReason = WSType::thisBlock;
mStartReasonNode = wsBoundingParent;
}
}
// then look ahead to find following ws nodes
if (RefPtr<Text> textNode = mNode->GetAsText()) {
// don't need to put it on list. it already is from code above
const nsTextFragment *textFrag = textNode->GetText();
uint32_t len = textNode->TextLength();
if (uint16_t(mOffset)<len) {
for (uint32_t pos = mOffset; pos < len; pos++) {
// sanity bounds check the char position. bug 136165
if (pos >= textFrag->GetLength()) {
NS_NOTREACHED("looking beyond end of text fragment");
continue;
}
char16_t theChar = textFrag->CharAt(pos);
if (!nsCRT::IsAsciiSpace(theChar)) {
if (theChar != nbsp) {
mEndNode = textNode;
mEndOffset = pos;
mEndReason = WSType::text;
mEndReasonNode = textNode;
break;
}
// as we look forwards update our latest found nbsp
mLastNBSPNode = textNode;
mLastNBSPOffset = pos;
// also keep track of earliest nbsp so far
if (!mFirstNBSPNode) {
mFirstNBSPNode = textNode;
mFirstNBSPOffset = pos;
}
}
end.SetPoint(textNode, pos + 1);
}
}
}
while (!mEndNode) {
// we haven't found the end of ws yet. Keep looking
nsCOMPtr<nsIContent> nextNode = GetNextWSNode(end, wsBoundingParent);
if (nextNode) {
if (IsBlockNode(nextNode)) {
// we encountered a new block. therefore no more ws.
mEndNode = end.node;
mEndOffset = end.offset;
mEndReason = WSType::otherBlock;
mEndReasonNode = nextNode;
} else if (nextNode->IsNodeOfType(nsINode::eTEXT) &&
nextNode->IsEditable()) {
RefPtr<Text> textNode = nextNode->GetAsText();
mNodeArray.AppendElement(textNode);
const nsTextFragment *textFrag;
if (!textNode || !(textFrag = textNode->GetText())) {
return NS_ERROR_NULL_POINTER;
}
uint32_t len = textNode->TextLength();
if (len < 1) {
// Zero length text node. Set end point to it
// so we can get past it!
end.SetPoint(textNode, 0);
} else {
for (uint32_t pos = 0; pos < len; pos++) {
// sanity bounds check the char position. bug 136165
if (pos >= textFrag->GetLength()) {
NS_NOTREACHED("looking beyond end of text fragment");
continue;
}
char16_t theChar = textFrag->CharAt(pos);
if (!nsCRT::IsAsciiSpace(theChar)) {
if (theChar != nbsp) {
mEndNode = textNode;
mEndOffset = pos;
mEndReason = WSType::text;
mEndReasonNode = textNode;
break;
}
// as we look forwards update our latest found nbsp
mLastNBSPNode = textNode;
mLastNBSPOffset = pos;
// also keep track of earliest nbsp so far
if (!mFirstNBSPNode) {
mFirstNBSPNode = textNode;
mFirstNBSPOffset = pos;
}
}
end.SetPoint(textNode, pos + 1);
}
}
} else {
// we encountered a break or a special node, like <img>,
// that is not a block and not a break but still
// serves as a terminator to ws runs.
mEndNode = end.node;
mEndOffset = end.offset;
if (TextEditUtils::IsBreak(nextNode)) {
mEndReason = WSType::br;
} else {
mEndReason = WSType::special;
}
mEndReasonNode = nextNode;
}
} else {
// no next node means we exhausted wsBoundingParent
mEndNode = end.node;
mEndOffset = end.offset;
mEndReason = WSType::thisBlock;
mEndReasonNode = wsBoundingParent;
}
}
return NS_OK;
}
void
WSRunObject::GetRuns()
{
ClearRuns();
// handle some easy cases first
mHTMLEditor->IsPreformatted(GetAsDOMNode(mNode), &mPRE);
// if it's preformatedd, or if we are surrounded by text or special, it's all one
// big normal ws run
if (mPRE ||
((mStartReason == WSType::text || mStartReason == WSType::special) &&
(mEndReason == WSType::text || mEndReason == WSType::special ||
mEndReason == WSType::br))) {
MakeSingleWSRun(WSType::normalWS);
return;
}
// if we are before or after a block (or after a break), and there are no nbsp's,
// then it's all non-rendering ws.
if (!mFirstNBSPNode && !mLastNBSPNode &&
((mStartReason & WSType::block) || mStartReason == WSType::br ||
(mEndReason & WSType::block))) {
WSType wstype;
if ((mStartReason & WSType::block) || mStartReason == WSType::br) {
wstype = WSType::leadingWS;
}
if (mEndReason & WSType::block) {
wstype |= WSType::trailingWS;
}
MakeSingleWSRun(wstype);
return;
}
// otherwise a little trickier. shucks.
mStartRun = new WSFragment();
mStartRun->mStartNode = mStartNode;
mStartRun->mStartOffset = mStartOffset;
if (mStartReason & WSType::block || mStartReason == WSType::br) {
// set up mStartRun
mStartRun->mType = WSType::leadingWS;
mStartRun->mEndNode = mFirstNBSPNode;
mStartRun->mEndOffset = mFirstNBSPOffset;
mStartRun->mLeftType = mStartReason;
mStartRun->mRightType = WSType::normalWS;
// set up next run
WSFragment *normalRun = new WSFragment();
mStartRun->mRight = normalRun;
normalRun->mType = WSType::normalWS;
normalRun->mStartNode = mFirstNBSPNode;
normalRun->mStartOffset = mFirstNBSPOffset;
normalRun->mLeftType = WSType::leadingWS;
normalRun->mLeft = mStartRun;
if (mEndReason != WSType::block) {
// then no trailing ws. this normal run ends the overall ws run.
normalRun->mRightType = mEndReason;
normalRun->mEndNode = mEndNode;
normalRun->mEndOffset = mEndOffset;
mEndRun = normalRun;
} else {
// we might have trailing ws.
// it so happens that *if* there is an nbsp at end, {mEndNode,mEndOffset-1}
// will point to it, even though in general start/end points not
// guaranteed to be in text nodes.
if (mLastNBSPNode == mEndNode && mLastNBSPOffset == mEndOffset - 1) {
// normal ws runs right up to adjacent block (nbsp next to block)
normalRun->mRightType = mEndReason;
normalRun->mEndNode = mEndNode;
normalRun->mEndOffset = mEndOffset;
mEndRun = normalRun;
} else {
normalRun->mEndNode = mLastNBSPNode;
normalRun->mEndOffset = mLastNBSPOffset+1;
normalRun->mRightType = WSType::trailingWS;
// set up next run
WSFragment *lastRun = new WSFragment();
lastRun->mType = WSType::trailingWS;
lastRun->mStartNode = mLastNBSPNode;
lastRun->mStartOffset = mLastNBSPOffset+1;
lastRun->mEndNode = mEndNode;
lastRun->mEndOffset = mEndOffset;
lastRun->mLeftType = WSType::normalWS;
lastRun->mLeft = normalRun;
lastRun->mRightType = mEndReason;
mEndRun = lastRun;
normalRun->mRight = lastRun;
}
}
} else {
// mStartReason is not WSType::block or WSType::br; set up mStartRun
mStartRun->mType = WSType::normalWS;
mStartRun->mEndNode = mLastNBSPNode;
mStartRun->mEndOffset = mLastNBSPOffset+1;
mStartRun->mLeftType = mStartReason;
// we might have trailing ws.
// it so happens that *if* there is an nbsp at end, {mEndNode,mEndOffset-1}
// will point to it, even though in general start/end points not
// guaranteed to be in text nodes.
if (mLastNBSPNode == mEndNode && mLastNBSPOffset == (mEndOffset - 1)) {
mStartRun->mRightType = mEndReason;
mStartRun->mEndNode = mEndNode;
mStartRun->mEndOffset = mEndOffset;
mEndRun = mStartRun;
} else {
// set up next run
WSFragment *lastRun = new WSFragment();
lastRun->mType = WSType::trailingWS;
lastRun->mStartNode = mLastNBSPNode;
lastRun->mStartOffset = mLastNBSPOffset+1;
lastRun->mLeftType = WSType::normalWS;
lastRun->mLeft = mStartRun;
lastRun->mRightType = mEndReason;
mEndRun = lastRun;
mStartRun->mRight = lastRun;
mStartRun->mRightType = WSType::trailingWS;
}
}
}
void
WSRunObject::ClearRuns()
{
WSFragment *tmp, *run;
run = mStartRun;
while (run) {
tmp = run->mRight;
delete run;
run = tmp;
}
mStartRun = 0;
mEndRun = 0;
}
void
WSRunObject::MakeSingleWSRun(WSType aType)
{
mStartRun = new WSFragment();
mStartRun->mStartNode = mStartNode;
mStartRun->mStartOffset = mStartOffset;
mStartRun->mType = aType;
mStartRun->mEndNode = mEndNode;
mStartRun->mEndOffset = mEndOffset;
mStartRun->mLeftType = mStartReason;
mStartRun->mRightType = mEndReason;
mEndRun = mStartRun;
}
nsIContent*
WSRunObject::GetPreviousWSNodeInner(nsINode* aStartNode,
nsINode* aBlockParent)
{
// Can't really recycle various getnext/prior routines because we have
// special needs here. Need to step into inline containers but not block
// containers.
MOZ_ASSERT(aStartNode && aBlockParent);
nsCOMPtr<nsIContent> priorNode = aStartNode->GetPreviousSibling();
OwningNonNull<nsINode> curNode = *aStartNode;
while (!priorNode) {
// We have exhausted nodes in parent of aStartNode.
nsCOMPtr<nsINode> curParent = curNode->GetParentNode();
NS_ENSURE_TRUE(curParent, nullptr);
if (curParent == aBlockParent) {
// We have exhausted nodes in the block parent. The convention here is
// to return null.
return nullptr;
}
// We have a parent: look for previous sibling
priorNode = curParent->GetPreviousSibling();
curNode = curParent;
}
// We have a prior node. If it's a block, return it.
if (IsBlockNode(priorNode)) {
return priorNode;
}
if (mHTMLEditor->IsContainer(priorNode)) {
// Else if it's a container, get deep rightmost child
nsCOMPtr<nsIContent> child = mHTMLEditor->GetRightmostChild(priorNode);
if (child) {
return child;
}
}
// Else return the node itself
return priorNode;
}
nsIContent*
WSRunObject::GetPreviousWSNode(EditorDOMPoint aPoint,
nsINode* aBlockParent)
{
// Can't really recycle various getnext/prior routines because we
// have special needs here. Need to step into inline containers but
// not block containers.
MOZ_ASSERT(aPoint.node && aBlockParent);
if (aPoint.node->NodeType() == nsIDOMNode::TEXT_NODE) {
return GetPreviousWSNodeInner(aPoint.node, aBlockParent);
}
if (!mHTMLEditor->IsContainer(aPoint.node)) {
return GetPreviousWSNodeInner(aPoint.node, aBlockParent);
}
if (!aPoint.offset) {
if (aPoint.node == aBlockParent) {
// We are at start of the block.
return nullptr;
}
// We are at start of non-block container
return GetPreviousWSNodeInner(aPoint.node, aBlockParent);
}
nsCOMPtr<nsIContent> startContent = do_QueryInterface(aPoint.node);
NS_ENSURE_TRUE(startContent, nullptr);
nsCOMPtr<nsIContent> priorNode = startContent->GetChildAt(aPoint.offset - 1);
NS_ENSURE_TRUE(priorNode, nullptr);
// We have a prior node. If it's a block, return it.
if (IsBlockNode(priorNode)) {
return priorNode;
}
if (mHTMLEditor->IsContainer(priorNode)) {
// Else if it's a container, get deep rightmost child
nsCOMPtr<nsIContent> child = mHTMLEditor->GetRightmostChild(priorNode);
if (child) {
return child;
}
}
// Else return the node itself
return priorNode;
}
nsIContent*
WSRunObject::GetNextWSNodeInner(nsINode* aStartNode,
nsINode* aBlockParent)
{
// Can't really recycle various getnext/prior routines because we have
// special needs here. Need to step into inline containers but not block
// containers.
MOZ_ASSERT(aStartNode && aBlockParent);
nsCOMPtr<nsIContent> nextNode = aStartNode->GetNextSibling();
nsCOMPtr<nsINode> curNode = aStartNode;
while (!nextNode) {
// We have exhausted nodes in parent of aStartNode.
nsCOMPtr<nsINode> curParent = curNode->GetParentNode();
NS_ENSURE_TRUE(curParent, nullptr);
if (curParent == aBlockParent) {
// We have exhausted nodes in the block parent. The convention here is
// to return null.
return nullptr;
}
// We have a parent: look for next sibling
nextNode = curParent->GetNextSibling();
curNode = curParent;
}
// We have a next node. If it's a block, return it.
if (IsBlockNode(nextNode)) {
return nextNode;
}
if (mHTMLEditor->IsContainer(nextNode)) {
// Else if it's a container, get deep leftmost child
nsCOMPtr<nsIContent> child = mHTMLEditor->GetLeftmostChild(nextNode);
if (child) {
return child;
}
}
// Else return the node itself
return nextNode;
}
nsIContent*
WSRunObject::GetNextWSNode(EditorDOMPoint aPoint,
nsINode* aBlockParent)
{
// Can't really recycle various getnext/prior routines because we have
// special needs here. Need to step into inline containers but not block
// containers.
MOZ_ASSERT(aPoint.node && aBlockParent);
if (aPoint.node->NodeType() == nsIDOMNode::TEXT_NODE) {
return GetNextWSNodeInner(aPoint.node, aBlockParent);
}
if (!mHTMLEditor->IsContainer(aPoint.node)) {
return GetNextWSNodeInner(aPoint.node, aBlockParent);
}
nsCOMPtr<nsIContent> startContent = do_QueryInterface(aPoint.node);
NS_ENSURE_TRUE(startContent, nullptr);
nsCOMPtr<nsIContent> nextNode = startContent->GetChildAt(aPoint.offset);
if (!nextNode) {
if (aPoint.node == aBlockParent) {
// We are at end of the block.
return nullptr;
}
// We are at end of non-block container
return GetNextWSNodeInner(aPoint.node, aBlockParent);
}
// We have a next node. If it's a block, return it.
if (IsBlockNode(nextNode)) {
return nextNode;
}
if (mHTMLEditor->IsContainer(nextNode)) {
// else if it's a container, get deep leftmost child
nsCOMPtr<nsIContent> child = mHTMLEditor->GetLeftmostChild(nextNode);
if (child) {
return child;
}
}
// Else return the node itself
return nextNode;
}
nsresult
WSRunObject::PrepareToDeleteRangePriv(WSRunObject* aEndObject)
{
// this routine adjust whitespace before *this* and after aEndObject
// in preperation for the two areas to become adjacent after the
// intervening content is deleted. It's overly agressive right
// now. There might be a block boundary remaining between them after
// the deletion, in which case these adjstments are unneeded (though
// I don't think they can ever be harmful?)
NS_ENSURE_TRUE(aEndObject, NS_ERROR_NULL_POINTER);
// get the runs before and after selection
WSFragment *beforeRun, *afterRun;
FindRun(mNode, mOffset, &beforeRun, false);
aEndObject->FindRun(aEndObject->mNode, aEndObject->mOffset, &afterRun, true);
// trim after run of any leading ws
if (afterRun && (afterRun->mType & WSType::leadingWS)) {
nsresult rv =
aEndObject->DeleteChars(aEndObject->mNode, aEndObject->mOffset,
afterRun->mEndNode, afterRun->mEndOffset);
NS_ENSURE_SUCCESS(rv, rv);
}
// adjust normal ws in afterRun if needed
if (afterRun && afterRun->mType == WSType::normalWS && !aEndObject->mPRE) {
if ((beforeRun && (beforeRun->mType & WSType::leadingWS)) ||
(!beforeRun && ((mStartReason & WSType::block) ||
mStartReason == WSType::br))) {
// make sure leading char of following ws is an nbsp, so that it will show up
WSPoint point = aEndObject->GetCharAfter(aEndObject->mNode,
aEndObject->mOffset);
if (point.mTextNode && nsCRT::IsAsciiSpace(point.mChar)) {
nsresult rv = aEndObject->ConvertToNBSP(point);
NS_ENSURE_SUCCESS(rv, rv);
}
}
}
// trim before run of any trailing ws
if (beforeRun && (beforeRun->mType & WSType::trailingWS)) {
nsresult rv = DeleteChars(beforeRun->mStartNode, beforeRun->mStartOffset,
mNode, mOffset);
NS_ENSURE_SUCCESS(rv, rv);
} else if (beforeRun && beforeRun->mType == WSType::normalWS && !mPRE) {
if ((afterRun && (afterRun->mType & WSType::trailingWS)) ||
(afterRun && afterRun->mType == WSType::normalWS) ||
(!afterRun && (aEndObject->mEndReason & WSType::block))) {
// make sure trailing char of starting ws is an nbsp, so that it will show up
WSPoint point = GetCharBefore(mNode, mOffset);
if (point.mTextNode && nsCRT::IsAsciiSpace(point.mChar)) {
RefPtr<Text> wsStartNode, wsEndNode;
int32_t wsStartOffset, wsEndOffset;
GetAsciiWSBounds(eBoth, mNode, mOffset,
getter_AddRefs(wsStartNode), &wsStartOffset,
getter_AddRefs(wsEndNode), &wsEndOffset);
point.mTextNode = wsStartNode;
point.mOffset = wsStartOffset;
nsresult rv = ConvertToNBSP(point);
NS_ENSURE_SUCCESS(rv, rv);
}
}
}
return NS_OK;
}
nsresult
WSRunObject::PrepareToSplitAcrossBlocksPriv()
{
// used to prepare ws to be split across two blocks. The main issue
// here is make sure normalWS doesn't end up becoming non-significant
// leading or trailing ws after the split.
// get the runs before and after selection
WSFragment *beforeRun, *afterRun;
FindRun(mNode, mOffset, &beforeRun, false);
FindRun(mNode, mOffset, &afterRun, true);
// adjust normal ws in afterRun if needed
if (afterRun && afterRun->mType == WSType::normalWS) {
// make sure leading char of following ws is an nbsp, so that it will show up
WSPoint point = GetCharAfter(mNode, mOffset);
if (point.mTextNode && nsCRT::IsAsciiSpace(point.mChar)) {
nsresult rv = ConvertToNBSP(point);
NS_ENSURE_SUCCESS(rv, rv);
}
}
// adjust normal ws in beforeRun if needed
if (beforeRun && beforeRun->mType == WSType::normalWS) {
// make sure trailing char of starting ws is an nbsp, so that it will show up
WSPoint point = GetCharBefore(mNode, mOffset);
if (point.mTextNode && nsCRT::IsAsciiSpace(point.mChar)) {
RefPtr<Text> wsStartNode, wsEndNode;
int32_t wsStartOffset, wsEndOffset;
GetAsciiWSBounds(eBoth, mNode, mOffset,
getter_AddRefs(wsStartNode), &wsStartOffset,
getter_AddRefs(wsEndNode), &wsEndOffset);
point.mTextNode = wsStartNode;
point.mOffset = wsStartOffset;
nsresult rv = ConvertToNBSP(point);
NS_ENSURE_SUCCESS(rv, rv);
}
}
return NS_OK;
}
nsresult
WSRunObject::DeleteChars(nsINode* aStartNode,
int32_t aStartOffset,
nsINode* aEndNode,
int32_t aEndOffset)
{
// MOOSE: this routine needs to be modified to preserve the integrity of the
// wsFragment info.
NS_ENSURE_TRUE(aStartNode && aEndNode, NS_ERROR_NULL_POINTER);
if (aStartNode == aEndNode && aStartOffset == aEndOffset) {
// Nothing to delete
return NS_OK;
}
int32_t idx = mNodeArray.IndexOf(aStartNode);
if (idx == -1) {
// If our strarting point wasn't one of our ws text nodes, then just go
// through them from the beginning.
idx = 0;
}
if (aStartNode == aEndNode && aStartNode->GetAsText()) {
return mHTMLEditor->DeleteText(*aStartNode->GetAsText(),
static_cast<uint32_t>(aStartOffset),
static_cast<uint32_t>(aEndOffset - aStartOffset));
}
RefPtr<nsRange> range;
int32_t count = mNodeArray.Length();
for (; idx < count; idx++) {
RefPtr<Text> node = mNodeArray[idx];
if (!node) {
// We ran out of ws nodes; must have been deleting to end
return NS_OK;
}
if (node == aStartNode) {
uint32_t len = node->Length();
if (uint32_t(aStartOffset) < len) {
nsresult rv =
mHTMLEditor->DeleteText(*node, AssertedCast<uint32_t>(aStartOffset),
len - aStartOffset);
NS_ENSURE_SUCCESS(rv, rv);
}
} else if (node == aEndNode) {
if (aEndOffset) {
nsresult rv =
mHTMLEditor->DeleteText(*node, 0, AssertedCast<uint32_t>(aEndOffset));
NS_ENSURE_SUCCESS(rv, rv);
}
break;
} else {
if (!range) {
range = new nsRange(aStartNode);
nsresult rv =
range->SetStartAndEnd(aStartNode, aStartOffset, aEndNode, aEndOffset);
NS_ENSURE_SUCCESS(rv, rv);
}
bool nodeBefore, nodeAfter;
nsresult rv =
nsRange::CompareNodeToRange(node, range, &nodeBefore, &nodeAfter);
NS_ENSURE_SUCCESS(rv, rv);
if (nodeAfter) {
break;
}
if (!nodeBefore) {
rv = mHTMLEditor->DeleteNode(node);
NS_ENSURE_SUCCESS(rv, rv);
mNodeArray.RemoveElement(node);
--count;
--idx;
}
}
}
return NS_OK;
}
WSRunObject::WSPoint
WSRunObject::GetCharAfter(nsINode* aNode,
int32_t aOffset)
{
MOZ_ASSERT(aNode);
int32_t idx = mNodeArray.IndexOf(aNode);
if (idx == -1) {
// Use range comparisons to get right ws node
return GetWSPointAfter(aNode, aOffset);
}
// Use WSPoint version of GetCharAfter()
return GetCharAfter(WSPoint(mNodeArray[idx], aOffset, 0));
}
WSRunObject::WSPoint
WSRunObject::GetCharBefore(nsINode* aNode,
int32_t aOffset)
{
MOZ_ASSERT(aNode);
int32_t idx = mNodeArray.IndexOf(aNode);
if (idx == -1) {
// Use range comparisons to get right ws node
return GetWSPointBefore(aNode, aOffset);
}
// Use WSPoint version of GetCharBefore()
return GetCharBefore(WSPoint(mNodeArray[idx], aOffset, 0));
}
WSRunObject::WSPoint
WSRunObject::GetCharAfter(const WSPoint &aPoint)
{
MOZ_ASSERT(aPoint.mTextNode);
WSPoint outPoint;
outPoint.mTextNode = nullptr;
outPoint.mOffset = 0;
outPoint.mChar = 0;
int32_t idx = mNodeArray.IndexOf(aPoint.mTextNode);
if (idx == -1) {
// Can't find point, but it's not an error
return outPoint;
}
if (static_cast<uint16_t>(aPoint.mOffset) < aPoint.mTextNode->TextLength()) {
outPoint = aPoint;
outPoint.mChar = GetCharAt(aPoint.mTextNode, aPoint.mOffset);
return outPoint;
}
int32_t numNodes = mNodeArray.Length();
if (idx + 1 < numNodes) {
outPoint.mTextNode = mNodeArray[idx + 1];
MOZ_ASSERT(outPoint.mTextNode);
outPoint.mOffset = 0;
outPoint.mChar = GetCharAt(outPoint.mTextNode, 0);
}
return outPoint;
}
WSRunObject::WSPoint
WSRunObject::GetCharBefore(const WSPoint &aPoint)
{
MOZ_ASSERT(aPoint.mTextNode);
WSPoint outPoint;
outPoint.mTextNode = nullptr;
outPoint.mOffset = 0;
outPoint.mChar = 0;
int32_t idx = mNodeArray.IndexOf(aPoint.mTextNode);
if (idx == -1) {
// Can't find point, but it's not an error
return outPoint;
}
if (aPoint.mOffset) {
outPoint = aPoint;
outPoint.mOffset--;
outPoint.mChar = GetCharAt(aPoint.mTextNode, aPoint.mOffset - 1);
return outPoint;
}
if (idx) {
outPoint.mTextNode = mNodeArray[idx - 1];
uint32_t len = outPoint.mTextNode->TextLength();
if (len) {
outPoint.mOffset = len - 1;
outPoint.mChar = GetCharAt(outPoint.mTextNode, len - 1);
}
}
return outPoint;
}
nsresult
WSRunObject::ConvertToNBSP(WSPoint aPoint)
{
// MOOSE: this routine needs to be modified to preserve the integrity of the
// wsFragment info.
NS_ENSURE_TRUE(aPoint.mTextNode, NS_ERROR_NULL_POINTER);
// First, insert an nbsp
AutoTransactionsConserveSelection dontChangeMySelection(mHTMLEditor);
nsAutoString nbspStr(nbsp);
nsresult rv =
mHTMLEditor->InsertTextIntoTextNodeImpl(nbspStr, *aPoint.mTextNode,
aPoint.mOffset, true);
NS_ENSURE_SUCCESS(rv, rv);
// Next, find range of ws it will replace
RefPtr<Text> startNode, endNode;
int32_t startOffset = 0, endOffset = 0;
GetAsciiWSBounds(eAfter, aPoint.mTextNode, aPoint.mOffset + 1,
getter_AddRefs(startNode), &startOffset,
getter_AddRefs(endNode), &endOffset);
// Finally, delete that replaced ws, if any
if (startNode) {
rv = DeleteChars(startNode, startOffset, endNode, endOffset);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
void
WSRunObject::GetAsciiWSBounds(int16_t aDir,
nsINode* aNode,
int32_t aOffset,
Text** outStartNode,
int32_t* outStartOffset,
Text** outEndNode,
int32_t* outEndOffset)
{
MOZ_ASSERT(aNode && outStartNode && outStartOffset && outEndNode &&
outEndOffset);
RefPtr<Text> startNode, endNode;
int32_t startOffset = 0, endOffset = 0;
if (aDir & eAfter) {
WSPoint point = GetCharAfter(aNode, aOffset);
if (point.mTextNode) {
// We found a text node, at least
startNode = endNode = point.mTextNode;
startOffset = endOffset = point.mOffset;
// Scan ahead to end of ASCII ws
for (; nsCRT::IsAsciiSpace(point.mChar) && point.mTextNode;
point = GetCharAfter(point)) {
endNode = point.mTextNode;
// endOffset is _after_ ws
point.mOffset++;
endOffset = point.mOffset;
}
}
}
if (aDir & eBefore) {
WSPoint point = GetCharBefore(aNode, aOffset);
if (point.mTextNode) {
// We found a text node, at least
startNode = point.mTextNode;
startOffset = point.mOffset + 1;
if (!endNode) {
endNode = startNode;
endOffset = startOffset;
}
// Scan back to start of ASCII ws
for (; nsCRT::IsAsciiSpace(point.mChar) && point.mTextNode;
point = GetCharBefore(point)) {
startNode = point.mTextNode;
startOffset = point.mOffset;
}
}
}
startNode.forget(outStartNode);
*outStartOffset = startOffset;
endNode.forget(outEndNode);
*outEndOffset = endOffset;
}
/**
* Given a dompoint, find the ws run that is before or after it, as caller
* needs
*/
void
WSRunObject::FindRun(nsINode* aNode,
int32_t aOffset,
WSFragment** outRun,
bool after)
{
MOZ_ASSERT(aNode && outRun);
*outRun = nullptr;
for (WSFragment* run = mStartRun; run; run = run->mRight) {
int32_t comp = run->mStartNode ? nsContentUtils::ComparePoints(aNode,
aOffset, run->mStartNode, run->mStartOffset) : -1;
if (comp <= 0) {
if (after) {
*outRun = run;
} else {
// before
*outRun = nullptr;
}
return;
}
comp = run->mEndNode ? nsContentUtils::ComparePoints(aNode, aOffset,
run->mEndNode, run->mEndOffset) : -1;
if (comp < 0) {
*outRun = run;
return;
} else if (!comp) {
if (after) {
*outRun = run->mRight;
} else {
// before
*outRun = run;
}
return;
}
if (!run->mRight) {
if (after) {
*outRun = nullptr;
} else {
// before
*outRun = run;
}
return;
}
}
}
char16_t
WSRunObject::GetCharAt(Text* aTextNode,
int32_t aOffset)
{
// return 0 if we can't get a char, for whatever reason
NS_ENSURE_TRUE(aTextNode, 0);
int32_t len = int32_t(aTextNode->TextLength());
if (aOffset < 0 || aOffset >= len) {
return 0;
}
return aTextNode->GetText()->CharAt(aOffset);
}
WSRunObject::WSPoint
WSRunObject::GetWSPointAfter(nsINode* aNode,
int32_t aOffset)
{
// Note: only to be called if aNode is not a ws node.
// Binary search on wsnodes
uint32_t numNodes = mNodeArray.Length();
if (!numNodes) {
// Do nothing if there are no nodes to search
WSPoint outPoint;
return outPoint;
}
uint32_t firstNum = 0, curNum = numNodes/2, lastNum = numNodes;
int16_t cmp = 0;
RefPtr<Text> curNode;
// Begin binary search. We do this because we need to minimize calls to
// ComparePoints(), which is expensive.
while (curNum != lastNum) {
curNode = mNodeArray[curNum];
cmp = nsContentUtils::ComparePoints(aNode, aOffset, curNode, 0);
if (cmp < 0) {
lastNum = curNum;
} else {
firstNum = curNum + 1;
}
curNum = (lastNum - firstNum)/2 + firstNum;
MOZ_ASSERT(firstNum <= curNum && curNum <= lastNum, "Bad binary search");
}
// When the binary search is complete, we always know that the current node
// is the same as the end node, which is always past our range. Therefore,
// we've found the node immediately after the point of interest.
if (curNum == mNodeArray.Length()) {
// hey asked for past our range (it's after the last node). GetCharAfter
// will do the work for us when we pass it the last index of the last node.
RefPtr<Text> textNode(mNodeArray[curNum - 1]);
WSPoint point(textNode, textNode->TextLength(), 0);
return GetCharAfter(point);
} else {
// The char after the point is the first character of our range.
RefPtr<Text> textNode(mNodeArray[curNum]);
WSPoint point(textNode, 0, 0);
return GetCharAfter(point);
}
}
WSRunObject::WSPoint
WSRunObject::GetWSPointBefore(nsINode* aNode,
int32_t aOffset)
{
// Note: only to be called if aNode is not a ws node.
// Binary search on wsnodes
uint32_t numNodes = mNodeArray.Length();
if (!numNodes) {
// Do nothing if there are no nodes to search
WSPoint outPoint;
return outPoint;
}
uint32_t firstNum = 0, curNum = numNodes/2, lastNum = numNodes;
int16_t cmp = 0;
RefPtr<Text> curNode;
// Begin binary search. We do this because we need to minimize calls to
// ComparePoints(), which is expensive.
while (curNum != lastNum) {
curNode = mNodeArray[curNum];
cmp = nsContentUtils::ComparePoints(aNode, aOffset, curNode, 0);
if (cmp < 0) {
lastNum = curNum;
} else {
firstNum = curNum + 1;
}
curNum = (lastNum - firstNum)/2 + firstNum;
MOZ_ASSERT(firstNum <= curNum && curNum <= lastNum, "Bad binary search");
}
// When the binary search is complete, we always know that the current node
// is the same as the end node, which is always past our range. Therefore,
// we've found the node immediately after the point of interest.
if (curNum == mNodeArray.Length()) {
// Get the point before the end of the last node, we can pass the length of
// the node into GetCharBefore, and it will return the last character.
RefPtr<Text> textNode(mNodeArray[curNum - 1]);
WSPoint point(textNode, textNode->TextLength(), 0);
return GetCharBefore(point);
} else {
// We can just ask the current node for the point immediately before it,
// it will handle moving to the previous node (if any) and returning the
// appropriate character
RefPtr<Text> textNode(mNodeArray[curNum]);
WSPoint point(textNode, 0, 0);
return GetCharBefore(point);
}
}
nsresult
WSRunObject::CheckTrailingNBSPOfRun(WSFragment *aRun)
{
// Try to change an nbsp to a space, if possible, just to prevent nbsp
// proliferation. Examine what is before and after the trailing nbsp, if
// any.
NS_ENSURE_TRUE(aRun, NS_ERROR_NULL_POINTER);
bool leftCheck = false;
bool spaceNBSP = false;
bool rightCheck = false;
// confirm run is normalWS
if (aRun->mType != WSType::normalWS) {
return NS_ERROR_FAILURE;
}
// first check for trailing nbsp
WSPoint thePoint = GetCharBefore(aRun->mEndNode, aRun->mEndOffset);
if (thePoint.mTextNode && thePoint.mChar == nbsp) {
// now check that what is to the left of it is compatible with replacing nbsp with space
WSPoint prevPoint = GetCharBefore(thePoint);
if (prevPoint.mTextNode) {
if (!nsCRT::IsAsciiSpace(prevPoint.mChar)) {
leftCheck = true;
} else {
spaceNBSP = true;
}
} else if (aRun->mLeftType == WSType::text ||
aRun->mLeftType == WSType::special) {
leftCheck = true;
}
if (leftCheck || spaceNBSP) {
// now check that what is to the right of it is compatible with replacing
// nbsp with space
if (aRun->mRightType == WSType::text ||
aRun->mRightType == WSType::special ||
aRun->mRightType == WSType::br) {
rightCheck = true;
}
if ((aRun->mRightType & WSType::block) &&
IsBlockNode(GetWSBoundingParent())) {
// We are at a block boundary. Insert a <br>. Why? Well, first note
// that the br will have no visible effect since it is up against a
// block boundary. |foo<br><p>bar| renders like |foo<p>bar| and
// similarly |<p>foo<br></p>bar| renders like |<p>foo</p>bar|. What
// this <br> addition gets us is the ability to convert a trailing nbsp
// to a space. Consider: |<body>foo. '</body>|, where ' represents
// selection. User types space attempting to put 2 spaces after the
// end of their sentence. We used to do this as: |<body>foo.
// &nbsp</body>| This caused problems with soft wrapping: the nbsp
// would wrap to the next line, which looked attrocious. If you try to
// do: |<body>foo.&nbsp </body>| instead, the trailing space is
// invisible because it is against a block boundary. If you do:
// |<body>foo.&nbsp&nbsp</body>| then you get an even uglier soft
// wrapping problem, where foo is on one line until you type the final
// space, and then "foo " jumps down to the next line. Ugh. The best
// way I can find out of this is to throw in a harmless <br> here,
// which allows us to do: |<body>foo.&nbsp <br></body>|, which doesn't
// cause foo to jump lines, doesn't cause spaces to show up at the
// beginning of soft wrapped lines, and lets the user see 2 spaces when
// they type 2 spaces.
nsCOMPtr<Element> brNode =
mHTMLEditor->CreateBR(aRun->mEndNode, aRun->mEndOffset);
NS_ENSURE_TRUE(brNode, NS_ERROR_FAILURE);
// Refresh thePoint, prevPoint
thePoint = GetCharBefore(aRun->mEndNode, aRun->mEndOffset);
prevPoint = GetCharBefore(thePoint);
rightCheck = true;
}
}
if (leftCheck && rightCheck) {
// Now replace nbsp with space. First, insert a space
AutoTransactionsConserveSelection dontChangeMySelection(mHTMLEditor);
nsAutoString spaceStr(char16_t(32));
nsresult rv =
mHTMLEditor->InsertTextIntoTextNodeImpl(spaceStr, *thePoint.mTextNode,
thePoint.mOffset, true);
NS_ENSURE_SUCCESS(rv, rv);
// Finally, delete that nbsp
rv = DeleteChars(thePoint.mTextNode, thePoint.mOffset + 1,
thePoint.mTextNode, thePoint.mOffset + 2);
NS_ENSURE_SUCCESS(rv, rv);
} else if (!mPRE && spaceNBSP && rightCheck) {
// Don't mess with this preformatted for now. We have a run of ASCII
// whitespace (which will render as one space) followed by an nbsp (which
// is at the end of the whitespace run). Let's switch their order. This
// will ensure that if someone types two spaces after a sentence, and the
// editor softwraps at this point, the spaces won't be split across lines,
// which looks ugly and is bad for the moose.
RefPtr<Text> startNode, endNode;
int32_t startOffset, endOffset;
GetAsciiWSBounds(eBoth, prevPoint.mTextNode, prevPoint.mOffset + 1,
getter_AddRefs(startNode), &startOffset,
getter_AddRefs(endNode), &endOffset);
// Delete that nbsp
nsresult rv = DeleteChars(thePoint.mTextNode, thePoint.mOffset,
thePoint.mTextNode, thePoint.mOffset + 1);
NS_ENSURE_SUCCESS(rv, rv);
// Finally, insert that nbsp before the ASCII ws run
AutoTransactionsConserveSelection dontChangeMySelection(mHTMLEditor);
nsAutoString nbspStr(nbsp);
rv = mHTMLEditor->InsertTextIntoTextNodeImpl(nbspStr, *startNode,
startOffset, true);
NS_ENSURE_SUCCESS(rv, rv);
}
}
return NS_OK;
}
nsresult
WSRunObject::CheckTrailingNBSP(WSFragment* aRun,
nsINode* aNode,
int32_t aOffset)
{
// Try to change an nbsp to a space, if possible, just to prevent nbsp
// proliferation. This routine is called when we are about to make this
// point in the ws abut an inserted break or text, so we don't have to worry
// about what is after it. What is after it now will end up after the
// inserted object.
NS_ENSURE_TRUE(aRun && aNode, NS_ERROR_NULL_POINTER);
bool canConvert = false;
WSPoint thePoint = GetCharBefore(aNode, aOffset);
if (thePoint.mTextNode && thePoint.mChar == nbsp) {
WSPoint prevPoint = GetCharBefore(thePoint);
if (prevPoint.mTextNode) {
if (!nsCRT::IsAsciiSpace(prevPoint.mChar)) {
canConvert = true;
}
} else if (aRun->mLeftType == WSType::text ||
aRun->mLeftType == WSType::special) {
canConvert = true;
}
}
if (canConvert) {
// First, insert a space
AutoTransactionsConserveSelection dontChangeMySelection(mHTMLEditor);
nsAutoString spaceStr(char16_t(32));
nsresult rv =
mHTMLEditor->InsertTextIntoTextNodeImpl(spaceStr, *thePoint.mTextNode,
thePoint.mOffset, true);
NS_ENSURE_SUCCESS(rv, rv);
// Finally, delete that nbsp
rv = DeleteChars(thePoint.mTextNode, thePoint.mOffset + 1,
thePoint.mTextNode, thePoint.mOffset + 2);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
nsresult
WSRunObject::CheckLeadingNBSP(WSFragment* aRun,
nsINode* aNode,
int32_t aOffset)
{
// Try to change an nbsp to a space, if possible, just to prevent nbsp
// proliferation This routine is called when we are about to make this point
// in the ws abut an inserted text, so we don't have to worry about what is
// before it. What is before it now will end up before the inserted text.
bool canConvert = false;
WSPoint thePoint = GetCharAfter(aNode, aOffset);
if (thePoint.mChar == nbsp) {
WSPoint tmp = thePoint;
// we want to be after thePoint
tmp.mOffset++;
WSPoint nextPoint = GetCharAfter(tmp);
if (nextPoint.mTextNode) {
if (!nsCRT::IsAsciiSpace(nextPoint.mChar)) {
canConvert = true;
}
} else if (aRun->mRightType == WSType::text ||
aRun->mRightType == WSType::special ||
aRun->mRightType == WSType::br) {
canConvert = true;
}
}
if (canConvert) {
// First, insert a space
AutoTransactionsConserveSelection dontChangeMySelection(mHTMLEditor);
nsAutoString spaceStr(char16_t(32));
nsresult rv =
mHTMLEditor->InsertTextIntoTextNodeImpl(spaceStr, *thePoint.mTextNode,
thePoint.mOffset, true);
NS_ENSURE_SUCCESS(rv, rv);
// Finally, delete that nbsp
rv = DeleteChars(thePoint.mTextNode, thePoint.mOffset + 1,
thePoint.mTextNode, thePoint.mOffset + 2);
NS_ENSURE_SUCCESS(rv, rv);
}
return NS_OK;
}
nsresult
WSRunObject::Scrub()
{
WSFragment *run = mStartRun;
while (run) {
if (run->mType & (WSType::leadingWS | WSType::trailingWS)) {
nsresult rv = DeleteChars(run->mStartNode, run->mStartOffset,
run->mEndNode, run->mEndOffset);
NS_ENSURE_SUCCESS(rv, rv);
}
run = run->mRight;
}
return NS_OK;
}
bool
WSRunObject::IsBlockNode(nsINode* aNode)
{
return aNode && aNode->IsElement() &&
HTMLEditor::NodeIsBlockStatic(aNode->AsElement());
}
} // namespace mozilla
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