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HTMLEditRules.cpp
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=2 sw=2 et tw=79: */
/* 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 "HTMLEditRules.h"
#include <stdlib.h>
#include "HTMLEditUtils.h"
#include "TextEditUtils.h"
#include "WSRunObject.h"
#include "mozilla/Assertions.h"
#include "mozilla/CSSEditUtils.h"
#include "mozilla/EditorUtils.h"
#include "mozilla/HTMLEditor.h"
#include "mozilla/MathAlgorithms.h"
#include "mozilla/Move.h"
#include "mozilla/Preferences.h"
#include "mozilla/UniquePtr.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/dom/Element.h"
#include "mozilla/OwningNonNull.h"
#include "mozilla/mozalloc.h"
#include "nsAString.h"
#include "nsAlgorithm.h"
#include "nsCRT.h"
#include "nsCRTGlue.h"
#include "nsComponentManagerUtils.h"
#include "nsContentUtils.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsGkAtoms.h"
#include "nsIAtom.h"
#include "nsIContent.h"
#include "nsIContentIterator.h"
#include "nsID.h"
#include "nsIDOMCharacterData.h"
#include "nsIDOMDocument.h"
#include "nsIDOMElement.h"
#include "nsIDOMNode.h"
#include "nsIDOMText.h"
#include "nsIFrame.h"
#include "nsIHTMLAbsPosEditor.h"
#include "nsIHTMLDocument.h"
#include "nsINode.h"
#include "nsLiteralString.h"
#include "nsRange.h"
#include "nsReadableUtils.h"
#include "nsString.h"
#include "nsStringFwd.h"
#include "nsTArray.h"
#include "nsTextNode.h"
#include "nsThreadUtils.h"
#include "nsUnicharUtils.h"
#include <algorithm>
// Workaround for windows headers
#ifdef SetProp
#undef SetProp
#endif
class nsISupports;
namespace mozilla {
class RulesInfo;
using namespace dom;
//const static char* kMOZEditorBogusNodeAttr="MOZ_EDITOR_BOGUS_NODE";
//const static char* kMOZEditorBogusNodeValue="TRUE";
enum
{
kLonely = 0,
kPrevSib = 1,
kNextSib = 2,
kBothSibs = 3
};
/********************************************************
* first some helpful functors we will use
********************************************************/
static bool IsBlockNode(const nsINode& node)
{
return HTMLEditor::NodeIsBlockStatic(&node);
}
static bool IsInlineNode(const nsINode& node)
{
return !IsBlockNode(node);
}
static bool
IsStyleCachePreservingAction(EditAction action)
{
return action == EditAction::deleteSelection ||
action == EditAction::insertBreak ||
action == EditAction::makeList ||
action == EditAction::indent ||
action == EditAction::outdent ||
action == EditAction::align ||
action == EditAction::makeBasicBlock ||
action == EditAction::removeList ||
action == EditAction::makeDefListItem ||
action == EditAction::insertElement ||
action == EditAction::insertQuotation;
}
static nsIAtom&
ParagraphSeparatorElement(ParagraphSeparator separator)
{
switch (separator) {
default:
MOZ_FALLTHROUGH_ASSERT("Unexpected paragraph separator!");
case ParagraphSeparator::div:
return *nsGkAtoms::div;
case ParagraphSeparator::p:
return *nsGkAtoms::p;
case ParagraphSeparator::br:
return *nsGkAtoms::br;
}
}
class TableCellAndListItemFunctor final : public BoolDomIterFunctor
{
public:
// Used to build list of all li's, td's & th's iterator covers
virtual bool operator()(nsINode* aNode) const
{
return HTMLEditUtils::IsTableCell(aNode) ||
HTMLEditUtils::IsListItem(aNode);
}
};
class BRNodeFunctor final : public BoolDomIterFunctor
{
public:
virtual bool operator()(nsINode* aNode) const
{
return aNode->IsHTMLElement(nsGkAtoms::br);
}
};
class EmptyEditableFunctor final : public BoolDomIterFunctor
{
public:
explicit EmptyEditableFunctor(HTMLEditor* aHTMLEditor)
: mHTMLEditor(aHTMLEditor)
{}
virtual bool operator()(nsINode* aNode) const
{
if (mHTMLEditor->IsEditable(aNode) &&
(HTMLEditUtils::IsListItem(aNode) ||
HTMLEditUtils::IsTableCellOrCaption(*aNode))) {
bool bIsEmptyNode;
nsresult rv =
mHTMLEditor->IsEmptyNode(aNode, &bIsEmptyNode, false, false);
NS_ENSURE_SUCCESS(rv, false);
if (bIsEmptyNode) {
return true;
}
}
return false;
}
protected:
HTMLEditor* mHTMLEditor;
};
/********************************************************
* mozilla::HTMLEditRules
********************************************************/
HTMLEditRules::HTMLEditRules()
: mHTMLEditor(nullptr)
, mListenerEnabled(false)
, mReturnInEmptyLIKillsList(false)
, mDidDeleteSelection(false)
, mDidRangedDelete(false)
, mRestoreContentEditableCount(false)
, mJoinOffset(0)
{
InitFields();
}
void
HTMLEditRules::InitFields()
{
mHTMLEditor = nullptr;
mDocChangeRange = nullptr;
mListenerEnabled = true;
mReturnInEmptyLIKillsList = true;
mDidDeleteSelection = false;
mDidRangedDelete = false;
mRestoreContentEditableCount = false;
mUtilRange = nullptr;
mJoinOffset = 0;
mNewBlock = nullptr;
mRangeItem = new RangeItem();
InitStyleCacheArray(mCachedStyles);
}
void
HTMLEditRules::InitStyleCacheArray(StyleCache aStyleCache[SIZE_STYLE_TABLE])
{
aStyleCache[0] = StyleCache(nsGkAtoms::b, EmptyString());
aStyleCache[1] = StyleCache(nsGkAtoms::i, EmptyString());
aStyleCache[2] = StyleCache(nsGkAtoms::u, EmptyString());
aStyleCache[3] = StyleCache(nsGkAtoms::font, NS_LITERAL_STRING("face"));
aStyleCache[4] = StyleCache(nsGkAtoms::font, NS_LITERAL_STRING("size"));
aStyleCache[5] = StyleCache(nsGkAtoms::font, NS_LITERAL_STRING("color"));
aStyleCache[6] = StyleCache(nsGkAtoms::tt, EmptyString());
aStyleCache[7] = StyleCache(nsGkAtoms::em, EmptyString());
aStyleCache[8] = StyleCache(nsGkAtoms::strong, EmptyString());
aStyleCache[9] = StyleCache(nsGkAtoms::dfn, EmptyString());
aStyleCache[10] = StyleCache(nsGkAtoms::code, EmptyString());
aStyleCache[11] = StyleCache(nsGkAtoms::samp, EmptyString());
aStyleCache[12] = StyleCache(nsGkAtoms::var, EmptyString());
aStyleCache[13] = StyleCache(nsGkAtoms::cite, EmptyString());
aStyleCache[14] = StyleCache(nsGkAtoms::abbr, EmptyString());
aStyleCache[15] = StyleCache(nsGkAtoms::acronym, EmptyString());
aStyleCache[16] = StyleCache(nsGkAtoms::backgroundColor, EmptyString());
aStyleCache[17] = StyleCache(nsGkAtoms::sub, EmptyString());
aStyleCache[18] = StyleCache(nsGkAtoms::sup, EmptyString());
}
HTMLEditRules::~HTMLEditRules()
{
// remove ourselves as a listener to edit actions
// In some cases, we have already been removed by
// ~HTMLEditor, in which case we will get a null pointer here
// which we ignore. But this allows us to add the ability to
// switch rule sets on the fly if we want.
if (mHTMLEditor) {
mHTMLEditor->RemoveEditActionListener(this);
}
}
NS_IMPL_ADDREF_INHERITED(HTMLEditRules, TextEditRules)
NS_IMPL_RELEASE_INHERITED(HTMLEditRules, TextEditRules)
NS_INTERFACE_TABLE_HEAD_CYCLE_COLLECTION_INHERITED(HTMLEditRules)
NS_INTERFACE_TABLE_INHERITED(HTMLEditRules, nsIEditActionListener)
NS_INTERFACE_TABLE_TAIL_INHERITING(TextEditRules)
NS_IMPL_CYCLE_COLLECTION_INHERITED(HTMLEditRules, TextEditRules,
mDocChangeRange, mUtilRange, mNewBlock,
mRangeItem)
NS_IMETHODIMP
HTMLEditRules::Init(TextEditor* aTextEditor)
{
if (NS_WARN_IF(!aTextEditor)) {
return NS_ERROR_INVALID_ARG;
}
InitFields();
mHTMLEditor = aTextEditor->AsHTMLEditor();
if (NS_WARN_IF(!mHTMLEditor)) {
return NS_ERROR_INVALID_ARG;
}
// call through to base class Init
nsresult rv = TextEditRules::Init(aTextEditor);
NS_ENSURE_SUCCESS(rv, rv);
// cache any prefs we care about
static const char kPrefName[] =
"editor.html.typing.returnInEmptyListItemClosesList";
nsAdoptingCString returnInEmptyLIKillsList =
Preferences::GetCString(kPrefName);
// only when "false", becomes FALSE. Otherwise (including empty), TRUE.
// XXX Why was this pref designed as a string and not bool?
mReturnInEmptyLIKillsList = !returnInEmptyLIKillsList.EqualsLiteral("false");
// make a utility range for use by the listenter
nsCOMPtr<nsINode> node = mHTMLEditor->GetRoot();
if (!node) {
node = mHTMLEditor->GetDocument();
}
NS_ENSURE_STATE(node);
mUtilRange = new nsRange(node);
// set up mDocChangeRange to be whole doc
// temporarily turn off rules sniffing
AutoLockRulesSniffing lockIt(this);
if (!mDocChangeRange) {
mDocChangeRange = new nsRange(node);
}
if (node->IsElement()) {
ErrorResult rv;
mDocChangeRange->SelectNode(*node, rv);
NS_ENSURE_TRUE(!rv.Failed(), rv.StealNSResult());
AdjustSpecialBreaks();
}
// add ourselves as a listener to edit actions
return mHTMLEditor->AddEditActionListener(this);
}
NS_IMETHODIMP
HTMLEditRules::DetachEditor()
{
if (mHTMLEditor) {
mHTMLEditor->RemoveEditActionListener(this);
}
mHTMLEditor = nullptr;
return TextEditRules::DetachEditor();
}
NS_IMETHODIMP
HTMLEditRules::BeforeEdit(EditAction action,
nsIEditor::EDirection aDirection)
{
if (mLockRulesSniffing) {
return NS_OK;
}
NS_ENSURE_STATE(mHTMLEditor);
RefPtr<HTMLEditor> htmlEditor(mHTMLEditor);
AutoLockRulesSniffing lockIt(this);
mDidExplicitlySetInterline = false;
if (!mActionNesting) {
mActionNesting++;
// Clear our flag about if just deleted a range
mDidRangedDelete = false;
// Remember where our selection was before edit action took place:
// Get selection
RefPtr<Selection> selection = htmlEditor->GetSelection();
// Get the selection location
if (NS_WARN_IF(!selection) || !selection->RangeCount()) {
return NS_ERROR_UNEXPECTED;
}
mRangeItem->startNode = selection->GetRangeAt(0)->GetStartParent();
mRangeItem->startOffset = selection->GetRangeAt(0)->StartOffset();
mRangeItem->endNode = selection->GetRangeAt(0)->GetEndParent();
mRangeItem->endOffset = selection->GetRangeAt(0)->EndOffset();
nsCOMPtr<nsINode> selStartNode = mRangeItem->startNode;
nsCOMPtr<nsINode> selEndNode = mRangeItem->endNode;
// Register with range updater to track this as we perturb the doc
htmlEditor->mRangeUpdater.RegisterRangeItem(mRangeItem);
// Clear deletion state bool
mDidDeleteSelection = false;
// Clear out mDocChangeRange and mUtilRange
if (mDocChangeRange) {
// Clear out our accounting of what changed
mDocChangeRange->Reset();
}
if (mUtilRange) {
// Ditto for mUtilRange.
mUtilRange->Reset();
}
// Remember current inline styles for deletion and normal insertion ops
if (action == EditAction::insertText ||
action == EditAction::insertIMEText ||
action == EditAction::deleteSelection ||
IsStyleCachePreservingAction(action)) {
nsCOMPtr<nsINode> selNode =
aDirection == nsIEditor::eNext ? selEndNode : selStartNode;
nsresult rv = CacheInlineStyles(GetAsDOMNode(selNode));
NS_ENSURE_SUCCESS(rv, rv);
}
// Stabilize the document against contenteditable count changes
nsCOMPtr<nsIDOMDocument> doc = htmlEditor->GetDOMDocument();
NS_ENSURE_TRUE(doc, NS_ERROR_NOT_INITIALIZED);
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(doc);
NS_ENSURE_TRUE(htmlDoc, NS_ERROR_FAILURE);
if (htmlDoc->GetEditingState() == nsIHTMLDocument::eContentEditable) {
htmlDoc->ChangeContentEditableCount(nullptr, +1);
mRestoreContentEditableCount = true;
}
// Check that selection is in subtree defined by body node
ConfirmSelectionInBody();
// Let rules remember the top level action
mTheAction = action;
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditRules::AfterEdit(EditAction action,
nsIEditor::EDirection aDirection)
{
if (mLockRulesSniffing) {
return NS_OK;
}
NS_ENSURE_STATE(mHTMLEditor);
RefPtr<HTMLEditor> htmlEditor(mHTMLEditor);
AutoLockRulesSniffing lockIt(this);
MOZ_ASSERT(mActionNesting > 0);
nsresult rv = NS_OK;
mActionNesting--;
if (!mActionNesting) {
// Do all the tricky stuff
rv = AfterEditInner(action, aDirection);
// Free up selectionState range item
htmlEditor->mRangeUpdater.DropRangeItem(mRangeItem);
// Reset the contenteditable count to its previous value
if (mRestoreContentEditableCount) {
nsCOMPtr<nsIDOMDocument> doc = htmlEditor->GetDOMDocument();
NS_ENSURE_TRUE(doc, NS_ERROR_NOT_INITIALIZED);
nsCOMPtr<nsIHTMLDocument> htmlDoc = do_QueryInterface(doc);
NS_ENSURE_TRUE(htmlDoc, NS_ERROR_FAILURE);
if (htmlDoc->GetEditingState() == nsIHTMLDocument::eContentEditable) {
htmlDoc->ChangeContentEditableCount(nullptr, -1);
}
mRestoreContentEditableCount = false;
}
}
NS_ENSURE_SUCCESS(rv, rv);
return NS_OK;
}
nsresult
HTMLEditRules::AfterEditInner(EditAction action,
nsIEditor::EDirection aDirection)
{
ConfirmSelectionInBody();
if (action == EditAction::ignore) {
return NS_OK;
}
NS_ENSURE_STATE(mHTMLEditor);
RefPtr<Selection> selection = mHTMLEditor->GetSelection();
NS_ENSURE_STATE(selection);
nsCOMPtr<nsIDOMNode> rangeStartParent, rangeEndParent;
int32_t rangeStartOffset = 0, rangeEndOffset = 0;
// do we have a real range to act on?
bool bDamagedRange = false;
if (mDocChangeRange) {
mDocChangeRange->GetStartContainer(getter_AddRefs(rangeStartParent));
mDocChangeRange->GetEndContainer(getter_AddRefs(rangeEndParent));
mDocChangeRange->GetStartOffset(&rangeStartOffset);
mDocChangeRange->GetEndOffset(&rangeEndOffset);
if (rangeStartParent && rangeEndParent)
bDamagedRange = true;
}
if (bDamagedRange && !((action == EditAction::undo) ||
(action == EditAction::redo))) {
// don't let any txns in here move the selection around behind our back.
// Note that this won't prevent explicit selection setting from working.
NS_ENSURE_STATE(mHTMLEditor);
AutoTransactionsConserveSelection dontSpazMySelection(mHTMLEditor);
// expand the "changed doc range" as needed
PromoteRange(*mDocChangeRange, action);
// if we did a ranged deletion or handling backspace key, make sure we have
// a place to put caret.
// Note we only want to do this if the overall operation was deletion,
// not if deletion was done along the way for EditAction::loadHTML, EditAction::insertText, etc.
// That's why this is here rather than DidDeleteSelection().
if (action == EditAction::deleteSelection && mDidRangedDelete) {
nsresult rv = InsertBRIfNeeded(selection);
NS_ENSURE_SUCCESS(rv, rv);
}
// add in any needed <br>s, and remove any unneeded ones.
AdjustSpecialBreaks();
// merge any adjacent text nodes
if (action != EditAction::insertText &&
action != EditAction::insertIMEText) {
NS_ENSURE_STATE(mHTMLEditor);
nsresult rv = mHTMLEditor->CollapseAdjacentTextNodes(mDocChangeRange);
NS_ENSURE_SUCCESS(rv, rv);
}
// clean up any empty nodes in the selection
nsresult rv = RemoveEmptyNodes();
NS_ENSURE_SUCCESS(rv, rv);
// attempt to transform any unneeded nbsp's into spaces after doing various operations
if (action == EditAction::insertText ||
action == EditAction::insertIMEText ||
action == EditAction::deleteSelection ||
action == EditAction::insertBreak ||
action == EditAction::htmlPaste ||
action == EditAction::loadHTML) {
rv = AdjustWhitespace(selection);
NS_ENSURE_SUCCESS(rv, rv);
// also do this for original selection endpoints.
NS_ENSURE_STATE(mHTMLEditor);
NS_ENSURE_STATE(mRangeItem->startNode);
NS_ENSURE_STATE(mRangeItem->endNode);
WSRunObject(mHTMLEditor, mRangeItem->startNode,
mRangeItem->startOffset).AdjustWhitespace();
// we only need to handle old selection endpoint if it was different from start
if (mRangeItem->startNode != mRangeItem->endNode ||
mRangeItem->startOffset != mRangeItem->endOffset) {
NS_ENSURE_STATE(mHTMLEditor);
WSRunObject(mHTMLEditor, mRangeItem->endNode,
mRangeItem->endOffset).AdjustWhitespace();
}
}
// if we created a new block, make sure selection lands in it
if (mNewBlock) {
rv = PinSelectionToNewBlock(selection);
mNewBlock = nullptr;
}
// adjust selection for insert text, html paste, and delete actions
if (action == EditAction::insertText ||
action == EditAction::insertIMEText ||
action == EditAction::deleteSelection ||
action == EditAction::insertBreak ||
action == EditAction::htmlPaste ||
action == EditAction::loadHTML) {
rv = AdjustSelection(selection, aDirection);
NS_ENSURE_SUCCESS(rv, rv);
}
// check for any styles which were removed inappropriately
if (action == EditAction::insertText ||
action == EditAction::insertIMEText ||
action == EditAction::deleteSelection ||
IsStyleCachePreservingAction(action)) {
NS_ENSURE_STATE(mHTMLEditor);
mHTMLEditor->mTypeInState->UpdateSelState(selection);
rv = ReapplyCachedStyles();
NS_ENSURE_SUCCESS(rv, rv);
ClearCachedStyles();
}
}
NS_ENSURE_STATE(mHTMLEditor);
nsresult rv =
mHTMLEditor->HandleInlineSpellCheck(action, selection,
GetAsDOMNode(mRangeItem->startNode),
mRangeItem->startOffset,
rangeStartParent, rangeStartOffset,
rangeEndParent, rangeEndOffset);
NS_ENSURE_SUCCESS(rv, rv);
// detect empty doc
rv = CreateBogusNodeIfNeeded(selection);
NS_ENSURE_SUCCESS(rv, rv);
// adjust selection HINT if needed
if (!mDidExplicitlySetInterline) {
CheckInterlinePosition(*selection);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditRules::WillDoAction(Selection* aSelection,
RulesInfo* aInfo,
bool* aCancel,
bool* aHandled)
{
MOZ_ASSERT(aInfo && aCancel && aHandled);
*aCancel = false;
*aHandled = false;
// my kingdom for dynamic cast
TextRulesInfo* info = static_cast<TextRulesInfo*>(aInfo);
// Deal with actions for which we don't need to check whether the selection is
// editable.
if (info->action == EditAction::outputText ||
info->action == EditAction::undo ||
info->action == EditAction::redo) {
return TextEditRules::WillDoAction(aSelection, aInfo, aCancel, aHandled);
}
// Nothing to do if there's no selection to act on
if (!aSelection) {
return NS_OK;
}
NS_ENSURE_TRUE(aSelection->RangeCount(), NS_OK);
RefPtr<nsRange> range = aSelection->GetRangeAt(0);
nsCOMPtr<nsINode> selStartNode = range->GetStartParent();
NS_ENSURE_STATE(mHTMLEditor);
if (!mHTMLEditor->IsModifiableNode(selStartNode)) {
*aCancel = true;
return NS_OK;
}
nsCOMPtr<nsINode> selEndNode = range->GetEndParent();
if (selStartNode != selEndNode) {
NS_ENSURE_STATE(mHTMLEditor);
if (!mHTMLEditor->IsModifiableNode(selEndNode)) {
*aCancel = true;
return NS_OK;
}
NS_ENSURE_STATE(mHTMLEditor);
if (!mHTMLEditor->IsModifiableNode(range->GetCommonAncestor())) {
*aCancel = true;
return NS_OK;
}
}
switch (info->action) {
case EditAction::insertText:
case EditAction::insertIMEText:
UndefineCaretBidiLevel(aSelection);
return WillInsertText(info->action, aSelection, aCancel, aHandled,
info->inString, info->outString, info->maxLength);
case EditAction::loadHTML:
return WillLoadHTML(aSelection, aCancel);
case EditAction::insertBreak:
UndefineCaretBidiLevel(aSelection);
return WillInsertBreak(*aSelection, aCancel, aHandled);
case EditAction::deleteSelection:
return WillDeleteSelection(aSelection, info->collapsedAction,
info->stripWrappers, aCancel, aHandled);
case EditAction::makeList:
return WillMakeList(aSelection, info->blockType, info->entireList,
info->bulletType, aCancel, aHandled);
case EditAction::indent:
return WillIndent(aSelection, aCancel, aHandled);
case EditAction::outdent:
return WillOutdent(*aSelection, aCancel, aHandled);
case EditAction::setAbsolutePosition:
return WillAbsolutePosition(*aSelection, aCancel, aHandled);
case EditAction::removeAbsolutePosition:
return WillRemoveAbsolutePosition(aSelection, aCancel, aHandled);
case EditAction::align:
return WillAlign(*aSelection, *info->alignType, aCancel, aHandled);
case EditAction::makeBasicBlock:
return WillMakeBasicBlock(*aSelection, *info->blockType, aCancel,
aHandled);
case EditAction::removeList:
return WillRemoveList(aSelection, info->bOrdered, aCancel, aHandled);
case EditAction::makeDefListItem:
return WillMakeDefListItem(aSelection, info->blockType, info->entireList,
aCancel, aHandled);
case EditAction::insertElement:
WillInsert(*aSelection, aCancel);
return NS_OK;
case EditAction::decreaseZIndex:
return WillRelativeChangeZIndex(aSelection, -1, aCancel, aHandled);
case EditAction::increaseZIndex:
return WillRelativeChangeZIndex(aSelection, 1, aCancel, aHandled);
default:
return TextEditRules::WillDoAction(aSelection, aInfo,
aCancel, aHandled);
}
}
NS_IMETHODIMP
HTMLEditRules::DidDoAction(Selection* aSelection,
RulesInfo* aInfo,
nsresult aResult)
{
TextRulesInfo* info = static_cast<TextRulesInfo*>(aInfo);
switch (info->action) {
case EditAction::insertBreak:
return DidInsertBreak(aSelection, aResult);
case EditAction::deleteSelection:
return DidDeleteSelection(aSelection, info->collapsedAction, aResult);
case EditAction::makeBasicBlock:
case EditAction::indent:
case EditAction::outdent:
case EditAction::align:
return DidMakeBasicBlock(aSelection, aInfo, aResult);
case EditAction::setAbsolutePosition: {
nsresult rv = DidMakeBasicBlock(aSelection, aInfo, aResult);
NS_ENSURE_SUCCESS(rv, rv);
return DidAbsolutePosition();
}
default:
// pass through to TextEditRules
return TextEditRules::DidDoAction(aSelection, aInfo, aResult);
}
}
nsresult
HTMLEditRules::GetListState(bool* aMixed,
bool* aOL,
bool* aUL,
bool* aDL)
{
NS_ENSURE_TRUE(aMixed && aOL && aUL && aDL, NS_ERROR_NULL_POINTER);
*aMixed = false;
*aOL = false;
*aUL = false;
*aDL = false;
bool bNonList = false;
nsTArray<OwningNonNull<nsINode>> arrayOfNodes;
nsresult rv = GetListActionNodes(arrayOfNodes, EntireList::no,
TouchContent::no);
NS_ENSURE_SUCCESS(rv, rv);
// Examine list type for nodes in selection.
for (const auto& curNode : arrayOfNodes) {
if (!curNode->IsElement()) {
bNonList = true;
} else if (curNode->IsHTMLElement(nsGkAtoms::ul)) {
*aUL = true;
} else if (curNode->IsHTMLElement(nsGkAtoms::ol)) {
*aOL = true;
} else if (curNode->IsHTMLElement(nsGkAtoms::li)) {
if (dom::Element* parent = curNode->GetParentElement()) {
if (parent->IsHTMLElement(nsGkAtoms::ul)) {
*aUL = true;
} else if (parent->IsHTMLElement(nsGkAtoms::ol)) {
*aOL = true;
}
}
} else if (curNode->IsAnyOfHTMLElements(nsGkAtoms::dl,
nsGkAtoms::dt,
nsGkAtoms::dd)) {
*aDL = true;
} else {
bNonList = true;
}
}
// hokey arithmetic with booleans
if ((*aUL + *aOL + *aDL + bNonList) > 1) {
*aMixed = true;
}
return NS_OK;
}
nsresult
HTMLEditRules::GetListItemState(bool* aMixed,
bool* aLI,
bool* aDT,
bool* aDD)
{
NS_ENSURE_TRUE(aMixed && aLI && aDT && aDD, NS_ERROR_NULL_POINTER);
*aMixed = false;
*aLI = false;
*aDT = false;
*aDD = false;
bool bNonList = false;
nsTArray<OwningNonNull<nsINode>> arrayOfNodes;
nsresult rv = GetListActionNodes(arrayOfNodes, EntireList::no,
TouchContent::no);
NS_ENSURE_SUCCESS(rv, rv);
// examine list type for nodes in selection
for (const auto& node : arrayOfNodes) {
if (!node->IsElement()) {
bNonList = true;
} else if (node->IsAnyOfHTMLElements(nsGkAtoms::ul,
nsGkAtoms::ol,
nsGkAtoms::li)) {
*aLI = true;
} else if (node->IsHTMLElement(nsGkAtoms::dt)) {
*aDT = true;
} else if (node->IsHTMLElement(nsGkAtoms::dd)) {
*aDD = true;
} else if (node->IsHTMLElement(nsGkAtoms::dl)) {
// need to look inside dl and see which types of items it has
bool bDT, bDD;
GetDefinitionListItemTypes(node->AsElement(), &bDT, &bDD);
*aDT |= bDT;
*aDD |= bDD;
} else {
bNonList = true;
}
}
// hokey arithmetic with booleans
if (*aDT + *aDD + bNonList > 1) {
*aMixed = true;
}
return NS_OK;
}
nsresult
HTMLEditRules::GetAlignment(bool* aMixed,
nsIHTMLEditor::EAlignment* aAlign)
{
MOZ_ASSERT(aMixed && aAlign);
NS_ENSURE_STATE(mHTMLEditor);
RefPtr<HTMLEditor> htmlEditor(mHTMLEditor);
// For now, just return first alignment. We'll lie about if it's mixed.
// This is for efficiency given that our current ui doesn't care if it's
// mixed.
// cmanske: NOT TRUE! We would like to pay attention to mixed state in Format
// | Align submenu!
// This routine assumes that alignment is done ONLY via divs
// Default alignment is left
*aMixed = false;
*aAlign = nsIHTMLEditor::eLeft;
// Get selection
NS_ENSURE_STATE(htmlEditor->GetSelection());
OwningNonNull<Selection> selection = *htmlEditor->GetSelection();
// Get selection location
NS_ENSURE_TRUE(htmlEditor->GetRoot(), NS_ERROR_FAILURE);
OwningNonNull<Element> root = *htmlEditor->GetRoot();
int32_t rootOffset = root->GetParentNode() ?
root->GetParentNode()->IndexOf(root) : -1;
NS_ENSURE_STATE(selection->GetRangeAt(0) &&
selection->GetRangeAt(0)->GetStartParent());
OwningNonNull<nsINode> parent = *selection->GetRangeAt(0)->GetStartParent();
int32_t offset = selection->GetRangeAt(0)->StartOffset();
// Is the selection collapsed?
nsCOMPtr<nsINode> nodeToExamine;
if (selection->Collapsed() || parent->GetAsText()) {
// If selection is collapsed, we want to look at 'parent' and its ancestors
// for divs with alignment on them. If we are in a text node, then that is
// the node of interest.
nodeToExamine = parent;
} else if (parent->IsHTMLElement(nsGkAtoms::html) && offset == rootOffset) {
// If we have selected the body, let's look at the first editable node
nodeToExamine = htmlEditor->GetNextNode(parent, offset, true);
} else {
nsTArray<RefPtr<nsRange>> arrayOfRanges;
GetPromotedRanges(selection, arrayOfRanges, EditAction::align);
// Use these ranges to construct a list of nodes to act on.
nsTArray<OwningNonNull<nsINode>> arrayOfNodes;
nsresult rv = GetNodesForOperation(arrayOfRanges, arrayOfNodes,
EditAction::align, TouchContent::no);
NS_ENSURE_SUCCESS(rv, rv);
nodeToExamine = arrayOfNodes.SafeElementAt(0);
}
NS_ENSURE_TRUE(nodeToExamine, NS_ERROR_NULL_POINTER);
nsCOMPtr<Element> blockParent = htmlEditor->GetBlock(*nodeToExamine);
NS_ENSURE_TRUE(blockParent, NS_ERROR_FAILURE);
if (htmlEditor->IsCSSEnabled() &&
htmlEditor->mCSSEditUtils->IsCSSEditableProperty(blockParent, nullptr,
nsGkAtoms::align)) {
// We are in CSS mode and we know how to align this element with CSS
nsAutoString value;
// Let's get the value(s) of text-align or margin-left/margin-right
htmlEditor->mCSSEditUtils->GetCSSEquivalentToHTMLInlineStyleSet(
blockParent, nullptr, nsGkAtoms::align, value, CSSEditUtils::eComputed);
if (value.EqualsLiteral("center") ||
value.EqualsLiteral("-moz-center") ||
value.EqualsLiteral("auto auto")) {
*aAlign = nsIHTMLEditor::eCenter;
return NS_OK;
}
if (value.EqualsLiteral("right") ||
value.EqualsLiteral("-moz-right") ||
value.EqualsLiteral("auto 0px")) {
*aAlign = nsIHTMLEditor::eRight;
return NS_OK;
}
if (value.EqualsLiteral("justify")) {
*aAlign = nsIHTMLEditor::eJustify;
return NS_OK;
}
*aAlign = nsIHTMLEditor::eLeft;
return NS_OK;
}
// Check up the ladder for divs with alignment
bool isFirstNodeToExamine = true;
for (; nodeToExamine; nodeToExamine = nodeToExamine->GetParentNode()) {
if (!isFirstNodeToExamine &&
nodeToExamine->IsHTMLElement(nsGkAtoms::table)) {
// The node to examine is a table and this is not the first node we
// examine; let's break here to materialize the 'inline-block' behaviour
// of html tables regarding to text alignment
return NS_OK;
}
if (HTMLEditUtils::SupportsAlignAttr(*nodeToExamine)) {
// Check for alignment
nsAutoString typeAttrVal;
nodeToExamine->AsElement()->GetAttr(kNameSpaceID_None, nsGkAtoms::align,
typeAttrVal);
ToLowerCase(typeAttrVal);
if (!typeAttrVal.IsEmpty()) {
if (typeAttrVal.EqualsLiteral("center")) {
*aAlign = nsIHTMLEditor::eCenter;
} else if (typeAttrVal.EqualsLiteral("right")) {
*aAlign = nsIHTMLEditor::eRight;
} else if (typeAttrVal.EqualsLiteral("justify")) {
*aAlign = nsIHTMLEditor::eJustify;
} else {
*aAlign = nsIHTMLEditor::eLeft;
}
return NS_OK;
}
}
isFirstNodeToExamine = false;
}
return NS_OK;
}
static nsIAtom& MarginPropertyAtomForIndent(CSSEditUtils& aHTMLCSSUtils,
nsINode& aNode)
{
nsAutoString direction;
aHTMLCSSUtils.GetComputedProperty(aNode, *nsGkAtoms::direction, direction);
return direction.EqualsLiteral("rtl") ?
*nsGkAtoms::marginRight : *nsGkAtoms::marginLeft;
}
nsresult
HTMLEditRules::GetIndentState(bool* aCanIndent,
bool* aCanOutdent)
{
// XXX Looks like that this is implementation of
// nsIHTMLEditor::getIndentState() however nobody calls this method
// even with the interface method.
NS_ENSURE_TRUE(aCanIndent && aCanOutdent, NS_ERROR_FAILURE);
*aCanIndent = true;
*aCanOutdent = false;
// get selection
NS_ENSURE_STATE(mHTMLEditor && mHTMLEditor->GetSelection());
OwningNonNull<Selection> selection = *mHTMLEditor->GetSelection();
// contruct a list of nodes to act on.
nsTArray<OwningNonNull<nsINode>> arrayOfNodes;
nsresult rv = GetNodesFromSelection(*selection, EditAction::indent,
arrayOfNodes, TouchContent::no);
NS_ENSURE_SUCCESS(rv, rv);
// examine nodes in selection for blockquotes or list elements;
// these we can outdent. Note that we return true for canOutdent
// if *any* of the selection is outdentable, rather than all of it.
NS_ENSURE_STATE(mHTMLEditor);
bool useCSS = mHTMLEditor->IsCSSEnabled();
for (auto& curNode : Reversed(arrayOfNodes)) {
if (HTMLEditUtils::IsNodeThatCanOutdent(GetAsDOMNode(curNode))) {
*aCanOutdent = true;
break;
} else if (useCSS) {
// we are in CSS mode, indentation is done using the margin-left (or margin-right) property
NS_ENSURE_STATE(mHTMLEditor);
nsIAtom& marginProperty =
MarginPropertyAtomForIndent(*mHTMLEditor->mCSSEditUtils, curNode);
nsAutoString value;
// retrieve its specified value
NS_ENSURE_STATE(mHTMLEditor);
mHTMLEditor->mCSSEditUtils->GetSpecifiedProperty(*curNode,
marginProperty, value);
float f;
nsCOMPtr<nsIAtom> unit;
// get its number part and its unit
NS_ENSURE_STATE(mHTMLEditor);
mHTMLEditor->mCSSEditUtils->ParseLength(value, &f, getter_AddRefs(unit));
// if the number part is strictly positive, outdent is possible
if (0 < f) {
*aCanOutdent = true;
break;
}
}