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gecko-dev/editor/libeditor/HTMLTableEditor.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 <stdio.h>
#include "mozilla/HTMLEditor.h"
#include "HTMLEditUtils.h"
#include "mozilla/Assertions.h"
#include "mozilla/EditAction.h"
#include "mozilla/EditorDOMPoint.h"
#include "mozilla/EditorUtils.h"
#include "mozilla/FlushType.h"
#include "mozilla/PresShell.h"
#include "mozilla/dom/Selection.h"
#include "mozilla/dom/Element.h"
#include "nsAString.h"
#include "nsAlgorithm.h"
#include "nsCOMPtr.h"
#include "nsDebug.h"
#include "nsError.h"
#include "nsFrameSelection.h"
#include "nsGkAtoms.h"
#include "nsAtom.h"
#include "nsIContent.h"
#include "nsIFrame.h"
#include "nsINode.h"
#include "nsISupportsUtils.h"
#include "nsITableCellLayout.h" // For efficient access to table cell
#include "nsLiteralString.h"
#include "nsQueryFrame.h"
#include "nsRange.h"
#include "nsString.h"
#include "nsTArray.h"
#include "nsTableCellFrame.h"
#include "nsTableWrapperFrame.h"
#include "nscore.h"
#include <algorithm>
namespace mozilla {
using namespace dom;
/**
* Stack based helper class for restoring selection after table edit.
*/
class MOZ_STACK_CLASS AutoSelectionSetterAfterTableEdit final {
private:
RefPtr<HTMLEditor> mHTMLEditor;
RefPtr<Element> mTable;
int32_t mCol, mRow, mDirection, mSelected;
public:
AutoSelectionSetterAfterTableEdit(HTMLEditor& aHTMLEditor, Element* aTable,
int32_t aRow, int32_t aCol,
int32_t aDirection, bool aSelected)
: mHTMLEditor(&aHTMLEditor),
mTable(aTable),
mCol(aCol),
mRow(aRow),
mDirection(aDirection),
mSelected(aSelected) {}
MOZ_CAN_RUN_SCRIPT
~AutoSelectionSetterAfterTableEdit() {
if (mHTMLEditor) {
MOZ_KnownLive(mHTMLEditor)
->SetSelectionAfterTableEdit(MOZ_KnownLive(mTable), mRow, mCol,
mDirection, mSelected);
}
}
// This is needed to abort the caret reset in the destructor
// when one method yields control to another
void CancelSetCaret() {
mHTMLEditor = nullptr;
mTable = nullptr;
}
};
nsresult HTMLEditor::InsertCell(Element* aCell, int32_t aRowSpan,
int32_t aColSpan, bool aAfter, bool aIsHeader,
Element** aNewCell) {
if (aNewCell) {
*aNewCell = nullptr;
}
if (NS_WARN_IF(!aCell)) {
return NS_ERROR_NULL_POINTER;
}
// And the parent and offsets needed to do an insert
EditorDOMPoint pointToInsert(aCell);
if (NS_WARN_IF(!pointToInsert.IsSet())) {
return NS_ERROR_INVALID_ARG;
}
RefPtr<Element> newCell =
CreateElementWithDefaults(aIsHeader ? *nsGkAtoms::th : *nsGkAtoms::td);
if (NS_WARN_IF(!newCell)) {
return NS_ERROR_FAILURE;
}
// Optional: return new cell created
if (aNewCell) {
*aNewCell = do_AddRef(newCell).take();
}
if (aRowSpan > 1) {
// Note: Do NOT use editor transaction for this
nsAutoString newRowSpan;
newRowSpan.AppendInt(aRowSpan, 10);
newCell->SetAttr(kNameSpaceID_None, nsGkAtoms::rowspan, newRowSpan, true);
}
if (aColSpan > 1) {
// Note: Do NOT use editor transaction for this
nsAutoString newColSpan;
newColSpan.AppendInt(aColSpan, 10);
newCell->SetAttr(kNameSpaceID_None, nsGkAtoms::colspan, newColSpan, true);
}
if (aAfter) {
DebugOnly<bool> advanced = pointToInsert.AdvanceOffset();
NS_WARNING_ASSERTION(advanced,
"Failed to advance offset to after the old cell");
}
// Don't let Rules System change the selection.
AutoTransactionsConserveSelection dontChangeSelection(*this);
return InsertNodeWithTransaction(*newCell, pointToInsert);
}
nsresult HTMLEditor::SetColSpan(Element* aCell, int32_t aColSpan) {
if (NS_WARN_IF(!aCell)) {
return NS_ERROR_INVALID_ARG;
}
nsAutoString newSpan;
newSpan.AppendInt(aColSpan, 10);
return SetAttributeWithTransaction(*aCell, *nsGkAtoms::colspan, newSpan);
}
nsresult HTMLEditor::SetRowSpan(Element* aCell, int32_t aRowSpan) {
if (NS_WARN_IF(!aCell)) {
return NS_ERROR_INVALID_ARG;
}
nsAutoString newSpan;
newSpan.AppendInt(aRowSpan, 10);
return SetAttributeWithTransaction(*aCell, *nsGkAtoms::rowspan, newSpan);
}
NS_IMETHODIMP
HTMLEditor::InsertTableCell(int32_t aNumberOfCellsToInsert,
bool aInsertAfterSelectedCell) {
AutoEditActionDataSetter editActionData(*this,
EditAction::eInsertTableCellElement);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = InsertTableCellsWithTransaction(
aNumberOfCellsToInsert, aInsertAfterSelectedCell
? InsertPosition::eAfterSelectedCell
: InsertPosition::eBeforeSelectedCell);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult HTMLEditor::InsertTableCellsWithTransaction(
int32_t aNumberOfCellsToInsert, InsertPosition aInsertPosition) {
RefPtr<Element> table;
RefPtr<Element> curCell;
nsCOMPtr<nsINode> cellParent;
int32_t cellOffset, startRowIndex, startColIndex;
nsresult rv = GetCellContext(getter_AddRefs(table), getter_AddRefs(curCell),
getter_AddRefs(cellParent), &cellOffset,
&startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!table) || NS_WARN_IF(!curCell)) {
// Don't fail if no cell found.
return NS_OK;
}
// Get more data for current cell in row we are inserting at since we need
// colspan value.
IgnoredErrorResult ignoredError;
CellData cellDataAtSelection(*this, *table, startRowIndex, startColIndex,
ignoredError);
if (NS_WARN_IF(cellDataAtSelection.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
MOZ_ASSERT(curCell == cellDataAtSelection.mElement);
int32_t newCellIndex;
switch (aInsertPosition) {
case InsertPosition::eBeforeSelectedCell:
newCellIndex = cellDataAtSelection.mCurrent.mColumn;
break;
case InsertPosition::eAfterSelectedCell:
MOZ_ASSERT(!cellDataAtSelection.IsSpannedFromOtherRowOrColumn());
newCellIndex = cellDataAtSelection.NextColumnIndex();
break;
default:
MOZ_ASSERT_UNREACHABLE("Invalid InsertPosition");
}
AutoPlaceholderBatch treateAsOneTransaction(*this);
// Prevent auto insertion of BR in new cell until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eInsertNode, nsIEditor::eNext);
// We control selection resetting after the insert.
AutoSelectionSetterAfterTableEdit setCaret(
*this, table, cellDataAtSelection.mCurrent.mRow, newCellIndex,
ePreviousColumn, false);
// So, suppress Rules System selection munging.
AutoTransactionsConserveSelection dontChangeSelection(*this);
EditorDOMPoint pointToInsert(cellParent, cellOffset);
if (NS_WARN_IF(!pointToInsert.IsSet())) {
return NS_ERROR_FAILURE;
}
if (aInsertPosition == InsertPosition::eAfterSelectedCell) {
DebugOnly<bool> advanced = pointToInsert.AdvanceOffset();
NS_WARNING_ASSERTION(advanced,
"Faild to move insertion point after the cell");
}
for (int32_t i = 0; i < aNumberOfCellsToInsert; i++) {
RefPtr<Element> newCell = CreateElementWithDefaults(*nsGkAtoms::td);
if (NS_WARN_IF(!newCell)) {
return NS_ERROR_FAILURE;
}
AutoEditorDOMPointChildInvalidator lockOffset(pointToInsert);
rv = InsertNodeWithTransaction(*newCell, pointToInsert);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::GetFirstRow(Element* aTableOrElementInTable,
Element** aFirstRowElement) {
if (NS_WARN_IF(!aTableOrElementInTable) || NS_WARN_IF(!aFirstRowElement)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
ErrorResult error;
RefPtr<Element> firstRowElement =
GetFirstTableRowElement(*aTableOrElementInTable, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
firstRowElement.forget(aFirstRowElement);
return NS_OK;
}
Element* HTMLEditor::GetFirstTableRowElement(Element& aTableOrElementInTable,
ErrorResult& aRv) const {
MOZ_ASSERT(!aRv.Failed());
Element* tableElement = GetElementOrParentByTagNameInternal(
*nsGkAtoms::table, aTableOrElementInTable);
// If the element is not in <table>, return error.
if (NS_WARN_IF(!tableElement)) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
for (nsIContent* tableChild = tableElement->GetFirstChild(); tableChild;
tableChild = tableChild->GetNextSibling()) {
if (tableChild->IsHTMLElement(nsGkAtoms::tr)) {
// Found a row directly under <table>
return tableChild->AsElement();
}
// <table> can have table section elements like <tbody>. <tr> elements
// may be children of them.
if (tableChild->IsAnyOfHTMLElements(nsGkAtoms::tbody, nsGkAtoms::thead,
nsGkAtoms::tfoot)) {
for (nsIContent* tableSectionChild = tableChild->GetFirstChild();
tableSectionChild;
tableSectionChild = tableSectionChild->GetNextSibling()) {
if (tableSectionChild->IsHTMLElement(nsGkAtoms::tr)) {
return tableSectionChild->AsElement();
}
}
}
}
// Don't return error when there is no <tr> element in the <table>.
return nullptr;
}
Element* HTMLEditor::GetNextTableRowElement(Element& aTableRowElement,
ErrorResult& aRv) const {
MOZ_ASSERT(!aRv.Failed());
if (NS_WARN_IF(!aTableRowElement.IsHTMLElement(nsGkAtoms::tr))) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
for (nsIContent* maybeNextRow = aTableRowElement.GetNextSibling();
maybeNextRow; maybeNextRow = maybeNextRow->GetNextSibling()) {
if (maybeNextRow->IsHTMLElement(nsGkAtoms::tr)) {
return maybeNextRow->AsElement();
}
}
// In current table section (e.g., <tbody>), there is no <tr> element.
// Then, check the following table sections.
Element* parentElementOfRow = aTableRowElement.GetParentElement();
if (NS_WARN_IF(!parentElementOfRow)) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
// Basically, <tr> elements should be in table section elements even if
// they are not written in the source explicitly. However, for preventing
// cross table boundary, check it now.
if (parentElementOfRow->IsHTMLElement(nsGkAtoms::table)) {
// Don't return error since this means just not found.
return nullptr;
}
for (nsIContent* maybeNextTableSection = parentElementOfRow->GetNextSibling();
maybeNextTableSection;
maybeNextTableSection = maybeNextTableSection->GetNextSibling()) {
// If the sibling of parent of given <tr> is a table section element,
// check its children.
if (maybeNextTableSection->IsAnyOfHTMLElements(
nsGkAtoms::tbody, nsGkAtoms::thead, nsGkAtoms::tfoot)) {
for (nsIContent* maybeNextRow = maybeNextTableSection->GetFirstChild();
maybeNextRow; maybeNextRow = maybeNextRow->GetNextSibling()) {
if (maybeNextRow->IsHTMLElement(nsGkAtoms::tr)) {
return maybeNextRow->AsElement();
}
}
}
// I'm not sure whether this is a possible case since table section
// elements are created automatically. However, DOM API may create
// <tr> elements without table section elements. So, let's check it.
else if (maybeNextTableSection->IsHTMLElement(nsGkAtoms::tr)) {
return maybeNextTableSection->AsElement();
}
}
// Don't return error when the given <tr> element is the last <tr> element in
// the <table>.
return nullptr;
}
nsresult HTMLEditor::GetLastCellInRow(nsINode* aRowNode, nsINode** aCellNode) {
NS_ENSURE_TRUE(aCellNode, NS_ERROR_NULL_POINTER);
*aCellNode = nullptr;
NS_ENSURE_TRUE(aRowNode, NS_ERROR_NULL_POINTER);
nsCOMPtr<nsINode> rowChild = aRowNode->GetLastChild();
while (rowChild && !HTMLEditUtils::IsTableCell(rowChild)) {
// Skip over textnodes
rowChild = rowChild->GetPreviousSibling();
}
if (rowChild) {
rowChild.forget(aCellNode);
return NS_OK;
}
// If here, cell was not found
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
NS_IMETHODIMP
HTMLEditor::InsertTableColumn(int32_t aNumberOfColumnsToInsert,
bool aInsertAfterSelectedCell) {
AutoEditActionDataSetter editActionData(*this,
EditAction::eInsertTableColumn);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = InsertTableColumnsWithTransaction(
aNumberOfColumnsToInsert, aInsertAfterSelectedCell
? InsertPosition::eAfterSelectedCell
: InsertPosition::eBeforeSelectedCell);
if (NS_WARN_IF(NS_FAILED(rv))) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult HTMLEditor::InsertTableColumnsWithTransaction(
int32_t aNumberOfColumnsToInsert, InsertPosition aInsertPosition) {
MOZ_ASSERT(IsEditActionDataAvailable());
RefPtr<Element> table;
RefPtr<Element> curCell;
int32_t startRowIndex, startColIndex;
nsresult rv =
GetCellContext(getter_AddRefs(table), getter_AddRefs(curCell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!table) || NS_WARN_IF(!curCell)) {
// Don't fail if no cell found.
return NS_OK;
}
// Get more data for current cell, we need rowspan value.
IgnoredErrorResult ignoredError;
CellData cellDataAtSelection(*this, *table, startRowIndex, startColIndex,
ignoredError);
if (NS_WARN_IF(cellDataAtSelection.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
MOZ_ASSERT(curCell == cellDataAtSelection.mElement);
ErrorResult error;
TableSize tableSize(*this, *table, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
// Should not be empty since we've already found a cell.
MOZ_ASSERT(!tableSize.IsEmpty());
AutoPlaceholderBatch treateAsOneTransaction(*this);
// Prevent auto insertion of <br> element in new cell until we're done.
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eInsertNode, nsIEditor::eNext);
switch (aInsertPosition) {
case InsertPosition::eBeforeSelectedCell:
break;
case InsertPosition::eAfterSelectedCell:
// Use column after current cell.
startColIndex += cellDataAtSelection.mEffectiveColSpan;
// Detect when user is adding after a colspan=0 case.
// Assume they want to stop the "0" behavior and really add a new column.
// Thus we set the colspan to its true value.
if (!cellDataAtSelection.mColSpan) {
SetColSpan(MOZ_KnownLive(cellDataAtSelection.mElement),
cellDataAtSelection.mEffectiveColSpan);
}
break;
default:
MOZ_ASSERT_UNREACHABLE("Invalid InsertPosition");
}
// We control selection resetting after the insert.
AutoSelectionSetterAfterTableEdit setCaret(
*this, table, cellDataAtSelection.mCurrent.mRow, startColIndex,
ePreviousRow, false);
// Suppress Rules System selection munging.
AutoTransactionsConserveSelection dontChangeSelection(*this);
// If we are inserting after all existing columns, make sure table is
// "well formed" before appending new column.
// XXX As far as I've tested, NormalizeTableInternal() always fails to
// normalize non-rectangular table. So, the following CellData will
// fail if the table is not rectangle.
if (startColIndex >= tableSize.mColumnCount) {
DebugOnly<nsresult> rv = NormalizeTableInternal(*table);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to normalize the table");
}
RefPtr<Element> rowElement;
for (int32_t rowIndex = 0; rowIndex < tableSize.mRowCount; rowIndex++) {
if (startColIndex < tableSize.mColumnCount) {
// We are inserting before an existing column.
CellData cellData(*this, *table, rowIndex, startColIndex, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// Don't fail entire process if we fail to find a cell (may fail just in
// particular rows with < adequate cells per row).
// XXX So, here wants to know whether the CellData actually failed above.
// Fix this later.
if (!cellData.mElement) {
continue;
}
if (cellData.IsSpannedFromOtherColumn()) {
// If we have a cell spanning this location, simply increase its
// colspan to keep table rectangular.
// Note: we do nothing if colsspan=0, since it should automatically
// span the new column.
if (cellData.mColSpan > 0) {
SetColSpan(MOZ_KnownLive(cellData.mElement),
cellData.mColSpan + aNumberOfColumnsToInsert);
}
continue;
}
// Simply set selection to the current cell. So, we can let
// InsertTableCellsWithTransaction() do the work. Insert a new cell
// before current one.
SelectionRefPtr()->Collapse(RawRangeBoundary(cellData.mElement, 0),
ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"Failed to collapse Selection into the cell");
rv = InsertTableCellsWithTransaction(aNumberOfColumnsToInsert,
InsertPosition::eBeforeSelectedCell);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to insert a cell element");
continue;
}
// Get current row and append new cells after last cell in row
if (!rowIndex) {
rowElement = GetFirstTableRowElement(*table, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (NS_WARN_IF(!rowElement)) {
continue;
}
} else {
if (NS_WARN_IF(!rowElement)) {
// XXX Looks like that when rowIndex is 0, startColIndex is always
// same as or larger than tableSize.mColumnCount. Is it true?
return NS_ERROR_FAILURE;
}
rowElement = GetNextTableRowElement(*rowElement, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (NS_WARN_IF(!rowElement)) {
continue;
}
}
nsCOMPtr<nsINode> lastCellNode;
rv = GetLastCellInRow(rowElement, getter_AddRefs(lastCellNode));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!lastCellNode)) {
return NS_ERROR_FAILURE;
}
// Simply add same number of cells to each row. Although tempted to check
// cell indexes for current cell, the effects of colspan > 1 in some cells
// makes this futile. We must use NormalizeTableInternal() first to assure
// that there are cells in each cellmap location.
SelectionRefPtr()->Collapse(RawRangeBoundary(lastCellNode, 0),
ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"Failed to collapse Selection into the cell");
rv = InsertTableCellsWithTransaction(aNumberOfColumnsToInsert,
InsertPosition::eAfterSelectedCell);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to insert a cell element");
}
// XXX This is perhaps the result of the last call of
// InsertTableCellsWithTransaction().
return rv;
}
NS_IMETHODIMP
HTMLEditor::InsertTableRow(int32_t aNumberOfRowsToInsert,
bool aInsertAfterSelectedCell) {
AutoEditActionDataSetter editActionData(*this,
EditAction::eInsertTableRowElement);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = InsertTableRowsWithTransaction(
aNumberOfRowsToInsert, aInsertAfterSelectedCell
? InsertPosition::eAfterSelectedCell
: InsertPosition::eBeforeSelectedCell);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult HTMLEditor::InsertTableRowsWithTransaction(
int32_t aNumberOfRowsToInsert, InsertPosition aInsertPosition) {
RefPtr<Element> table;
RefPtr<Element> curCell;
int32_t startRowIndex, startColIndex;
nsresult rv =
GetCellContext(getter_AddRefs(table), getter_AddRefs(curCell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!table) || NS_WARN_IF(!curCell)) {
// Don't fail if no cell found.
return NS_OK;
}
// Get more data for current cell in row we are inserting at because we need
// colspan.
IgnoredErrorResult ignoredError;
CellData cellDataAtSelection(*this, *table, startRowIndex, startColIndex,
ignoredError);
if (NS_WARN_IF(cellDataAtSelection.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
MOZ_ASSERT(curCell == cellDataAtSelection.mElement);
ErrorResult error;
TableSize tableSize(*this, *table, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
// Should not be empty since we've already found a cell.
MOZ_ASSERT(!tableSize.IsEmpty());
AutoPlaceholderBatch treateAsOneTransaction(*this);
// Prevent auto insertion of BR in new cell until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eInsertNode, nsIEditor::eNext);
switch (aInsertPosition) {
case InsertPosition::eBeforeSelectedCell:
break;
case InsertPosition::eAfterSelectedCell:
// Use row after current cell.
startRowIndex += cellDataAtSelection.mEffectiveRowSpan;
// Detect when user is adding after a rowspan=0 case.
// Assume they want to stop the "0" behavior and really add a new row.
// Thus we set the rowspan to its true value.
if (!cellDataAtSelection.mRowSpan) {
SetRowSpan(MOZ_KnownLive(cellDataAtSelection.mElement),
cellDataAtSelection.mEffectiveRowSpan);
}
break;
default:
MOZ_ASSERT_UNREACHABLE("Invalid InsertPosition");
}
// We control selection resetting after the insert.
AutoSelectionSetterAfterTableEdit setCaret(
*this, table, startRowIndex, cellDataAtSelection.mCurrent.mColumn,
ePreviousColumn, false);
// Suppress Rules System selection munging.
AutoTransactionsConserveSelection dontChangeSelection(*this);
RefPtr<Element> cellForRowParent;
int32_t cellsInRow = 0;
if (startRowIndex < tableSize.mRowCount) {
// We are inserting above an existing row. Get each cell in the insert
// row to adjust for colspan effects while we count how many cells are
// needed.
CellData cellData;
for (int32_t colIndex = 0;; colIndex = cellData.NextColumnIndex()) {
cellData.Update(*this, *table, startRowIndex, colIndex, ignoredError);
if (cellData.FailedOrNotFound()) {
break; // Perhaps, we reach end of the row.
}
// XXX So, this is impossible case. Will be removed.
if (NS_WARN_IF(!cellData.mElement)) {
break;
}
if (cellData.IsSpannedFromOtherRow()) {
// We have a cell spanning this location. Increase its rowspan.
// Note that if rowspan is 0, we do nothing since that cell should
// automatically extend into the new row.
if (cellData.mRowSpan > 0) {
SetRowSpan(MOZ_KnownLive(cellData.mElement),
cellData.mRowSpan + aNumberOfRowsToInsert);
}
continue;
}
cellsInRow += cellData.mEffectiveColSpan;
if (!cellForRowParent) {
// FYI: Don't use std::move() here since NextColumnIndex() needs it.
cellForRowParent = cellData.mElement;
}
MOZ_ASSERT(colIndex < cellData.NextColumnIndex());
}
} else {
// We are adding a new row after all others. If it weren't for colspan=0
// effect, we could simply use tableSize.mColumnCount for number of new
// cells...
// XXX colspan=0 support has now been removed in table layout so maybe this
// can be cleaned up now? (bug 1243183)
cellsInRow = tableSize.mColumnCount;
// but we must compensate for all cells with rowspan = 0 in the last row.
const int32_t kLastRowIndex = tableSize.mRowCount - 1;
CellData cellData;
for (int32_t colIndex = 0;; colIndex = cellData.NextColumnIndex()) {
cellData.Update(*this, *table, kLastRowIndex, colIndex, ignoredError);
if (cellData.FailedOrNotFound()) {
break; // Perhaps, we reach end of the row.
}
if (!cellData.mRowSpan) {
MOZ_ASSERT(cellsInRow >= cellData.mEffectiveColSpan);
cellsInRow -= cellData.mEffectiveColSpan;
}
// Save cell from the last row that we will use below
if (!cellForRowParent && !cellData.IsSpannedFromOtherRow()) {
// FYI: Don't use std::move() here since NextColumnIndex() needs it.
cellForRowParent = cellData.mElement;
}
MOZ_ASSERT(colIndex < cellData.NextColumnIndex());
}
}
if (NS_WARN_IF(!cellsInRow)) {
// There is no cell element in the last row??
return NS_OK;
}
if (NS_WARN_IF(!cellForRowParent)) {
return NS_ERROR_FAILURE;
}
Element* parentRow =
GetElementOrParentByTagNameInternal(*nsGkAtoms::tr, *cellForRowParent);
if (NS_WARN_IF(!parentRow)) {
return NS_ERROR_FAILURE;
}
// The row parent and offset where we will insert new row.
EditorDOMPoint pointToInsert(parentRow);
if (NS_WARN_IF(!pointToInsert.IsSet())) {
return NS_ERROR_FAILURE;
}
// Adjust for when adding past the end.
if (aInsertPosition == InsertPosition::eAfterSelectedCell &&
startRowIndex >= tableSize.mRowCount) {
DebugOnly<bool> advanced = pointToInsert.AdvanceOffset();
NS_WARNING_ASSERTION(advanced, "Failed to advance offset");
}
for (int32_t row = 0; row < aNumberOfRowsToInsert; row++) {
// Create a new row
RefPtr<Element> newRow = CreateElementWithDefaults(*nsGkAtoms::tr);
if (NS_WARN_IF(!newRow)) {
return NS_ERROR_FAILURE;
}
for (int32_t i = 0; i < cellsInRow; i++) {
RefPtr<Element> newCell = CreateElementWithDefaults(*nsGkAtoms::td);
if (NS_WARN_IF(!newCell)) {
return NS_ERROR_FAILURE;
}
newRow->AppendChild(*newCell, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
}
AutoEditorDOMPointChildInvalidator lockOffset(pointToInsert);
rv = InsertNodeWithTransaction(*newRow, pointToInsert);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
// SetSelectionAfterTableEdit from AutoSelectionSetterAfterTableEdit will
// access frame selection, so we need reframe.
// Because GetTableCellElementAt() depends on frame.
if (RefPtr<PresShell> presShell = GetPresShell()) {
presShell->FlushPendingNotifications(FlushType::Frames);
}
return NS_OK;
}
nsresult HTMLEditor::DeleteTableElementAndChildrenWithTransaction(
Element& aTableElement) {
MOZ_ASSERT(IsEditActionDataAvailable());
// Block selectionchange event. It's enough to dispatch selectionchange
// event immediately after removing the table element.
{
AutoHideSelectionChanges hideSelection(SelectionRefPtr());
// Select the <table> element after clear current selection.
if (SelectionRefPtr()->RangeCount()) {
nsresult rv = SelectionRefPtr()->RemoveAllRangesTemporarily();
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
RefPtr<nsRange> range = new nsRange(&aTableElement);
ErrorResult error;
range->SelectNode(aTableElement, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
SelectionRefPtr()->AddRangeAndSelectFramesAndNotifyListeners(*range, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
#ifdef DEBUG
range = SelectionRefPtr()->GetRangeAt(0);
MOZ_ASSERT(range);
MOZ_ASSERT(range->GetStartContainer() == aTableElement.GetParent());
MOZ_ASSERT(range->GetEndContainer() == aTableElement.GetParent());
MOZ_ASSERT(range->GetChildAtStartOffset() == &aTableElement);
MOZ_ASSERT(range->GetChildAtEndOffset() == aTableElement.GetNextSibling());
#endif // #ifdef DEBUG
}
nsresult rv = DeleteSelectionAsSubAction(eNext, eStrip);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::DeleteTable() {
AutoEditActionDataSetter editActionData(*this,
EditAction::eRemoveTableElement);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<Element> table;
nsresult rv = GetCellContext(getter_AddRefs(table), nullptr, nullptr, nullptr,
nullptr, nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
if (NS_WARN_IF(!table)) {
return NS_ERROR_FAILURE;
}
AutoPlaceholderBatch treateAsOneTransaction(*this);
rv = DeleteTableElementAndChildrenWithTransaction(*table);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::DeleteTableCell(int32_t aNumberOfCellsToDelete) {
AutoEditActionDataSetter editActionData(*this,
EditAction::eRemoveTableCellElement);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = DeleteTableCellWithTransaction(aNumberOfCellsToDelete);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult HTMLEditor::DeleteTableCellWithTransaction(
int32_t aNumberOfCellsToDelete) {
MOZ_ASSERT(IsEditActionDataAvailable());
RefPtr<Element> table;
RefPtr<Element> cell;
int32_t startRowIndex, startColIndex;
nsresult rv =
GetCellContext(getter_AddRefs(table), getter_AddRefs(cell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!table) || NS_WARN_IF(!cell)) {
// Don't fail if we didn't find a table or cell.
return NS_OK;
}
AutoPlaceholderBatch treateAsOneTransaction(*this);
// Prevent rules testing until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eDeleteNode, nsIEditor::eNext);
ErrorResult error;
RefPtr<Element> firstSelectedCellElement =
GetFirstSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
MOZ_ASSERT(SelectionRefPtr()->RangeCount());
TableSize tableSize(*this, *table, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
MOZ_ASSERT(!tableSize.IsEmpty());
// If only one cell is selected or no cell is selected, remove cells
// starting from the first selected cell or a cell containing first
// selection range.
if (!firstSelectedCellElement || SelectionRefPtr()->RangeCount() == 1) {
for (int32_t i = 0; i < aNumberOfCellsToDelete; i++) {
rv = GetCellContext(getter_AddRefs(table), getter_AddRefs(cell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!table) || NS_WARN_IF(!cell)) {
// Don't fail if no cell found
return NS_OK;
}
int32_t numberOfCellsInRow = GetNumberOfCellsInRow(*table, startRowIndex);
NS_WARNING_ASSERTION(numberOfCellsInRow >= 0,
"Failed to count number of cells in the row");
if (numberOfCellsInRow == 1) {
// Remove <tr> or <table> if we're removing all cells in the row or
// the table.
if (tableSize.mRowCount == 1) {
rv = DeleteTableElementAndChildrenWithTransaction(*table);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
// We need to call DeleteSelectedTableRowsWithTransaction() to handle
// cells with rowspan attribute.
rv = DeleteSelectedTableRowsWithTransaction(1);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Adjust table rows simply. In strictly speaking, we should
// recompute table size with the latest layout information since
// mutation event listener may have changed the DOM tree. However,
// this is not in usual path of Firefox. So, we can assume that
// there are no mutation event listeners.
MOZ_ASSERT(tableSize.mRowCount);
tableSize.mRowCount--;
continue;
}
// The setCaret object will call AutoSelectionSetterAfterTableEdit in its
// destructor
AutoSelectionSetterAfterTableEdit setCaret(
*this, table, startRowIndex, startColIndex, ePreviousColumn, false);
AutoTransactionsConserveSelection dontChangeSelection(*this);
// XXX Removing cell element causes not adjusting colspan.
rv = DeleteNodeWithTransaction(*cell);
// If we fail, don't try to delete any more cells???
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Note that we don't refer column number in this loop. So, it must
// be safe not to recompute table size since number of row is synced
// above.
}
return NS_OK;
}
// When 2 or more cells are selected, ignore aNumberOfCellsToRemove and
// remove all selected cells.
CellIndexes firstCellIndexes(*firstSelectedCellElement, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
cell = firstSelectedCellElement;
startRowIndex = firstCellIndexes.mRow;
startColIndex = firstCellIndexes.mColumn;
// The setCaret object will call AutoSelectionSetterAfterTableEdit in its
// destructor
AutoSelectionSetterAfterTableEdit setCaret(
*this, table, startRowIndex, startColIndex, ePreviousColumn, false);
AutoTransactionsConserveSelection dontChangeSelection(*this);
bool checkToDeleteRow = true;
bool checkToDeleteColumn = true;
while (cell) {
if (checkToDeleteRow) {
// Optimize to delete an entire row
// Clear so we don't repeat AllCellsInRowSelected within the same row
checkToDeleteRow = false;
if (AllCellsInRowSelected(table, startRowIndex, tableSize.mColumnCount)) {
// First, find the next cell in a different row to continue after we
// delete this row.
int32_t nextRow = startRowIndex;
while (nextRow == startRowIndex) {
cell = GetNextSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (!cell) {
break;
}
CellIndexes nextSelectedCellIndexes(*cell, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
nextRow = nextSelectedCellIndexes.mRow;
startColIndex = nextSelectedCellIndexes.mColumn;
}
if (tableSize.mRowCount == 1) {
rv = DeleteTableElementAndChildrenWithTransaction(*table);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
rv = DeleteTableRowWithTransaction(*table, startRowIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Adjust table rows simply. In strictly speaking, we should
// recompute table size with the latest layout information since
// mutation event listener may have changed the DOM tree. However,
// this is not in usual path of Firefox. So, we can assume that
// there are no mutation event listeners.
MOZ_ASSERT(tableSize.mRowCount);
tableSize.mRowCount--;
if (!cell) {
break;
}
// For the next cell: Subtract 1 for row we deleted
startRowIndex = nextRow - 1;
// Set true since we know we will look at a new row next
checkToDeleteRow = true;
continue;
}
}
if (checkToDeleteColumn) {
// Optimize to delete an entire column
// Clear this so we don't repeat AllCellsInColSelected within the same Col
checkToDeleteColumn = false;
if (AllCellsInColumnSelected(table, startColIndex,
tableSize.mColumnCount)) {
// First, find the next cell in a different column to continue after
// we delete this column.
int32_t nextCol = startColIndex;
while (nextCol == startColIndex) {
cell = GetNextSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (!cell) {
break;
}
CellIndexes nextSelectedCellIndexes(*cell, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
startRowIndex = nextSelectedCellIndexes.mRow;
nextCol = nextSelectedCellIndexes.mColumn;
}
// Delete all cells which belong to the column.
rv = DeleteTableColumnWithTransaction(*table, startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Adjust table columns simply. In strictly speaking, we should
// recompute table size with the latest layout information since
// mutation event listener may have changed the DOM tree. However,
// this is not in usual path of Firefox. So, we can assume that
// there are no mutation event listeners.
MOZ_ASSERT(tableSize.mColumnCount);
tableSize.mColumnCount--;
if (!cell) {
break;
}
// For the next cell, subtract 1 for col. deleted
startColIndex = nextCol - 1;
// Set true since we know we will look at a new column next
checkToDeleteColumn = true;
continue;
}
}
// First get the next cell to delete
RefPtr<Element> nextCell = GetNextSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
// Then delete the cell
rv = DeleteNodeWithTransaction(*cell);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (!nextCell) {
return NS_OK;
}
CellIndexes nextCellIndexes(*nextCell, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
startRowIndex = nextCellIndexes.mRow;
startColIndex = nextCellIndexes.mColumn;
cell = std::move(nextCell);
// When table cell is removed, table size of column may be changed.
// For example, if there are 2 rows, one has 2 cells, the other has
// 3 cells, tableSize.mColumnCount is 3. When this removes a cell
// in the latter row, mColumnCount should be come 2. However, we
// don't use mColumnCount in this loop, so, this must be okay for now.
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::DeleteTableCellContents() {
AutoEditActionDataSetter editActionData(*this,
EditAction::eDeleteTableCellContents);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = DeleteTableCellContentsWithTransaction();
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult HTMLEditor::DeleteTableCellContentsWithTransaction() {
MOZ_ASSERT(IsEditActionDataAvailable());
RefPtr<Element> table;
RefPtr<Element> cell;
int32_t startRowIndex, startColIndex;
nsresult rv =
GetCellContext(getter_AddRefs(table), getter_AddRefs(cell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!cell)) {
// Don't fail if no cell found.
return NS_OK;
}
AutoPlaceholderBatch treateAsOneTransaction(*this);
// Prevent rules testing until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eDeleteNode, nsIEditor::eNext);
// Don't let Rules System change the selection
AutoTransactionsConserveSelection dontChangeSelection(*this);
ErrorResult error;
RefPtr<Element> firstSelectedCellElement =
GetFirstSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (firstSelectedCellElement) {
CellIndexes firstCellIndexes(*firstSelectedCellElement, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
cell = firstSelectedCellElement;
startRowIndex = firstCellIndexes.mRow;
startColIndex = firstCellIndexes.mColumn;
}
AutoSelectionSetterAfterTableEdit setCaret(
*this, table, startRowIndex, startColIndex, ePreviousColumn, false);
while (cell) {
DebugOnly<nsresult> rv = DeleteAllChildrenWithTransaction(*cell);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"Failed to remove all children of the cell element");
// If selection is not in cell-select mode, we should remove only the cell
// which contains first selection range.
if (!firstSelectedCellElement) {
return NS_OK;
}
// If there are 2 or more selected cells, keep handling the other selected
// cells.
cell = GetNextSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::DeleteTableColumn(int32_t aNumberOfColumnsToDelete) {
AutoEditActionDataSetter editActionData(*this,
EditAction::eRemoveTableColumn);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv =
DeleteSelectedTableColumnsWithTransaction(aNumberOfColumnsToDelete);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult HTMLEditor::DeleteSelectedTableColumnsWithTransaction(
int32_t aNumberOfColumnsToDelete) {
RefPtr<Element> table;
RefPtr<Element> cell;
int32_t startRowIndex, startColIndex;
nsresult rv =
GetCellContext(getter_AddRefs(table), getter_AddRefs(cell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!table) || NS_WARN_IF(!cell)) {
// Don't fail if no cell found.
return NS_OK;
}
ErrorResult error;
TableSize tableSize(*this, *table, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
AutoPlaceholderBatch treateAsOneTransaction(*this);
// Prevent rules testing until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eDeleteNode, nsIEditor::eNext);
// Shortcut the case of deleting all columns in table
if (!startColIndex && aNumberOfColumnsToDelete >= tableSize.mColumnCount) {
rv = DeleteTableElementAndChildrenWithTransaction(*table);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
// Test if deletion is controlled by selected cells
RefPtr<Element> firstSelectedCellElement =
GetFirstSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
MOZ_ASSERT(SelectionRefPtr()->RangeCount());
if (firstSelectedCellElement && SelectionRefPtr()->RangeCount() > 1) {
CellIndexes firstCellIndexes(*firstSelectedCellElement, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
startRowIndex = firstCellIndexes.mRow;
startColIndex = firstCellIndexes.mColumn;
}
// We control selection resetting after the insert...
AutoSelectionSetterAfterTableEdit setCaret(
*this, table, startRowIndex, startColIndex, ePreviousRow, false);
// If 2 or more cells are not selected, removing columns starting from
// a column which contains first selection range.
if (!firstSelectedCellElement || SelectionRefPtr()->RangeCount() == 1) {
int32_t columnCountToRemove = std::min(
aNumberOfColumnsToDelete, tableSize.mColumnCount - startColIndex);
for (int32_t i = 0; i < columnCountToRemove; i++) {
rv = DeleteTableColumnWithTransaction(*table, startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
return NS_OK;
}
// If 2 or more cells are selected, remove all columns which contain selected
// cells. I.e., we ignore aNumberOfColumnsToDelete in this case.
for (cell = firstSelectedCellElement; cell;) {
if (cell != firstSelectedCellElement) {
CellIndexes cellIndexes(*cell, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
startRowIndex = cellIndexes.mRow;
startColIndex = cellIndexes.mColumn;
}
// Find the next cell in a different column
// to continue after we delete this column
int32_t nextCol = startColIndex;
while (nextCol == startColIndex) {
cell = GetNextSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (!cell) {
break;
}
CellIndexes cellIndexes(*cell, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
startRowIndex = cellIndexes.mRow;
nextCol = cellIndexes.mColumn;
}
rv = DeleteTableColumnWithTransaction(*table, startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
return NS_OK;
}
nsresult HTMLEditor::DeleteTableColumnWithTransaction(Element& aTableElement,
int32_t aColumnIndex) {
MOZ_ASSERT(IsEditActionDataAvailable());
// XXX Why don't this method remove proper <col> (and <colgroup>)?
ErrorResult error;
IgnoredErrorResult ignoredError;
for (int32_t rowIndex = 0;; rowIndex++) {
CellData cellData(*this, aTableElement, rowIndex, aColumnIndex,
ignoredError);
// Failure means that there is no more row in the table. In this case,
// we shouldn't return error since we just reach the end of the table.
// XXX Should distinguish whether CellData returns error or just not found
// later.
if (cellData.FailedOrNotFound()) {
return NS_OK;
}
// Find cells that don't start in column we are deleting.
MOZ_ASSERT(cellData.mColSpan >= 0);
if (cellData.IsSpannedFromOtherColumn() || cellData.mColSpan != 1) {
// If we have a cell spanning this location, decrease its colspan to
// keep table rectangular, but if colspan is 0, it'll be adjusted
// automatically.
if (cellData.mColSpan > 0) {
NS_WARNING_ASSERTION(cellData.mColSpan > 1,
"colspan should be 2 or larger");
SetColSpan(MOZ_KnownLive(cellData.mElement), cellData.mColSpan - 1);
}
if (!cellData.IsSpannedFromOtherColumn()) {
// Cell is in column to be deleted, but must have colspan > 1,
// so delete contents of cell instead of cell itself (We must have
// reset colspan above).
DebugOnly<nsresult> rv =
DeleteAllChildrenWithTransaction(MOZ_KnownLive(*cellData.mElement));
NS_WARNING_ASSERTION(
NS_SUCCEEDED(rv),
"Failed to remove all children of the cell element");
}
// Skip rows which the removed cell spanned.
rowIndex += cellData.NumberOfFollowingRows();
continue;
}
// Delete the cell
int32_t numberOfCellsInRow =
GetNumberOfCellsInRow(aTableElement, cellData.mCurrent.mRow);
NS_WARNING_ASSERTION(numberOfCellsInRow > 0,
"Failed to count existing cells in the row");
if (numberOfCellsInRow != 1) {
// If removing cell is not the last cell of the row, we can just remove
// it.
nsresult rv =
DeleteNodeWithTransaction(MOZ_KnownLive(*cellData.mElement));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Skip rows which the removed cell spanned.
rowIndex += cellData.NumberOfFollowingRows();
continue;
}
// When the cell is the last cell in the row, remove the row instead.
Element* parentRow =
GetElementOrParentByTagNameInternal(*nsGkAtoms::tr, *cellData.mElement);
if (NS_WARN_IF(!parentRow)) {
return NS_ERROR_FAILURE;
}
// Check if its the only row left in the table. If so, we can delete
// the table instead.
TableSize tableSize(*this, aTableElement, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (tableSize.mRowCount == 1) {
// We're deleting the last row. So, let's remove the <table> now.
nsresult rv = DeleteTableElementAndChildrenWithTransaction(aTableElement);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
// Delete the row by placing caret in cell we were to delete. We need
// to call DeleteTableRowWithTransaction() to handle cells with rowspan.
nsresult rv =
DeleteTableRowWithTransaction(aTableElement, cellData.mFirst.mRow);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Note that we decrement rowIndex since a row was deleted.
rowIndex--;
}
}
NS_IMETHODIMP
HTMLEditor::DeleteTableRow(int32_t aNumberOfRowsToDelete) {
AutoEditActionDataSetter editActionData(*this,
EditAction::eRemoveTableRowElement);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
nsresult rv = DeleteSelectedTableRowsWithTransaction(aNumberOfRowsToDelete);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult HTMLEditor::DeleteSelectedTableRowsWithTransaction(
int32_t aNumberOfRowsToDelete) {
MOZ_ASSERT(IsEditActionDataAvailable());
RefPtr<Element> table;
RefPtr<Element> cell;
int32_t startRowIndex, startColIndex;
nsresult rv =
GetCellContext(getter_AddRefs(table), getter_AddRefs(cell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (NS_WARN_IF(!table) || NS_WARN_IF(!cell)) {
// Don't fail if no cell found.
return NS_OK;
}
ErrorResult error;
TableSize tableSize(*this, *table, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
AutoPlaceholderBatch treateAsOneTransaction(*this);
// Prevent rules testing until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eDeleteNode, nsIEditor::eNext);
// Shortcut the case of deleting all rows in table
if (!startRowIndex && aNumberOfRowsToDelete >= tableSize.mRowCount) {
rv = DeleteTableElementAndChildrenWithTransaction(*table);
if (NS_WARN_IF(NS_FAILED(rv))) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
RefPtr<Element> firstSelectedCellElement =
GetFirstSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
MOZ_ASSERT(SelectionRefPtr()->RangeCount());
if (firstSelectedCellElement && SelectionRefPtr()->RangeCount() > 1) {
// Fetch indexes again - may be different for selected cells
CellIndexes firstCellIndexes(*firstSelectedCellElement, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
startRowIndex = firstCellIndexes.mRow;
startColIndex = firstCellIndexes.mColumn;
}
// We control selection resetting after the insert...
AutoSelectionSetterAfterTableEdit setCaret(
*this, table, startRowIndex, startColIndex, ePreviousRow, false);
// Don't change selection during deletions
AutoTransactionsConserveSelection dontChangeSelection(*this);
// XXX Perhaps, the following loops should collect <tr> elements to remove
// first, then, remove them from the DOM tree since mutation event
// listener may change the DOM tree during the loops.
// If 2 or more cells are not selected, removing rows starting from
// a row which contains first selection range.
if (!firstSelectedCellElement || SelectionRefPtr()->RangeCount() == 1) {
int32_t rowCountToRemove =
std::min(aNumberOfRowsToDelete, tableSize.mRowCount - startRowIndex);
for (int32_t i = 0; i < rowCountToRemove; i++) {
nsresult rv = DeleteTableRowWithTransaction(*table, startRowIndex);
// If failed in current row, try the next
if (NS_WARN_IF(NS_FAILED(rv))) {
startRowIndex++;
}
// Check if there's a cell in the "next" row.
cell = GetTableCellElementAt(*table, startRowIndex, startColIndex);
if (!cell) {
return NS_OK;
}
}
return NS_OK;
}
// If 2 or more cells are selected, remove all rows which contain selected
// cells. I.e., we ignore aNumberOfRowsToDelete in this case.
for (cell = firstSelectedCellElement; cell;) {
if (cell != firstSelectedCellElement) {
CellIndexes cellIndexes(*cell, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
startRowIndex = cellIndexes.mRow;
startColIndex = cellIndexes.mColumn;
}
// Find the next cell in a different row
// to continue after we delete this row
int32_t nextRow = startRowIndex;
while (nextRow == startRowIndex) {
cell = GetNextSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (!cell) {
break;
}
CellIndexes cellIndexes(*cell, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
nextRow = cellIndexes.mRow;
startColIndex = cellIndexes.mColumn;
}
// Delete the row containing selected cell(s).
rv = DeleteTableRowWithTransaction(*table, startRowIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
return NS_OK;
}
// Helper that doesn't batch or change the selection
nsresult HTMLEditor::DeleteTableRowWithTransaction(Element& aTableElement,
int32_t aRowIndex) {
ErrorResult error;
TableSize tableSize(*this, aTableElement, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
// Prevent rules testing until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eDeleteNode, nsIEditor::eNext);
// Scan through cells in row to do rowspan adjustments
// Note that after we delete row, startRowIndex will point to the cells in
// the next row to be deleted.
// The list of cells we will change rowspan in and the new rowspan values
// for each.
struct MOZ_STACK_CLASS SpanCell final {
RefPtr<Element> mElement;
int32_t mNewRowSpanValue;
SpanCell(Element* aSpanCellElement, int32_t aNewRowSpanValue)
: mElement(aSpanCellElement), mNewRowSpanValue(aNewRowSpanValue) {}
};
AutoTArray<SpanCell, 10> spanCellArray;
RefPtr<Element> cellInDeleteRow;
int32_t columnIndex = 0;
IgnoredErrorResult ignoredError;
while (aRowIndex < tableSize.mRowCount &&
columnIndex < tableSize.mColumnCount) {
CellData cellData(*this, aTableElement, aRowIndex, columnIndex,
ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// XXX So, we should distinguish if CellDate returns error or just not
// found later.
if (!cellData.mElement) {
break;
}
// Compensate for cells that don't start or extend below the row we are
// deleting.
if (cellData.IsSpannedFromOtherRow()) {
// If a cell starts in row above us, decrease its rowspan to keep table
// rectangular but we don't need to do this if rowspan=0, since it will
// be automatically adjusted.
if (cellData.mRowSpan > 0) {
// Build list of cells to change rowspan. We can't do it now since
// it upsets cell map, so we will do it after deleting the row.
int32_t newRowSpanValue = std::max(cellData.NumberOfPrecedingRows(),
cellData.NumberOfFollowingRows());
spanCellArray.AppendElement(
SpanCell(cellData.mElement, newRowSpanValue));
}
} else {
if (cellData.mRowSpan > 1) {
// Cell spans below row to delete, so we must insert new cells to
// keep rows below. Note that we test "rowSpan" so we don't do this
// if rowSpan = 0 (automatic readjustment).
int32_t aboveRowToInsertNewCellInto =
cellData.NumberOfPrecedingRows() + 1;
nsresult rv = SplitCellIntoRows(
&aTableElement, cellData.mFirst.mRow, cellData.mFirst.mColumn,
aboveRowToInsertNewCellInto, cellData.NumberOfFollowingRows(),
nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
if (!cellInDeleteRow) {
// Reference cell to find row to delete.
cellInDeleteRow = std::move(cellData.mElement);
}
}
// Skip over other columns spanned by this cell
columnIndex += cellData.mEffectiveColSpan;
}
// Things are messed up if we didn't find a cell in the row!
if (NS_WARN_IF(!cellInDeleteRow)) {
return NS_ERROR_FAILURE;
}
// Delete the entire row.
RefPtr<Element> parentRow =
GetElementOrParentByTagNameInternal(*nsGkAtoms::tr, *cellInDeleteRow);
if (parentRow) {
nsresult rv = DeleteNodeWithTransaction(*parentRow);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
// Now we can set new rowspans for cells stored above.
for (SpanCell& spanCell : spanCellArray) {
if (NS_WARN_IF(!spanCell.mElement)) {
continue;
}
nsresult rv =
SetRowSpan(MOZ_KnownLive(spanCell.mElement), spanCell.mNewRowSpanValue);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::SelectTable() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<Element> table =
GetElementOrParentByTagNameAtSelection(*nsGkAtoms::table);
if (NS_WARN_IF(!table)) {
return NS_OK; // Don't fail if we didn't find a table.
}
nsresult rv = ClearSelection();
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
rv = AppendNodeToSelectionAsRange(table);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::SelectTableCell() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<Element> cell = GetElementOrParentByTagNameAtSelection(*nsGkAtoms::td);
if (NS_WARN_IF(!cell)) {
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
nsresult rv = ClearSelection();
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
rv = AppendNodeToSelectionAsRange(cell);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::SelectBlockOfCells(Element* aStartCell, Element* aEndCell) {
if (NS_WARN_IF(!aStartCell) || NS_WARN_IF(!aEndCell)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<Element> table =
GetElementOrParentByTagNameInternal(*nsGkAtoms::table, *aStartCell);
if (NS_WARN_IF(!table)) {
return NS_ERROR_FAILURE;
}
RefPtr<Element> endTable =
GetElementOrParentByTagNameInternal(*nsGkAtoms::table, *aEndCell);
if (NS_WARN_IF(!endTable)) {
return NS_ERROR_FAILURE;
}
// We can only select a block if within the same table,
// so do nothing if not within one table
if (table != endTable) {
return NS_OK;
}
ErrorResult error;
CellIndexes startCellIndexes(*aStartCell, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
CellIndexes endCellIndexes(*aEndCell, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
// Suppress nsISelectionListener notification
// until all selection changes are finished
SelectionBatcher selectionBatcher(SelectionRefPtr());
// Examine all cell nodes in current selection and
// remove those outside the new block cell region
int32_t minColumn =
std::min(startCellIndexes.mColumn, endCellIndexes.mColumn);
int32_t minRow = std::min(startCellIndexes.mRow, endCellIndexes.mRow);
int32_t maxColumn =
std::max(startCellIndexes.mColumn, endCellIndexes.mColumn);
int32_t maxRow = std::max(startCellIndexes.mRow, endCellIndexes.mRow);
RefPtr<Element> cell = GetFirstSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
if (!cell) {
return NS_OK;
}
RefPtr<nsRange> range = SelectionRefPtr()->GetRangeAt(0);
MOZ_ASSERT(range);
while (cell) {
CellIndexes currentCellIndexes(*cell, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
if (currentCellIndexes.mRow < maxRow || currentCellIndexes.mRow > maxRow ||
currentCellIndexes.mColumn < maxColumn ||
currentCellIndexes.mColumn > maxColumn) {
SelectionRefPtr()->RemoveRangeAndUnselectFramesAndNotifyListeners(
*range, IgnoreErrors());
// Since we've removed the range, decrement pointer to next range
MOZ_ASSERT(mSelectedCellIndex > 0);
mSelectedCellIndex--;
}
cell = GetNextSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
if (cell) {
MOZ_ASSERT(mSelectedCellIndex > 0);
range = SelectionRefPtr()->GetRangeAt(mSelectedCellIndex - 1);
}
}
nsresult rv = NS_OK;
IgnoredErrorResult ignoredError;
for (int32_t row = minRow; row <= maxRow; row++) {
CellData cellData;
for (int32_t col = minColumn; col <= maxColumn;
col = cellData.NextColumnIndex()) {
cellData.Update(*this, *table, row, col, ignoredError);
if (cellData.FailedOrNotFound()) {
return NS_ERROR_FAILURE;
}
// Skip cells that already selected or are spanned from previous locations
// XXX So, we should distinguish whether CellData returns error or just
// not found later.
if (!cellData.mIsSelected && cellData.mElement &&
!cellData.IsSpannedFromOtherRowOrColumn()) {
rv = AppendNodeToSelectionAsRange(cellData.mElement);
if (NS_FAILED(rv)) {
break;
}
}
MOZ_ASSERT(col < cellData.NextColumnIndex());
}
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return rv;
}
NS_IMETHODIMP
HTMLEditor::SelectAllTableCells() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<Element> cell = GetElementOrParentByTagNameAtSelection(*nsGkAtoms::td);
if (NS_WARN_IF(!cell)) {
// Don't fail if we didn't find a cell.
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
RefPtr<Element> startCell = cell;
// Get parent table
RefPtr<Element> table =
GetElementOrParentByTagNameInternal(*nsGkAtoms::table, *cell);
if (NS_WARN_IF(!table)) {
return NS_ERROR_FAILURE;
}
ErrorResult error;
TableSize tableSize(*this, *table, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
// Suppress nsISelectionListener notification
// until all selection changes are finished
SelectionBatcher selectionBatcher(SelectionRefPtr());
// It is now safe to clear the selection
// BE SURE TO RESET IT BEFORE LEAVING!
nsresult rv = ClearSelection();
// Select all cells in the same column as current cell
bool cellSelected = false;
IgnoredErrorResult ignoredError;
for (int32_t row = 0; row < tableSize.mRowCount; row++) {
CellData cellData;
for (int32_t col = 0; col < tableSize.mColumnCount;
col = cellData.NextColumnIndex()) {
cellData.Update(*this, *table, row, col, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
rv = NS_ERROR_FAILURE;
break;
}
// Skip cells that are spanned from previous rows or columns
// XXX So, we should distinguish whether CellData returns error or just
// not found later.
if (cellData.mElement && !cellData.IsSpannedFromOtherRowOrColumn()) {
rv = AppendNodeToSelectionAsRange(cellData.mElement);
if (NS_FAILED(rv)) {
break;
}
cellSelected = true;
}
MOZ_ASSERT(col < cellData.NextColumnIndex());
}
}
// Safety code to select starting cell if nothing else was selected
if (!cellSelected) {
rv = AppendNodeToSelectionAsRange(startCell);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::SelectTableRow() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<Element> cell = GetElementOrParentByTagNameAtSelection(*nsGkAtoms::td);
if (NS_WARN_IF(!cell)) {
// Don't fail if we didn't find a cell.
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
RefPtr<Element> startCell = cell;
// Get table and location of cell:
RefPtr<Element> table;
int32_t startRowIndex, startColIndex;
nsresult rv =
GetCellContext(getter_AddRefs(table), getter_AddRefs(cell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
if (NS_WARN_IF(!table)) {
return NS_ERROR_FAILURE;
}
ErrorResult error;
TableSize tableSize(*this, *table, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
// Note: At this point, we could get first and last cells in row,
// then call SelectBlockOfCells, but that would take just
// a little less code, so the following is more efficient
// Suppress nsISelectionListener notification
// until all selection changes are finished
SelectionBatcher selectionBatcher(SelectionRefPtr());
// It is now safe to clear the selection
// BE SURE TO RESET IT BEFORE LEAVING!
rv = ClearSelection();
// Select all cells in the same row as current cell
bool cellSelected = false;
IgnoredErrorResult ignoredError;
CellData cellData;
for (int32_t col = 0; col < tableSize.mColumnCount;
col = cellData.NextColumnIndex()) {
cellData.Update(*this, *table, startRowIndex, col, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
rv = NS_ERROR_FAILURE;
break;
}
// Skip cells that are spanned from previous rows or columns
// XXX So, we should distinguish whether CellData returns error or just
// not found later.
if (cellData.mElement && !cellData.IsSpannedFromOtherRowOrColumn()) {
rv = AppendNodeToSelectionAsRange(cellData.mElement);
if (NS_FAILED(rv)) {
break;
}
cellSelected = true;
}
MOZ_ASSERT(col < cellData.NextColumnIndex());
}
// Safety code to select starting cell if nothing else was selected
if (!cellSelected) {
return AppendNodeToSelectionAsRange(startCell);
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::SelectTableColumn() {
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<Element> cell = GetElementOrParentByTagNameAtSelection(*nsGkAtoms::td);
if (NS_WARN_IF(!cell)) {
// Don't fail if we didn't find a cell.
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
RefPtr<Element> startCell = cell;
// Get location of cell:
RefPtr<Element> table;
int32_t startRowIndex, startColIndex;
nsresult rv =
GetCellContext(getter_AddRefs(table), getter_AddRefs(cell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
if (NS_WARN_IF(!table)) {
return NS_ERROR_FAILURE;
}
ErrorResult error;
TableSize tableSize(*this, *table, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
// Suppress nsISelectionListener notification
// until all selection changes are finished
SelectionBatcher selectionBatcher(SelectionRefPtr());
// It is now safe to clear the selection
// BE SURE TO RESET IT BEFORE LEAVING!
rv = ClearSelection();
// Select all cells in the same column as current cell
bool cellSelected = false;
IgnoredErrorResult ignoredError;
CellData cellData;
for (int32_t row = 0; row < tableSize.mRowCount;
row = cellData.NextRowIndex()) {
cellData.Update(*this, *table, row, startColIndex, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
rv = NS_ERROR_FAILURE;
break;
}
// Skip cells that are spanned from previous rows or columns
// XXX So, we should distinguish whether CellData returns error or just
// not found later.
if (cellData.mElement && !cellData.IsSpannedFromOtherRowOrColumn()) {
rv = AppendNodeToSelectionAsRange(cellData.mElement);
if (NS_FAILED(rv)) {
break;
}
cellSelected = true;
}
MOZ_ASSERT(row < cellData.NextRowIndex());
}
// Safety code to select starting cell if nothing else was selected
if (!cellSelected) {
return AppendNodeToSelectionAsRange(startCell);
}
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::SplitTableCell() {
AutoEditActionDataSetter editActionData(*this,
EditAction::eSplitTableCellElement);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<Element> table;
RefPtr<Element> cell;
int32_t startRowIndex, startColIndex, actualRowSpan, actualColSpan;
// Get cell, table, etc. at selection anchor node
nsresult rv =
GetCellContext(getter_AddRefs(table), getter_AddRefs(cell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
if (!table || !cell) {
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
// We need rowspan and colspan data
rv = GetCellSpansAt(table, startRowIndex, startColIndex, actualRowSpan,
actualColSpan);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
// Must have some span to split
if (actualRowSpan <= 1 && actualColSpan <= 1) {
return NS_OK;
}
AutoPlaceholderBatch treateAsOneTransaction(*this);
// Prevent auto insertion of BR in new cell until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eInsertNode, nsIEditor::eNext);
// We reset selection
AutoSelectionSetterAfterTableEdit setCaret(
*this, table, startRowIndex, startColIndex, ePreviousColumn, false);
//...so suppress Rules System selection munging
AutoTransactionsConserveSelection dontChangeSelection(*this);
RefPtr<Element> newCell;
int32_t rowIndex = startRowIndex;
int32_t rowSpanBelow, colSpanAfter;
// Split up cell row-wise first into rowspan=1 above, and the rest below,
// whittling away at the cell below until no more extra span
for (rowSpanBelow = actualRowSpan - 1; rowSpanBelow >= 0; rowSpanBelow--) {
// We really split row-wise only if we had rowspan > 1
if (rowSpanBelow > 0) {
rv = SplitCellIntoRows(table, rowIndex, startColIndex, 1, rowSpanBelow,
getter_AddRefs(newCell));
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
CopyCellBackgroundColor(newCell, cell);
}
int32_t colIndex = startColIndex;
// Now split the cell with rowspan = 1 into cells if it has colSpan > 1
for (colSpanAfter = actualColSpan - 1; colSpanAfter > 0; colSpanAfter--) {
rv = SplitCellIntoColumns(table, rowIndex, colIndex, 1, colSpanAfter,
getter_AddRefs(newCell));
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
CopyCellBackgroundColor(newCell, cell);
colIndex++;
}
// Point to the new cell and repeat
rowIndex++;
}
return NS_OK;
}
nsresult HTMLEditor::CopyCellBackgroundColor(Element* aDestCell,
Element* aSourceCell) {
if (NS_WARN_IF(!aDestCell) || NS_WARN_IF(!aSourceCell)) {
return NS_ERROR_INVALID_ARG;
}
// Copy backgournd color to new cell.
nsAutoString color;
bool isSet;
nsresult rv = GetAttributeValue(aSourceCell, NS_LITERAL_STRING("bgcolor"),
color, &isSet);
if (NS_FAILED(rv)) {
return rv;
}
if (!isSet) {
return NS_OK;
}
return SetAttributeWithTransaction(*aDestCell, *nsGkAtoms::bgcolor, color);
}
nsresult HTMLEditor::SplitCellIntoColumns(Element* aTable, int32_t aRowIndex,
int32_t aColIndex,
int32_t aColSpanLeft,
int32_t aColSpanRight,
Element** aNewCell) {
if (NS_WARN_IF(!aTable)) {
return NS_ERROR_INVALID_ARG;
}
if (aNewCell) {
*aNewCell = nullptr;
}
IgnoredErrorResult ignoredError;
CellData cellData(*this, *aTable, aRowIndex, aColIndex, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// We can't split!
if (cellData.mEffectiveColSpan <= 1 ||
aColSpanLeft + aColSpanRight > cellData.mEffectiveColSpan) {
return NS_OK;
}
// Reduce colspan of cell to split
nsresult rv = SetColSpan(MOZ_KnownLive(cellData.mElement), aColSpanLeft);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Insert new cell after using the remaining span
// and always get the new cell so we can copy the background color;
RefPtr<Element> newCellElement;
rv = InsertCell(MOZ_KnownLive(cellData.mElement), cellData.mEffectiveRowSpan,
aColSpanRight, true, false, getter_AddRefs(newCellElement));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (!newCellElement) {
return NS_OK;
}
if (aNewCell) {
NS_ADDREF(*aNewCell = newCellElement.get());
}
rv =
CopyCellBackgroundColor(newCellElement, MOZ_KnownLive(cellData.mElement));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
nsresult HTMLEditor::SplitCellIntoRows(Element* aTable, int32_t aRowIndex,
int32_t aColIndex, int32_t aRowSpanAbove,
int32_t aRowSpanBelow,
Element** aNewCell) {
if (NS_WARN_IF(!aTable)) {
return NS_ERROR_INVALID_ARG;
}
if (aNewCell) {
*aNewCell = nullptr;
}
IgnoredErrorResult ignoredError;
CellData cellData(*this, *aTable, aRowIndex, aColIndex, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// We can't split!
if (cellData.mEffectiveRowSpan <= 1 ||
aRowSpanAbove + aRowSpanBelow > cellData.mEffectiveRowSpan) {
return NS_OK;
}
ErrorResult error;
TableSize tableSize(*this, *aTable, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
// Find a cell to insert before or after
RefPtr<Element> cellElementAtInsertionPoint;
RefPtr<Element> lastCellFound;
bool insertAfter = (cellData.mFirst.mColumn > 0);
CellData cellDataAtInsertionPoint;
for (int32_t colIndex = 0,
rowBelowIndex = cellData.mFirst.mRow + aRowSpanAbove;
colIndex <= tableSize.mColumnCount;
colIndex = cellData.NextColumnIndex()) {
cellDataAtInsertionPoint.Update(*this, *aTable, rowBelowIndex, colIndex,
ignoredError);
// If we fail here, it could be because row has bad rowspan values,
// such as all cells having rowspan > 1 (Call FixRowSpan first!).
// XXX According to the comment, this does not assume that
// FixRowSpan() doesn't work well and user can create non-rectangular
// table. So, we should not return error when CellData cannot find
// a cell.
if (NS_WARN_IF(cellDataAtInsertionPoint.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// FYI: Don't use std::move() here since the following checks will use
// utility methods of cellDataAtInsertionPoint, but some of them
// check whether its mElement is not nullptr.
cellElementAtInsertionPoint = cellDataAtInsertionPoint.mElement;
// Skip over cells spanned from above (like the one we are splitting!)
if (cellDataAtInsertionPoint.mElement &&
!cellDataAtInsertionPoint.IsSpannedFromOtherRow()) {
if (!insertAfter) {
// Inserting before, so stop at first cell in row we want to insert
// into.
break;
}
// New cell isn't first in row,
// so stop after we find the cell just before new cell's column
if (cellDataAtInsertionPoint.NextColumnIndex() ==
cellData.mFirst.mColumn) {
break;
}
// If cell found is AFTER desired new cell colum,
// we have multiple cells with rowspan > 1 that
// prevented us from finding a cell to insert after...
if (cellDataAtInsertionPoint.mFirst.mColumn > cellData.mFirst.mColumn) {
// ... so instead insert before the cell we found
insertAfter = false;
break;
}
// FYI: Don't use std::move() here since
// cellDataAtInsertionPoint.NextColumnIndex() needs it.
lastCellFound = cellDataAtInsertionPoint.mElement;
}
MOZ_ASSERT(colIndex < cellDataAtInsertionPoint.NextColumnIndex());
}
if (!cellElementAtInsertionPoint && lastCellFound) {
// Edge case where we didn't find a cell to insert after
// or before because column(s) before desired column
// and all columns after it are spanned from above.
// We can insert after the last cell we found
cellElementAtInsertionPoint = std::move(lastCellFound);
insertAfter = true; // Should always be true, but let's be sure
}
// Reduce rowspan of cell to split
nsresult rv = SetRowSpan(MOZ_KnownLive(cellData.mElement), aRowSpanAbove);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
// Insert new cell after using the remaining span
// and always get the new cell so we can copy the background color;
RefPtr<Element> newCell;
rv = InsertCell(cellElementAtInsertionPoint, aRowSpanBelow,
cellData.mEffectiveColSpan, insertAfter, false,
getter_AddRefs(newCell));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (!newCell) {
return NS_OK;
}
if (aNewCell) {
NS_ADDREF(*aNewCell = newCell.get());
}
rv = CopyCellBackgroundColor(newCell, cellElementAtInsertionPoint);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::SwitchTableCellHeaderType(Element* aSourceCell,
Element** aNewCell) {
if (NS_WARN_IF(!aSourceCell)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this,
EditAction::eSetTableCellElementType);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
AutoPlaceholderBatch treatAsOneTransaction(*this);
// Prevent auto insertion of BR in new cell created by
// ReplaceContainerAndCloneAttributesWithTransaction().
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eInsertNode, nsIEditor::eNext);
// Save current selection to restore when done.
// This is needed so ReplaceContainerAndCloneAttributesWithTransaction()
// can monitor selection when replacing nodes.
AutoSelectionRestorer restoreSelectionLater(*this);
// Set to the opposite of current type
nsAtom* newCellName =
aSourceCell->IsHTMLElement(nsGkAtoms::td) ? nsGkAtoms::th : nsGkAtoms::td;
// This creates new node, moves children, copies attributes (true)
// and manages the selection!
RefPtr<Element> newCell = ReplaceContainerAndCloneAttributesWithTransaction(
*aSourceCell, MOZ_KnownLive(*newCellName));
if (NS_WARN_IF(!newCell)) {
return NS_ERROR_FAILURE;
}
// Return the new cell
if (aNewCell) {
newCell.forget(aNewCell);
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::JoinTableCells(bool aMergeNonContiguousContents) {
AutoEditActionDataSetter editActionData(*this,
EditAction::eJoinTableCellElements);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
RefPtr<Element> table;
RefPtr<Element> targetCell;
int32_t startRowIndex, startColIndex;
// Get cell, table, etc. at selection anchor node
nsresult rv =
GetCellContext(getter_AddRefs(table), getter_AddRefs(targetCell), nullptr,
nullptr, &startRowIndex, &startColIndex);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
if (!table || !targetCell) {
return NS_OK;
}
AutoPlaceholderBatch treateAsOneTransaction(*this);
// Don't let Rules System change the selection
AutoTransactionsConserveSelection dontChangeSelection(*this);
// Note: We dont' use AutoSelectionSetterAfterTableEdit here so the selection
// is retained after joining. This leaves the target cell selected
// as well as the "non-contiguous" cells, so user can see what happened.
ErrorResult error;
CellAndIndexes firstSelectedCell(*this, *SelectionRefPtr(), error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
bool joinSelectedCells = false;
if (firstSelectedCell.mElement) {
RefPtr<Element> secondCell = GetNextSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
// If only one cell is selected, join with cell to the right
joinSelectedCells = (secondCell != nullptr);
}
if (joinSelectedCells) {
// We have selected cells: Join just contiguous cells
// and just merge contents if not contiguous
TableSize tableSize(*this, *table, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
// Get spans for cell we will merge into
int32_t firstRowSpan, firstColSpan;
rv = GetCellSpansAt(table, firstSelectedCell.mIndexes.mRow,
firstSelectedCell.mIndexes.mColumn, firstRowSpan,
firstColSpan);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
// This defines the last indexes along the "edges"
// of the contiguous block of cells, telling us
// that we can join adjacent cells to the block
// Start with same as the first values,
// then expand as we find adjacent selected cells
int32_t lastRowIndex = firstSelectedCell.mIndexes.mRow;
int32_t lastColIndex = firstSelectedCell.mIndexes.mColumn;
// First pass: Determine boundaries of contiguous rectangular block that
// we will join into one cell, favoring adjacent cells in the same row.
IgnoredErrorResult ignoredError;
for (int32_t rowIndex = firstSelectedCell.mIndexes.mRow;
rowIndex <= lastRowIndex; rowIndex++) {
int32_t currentRowCount = tableSize.mRowCount;
// Be sure each row doesn't have rowspan errors
rv = FixBadRowSpan(table, rowIndex, tableSize.mRowCount);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
// Adjust rowcount by number of rows we removed
lastRowIndex -= currentRowCount - tableSize.mRowCount;
bool cellFoundInRow = false;
bool lastRowIsSet = false;
int32_t lastColInRow = 0;
int32_t firstColInRow = firstSelectedCell.mIndexes.mColumn;
int32_t colIndex = firstSelectedCell.mIndexes.mColumn;
for (CellData cellData; colIndex < tableSize.mColumnCount;
colIndex = cellData.NextColumnIndex()) {
cellData.Update(*this, *table, rowIndex, colIndex, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
if (cellData.mIsSelected) {
if (!cellFoundInRow) {
// We've just found the first selected cell in this row
firstColInRow = cellData.mCurrent.mColumn;
}
if (cellData.mCurrent.mRow > firstSelectedCell.mIndexes.mRow &&
firstColInRow != firstSelectedCell.mIndexes.mColumn) {
// We're in at least the second row,
// but left boundary is "ragged" (not the same as 1st row's start)
// Let's just end block on previous row
// and keep previous lastColIndex
// TODO: We could try to find the Maximum firstColInRow
// so our block can still extend down more rows?
lastRowIndex = std::max(0, cellData.mCurrent.mRow - 1);
lastRowIsSet = true;
break;
}
// Save max selected column in this row, including extra colspan
lastColInRow = cellData.LastColumnIndex();
cellFoundInRow = true;
} else if (cellFoundInRow) {
// No cell or not selected, but at least one cell in row was found
if (cellData.mCurrent.mRow > firstSelectedCell.mIndexes.mRow + 1 &&
cellData.mCurrent.mColumn <= lastColIndex) {
// Cell is in a column less than current right border in
// the third or higher selected row, so stop block at the previous
// row
lastRowIndex = std::max(0, cellData.mCurrent.mRow - 1);
lastRowIsSet = true;
}
// We're done with this row
break;
}
MOZ_ASSERT(colIndex < cellData.NextColumnIndex());
} // End of column loop
// Done with this row
if (cellFoundInRow) {
if (rowIndex == firstSelectedCell.mIndexes.mRow) {
// First row always initializes the right boundary
lastColIndex = lastColInRow;
}
// If we didn't determine last row above...
if (!lastRowIsSet) {
if (colIndex < lastColIndex) {
// (don't think we ever get here?)
// Cell is in a column less than current right boundary,
// so stop block at the previous row
lastRowIndex = std::max(0, rowIndex - 1);
} else {
// Go on to examine next row
lastRowIndex = rowIndex + 1;
}
}
// Use the minimum col we found so far for right boundary
lastColIndex = std::min(lastColIndex, lastColInRow);
} else {
// No selected cells in this row -- stop at row above
// and leave last column at its previous value
lastRowIndex = std::max(0, rowIndex - 1);
}
}
// The list of cells we will delete after joining
nsTArray<RefPtr<Element>> deleteList;
// 2nd pass: Do the joining and merging
for (int32_t rowIndex = 0; rowIndex < tableSize.mRowCount; rowIndex++) {
CellData cellData;
for (int32_t colIndex = 0; colIndex < tableSize.mColumnCount;
colIndex = cellData.NextColumnIndex()) {
cellData.Update(*this, *table, rowIndex, colIndex, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// If this is 0, we are past last cell in row, so exit the loop
if (!cellData.mEffectiveColSpan) {
break;
}
// Merge only selected cells (skip cell we're merging into, of course)
if (cellData.mIsSelected &&
cellData.mElement != firstSelectedCell.mElement) {
if (cellData.mCurrent.mRow >= firstSelectedCell.mIndexes.mRow &&
cellData.mCurrent.mRow <= lastRowIndex &&
cellData.mCurrent.mColumn >= firstSelectedCell.mIndexes.mColumn &&
cellData.mCurrent.mColumn <= lastColIndex) {
// We are within the join region
// Problem: It is very tricky to delete cells as we merge,
// since that will upset the cellmap
// Instead, build a list of cells to delete and do it later
NS_ASSERTION(!cellData.IsSpannedFromOtherRow(),
"JoinTableCells: StartRowIndex is in row above");
if (cellData.mEffectiveColSpan > 1) {
// Check if cell "hangs" off the boundary because of colspan > 1
// Use split methods to chop off excess
int32_t extraColSpan = cellData.mFirst.mColumn +
cellData.mEffectiveColSpan -
(lastColIndex + 1);
if (extraColSpan > 0) {
rv = SplitCellIntoColumns(
table, cellData.mFirst.mRow, cellData.mFirst.mColumn,
cellData.mEffectiveColSpan - extraColSpan, extraColSpan,
nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
}
}
rv = MergeCells(firstSelectedCell.mElement, cellData.mElement,
false);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
// Add cell to list to delete
deleteList.AppendElement(cellData.mElement.get());
} else if (aMergeNonContiguousContents) {
// Cell is outside join region -- just merge the contents
rv = MergeCells(firstSelectedCell.mElement, cellData.mElement,
false);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
}
MOZ_ASSERT(colIndex < cellData.NextColumnIndex());
}
}
// All cell contents are merged. Delete the empty cells we accumulated
// Prevent rules testing until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eDeleteNode, nsIEditor::eNext);
for (uint32_t i = 0, n = deleteList.Length(); i < n; i++) {
RefPtr<Element> nodeToBeRemoved = deleteList[i];
if (nodeToBeRemoved) {
rv = DeleteNodeWithTransaction(*nodeToBeRemoved);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
}
}
// Cleanup selection: remove ranges where cells were deleted
uint32_t rangeCount = SelectionRefPtr()->RangeCount();
RefPtr<nsRange> range;
for (uint32_t i = 0; i < rangeCount; i++) {
range = SelectionRefPtr()->GetRangeAt(i);
if (NS_WARN_IF(!range)) {
return NS_ERROR_FAILURE;
}
RefPtr<Element> deletedCell;
HTMLEditor::GetCellFromRange(range, getter_AddRefs(deletedCell));
if (!deletedCell) {
SelectionRefPtr()->RemoveRangeAndUnselectFramesAndNotifyListeners(
*range, IgnoreErrors());
rangeCount--;
i--;
}
}
// Set spans for the cell everything merged into
rv = SetRowSpan(MOZ_KnownLive(firstSelectedCell.mElement),
lastRowIndex - firstSelectedCell.mIndexes.mRow + 1);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
rv = SetColSpan(MOZ_KnownLive(firstSelectedCell.mElement),
lastColIndex - firstSelectedCell.mIndexes.mColumn + 1);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
// Fixup disturbances in table layout
DebugOnly<nsresult> rv = NormalizeTableInternal(*table);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to normalize the table");
} else {
// Joining with cell to the right -- get rowspan and colspan data of target
// cell.
IgnoredErrorResult ignoredError;
CellData leftCellData(*this, *table, startRowIndex, startColIndex,
ignoredError);
if (NS_WARN_IF(leftCellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// Get data for cell to the right.
CellData rightCellData(
*this, *table, leftCellData.mFirst.mRow,
leftCellData.mFirst.mColumn + leftCellData.mEffectiveColSpan,
ignoredError);
if (NS_WARN_IF(rightCellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// XXX So, this does not assume that CellData returns error when just not
// found. We need to fix this later.
if (!rightCellData.mElement) {
return NS_OK; // Don't fail if there's no cell
}
// sanity check
NS_ASSERTION(
rightCellData.mCurrent.mRow >= rightCellData.mFirst.mRow,
"JoinCells: rightCellData.mCurrent.mRow < rightCellData.mFirst.mRow");
// Figure out span of merged cell starting from target's starting row
// to handle case of merged cell starting in a row above
int32_t spanAboveMergedCell = rightCellData.NumberOfPrecedingRows();
int32_t effectiveRowSpan2 =
rightCellData.mEffectiveRowSpan - spanAboveMergedCell;
if (effectiveRowSpan2 > leftCellData.mEffectiveRowSpan) {
// Cell to the right spans into row below target
// Split off portion below target cell's bottom-most row
rv = SplitCellIntoRows(
table, rightCellData.mFirst.mRow, rightCellData.mFirst.mColumn,
spanAboveMergedCell + leftCellData.mEffectiveRowSpan,
effectiveRowSpan2 - leftCellData.mEffectiveRowSpan, nullptr);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
}
// Move contents from cell to the right
// Delete the cell now only if it starts in the same row
// and has enough row "height"
rv = MergeCells(leftCellData.mElement, rightCellData.mElement,
!rightCellData.IsSpannedFromOtherRow() &&
effectiveRowSpan2 >= leftCellData.mEffectiveRowSpan);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
if (effectiveRowSpan2 < leftCellData.mEffectiveRowSpan) {
// Merged cell is "shorter"
// (there are cells(s) below it that are row-spanned by target cell)
// We could try splitting those cells, but that's REAL messy,
// so the safest thing to do is NOT really join the cells
return NS_OK;
}
if (spanAboveMergedCell > 0) {
// Cell we merged started in a row above the target cell
// Reduce rowspan to give room where target cell will extend its colspan
rv = SetRowSpan(MOZ_KnownLive(rightCellData.mElement),
spanAboveMergedCell);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
}
// Reset target cell's colspan to encompass cell to the right
rv = SetColSpan(
MOZ_KnownLive(leftCellData.mElement),
leftCellData.mEffectiveColSpan + rightCellData.mEffectiveColSpan);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
}
return NS_OK;
}
nsresult HTMLEditor::MergeCells(RefPtr<Element> aTargetCell,
RefPtr<Element> aCellToMerge,
bool aDeleteCellToMerge) {
NS_ENSURE_TRUE(aTargetCell && aCellToMerge, NS_ERROR_NULL_POINTER);
// Prevent rules testing until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eDeleteNode, nsIEditor::eNext);
// Don't need to merge if cell is empty
if (!IsEmptyCell(aCellToMerge)) {
// Get index of last child in target cell
// If we fail or don't have children,
// we insert at index 0
int32_t insertIndex = 0;
// Start inserting just after last child
uint32_t len = aTargetCell->GetChildCount();
if (len == 1 && IsEmptyCell(aTargetCell)) {
// Delete the empty node
nsCOMPtr<nsIContent> cellChild = aTargetCell->GetFirstChild();
if (NS_WARN_IF(!cellChild)) {
return NS_ERROR_FAILURE;
}
nsresult rv = DeleteNodeWithTransaction(*cellChild);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
insertIndex = 0;
} else {
insertIndex = (int32_t)len;
}
// Move the contents
while (aCellToMerge->HasChildren()) {
nsCOMPtr<nsIContent> cellChild = aCellToMerge->GetLastChild();
if (NS_WARN_IF(!cellChild)) {
return NS_ERROR_FAILURE;
}
nsresult rv = DeleteNodeWithTransaction(*cellChild);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
rv = InsertNodeWithTransaction(*cellChild,
EditorDOMPoint(aTargetCell, insertIndex));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
}
if (!aDeleteCellToMerge) {
return NS_OK;
}
// Delete cells whose contents were moved.
nsresult rv = DeleteNodeWithTransaction(*aCellToMerge);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
return NS_OK;
}
nsresult HTMLEditor::FixBadRowSpan(Element* aTable, int32_t aRowIndex,
int32_t& aNewRowCount) {
if (NS_WARN_IF(!aTable)) {
return NS_ERROR_INVALID_ARG;
}
ErrorResult error;
TableSize tableSize(*this, *aTable, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
int32_t minRowSpan = -1;
IgnoredErrorResult ignoredError;
CellData cellData;
for (int32_t colIndex = 0; colIndex < tableSize.mColumnCount;
colIndex = cellData.NextColumnIndex()) {
cellData.Update(*this, *aTable, aRowIndex, colIndex, ignoredError);
// NOTE: This is a *real* failure.
// CellData passes if cell is missing from cellmap
// XXX If <table> has large rowspan value or colspan value than actual
// cells, we may hit error. So, this method is always failed to
// "fix" the rowspan...
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// XXX So, this does not assume that CellData returns error when just not
// found. We need to fix this later.
if (!cellData.mElement) {
break;
}
if (cellData.mRowSpan > 0 && !cellData.IsSpannedFromOtherRow() &&
(cellData.mRowSpan < minRowSpan || minRowSpan == -1)) {
minRowSpan = cellData.mRowSpan;
}
MOZ_ASSERT(colIndex < cellData.NextColumnIndex());
}
if (minRowSpan > 1) {
// The amount to reduce everyone's rowspan
// so at least one cell has rowspan = 1
int32_t rowsReduced = minRowSpan - 1;
CellData cellData;
for (int32_t colIndex = 0; colIndex < tableSize.mColumnCount;
colIndex = cellData.NextColumnIndex()) {
cellData.Update(*this, *aTable, aRowIndex, colIndex, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// Fixup rowspans only for cells starting in current row
// XXX So, this does not assume that CellData returns error when just
// not found a cell. Fix this later.
if (cellData.mElement && cellData.mRowSpan > 0 &&
!cellData.IsSpannedFromOtherRowOrColumn()) {
nsresult rv = SetRowSpan(MOZ_KnownLive(cellData.mElement),
cellData.mRowSpan - rowsReduced);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
MOZ_ASSERT(colIndex < cellData.NextColumnIndex());
}
}
tableSize.Update(*this, *aTable, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
aNewRowCount = tableSize.mRowCount;
return NS_OK;
}
nsresult HTMLEditor::FixBadColSpan(Element* aTable, int32_t aColIndex,
int32_t& aNewColCount) {
if (NS_WARN_IF(!aTable)) {
return NS_ERROR_INVALID_ARG;
}
ErrorResult error;
TableSize tableSize(*this, *aTable, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
int32_t minColSpan = -1;
IgnoredErrorResult ignoredError;
CellData cellData;
for (int32_t rowIndex = 0; rowIndex < tableSize.mRowCount;
rowIndex = cellData.NextRowIndex()) {
cellData.Update(*this, *aTable, rowIndex, aColIndex, ignoredError);
// NOTE: This is a *real* failure.
// CellData passes if cell is missing from cellmap
// XXX If <table> has large rowspan value or colspan value than actual
// cells, we may hit error. So, this method is always failed to
// "fix" the colspan...
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// XXX So, this does not assume that CellData returns error when just
// not found a cell. Fix this later.
if (!cellData.mElement) {
break;
}
if (cellData.mColSpan > 0 && !cellData.IsSpannedFromOtherColumn() &&
(cellData.mColSpan < minColSpan || minColSpan == -1)) {
minColSpan = cellData.mColSpan;
}
MOZ_ASSERT(rowIndex < cellData.NextRowIndex());
}
if (minColSpan > 1) {
// The amount to reduce everyone's colspan
// so at least one cell has colspan = 1
int32_t colsReduced = minColSpan - 1;
CellData cellData;
for (int32_t rowIndex = 0; rowIndex < tableSize.mRowCount;
rowIndex = cellData.NextRowIndex()) {
cellData.Update(*this, *aTable, rowIndex, aColIndex, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
// Fixup colspans only for cells starting in current column
// XXX So, this does not assume that CellData returns error when just
// not found a cell. Fix this later.
if (cellData.mElement && cellData.mColSpan > 0 &&
!cellData.IsSpannedFromOtherRowOrColumn()) {
nsresult rv = SetColSpan(MOZ_KnownLive(cellData.mElement),
cellData.mColSpan - colsReduced);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
MOZ_ASSERT(rowIndex < cellData.NextRowIndex());
}
}
tableSize.Update(*this, *aTable, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
aNewColCount = tableSize.mColumnCount;
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::NormalizeTable(Element* aTableOrElementInTable) {
AutoEditActionDataSetter editActionData(*this, EditAction::eNormalizeTable);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
if (!aTableOrElementInTable) {
aTableOrElementInTable =
GetElementOrParentByTagNameAtSelection(*nsGkAtoms::table);
if (!aTableOrElementInTable) {
return NS_OK; // Don't throw error even if the element is not in <table>.
}
}
nsresult rv = NormalizeTableInternal(*aTableOrElementInTable);
if (NS_WARN_IF(NS_FAILED(rv))) {
return EditorBase::ToGenericNSResult(rv);
}
return NS_OK;
}
nsresult HTMLEditor::NormalizeTableInternal(Element& aTableOrElementInTable) {
MOZ_ASSERT(IsEditActionDataAvailable());
RefPtr<Element> tableElement;
if (aTableOrElementInTable.NodeInfo()->NameAtom() == nsGkAtoms::table) {
tableElement = &aTableOrElementInTable;
} else {
tableElement = GetElementOrParentByTagNameInternal(*nsGkAtoms::table,
aTableOrElementInTable);
if (!tableElement) {
return NS_OK; // Don't throw error even if the element is not in <table>.
}
}
ErrorResult error;
TableSize tableSize(*this, *tableElement, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
// Save current selection
AutoSelectionRestorer restoreSelectionLater(*this);
AutoPlaceholderBatch treateAsOneTransaction(*this);
// Prevent auto insertion of BR in new cell until we're done
AutoTopLevelEditSubActionNotifier maybeTopLevelEditSubAction(
*this, EditSubAction::eInsertNode, nsIEditor::eNext);
// XXX If there is a cell which has bigger or smaller "rowspan" or "colspan"
// values, FixBadRowSpan() will return error. So, we can do nothing
// if the table needs normalization...
// Scan all cells in each row to detect bad rowspan values
for (int32_t rowIndex = 0; rowIndex < tableSize.mRowCount; rowIndex++) {
nsresult rv = FixBadRowSpan(tableElement, rowIndex, tableSize.mRowCount);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
// and same for colspans
for (int32_t colIndex = 0; colIndex < tableSize.mColumnCount; colIndex++) {
nsresult rv = FixBadColSpan(tableElement, colIndex, tableSize.mColumnCount);
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
}
// Fill in missing cellmap locations with empty cells
IgnoredErrorResult ignoredError;
for (int32_t rowIndex = 0; rowIndex < tableSize.mRowCount; rowIndex++) {
RefPtr<Element> previousCellElementInRow;
for (int32_t colIndex = 0; colIndex < tableSize.mColumnCount; colIndex++) {
CellData cellData(*this, *tableElement, rowIndex, colIndex, ignoredError);
// NOTE: This is a *real* failure.
// CellData passes if cell is missing from cellmap
// XXX So, this method assumes that CellData won't return error when
// just not found. Fix this later.
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
if (cellData.mElement) {
// Save the last cell found in the same row we are scanning
if (!cellData.IsSpannedFromOtherRow()) {
previousCellElementInRow = std::move(cellData.mElement);
}
continue;
}
// We are missing a cell at a cellmap location.
// Add a cell after the previous cell element in the current row.
if (NS_WARN_IF(!previousCellElementInRow)) {
// We don't have any cells in this row -- We are really messed up!
return NS_ERROR_FAILURE;
}
// Insert a new cell after (true), and return the new cell to us
RefPtr<Element> newCellElement;
nsresult rv = InsertCell(previousCellElementInRow, 1, 1, true, false,
getter_AddRefs(newCellElement));
if (NS_WARN_IF(NS_FAILED(rv))) {
return rv;
}
if (newCellElement) {
previousCellElementInRow = std::move(newCellElement);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
HTMLEditor::GetCellIndexes(Element* aCellElement, int32_t* aRowIndex,
int32_t* aColumnIndex) {
if (NS_WARN_IF(!aRowIndex) || NS_WARN_IF(!aColumnIndex)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
*aRowIndex = 0;
*aColumnIndex = 0;
if (!aCellElement) {
// Use cell element which contains anchor of Selection when aCellElement is
// nullptr.
ErrorResult error;
CellIndexes cellIndexes(*this, *SelectionRefPtr(), error);
if (error.Failed()) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
*aRowIndex = cellIndexes.mRow;
*aColumnIndex = cellIndexes.mColumn;
return NS_OK;
}
ErrorResult error;
CellIndexes cellIndexes(*aCellElement, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
*aRowIndex = cellIndexes.mRow;
*aColumnIndex = cellIndexes.mColumn;
return NS_OK;
}
void HTMLEditor::CellIndexes::Update(HTMLEditor& aHTMLEditor,
Selection& aSelection, ErrorResult& aRv) {
MOZ_ASSERT(!aRv.Failed());
// Guarantee the life time of the cell element since Init() will access
// layout methods.
RefPtr<Element> cellElement =
aHTMLEditor.GetElementOrParentByTagNameAtSelection(*nsGkAtoms::td);
if (!cellElement) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
Update(*cellElement, aRv);
}
void HTMLEditor::CellIndexes::Update(Element& aCellElement, ErrorResult& aRv) {
MOZ_ASSERT(!aRv.Failed());
// XXX If the table cell is created immediately before this call, e.g.,
// using innerHTML, frames have not been created yet. In such case,
// shouldn't we flush pending layout?
nsIFrame* frameOfCell = aCellElement.GetPrimaryFrame();
if (NS_WARN_IF(!frameOfCell)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
nsITableCellLayout* tableCellLayout = do_QueryFrame(frameOfCell);
if (!tableCellLayout) {
aRv.Throw(NS_ERROR_FAILURE); // not a cell element.
return;
}
aRv = tableCellLayout->GetCellIndexes(mRow, mColumn);
NS_WARNING_ASSERTION(!aRv.Failed(), "Failed to get cell indexes");
}
// static
nsTableWrapperFrame* HTMLEditor::GetTableFrame(Element* aTableElement) {
if (NS_WARN_IF(!aTableElement)) {
return nullptr;
}
return do_QueryFrame(aTableElement->GetPrimaryFrame());
}
// Return actual number of cells (a cell with colspan > 1 counts as just 1)
int32_t HTMLEditor::GetNumberOfCellsInRow(Element& aTableElement,
int32_t aRowIndex) {
IgnoredErrorResult ignoredError;
TableSize tableSize(*this, aTableElement, ignoredError);
if (NS_WARN_IF(ignoredError.Failed())) {
return -1;
}
int32_t numberOfCells = 0;
CellData cellData;
for (int32_t columnIndex = 0; columnIndex < tableSize.mColumnCount;
columnIndex = cellData.NextColumnIndex()) {
cellData.Update(*this, aTableElement, aRowIndex, columnIndex, ignoredError);
// Failure means that there is no more cell in the row. In this case,
// we shouldn't return error since we just reach the end of the row.
// XXX So, this method assumes that CellData won't return error when
// just not found. Fix this later.
if (cellData.FailedOrNotFound()) {
break;
}
// Only count cells that start in row we are working with
if (cellData.mElement && !cellData.IsSpannedFromOtherRow()) {
numberOfCells++;
}
MOZ_ASSERT(columnIndex < cellData.NextColumnIndex());
}
return numberOfCells;
}
NS_IMETHODIMP
HTMLEditor::GetTableSize(Element* aTableOrElementInTable, int32_t* aRowCount,
int32_t* aColumnCount) {
if (NS_WARN_IF(!aRowCount) || NS_WARN_IF(!aColumnCount)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
*aRowCount = 0;
*aColumnCount = 0;
Element* tableOrElementInTable = aTableOrElementInTable;
if (!tableOrElementInTable) {
tableOrElementInTable =
GetElementOrParentByTagNameAtSelection(*nsGkAtoms::table);
if (NS_WARN_IF(!tableOrElementInTable)) {
return NS_ERROR_FAILURE;
}
}
ErrorResult error;
TableSize tableSize(*this, *tableOrElementInTable, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
*aRowCount = tableSize.mRowCount;
*aColumnCount = tableSize.mColumnCount;
return NS_OK;
}
void HTMLEditor::TableSize::Update(HTMLEditor& aHTMLEditor,
Element& aTableOrElementInTable,
ErrorResult& aRv) {
MOZ_ASSERT(!aRv.Failed());
// Currently, nsTableWrapperFrame::GetRowCount() and
// nsTableWrapperFrame::GetColCount() are safe to use without grabbing
// <table> element. However, editor developers may not watch layout API
// changes. So, for keeping us safer, we should use RefPtr here.
RefPtr<Element> tableElement =
aHTMLEditor.GetElementOrParentByTagNameInternal(*nsGkAtoms::table,
aTableOrElementInTable);
if (NS_WARN_IF(!tableElement)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
nsTableWrapperFrame* tableFrame =
do_QueryFrame(tableElement->GetPrimaryFrame());
if (NS_WARN_IF(!tableFrame)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
mRowCount = tableFrame->GetRowCount();
mColumnCount = tableFrame->GetColCount();
}
NS_IMETHODIMP
HTMLEditor::GetCellDataAt(Element* aTableElement, int32_t aRowIndex,
int32_t aColumnIndex, Element** aCellElement,
int32_t* aStartRowIndex, int32_t* aStartColumnIndex,
int32_t* aRowSpan, int32_t* aColSpan,
int32_t* aEffectiveRowSpan,
int32_t* aEffectiveColSpan, bool* aIsSelected) {
if (NS_WARN_IF(!aCellElement) || NS_WARN_IF(!aStartRowIndex) ||
NS_WARN_IF(!aStartColumnIndex) || NS_WARN_IF(!aRowSpan) ||
NS_WARN_IF(!aColSpan) || NS_WARN_IF(!aEffectiveRowSpan) ||
NS_WARN_IF(!aEffectiveColSpan) || NS_WARN_IF(!aIsSelected)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
*aStartRowIndex = 0;
*aStartColumnIndex = 0;
*aRowSpan = 0;
*aColSpan = 0;
*aEffectiveRowSpan = 0;
*aEffectiveColSpan = 0;
*aIsSelected = false;
*aCellElement = nullptr;
// Let's keep the table element with strong pointer since editor developers
// may not handle layout code of <table>, however, this method depends on
// them.
RefPtr<Element> table = aTableElement;
if (!table) {
// Get the selected table or the table enclosing the selection anchor.
table = GetElementOrParentByTagNameAtSelection(*nsGkAtoms::table);
if (NS_WARN_IF(!table)) {
return NS_ERROR_FAILURE;
}
}
IgnoredErrorResult ignoredError;
CellData cellData(*this, *table, aRowIndex, aColumnIndex, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return NS_ERROR_FAILURE;
}
cellData.mElement.forget(aCellElement);
*aIsSelected = cellData.mIsSelected;
*aStartRowIndex = cellData.mFirst.mRow;
*aStartColumnIndex = cellData.mFirst.mColumn;
*aRowSpan = cellData.mRowSpan;
*aColSpan = cellData.mColSpan;
*aEffectiveRowSpan = cellData.mEffectiveRowSpan;
*aEffectiveColSpan = cellData.mEffectiveColSpan;
return NS_OK;
}
void HTMLEditor::CellData::Update(HTMLEditor& aHTMLEditor,
Element& aTableElement, ErrorResult& aRv) {
MOZ_ASSERT(!aRv.Failed());
mElement = nullptr;
mIsSelected = false;
mFirst.mRow = -1;
mFirst.mColumn = -1;
mRowSpan = -1;
mColSpan = -1;
mEffectiveRowSpan = -1;
mEffectiveColSpan = -1;
nsTableWrapperFrame* tableFrame = HTMLEditor::GetTableFrame(&aTableElement);
if (NS_WARN_IF(!tableFrame)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
// If there is no cell at the indexes. Don't return error.
// XXX If we have pending layout and that causes the cell frame hasn't been
// created, we should return error, but how can we do it?
nsTableCellFrame* cellFrame =
tableFrame->GetCellFrameAt(mCurrent.mRow, mCurrent.mColumn);
if (!cellFrame) {
return;
}
mElement = cellFrame->GetContent()->AsElement();
if (NS_WARN_IF(!mElement)) {
aRv.Throw(NS_ERROR_FAILURE);
return;
}
mIsSelected = cellFrame->IsSelected();
mFirst.mRow = cellFrame->RowIndex();
mFirst.mColumn = cellFrame->ColIndex();
mRowSpan = cellFrame->GetRowSpan();
mColSpan = cellFrame->GetColSpan();
mEffectiveRowSpan =
tableFrame->GetEffectiveRowSpanAt(mCurrent.mRow, mCurrent.mColumn);
mEffectiveColSpan =
tableFrame->GetEffectiveColSpanAt(mCurrent.mRow, mCurrent.mColumn);
}
NS_IMETHODIMP
HTMLEditor::GetCellAt(Element* aTableElement, int32_t aRowIndex,
int32_t aColumnIndex, Element** aCellElement) {
if (NS_WARN_IF(!aCellElement)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
*aCellElement = nullptr;
Element* tableElement = aTableElement;
if (!tableElement) {
// Get the selected table or the table enclosing the selection anchor.
tableElement = GetElementOrParentByTagNameAtSelection(*nsGkAtoms::table);
if (NS_WARN_IF(!tableElement)) {
return NS_ERROR_FAILURE;
}
}
RefPtr<Element> cellElement =
GetTableCellElementAt(*tableElement, aRowIndex, aColumnIndex);
cellElement.forget(aCellElement);
return NS_OK;
}
Element* HTMLEditor::GetTableCellElementAt(Element& aTableElement,
int32_t aRowIndex,
int32_t aColumnIndex) const {
// Let's grab the <table> element while we're retrieving layout API since
// editor developers do not watch all layout API changes. So, it may
// become unsafe.
OwningNonNull<Element> tableElement(aTableElement);
nsTableWrapperFrame* tableFrame = HTMLEditor::GetTableFrame(tableElement);
if (!tableFrame) {
return nullptr;
}
nsIContent* cell = tableFrame->GetCellAt(aRowIndex, aColumnIndex);
return Element::FromNodeOrNull(cell);
}
// When all you want are the rowspan and colspan (not exposed in nsITableEditor)
nsresult HTMLEditor::GetCellSpansAt(Element* aTable, int32_t aRowIndex,
int32_t aColIndex, int32_t& aActualRowSpan,
int32_t& aActualColSpan) {
nsTableWrapperFrame* tableFrame = HTMLEditor::GetTableFrame(aTable);
if (!tableFrame) {
return NS_ERROR_FAILURE;
}
aActualRowSpan = tableFrame->GetEffectiveRowSpanAt(aRowIndex, aColIndex);
aActualColSpan = tableFrame->GetEffectiveColSpanAt(aRowIndex, aColIndex);
return NS_OK;
}
nsresult HTMLEditor::GetCellContext(Element** aTable, Element** aCell,
nsINode** aCellParent, int32_t* aCellOffset,
int32_t* aRowIndex, int32_t* aColumnIndex) {
MOZ_ASSERT(IsEditActionDataAvailable());
// Initialize return pointers
if (aTable) {
*aTable = nullptr;
}
if (aCell) {
*aCell = nullptr;
}
if (aCellParent) {
*aCellParent = nullptr;
}
if (aCellOffset) {
*aCellOffset = 0;
}
if (aRowIndex) {
*aRowIndex = 0;
}
if (aColumnIndex) {
*aColumnIndex = 0;
}
RefPtr<Element> table;
RefPtr<Element> cell;
// Caller may supply the cell...
if (aCell && *aCell) {
cell = *aCell;
}
// ...but if not supplied,
// get cell if it's the child of selection anchor node,
// or get the enclosing by a cell
if (!cell) {
// Find a selected or enclosing table element
ErrorResult error;
RefPtr<Element> cellOrRowOrTableElement =
GetSelectedOrParentTableElement(error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (!cellOrRowOrTableElement) {
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
if (cellOrRowOrTableElement->IsHTMLElement(nsGkAtoms::table)) {
// We have a selected table, not a cell
if (aTable) {
cellOrRowOrTableElement.forget(aTable);
}
return NS_OK;
}
if (!cellOrRowOrTableElement->IsAnyOfHTMLElements(nsGkAtoms::td,
nsGkAtoms::th)) {
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
// We found a cell
cell = std::move(cellOrRowOrTableElement);
}
if (aCell) {
// we don't want to cell.forget() here, because we use it below.
*aCell = do_AddRef(cell).take();
}
// Get containing table
table = GetElementOrParentByTagNameInternal(*nsGkAtoms::table, *cell);
if (NS_WARN_IF(!table)) {
// Cell must be in a table, so fail if not found
return NS_ERROR_FAILURE;
}
if (aTable) {
table.forget(aTable);
}
// Get the rest of the related data only if requested
if (aRowIndex || aColumnIndex) {
ErrorResult error;
CellIndexes cellIndexes(*cell, error);
if (NS_WARN_IF(error.Failed())) {
return error.StealNSResult();
}
if (aRowIndex) {
*aRowIndex = cellIndexes.mRow;
}
if (aColumnIndex) {
*aColumnIndex = cellIndexes.mColumn;
}
}
if (aCellParent) {
// Get the immediate parent of the cell
nsCOMPtr<nsINode> cellParent = cell->GetParentNode();
// Cell has to have a parent, so fail if not found
NS_ENSURE_TRUE(cellParent, NS_ERROR_FAILURE);
if (aCellOffset) {
*aCellOffset = GetChildOffset(cell, cellParent);
}
// Now it's safe to hand over the reference to cellParent, since
// we don't need it anymore.
cellParent.forget(aCellParent);
}
return NS_OK;
}
// static
nsresult HTMLEditor::GetCellFromRange(nsRange* aRange, Element** aCell) {
// Note: this might return a node that is outside of the range.
// Use carefully.
NS_ENSURE_TRUE(aRange && aCell, NS_ERROR_NULL_POINTER);
*aCell = nullptr;
nsCOMPtr<nsINode> startContainer = aRange->GetStartContainer();
if (NS_WARN_IF(!startContainer)) {
return NS_ERROR_FAILURE;
}
uint32_t startOffset = aRange->StartOffset();
nsCOMPtr<nsINode> childNode = aRange->GetChildAtStartOffset();
// This means selection is probably at a text node (or end of doc?)
if (!childNode) {
return NS_ERROR_FAILURE;
}
nsCOMPtr<nsINode> endContainer = aRange->GetEndContainer();
if (NS_WARN_IF(!endContainer)) {
return NS_ERROR_FAILURE;
}
// If a cell is deleted, the range is collapse
// (startOffset == aRange->EndOffset())
// so tell caller the cell wasn't found
if (startContainer == endContainer &&
aRange->EndOffset() == startOffset + 1 &&
HTMLEditUtils::IsTableCell(childNode)) {
// Should we also test if frame is selected? (Use CellData)
// (Let's not for now -- more efficient)
RefPtr<Element> cellElement = childNode->AsElement();
cellElement.forget(aCell);
return NS_OK;
}
return NS_SUCCESS_EDITOR_ELEMENT_NOT_FOUND;
}
NS_IMETHODIMP
HTMLEditor::GetFirstSelectedCell(nsRange** aFirstSelectedRange,
Element** aFirstSelectedCellElement) {
if (NS_WARN_IF(!aFirstSelectedCellElement)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
*aFirstSelectedCellElement = nullptr;
if (aFirstSelectedRange) {
*aFirstSelectedRange = nullptr;
}
ErrorResult error;
RefPtr<Element> firstSelectedCellElement =
GetFirstSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
if (!firstSelectedCellElement) {
// Just not found. Don't return error.
return NS_OK;
}
firstSelectedCellElement.forget(aFirstSelectedCellElement);
if (aFirstSelectedRange) {
// Returns the first range only when the caller requested the range.
RefPtr<nsRange> firstRange = SelectionRefPtr()->GetRangeAt(0);
MOZ_ASSERT(firstRange);
firstRange.forget(aFirstSelectedRange);
}
return NS_OK;
}
already_AddRefed<Element> HTMLEditor::GetFirstSelectedTableCellElement(
ErrorResult& aRv) const {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!aRv.Failed());
nsRange* firstRange = SelectionRefPtr()->GetRangeAt(0);
if (NS_WARN_IF(!firstRange)) {
// XXX Why don't we treat "not found" in this case?
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
// XXX It must be unclear when this is reset...
mSelectedCellIndex = 0;
RefPtr<Element> selectedCell;
nsresult rv =
HTMLEditor::GetCellFromRange(firstRange, getter_AddRefs(selectedCell));
if (NS_FAILED(rv)) {
// This case occurs only when Selection is in a text node in normal cases.
return nullptr;
}
if (!selectedCell) {
// This case means that the range does not select only a cell.
// E.g., selects non-table cell element, selects two or more cells, or
// does not select any cell element.
return nullptr;
}
// Setup for GetNextSelectedTableCellElement()
// XXX Oh, increment it now? Rather than when
// GetNextSelectedTableCellElement() is called?
mSelectedCellIndex = 1;
return selectedCell.forget();
}
NS_IMETHODIMP
HTMLEditor::GetNextSelectedCell(nsRange** aNextSelectedCellRange,
Element** aNextSelectedCellElement) {
if (NS_WARN_IF(!aNextSelectedCellElement)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
*aNextSelectedCellElement = nullptr;
if (aNextSelectedCellRange) {
*aNextSelectedCellRange = nullptr;
}
ErrorResult error;
RefPtr<Element> nextSelectedCellElement =
GetNextSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
if (!nextSelectedCellElement) {
// not more range, or met a range which does not select <td> nor <th>.
return NS_OK;
}
if (aNextSelectedCellRange) {
MOZ_ASSERT(mSelectedCellIndex > 0);
*aNextSelectedCellRange =
do_AddRef(SelectionRefPtr()->GetRangeAt(mSelectedCellIndex - 1)).take();
}
nextSelectedCellElement.forget(aNextSelectedCellElement);
return NS_OK;
}
already_AddRefed<Element> HTMLEditor::GetNextSelectedTableCellElement(
ErrorResult& aRv) const {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!aRv.Failed());
if (mSelectedCellIndex >= SelectionRefPtr()->RangeCount()) {
// We've already returned all selected cells.
return nullptr;
}
MOZ_ASSERT(mSelectedCellIndex > 0);
for (; mSelectedCellIndex < SelectionRefPtr()->RangeCount();
mSelectedCellIndex++) {
nsRange* range = SelectionRefPtr()->GetRangeAt(mSelectedCellIndex);
if (NS_WARN_IF(!range)) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
RefPtr<Element> nextSelectedCellElement;
nsresult rv = HTMLEditor::GetCellFromRange(
range, getter_AddRefs(nextSelectedCellElement));
if (NS_FAILED(rv)) {
// Failure means that the range is in non-element node, e.g., a text node.
// Returns nullptr without error if not found.
// XXX Why don't we just skip such range or incrementing
// mSelectedCellIndex for next call?
return nullptr;
}
if (nextSelectedCellElement) {
mSelectedCellIndex++;
return nextSelectedCellElement.forget();
}
}
// Returns nullptr without error if not found.
return nullptr;
}
NS_IMETHODIMP
HTMLEditor::GetFirstSelectedCellInTable(int32_t* aRowIndex,
int32_t* aColumnIndex,
Element** aCellElement) {
if (NS_WARN_IF(!aRowIndex) || NS_WARN_IF(!aColumnIndex) ||
NS_WARN_IF(!aCellElement)) {
return NS_ERROR_INVALID_ARG;
}
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
*aRowIndex = 0;
*aColumnIndex = 0;
*aCellElement = nullptr;
ErrorResult error;
CellAndIndexes result(*this, *SelectionRefPtr(), error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
result.mElement.forget(aCellElement);
*aRowIndex = std::max(result.mIndexes.mRow, 0);
*aColumnIndex = std::max(result.mIndexes.mColumn, 0);
return NS_OK;
}
void HTMLEditor::CellAndIndexes::Update(HTMLEditor& aHTMLEditor,
Selection& aSelection,
ErrorResult& aRv) {
MOZ_ASSERT(!aRv.Failed());
mIndexes.mRow = -1;
mIndexes.mColumn = -1;
mElement = aHTMLEditor.GetFirstSelectedTableCellElement(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return;
}
if (!mElement) {
return;
}
mIndexes.Update(*mElement, aRv);
NS_WARNING_ASSERTION(
!aRv.Failed(),
"Selected element is found, but failed to compute its indexes");
}
void HTMLEditor::SetSelectionAfterTableEdit(Element* aTable, int32_t aRow,
int32_t aCol, int32_t aDirection,
bool aSelected) {
MOZ_ASSERT(IsEditActionDataAvailable());
if (NS_WARN_IF(!aTable) || Destroyed()) {
return;
}
RefPtr<Element> cell;
bool done = false;
do {
cell = GetTableCellElementAt(*aTable, aRow, aCol);
if (cell) {
if (aSelected) {
// Reselect the cell
DebugOnly<nsresult> rv = SelectContentInternal(*cell);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv), "Failed to select the cell");
return;
}
// Set the caret to deepest first child
// but don't go into nested tables
// TODO: Should we really be placing the caret at the END
// of the cell content?
CollapseSelectionToDeepestNonTableFirstChild(cell);
return;
}
// Setup index to find another cell in the
// direction requested, but move in other direction if already at
// beginning of row or column
switch (aDirection) {
case ePreviousColumn:
if (!aCol) {
if (aRow > 0) {
aRow--;
} else {
done = true;
}
} else {
aCol--;
}
break;
case ePreviousRow:
if (!aRow) {
if (aCol > 0) {
aCol--;
} else {
done = true;
}
} else {
aRow--;
}
break;
default:
done = true;
}
} while (!done);
// We didn't find a cell
// Set selection to just before the table
if (aTable->GetParentNode()) {
EditorRawDOMPoint atTable(aTable);
if (NS_WARN_IF(!atTable.IsSetAndValid())) {
return;
}
DebugOnly<nsresult> rv = SelectionRefPtr()->Collapse(atTable);
NS_WARNING_ASSERTION(NS_SUCCEEDED(rv),
"Failed to collapse Selection at the table");
return;
}
// Last resort: Set selection to start of doc
// (it's very bad to not have a valid selection!)
SetSelectionAtDocumentStart();
}
NS_IMETHODIMP
HTMLEditor::GetSelectedOrParentTableElement(
nsAString& aTagName, int32_t* aSelectedCount,
Element** aCellOrRowOrTableElement) {
if (NS_WARN_IF(!aSelectedCount) || NS_WARN_IF(!aCellOrRowOrTableElement)) {
return NS_ERROR_INVALID_ARG;
}
aTagName.Truncate();
*aCellOrRowOrTableElement = nullptr;
*aSelectedCount = 0;
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
bool isCellSelected = false;
ErrorResult aRv;
RefPtr<Element> cellOrRowOrTableElement =
GetSelectedOrParentTableElement(aRv, &isCellSelected);
if (NS_WARN_IF(aRv.Failed())) {
return EditorBase::ToGenericNSResult(aRv.StealNSResult());
}
if (!cellOrRowOrTableElement) {
return NS_OK;
}
if (isCellSelected) {
aTagName.AssignLiteral("td");
*aSelectedCount = SelectionRefPtr()->RangeCount();
cellOrRowOrTableElement.forget(aCellOrRowOrTableElement);
return NS_OK;
}
if (cellOrRowOrTableElement->IsAnyOfHTMLElements(nsGkAtoms::td,
nsGkAtoms::th)) {
aTagName.AssignLiteral("td");
// Keep *aSelectedCount as 0.
cellOrRowOrTableElement.forget(aCellOrRowOrTableElement);
return NS_OK;
}
if (cellOrRowOrTableElement->IsHTMLElement(nsGkAtoms::table)) {
aTagName.AssignLiteral("table");
*aSelectedCount = 1;
cellOrRowOrTableElement.forget(aCellOrRowOrTableElement);
return NS_OK;
}
if (cellOrRowOrTableElement->IsHTMLElement(nsGkAtoms::tr)) {
aTagName.AssignLiteral("tr");
*aSelectedCount = 1;
cellOrRowOrTableElement.forget(aCellOrRowOrTableElement);
return NS_OK;
}
MOZ_ASSERT_UNREACHABLE("Which element was returned?");
return NS_ERROR_UNEXPECTED;
}
already_AddRefed<Element> HTMLEditor::GetSelectedOrParentTableElement(
ErrorResult& aRv, bool* aIsCellSelected /* = nullptr */) const {
MOZ_ASSERT(IsEditActionDataAvailable());
MOZ_ASSERT(!aRv.Failed());
if (aIsCellSelected) {
*aIsCellSelected = false;
}
// Try to get the first selected cell, first.
RefPtr<Element> cellElement = GetFirstSelectedTableCellElement(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
if (cellElement) {
if (aIsCellSelected) {
*aIsCellSelected = true;
}
return cellElement.forget();
}
const RangeBoundary& anchorRef = SelectionRefPtr()->AnchorRef();
if (NS_WARN_IF(!anchorRef.IsSet())) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
// If anchor selects a <td>, <table> or <tr>, return it.
if (anchorRef.Container()->HasChildNodes()) {
nsIContent* selectedContent = anchorRef.GetChildAtOffset();
if (selectedContent) {
// XXX Why do we ignore <th> element in this case?
if (selectedContent->IsHTMLElement(nsGkAtoms::td)) {
// FYI: If first range selects a <tr> element, but the other selects
// a <td> element, you can reach here.
// Each cell is in its own selection range in this case.
// XXX Although, other ranges may not select cells, though.
if (aIsCellSelected) {
*aIsCellSelected = true;
}
return do_AddRef(selectedContent->AsElement());
}
if (selectedContent->IsAnyOfHTMLElements(nsGkAtoms::table,
nsGkAtoms::tr)) {
return do_AddRef(selectedContent->AsElement());
}
}
}
// Then, look for a cell element (either <td> or <th>) which contains
// the anchor container.
cellElement = GetElementOrParentByTagNameInternal(*nsGkAtoms::td,
*anchorRef.Container());
if (!cellElement) {
return nullptr; // Not in table.
}
// Don't set *aIsCellSelected to true in this case because it does NOT
// select a cell, just in a cell.
return cellElement.forget();
}
NS_IMETHODIMP
HTMLEditor::GetSelectedCellsType(Element* aElement, uint32_t* aSelectionType) {
NS_ENSURE_ARG_POINTER(aSelectionType);
*aSelectionType = 0;
AutoEditActionDataSetter editActionData(*this, EditAction::eNotEditing);
if (NS_WARN_IF(!editActionData.CanHandle())) {
return NS_ERROR_NOT_INITIALIZED;
}
// Be sure we have a table element
// (if aElement is null, this uses selection's anchor node)
RefPtr<Element> table;
if (aElement) {
table = GetElementOrParentByTagNameInternal(*nsGkAtoms::table, *aElement);
if (NS_WARN_IF(!table)) {
return NS_ERROR_FAILURE;
}
} else {
table = GetElementOrParentByTagNameAtSelection(*nsGkAtoms::table);
if (NS_WARN_IF(!table)) {
return NS_ERROR_FAILURE;
}
}
ErrorResult error;
TableSize tableSize(*this, *table, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
// Traverse all selected cells
RefPtr<Element> selectedCell = GetFirstSelectedTableCellElement(error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
if (!selectedCell) {
return NS_OK;
}
// We have at least one selected cell, so set return value
*aSelectionType = static_cast<uint32_t>(TableSelection::Cell);
// Store indexes of each row/col to avoid duplication of searches
nsTArray<int32_t> indexArray;
bool allCellsInRowAreSelected = false;
bool allCellsInColAreSelected = false;
IgnoredErrorResult ignoredError;
while (selectedCell) {
CellIndexes selectedCellIndexes(*selectedCell, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
if (!indexArray.Contains(selectedCellIndexes.mColumn)) {
indexArray.AppendElement(selectedCellIndexes.mColumn);
allCellsInRowAreSelected = AllCellsInRowSelected(
table, selectedCellIndexes.mRow, tableSize.mColumnCount);
// We're done as soon as we fail for any row
if (!allCellsInRowAreSelected) {
break;
}
}
selectedCell = GetNextSelectedTableCellElement(ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"Failed to get next selected table cell element");
}
if (allCellsInRowAreSelected) {
*aSelectionType = static_cast<uint32_t>(TableSelection::Row);
return NS_OK;
}
// Test for columns
// Empty the indexArray
indexArray.Clear();
// Start at first cell again
selectedCell = GetFirstSelectedTableCellElement(ignoredError);
while (selectedCell) {
CellIndexes selectedCellIndexes(*selectedCell, error);
if (NS_WARN_IF(error.Failed())) {
return EditorBase::ToGenericNSResult(error.StealNSResult());
}
if (!indexArray.Contains(selectedCellIndexes.mRow)) {
indexArray.AppendElement(selectedCellIndexes.mColumn);
allCellsInColAreSelected = AllCellsInColumnSelected(
table, selectedCellIndexes.mColumn, tableSize.mRowCount);
// We're done as soon as we fail for any column
if (!allCellsInRowAreSelected) {
break;
}
}
selectedCell = GetNextSelectedTableCellElement(ignoredError);
NS_WARNING_ASSERTION(!ignoredError.Failed(),
"Failed to get next selected table cell element");
}
if (allCellsInColAreSelected) {
*aSelectionType = static_cast<uint32_t>(TableSelection::Column);
}
return NS_OK;
}
bool HTMLEditor::AllCellsInRowSelected(Element* aTable, int32_t aRowIndex,
int32_t aNumberOfColumns) {
if (NS_WARN_IF(!aTable)) {
return false;
}
IgnoredErrorResult ignoredError;
CellData cellData;
for (int32_t col = 0; col < aNumberOfColumns;
col = cellData.NextColumnIndex()) {
cellData.Update(*this, *aTable, aRowIndex, col, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return false;
}
// If no cell, we may have a "ragged" right edge, so return TRUE only if
// we already found a cell in the row.
// XXX So, this does not assume that CellData returns error when just
// not found a cell. Fix this later.
if (NS_WARN_IF(!cellData.mElement)) {
return cellData.mCurrent.mColumn > 0;
}
// Return as soon as a non-selected cell is found.
// XXX Odd, this is testing if each cell element is selected. Why do
// we need to warn if it's false??
if (NS_WARN_IF(!cellData.mIsSelected)) {
return false;
}
MOZ_ASSERT(col < cellData.NextColumnIndex());
}
return true;
}
bool HTMLEditor::AllCellsInColumnSelected(Element* aTable, int32_t aColIndex,
int32_t aNumberOfRows) {
if (NS_WARN_IF(!aTable)) {
return false;
}
IgnoredErrorResult ignoredError;
CellData cellData;
for (int32_t row = 0; row < aNumberOfRows; row = cellData.NextRowIndex()) {
cellData.Update(*this, *aTable, row, aColIndex, ignoredError);
if (NS_WARN_IF(cellData.FailedOrNotFound())) {
return false;
}
// If no cell, we must have a "ragged" right edge on the last column so
// return TRUE only if we already found a cell in the row.
// XXX So, this does not assume that CellData returns error when just
// not found a cell. Fix this later.
if (NS_WARN_IF(!cellData.mElement)) {
return cellData.mCurrent.mRow > 0;
}
// Return as soon as a non-selected cell is found.
// XXX Odd, this is testing if each cell element is selected. Why do
// we need to warn if it's false??
if (NS_WARN_IF(!cellData.mIsSelected)) {
return false;
}
MOZ_ASSERT(row < cellData.NextRowIndex());
}
return true;
}
bool HTMLEditor::IsEmptyCell(dom::Element* aCell) {
MOZ_ASSERT(aCell);
// Check if target only contains empty text node or <br>
nsCOMPtr<nsINode> cellChild = aCell->GetFirstChild();
if (!cellChild) {
return false;
}
nsCOMPtr<nsINode> nextChild = cellChild->GetNextSibling();
if (nextChild) {
return false;
}
// We insert a single break into a cell by default
// to have some place to locate a cursor -- it is dispensable
if (cellChild->IsHTMLElement(nsGkAtoms::br)) {
return true;
}
bool isEmpty;
// Or check if no real content
nsresult rv = IsEmptyNode(cellChild, &isEmpty, false, false);
NS_ENSURE_SUCCESS(rv, false);
return isEmpty;
}
} // namespace mozilla
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