/// <summary>
/// Merges two naighboring lists ending and starting at position mergePosition
/// </summary>
/// <param name="mergePosition">
/// Position at with two List elements are expected to appear next to each other
/// </param>
/// <returns>
/// true if there were two mergeable List elements and merge happened.
/// false if there is no pair of List elements at the mergePosition.
/// </returns>
internal static bool MergeLists(TextPointer mergePosition)
{
if (mergePosition.GetPointerContext(LogicalDirection.Backward) != TextPointerContext.ElementEnd ||
mergePosition.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.ElementStart)
{
return(false);
}
List precedingList = mergePosition.GetAdjacentElement(LogicalDirection.Backward) as List;
List followingList = mergePosition.GetAdjacentElement(LogicalDirection.Forward) as List;
if (precedingList == null || followingList == null)
{
return(false);
}
precedingList.Reposition(precedingList.ContentStart, followingList.ElementEnd);
followingList.Reposition(null, null);
// We need to set appropriate FlowDirection property on the new List and its paragraph children.
// We take the FlowDirection value from the preceding list.
TextRangeEdit.SetParagraphProperty(precedingList.ElementStart, precedingList.ElementEnd,
Paragraph.FlowDirectionProperty, precedingList.GetValue(Paragraph.FlowDirectionProperty));
return(true);
}
// Assumes that a range contains a sequence of same-level ListItems.
// Converts all these ListItems into Paragraphs and
// either adds them to preceding ListItem (as non-bulleted continuation)
// or pulls them out of a List if they start in the beginning of a List
internal static void ConvertListItemsToParagraphs(TextRange range)
{
ListItem firstListItem = TextPointerBase.GetListItem(range.Start);
ListItem lastListItem = TextPointerBase.GetListItem((TextPointer)TextRangeEdit.GetAdjustedRangeEnd(range.Start, range.End));
// The range must be in a sequence of ListItems belonging to one List wrapper
if (firstListItem == null || lastListItem == null || firstListItem.Parent != lastListItem.Parent || !(firstListItem.Parent is List))
{
return;
}
List listToRemove = null;
ListItem leadingListItem = firstListItem.PreviousListItem;
if (leadingListItem != null)
{
// We have a leading ListItem, so pull selected items into it
leadingListItem.Reposition(leadingListItem.ContentStart, lastListItem.ElementEnd);
}
else
{
// We do not have a leading ListItem. So pull selected items out of a list
// Cut wrapping list after endListItem
if (lastListItem.NextListItem != null)
{
TextRangeEdit.SplitElement(lastListItem.ElementEnd);
}
// Set list to remove
listToRemove = firstListItem.List;
}
// Remove ListItems from all selected blocks
ListItem listItem = firstListItem;
while (listItem != null)
{
ListItem nextListItem = listItem.ElementEnd.GetAdjacentElement(LogicalDirection.Forward) as ListItem;
// If this is an empty <ListItem></ListItem>, insert an explicit paragraph in it before deleting the list item.
if (listItem.ContentStart.CompareTo(listItem.ContentEnd) == 0)
{
TextRangeEditTables.EnsureInsertionPosition(listItem.ContentStart);
}
listItem.Reposition(null, null);
listItem = listItem == lastListItem ? null : nextListItem;
}
// If we have a list to remove, remove it and set its FlowDirection to its children
if (listToRemove != null)
{
FlowDirection flowDirection = (FlowDirection)listToRemove.GetValue(Paragraph.FlowDirectionProperty);
listToRemove.Reposition(null, null);
TextRangeEdit.SetParagraphProperty(range.Start, range.End, Paragraph.FlowDirectionProperty, flowDirection);
}
}
private static void DecreaseIndentation(TextSelection thisSelection, ListItem parentListItem, ListItem immediateListItem)
{
if (immediateListItem != null)
{
TextRangeEditLists.UnindentListItems(thisSelection);
}
else if (parentListItem != null)
{
TextRangeEditLists.ConvertParagraphsToListItems(thisSelection, TextMarkerStyle.Disc);
TextRangeEditLists.UnindentListItems(thisSelection);
}
else
{
if (thisSelection.IsEmpty)
{
// When selection is empty, handle indentation based on current TextIndent property of the paragraph.
Block paragraphOrBlockUIContainer = thisSelection.Start.ParagraphOrBlockUIContainer;
if (paragraphOrBlockUIContainer is BlockUIContainer)
{
// Decrement BlockUIContainer's leading margin.
TextRangeEdit.IncrementParagraphLeadingMargin(thisSelection, /*increment:*/ 20, PropertyValueAction.DecreaseByAbsoluteValue);
}
else
{
// Create implicit paragraph if at a potential paragraph position, such as empty FlowDocument, TableCell.
CreateImplicitParagraphIfNeededAndUpdateSelection(thisSelection);
Paragraph paragraph = thisSelection.Start.Paragraph;
Invariant.Assert(paragraph != null, "EnsureInsertionPosition must guarantee a position in text content");
// When selection is empty, handle indentation based on current TextIndent property of the paragraph.
if (paragraph.TextIndent > 20)
{
// Reset text indent to 20.
TextRangeEdit.SetParagraphProperty(thisSelection.Start, thisSelection.End, Paragraph.TextIndentProperty, 20.0, PropertyValueAction.SetValue);
}
else if (paragraph.TextIndent > 0)
{
// Reset text indent to 0.
TextRangeEdit.SetParagraphProperty(thisSelection.Start, thisSelection.End, Paragraph.TextIndentProperty, 0.0, PropertyValueAction.SetValue);
}
else
{
// Decrement paragraph leading margin.
TextRangeEdit.IncrementParagraphLeadingMargin(thisSelection, /*increment:*/ 20, PropertyValueAction.DecreaseByAbsoluteValue);
}
}
}
else
{
// For non-empty selection, always decrement paragraph margin.
TextRangeEdit.IncrementParagraphLeadingMargin(thisSelection, /*increment:*/ 20, PropertyValueAction.DecreaseByAbsoluteValue);
}
}
}
// Token: 0x06003B80 RID: 15232 RVA: 0x0010EE34 File Offset: 0x0010D034
internal static bool MergeLists(TextPointer mergePosition)
{
if (mergePosition.GetPointerContext(LogicalDirection.Backward) != TextPointerContext.ElementEnd || mergePosition.GetPointerContext(LogicalDirection.Forward) != TextPointerContext.ElementStart)
{
return(false);
}
List list = mergePosition.GetAdjacentElement(LogicalDirection.Backward) as List;
List list2 = mergePosition.GetAdjacentElement(LogicalDirection.Forward) as List;
if (list == null || list2 == null)
{
return(false);
}
list.Reposition(list.ContentStart, list2.ElementEnd);
list2.Reposition(null, null);
TextRangeEdit.SetParagraphProperty(list.ElementStart, list.ElementEnd, Block.FlowDirectionProperty, list.GetValue(Block.FlowDirectionProperty));
return(true);
}
// Token: 0x060031BA RID: 12730 RVA: 0x000DBC04 File Offset: 0x000D9E04
internal void Apply(Block firstBlock, Block lastBlock)
{
Invariant.Assert(base.Parent == null, "Cannot Apply List Because It Is Inserted In The Tree Already.");
Invariant.Assert(base.IsEmpty, "Cannot Apply List Because It Is Not Empty.");
Invariant.Assert(firstBlock.Parent == lastBlock.Parent, "Cannot Apply List Because Block Are Not Siblings.");
TextContainer textContainer = base.TextContainer;
textContainer.BeginChange();
try
{
base.Reposition(firstBlock.ElementStart, lastBlock.ElementEnd);
ListItem listItem;
for (Block block = firstBlock; block != null; block = ((block == lastBlock) ? null : ((Block)listItem.ElementEnd.GetAdjacentElement(LogicalDirection.Forward))))
{
if (block is List)
{
listItem = (block.ElementStart.GetAdjacentElement(LogicalDirection.Backward) as ListItem);
if (listItem != null)
{
listItem.Reposition(listItem.ContentStart, block.ElementEnd);
}
else
{
listItem = new ListItem();
listItem.Reposition(block.ElementStart, block.ElementEnd);
}
}
else
{
listItem = new ListItem();
listItem.Reposition(block.ElementStart, block.ElementEnd);
block.ClearValue(Block.MarginProperty);
block.ClearValue(Block.PaddingProperty);
block.ClearValue(Paragraph.TextIndentProperty);
}
}
TextRangeEdit.SetParagraphProperty(base.ElementStart, base.ElementEnd, Block.FlowDirectionProperty, firstBlock.GetValue(Block.FlowDirectionProperty));
}
finally
{
textContainer.EndChange();
}
}
// Token: 0x06003B83 RID: 15235 RVA: 0x0010F058 File Offset: 0x0010D258
internal static void ConvertListItemsToParagraphs(TextRange range)
{
ListItem listItem = TextPointerBase.GetListItem(range.Start);
ListItem listItem2 = TextPointerBase.GetListItem((TextPointer)TextRangeEdit.GetAdjustedRangeEnd(range.Start, range.End));
if (listItem == null || listItem2 == null || listItem.Parent != listItem2.Parent || !(listItem.Parent is List))
{
return;
}
List list = null;
ListItem previousListItem = listItem.PreviousListItem;
if (previousListItem != null)
{
previousListItem.Reposition(previousListItem.ContentStart, listItem2.ElementEnd);
}
else
{
if (listItem2.NextListItem != null)
{
TextRangeEdit.SplitElement(listItem2.ElementEnd);
}
list = listItem.List;
}
ListItem listItem4;
for (ListItem listItem3 = listItem; listItem3 != null; listItem3 = ((listItem3 == listItem2) ? null : listItem4))
{
listItem4 = (listItem3.ElementEnd.GetAdjacentElement(LogicalDirection.Forward) as ListItem);
if (listItem3.ContentStart.CompareTo(listItem3.ContentEnd) == 0)
{
TextRangeEditTables.EnsureInsertionPosition(listItem3.ContentStart);
}
listItem3.Reposition(null, null);
}
if (list != null)
{
FlowDirection flowDirection = (FlowDirection)list.GetValue(Block.FlowDirectionProperty);
list.Reposition(null, null);
TextRangeEdit.SetParagraphProperty(range.Start, range.End, Block.FlowDirectionProperty, flowDirection);
}
}
// Token: 0x06003878 RID: 14456 RVA: 0x000FCFC8 File Offset: 0x000FB1C8
private static void DecreaseIndentation(TextSelection thisSelection, ListItem parentListItem, ListItem immediateListItem)
{
if (immediateListItem != null)
{
TextRangeEditLists.UnindentListItems(thisSelection);
return;
}
if (parentListItem != null)
{
TextRangeEditLists.ConvertParagraphsToListItems(thisSelection, TextMarkerStyle.Disc);
TextRangeEditLists.UnindentListItems(thisSelection);
return;
}
if (!thisSelection.IsEmpty)
{
TextRangeEdit.IncrementParagraphLeadingMargin(thisSelection, 20.0, PropertyValueAction.DecreaseByAbsoluteValue);
return;
}
Block paragraphOrBlockUIContainer = thisSelection.Start.ParagraphOrBlockUIContainer;
if (paragraphOrBlockUIContainer is BlockUIContainer)
{
TextRangeEdit.IncrementParagraphLeadingMargin(thisSelection, 20.0, PropertyValueAction.DecreaseByAbsoluteValue);
return;
}
TextEditorLists.CreateImplicitParagraphIfNeededAndUpdateSelection(thisSelection);
Paragraph paragraph = thisSelection.Start.Paragraph;
Invariant.Assert(paragraph != null, "EnsureInsertionPosition must guarantee a position in text content");
if (paragraph.TextIndent > 20.0)
{
TextRangeEdit.SetParagraphProperty(thisSelection.Start, thisSelection.End, Paragraph.TextIndentProperty, 20.0, PropertyValueAction.SetValue);
return;
}
if (paragraph.TextIndent > 0.0)
{
TextRangeEdit.SetParagraphProperty(thisSelection.Start, thisSelection.End, Paragraph.TextIndentProperty, 0.0, PropertyValueAction.SetValue);
return;
}
TextRangeEdit.IncrementParagraphLeadingMargin(thisSelection, 20.0, PropertyValueAction.DecreaseByAbsoluteValue);
}
// Token: 0x06003AFE RID: 15102 RVA: 0x0010A744 File Offset: 0x00108944
internal virtual void ApplyPropertyToTextVirtual(DependencyProperty formattingProperty, object value, bool applyToParagraphs, PropertyValueAction propertyValueAction)
{
TextRangeBase.BeginChange(this);
try
{
for (int i = 0; i < this._textSegments.Count; i++)
{
TextSegment textSegment = this._textSegments[i];
if (formattingProperty == FrameworkElement.FlowDirectionProperty)
{
if (applyToParagraphs || this.IsEmpty || TextRangeBase.IsParagraphBoundaryCrossed(this))
{
TextRangeEdit.SetParagraphProperty((TextPointer)textSegment.Start, (TextPointer)textSegment.End, formattingProperty, value, propertyValueAction);
}
else
{
TextRangeEdit.SetInlineProperty((TextPointer)textSegment.Start, (TextPointer)textSegment.End, formattingProperty, value, propertyValueAction);
}
}
else if (TextSchema.IsCharacterProperty(formattingProperty))
{
TextRangeEdit.SetInlineProperty((TextPointer)textSegment.Start, (TextPointer)textSegment.End, formattingProperty, value, propertyValueAction);
}
else if (TextSchema.IsParagraphProperty(formattingProperty))
{
if (formattingProperty.PropertyType == typeof(Thickness) && (FlowDirection)textSegment.Start.GetValue(Block.FlowDirectionProperty) == FlowDirection.RightToLeft)
{
value = new Thickness(((Thickness)value).Right, ((Thickness)value).Top, ((Thickness)value).Left, ((Thickness)value).Bottom);
}
TextRangeEdit.SetParagraphProperty((TextPointer)textSegment.Start, (TextPointer)textSegment.End, formattingProperty, value, propertyValueAction);
}
}
}
finally
{
TextRangeBase.EndChange(this);
}
}
internal static bool UnindentListItems(TextRange range)
{
// If listitems in this range cross a list boundary, we cannot unindent them.
if (!IsRangeWithinSingleList(range))
{
return(false);
}
ListItem firstListItem = TextPointerBase.GetListItem(range.Start);
ListItem lastListItem = TextPointerBase.GetListItem((TextPointer)TextRangeEdit.GetAdjustedRangeEnd(range.Start, range.End));
// At this point it is possible that lastListItem is a child of
// firstListItem.
//
// This is due to a special case in IsRangeWithinSingleList
// which allows the input TextRange to cross List boundaries only
// in the case where the TextRange ends adjacent to an insertion
// position at the same level as the start, e.g.:
//
// - parent item
// - start item (range starts here)
// - child item (range ends here)
// <start item must not have any siblings>
//
// Here we check for that special case and ensure that
// lastListItem is at the same level as firstListItem.
TextElement parent = (TextElement)lastListItem.Parent;
while (parent != firstListItem.Parent)
{
lastListItem = parent as ListItem;
parent = (TextElement)parent.Parent;
}
if (lastListItem == null)
{
// This can happen if the input is a fragment, a collection
// of ListItems not parented by an outer List.
return(false);
}
// Cut wrapping list before startListItem
if (firstListItem.PreviousListItem != null)
{
TextRangeEdit.SplitElement(firstListItem.ElementStart);
}
// Cut wrapping list after endListItem
if (lastListItem.NextListItem != null)
{
TextRangeEdit.SplitElement(lastListItem.ElementEnd);
}
// Remove List wrapper from selected items
List unindentedList = (List)firstListItem.Parent;
// Check whether we have outer ListItem
ListItem outerListItem = unindentedList.Parent as ListItem;
if (outerListItem != null)
{
// Selected items belong to a nested list.
// So we need to pull them to the level of enclosing ListItem, i.e. cut this ListItem.
// In this case we also need to include trailing list into the last of selected items
// Remove a wrapping List from selected items
unindentedList.Reposition(null, null);
// Remember end position of outerListItem to pull any trailing list or other blocks into the last of selected listitems
TextPointer outerListItemEnd = outerListItem.ContentEnd;
if (outerListItem.ContentStart.CompareTo(firstListItem.ElementStart) == 0)
{
// There is nothing before first list item; so outer list item would be empty - just delete it
outerListItem.Reposition(null, null);
}
else
{
// Wrap all stuff preceding firstListItem in outerListItem
outerListItem.Reposition(outerListItem.ContentStart, firstListItem.ElementStart);
}
if (outerListItemEnd.CompareTo(lastListItem.ElementEnd) == 0)
{
// There are no following siblings to pull into last selected item; do nothing.
}
else
{
// Pull trailing items (following siblings to the selected ones) into the last selected item
// Remember a position to merge any trailing list after lastListItem
TextPointer mergePosition = lastListItem.ContentEnd;
// Reposition last selectd ListItem so that it includes trailing list (or other block) as its children
lastListItem.Reposition(lastListItem.ContentStart, outerListItemEnd);
// Merge any trailing list with a sublist outdented with our listitem
MergeLists(mergePosition);
}
}
else
{
// Selected items are not in nested list.
// We need to simply unwrap them and convert to paragraphs
TextPointer start = unindentedList.ElementStart;
TextPointer end = unindentedList.ElementEnd;
// Save the list's FlowDirection value, to apply later to its children.
object listFlowDirectionValue = unindentedList.GetValue(Paragraph.FlowDirectionProperty);
// Remove a wrapping List from selected items
unindentedList.Reposition(null, null);
// Remove ListItems from all selected items
ListItem listItem = firstListItem;
while (listItem != null)
{
ListItem nextListItem = listItem.ElementEnd.GetAdjacentElement(LogicalDirection.Forward) as ListItem;
// If this is an empty <ListItem></ListItem>, insert an explicit paragraph in it before deleting the list item.
if (listItem.ContentStart.CompareTo(listItem.ContentEnd) == 0)
{
TextRangeEditTables.EnsureInsertionPosition(listItem.ContentStart);
}
listItem.Reposition(null, null);
listItem = listItem == lastListItem ? null : nextListItem;
}
// Apply FlowDirection of the list just deleted to all its children.
TextRangeEdit.SetParagraphProperty(start, end, Paragraph.FlowDirectionProperty, listFlowDirectionValue);
// Merge lists on boundaries
MergeLists(start);
MergeLists(end);
}
return(true);
}
/// <summary>
/// Inserts a List around a sequence of Blocks
/// starting from firstBlock ending with lastBlock.
/// the List must be empty and not inserted in a tree
/// before the operation
/// </summary>
/// <param name="firstBlock"></param>
/// <param name="lastBlock"></param>
internal void Apply(Block firstBlock, Block lastBlock)
{
Invariant.Assert(this.Parent == null, "Cannot Apply List Because It Is Inserted In The Tree Already.");
Invariant.Assert(this.IsEmpty, "Cannot Apply List Because It Is Not Empty.");
Invariant.Assert(firstBlock.Parent == lastBlock.Parent, "Cannot Apply List Because Block Are Not Siblings.");
TextContainer textContainer = this.TextContainer;
textContainer.BeginChange();
try
{
// Wrap all block items into this List element
this.Reposition(firstBlock.ElementStart, lastBlock.ElementEnd);
// Add ListItem elements
Block block = firstBlock;
while (block != null)
{
ListItem listItem;
if (block is List)
{
// To wrap List into list item we pull it into previous ListItem (if any) as sublist
listItem = block.ElementStart.GetAdjacentElement(LogicalDirection.Backward) as ListItem;
if (listItem != null)
{
// Wrap the List into preceding ListItem
listItem.Reposition(listItem.ContentStart, block.ElementEnd);
}
else
{
// No preceding ListItem. Create new one
listItem = new ListItem();
listItem.Reposition(block.ElementStart, block.ElementEnd);
}
}
else
{
// To wrap paragraph into list item we need to create a new one
//
listItem = new ListItem();
listItem.Reposition(block.ElementStart, block.ElementEnd);
// MS Word-like heuristic: clear margin from a paragraph before wrapping it into a list item
// Note: using TextContainer to make sure that undo unit is created.
block.ClearValue(Block.MarginProperty);
block.ClearValue(Block.PaddingProperty);
block.ClearValue(Paragraph.TextIndentProperty);
}
// Stop when the last paragraph is covered
block = block == lastBlock ? null : (Block)listItem.ElementEnd.GetAdjacentElement(LogicalDirection.Forward);
}
// We need to set appropriate FlowDirection property on the new List and its paragraph children.
// We take the FlowDirection value from the first paragraph's FlowDirection value.
TextRangeEdit.SetParagraphProperty(this.ElementStart, this.ElementEnd,
Paragraph.FlowDirectionProperty, firstBlock.GetValue(Paragraph.FlowDirectionProperty));
}
finally
{
textContainer.EndChange();
}
}
// Token: 0x06003B85 RID: 15237 RVA: 0x0010F26C File Offset: 0x0010D46C
internal static bool UnindentListItems(TextRange range)
{
if (!TextRangeEditLists.IsRangeWithinSingleList(range))
{
return(false);
}
ListItem listItem = TextPointerBase.GetListItem(range.Start);
ListItem listItem2 = TextPointerBase.GetListItem((TextPointer)TextRangeEdit.GetAdjustedRangeEnd(range.Start, range.End));
for (TextElement textElement = (TextElement)listItem2.Parent; textElement != listItem.Parent; textElement = (TextElement)textElement.Parent)
{
listItem2 = (textElement as ListItem);
}
if (listItem2 == null)
{
return(false);
}
if (listItem.PreviousListItem != null)
{
TextRangeEdit.SplitElement(listItem.ElementStart);
}
if (listItem2.NextListItem != null)
{
TextRangeEdit.SplitElement(listItem2.ElementEnd);
}
List list = (List)listItem.Parent;
ListItem listItem3 = list.Parent as ListItem;
if (listItem3 != null)
{
list.Reposition(null, null);
TextPointer contentEnd = listItem3.ContentEnd;
if (listItem3.ContentStart.CompareTo(listItem.ElementStart) == 0)
{
listItem3.Reposition(null, null);
}
else
{
listItem3.Reposition(listItem3.ContentStart, listItem.ElementStart);
}
if (contentEnd.CompareTo(listItem2.ElementEnd) != 0)
{
TextPointer contentEnd2 = listItem2.ContentEnd;
listItem2.Reposition(listItem2.ContentStart, contentEnd);
TextRangeEditLists.MergeLists(contentEnd2);
}
}
else
{
TextPointer elementStart = list.ElementStart;
TextPointer elementEnd = list.ElementEnd;
object value = list.GetValue(Block.FlowDirectionProperty);
list.Reposition(null, null);
ListItem listItem5;
for (ListItem listItem4 = listItem; listItem4 != null; listItem4 = ((listItem4 == listItem2) ? null : listItem5))
{
listItem5 = (listItem4.ElementEnd.GetAdjacentElement(LogicalDirection.Forward) as ListItem);
if (listItem4.ContentStart.CompareTo(listItem4.ContentEnd) == 0)
{
TextRangeEditTables.EnsureInsertionPosition(listItem4.ContentStart);
}
listItem4.Reposition(null, null);
}
TextRangeEdit.SetParagraphProperty(elementStart, elementEnd, Block.FlowDirectionProperty, value);
TextRangeEditLists.MergeLists(elementStart);
TextRangeEditLists.MergeLists(elementEnd);
}
return(true);
}
