/// <remarks>
/// Executes this edit action
/// </remarks>
/// <param name="editor">The <see cref="TextArea"/> which is used for callback purposes</param>
public override void Execute(TextBoxControl editor)
{
if (editor.ReadOnly)
{
return;
}
editor.BeginUpdate();
editor.UndoStack.StartUndoGroup();
try
{
//////////////////////////////////////
/* zx 2015/9/10 XML文本编辑器中按下回车键只有以下情形才有效
* 1.在首行中右标记符>后点击回车键时，该节点添加一个中间行，光标位置后的元素全部添加到新建的中间行中
* 2.光标落入文本元素中时，不管是在首行还是在中间行，该节点顺次添加一个中间行，光标以后的文本及该行中其他元素一并添加到新建的中间行中
* 3.光标落入中间行中无任何有效元素的区域（光标前只存在空格和tab键时），该节点顺次添加中间行，光标以后的文本及该行中的其他元素一并添加到新建的中间行中
*////////////////////////////////////
if (editor.HandleKeyPress('\n'))
{
return;
}
bool isEnd = false;
bool isAllSpace = false;
int curLineNr = editor.Caret.Line;
Paragraph pg = editor.GetParagraph(curLineNr);
pg.CheckIsIncludeVaildSegment(ref isEnd, ref isAllSpace);
int insertLocation = 0;
Block segment = pg.GetLineSegmentBeforeCaret(editor.Caret.Column, ref insertLocation);
if (segment != null)
{
List <string> spitList = new List <string>();
spitList = pg.SpitTextSegmentByCaret(editor.Caret.Column);
// 当鼠标光标落在文本元素后时
if (spitList.Count == 2 && (string.IsNullOrEmpty(spitList[0]) || string.IsNullOrEmpty(spitList[1])))
{
int caretCol = 0;
Paragraph newPG = editor.InsertParagraph(pg, ref caretCol);
if (newPG != null)
{
int index = pg.Blocks.ToList().IndexOf(segment);
if (string.IsNullOrEmpty(spitList[0]))
{
index -= 1;
}
List <Block> lstDelBlock = new List <Block>();
for (int i = 0; i < pg.Blocks.Length; i++)
{
if (i > index)
{
lstDelBlock.Add(pg.Blocks[i]);
}
}
pg.Remove(lstDelBlock);
newPG.AddSegment(lstDelBlock.ToArray());
editor.Caret.Position = new TextLocation(caretCol, editor.Caret.Line + 1);
editor.Caret.UpdateCaretPosition();
}
}
else if (spitList.Count == 2 && !string.IsNullOrEmpty(spitList[0]) && !string.IsNullOrEmpty(spitList[1]))
{
int caretCol = 0;
Paragraph newPG = editor.InsertParagraph(pg, ref caretCol);
if (newPG != null)
{
int index = pg.Blocks.ToList().IndexOf(segment);
List <Block> lstDelBlock = new List <Block>();
for (int i = 0; i < pg.Blocks.Length; i++)
{
if (i > index && pg.Blocks[i] != segment)
{
lstDelBlock.Add(pg.Blocks[i]);
}
}
pg.Remove(lstDelBlock);
pg.Remove(new List <Block>()
{
segment
});
Block segBefore = new Block(BlockType.Text, spitList[0]);
pg.AddSegment(segBefore);
Block segAfter = new Block(BlockType.Text, spitList[1]);
newPG.AddSegment(segAfter);
newPG.AddSegment(lstDelBlock.ToArray());
editor.Caret.Position = new TextLocation(caretCol, editor.Caret.Line + 1);
editor.Caret.UpdateCaretPosition();
}
}
}
else if (pg.Blocks.Length == 0 || isAllSpace)
{
int caretCol = 0;
Paragraph newPG = editor.InsertParagraph(pg, ref caretCol);
editor.Caret.Position = new TextLocation(caretCol, editor.Caret.Line + 1);
editor.Caret.UpdateCaretPosition();
}
}
finally
{
editor.UndoStack.EndUndoGroup();
editor.EndUpdate();
}
}