public static void GetBeginAndEndCharacterIndices(
this SingleLineTextRange range,
ProjectBlockCollection blocks,
out int blockIndex,
out int sourceBegin,
out int sourceEnd,
out string text)
{
using (blocks.AcquireLock(RequestLock.Read))
{
// Start by getting the block based on the index.
Block block;
blockIndex = range.LinePosition.GetLineIndex(blocks.Count);
using (
blocks.AcquireBlockLock(
RequestLock.Read, RequestLock.Read, blockIndex, out block))
{
// Get the text and calculate the character indicies.
text = block.Text;
range.GetBeginAndEndCharacterIndices(text, out sourceBegin, out sourceEnd);
}
}
}
/// <summary>
/// Gets the Pango markup for a given line.
/// </summary>
/// <param name="lineIndex">The line.</param>
/// <param name="lineContexts">The line contexts.</param>
/// <returns></returns>
public string GetSelectionMarkup(
int lineIndex,
LineContexts lineContexts)
{
// Get the line markup from the underlying buffer.
string markup = LineBuffer.GetLineMarkup(lineIndex, lineContexts);
// Check to see if we are in the selection.
CharacterPosition beginCharacterPosition;
CharacterPosition endCharacterPosition;
bool containsLine = DisplayContext.Caret.Selection.ContainsLine(
LineBuffer, lineIndex, out beginCharacterPosition, out endCharacterPosition);
if (containsLine)
{
// Apply the markup to the line.
var linePosition = new LinePosition(lineIndex);
var singleLineTextRange = new SingleLineTextRange(
linePosition, beginCharacterPosition, endCharacterPosition);
return(SelectionRenderer.GetSelectionMarkup(markup, singleLineTextRange));
}
// Return the resulting markup.
return(markup);
}
/// <summary>
/// Takes the given string (which assumes a valid Pango markup) and
/// adds the markup to apply a selection to the string.
/// </summary>
/// <param name="pangoMarkup">The Pango markup to apply the selection.</param>
/// <param name="characters">The range of character to select.</param>
/// <returns>A Pango markup string with the selection applied.</returns>
public string GetSelectionMarkup(
string pangoMarkup,
SingleLineTextRange characters)
{
return(GetSelectionMarkup(
pangoMarkup, characters, "span", " background='#CCCCFF'"));
}
public InsertTextFromTextRangeOperation(
TextPosition destinationPosition,
SingleLineTextRange sourceRange)
{
DestinationPosition = destinationPosition;
SourceRange = sourceRange;
}
public IDeleteTextCommand <OperationContext> CreateDeleteTextCommand(
SingleLineTextRange range)
{
var operation = new DeleteTextOperation(range);
return(operation);
}
protected override void Do(
object context,
CommandFactoryManager <OperationContext> commandFactory,
object commandData,
OperationContext operationContext,
EditorViewController controller,
IDisplayContext displayContext,
TextPosition position)
{
var range =
new SingleLineTextRange(
displayContext.Caret.Position.LinePosition,
CharacterPosition.Word,
displayContext.Caret.Position.CharacterPosition);
IDeleteTextCommand <OperationContext> deleteCommand =
controller.CommandController.CreateDeleteTextCommand(range);
deleteCommand.UpdateTextPosition = DoTypes.All;
// Execute the command.
controller.CommandController.Do(deleteCommand, operationContext);
// If we have a text position, we need to set it.
if (operationContext.Results.HasValue)
{
displayContext.Caret.SetAndScrollToPosition(
operationContext.Results.Value.TextPosition);
}
}
/// <summary>
/// Initializes a new instance of the <see cref="InsertTextFromBlock" /> class.
/// </summary>
/// <param name="destinationPosition">The position to insert the text into.</param>
/// <param name="range">The range.</param>
public InsertTextFromIndexedBlock(
TextPosition destinationPosition,
SingleLineTextRange range)
{
DestinationPosition = destinationPosition;
Range = range;
}
public IDeleteTextCommand <OperationContext> CreateDeleteTextCommand(
SingleLineTextRange range)
{
// Create the command adapter and return it.
var command = new ProjectDeleteTextCommand(Project, range);
//Debug.WriteLine("CreateDeleteTextCommand: " + range);
return(command);
}
CreateInsertTextFromTextRangeCommand(
TextPosition destinationPosition,
SingleLineTextRange sourceRange)
{
var operation = new InsertTextFromTextRangeOperation(
destinationPosition, sourceRange);
return(operation);
}
public ProjectDeleteTextCommand(
Project project,
SingleLineTextRange range)
: base(project)
{
// Create the project command wrapper.
var command = new DeleteTextCommand(range);
// Set the command into the adapter.
Command = command;
}
public LineBufferOperationResults DeleteText(
int lineIndex,
int beginCharacterIndex,
int endCharacterIndex)
{
var range = new SingleLineTextRange(
new LinePosition(lineIndex),
new CharacterPosition(beginCharacterIndex),
new CharacterPosition(endCharacterIndex));
return(DeleteText(range));
}
public static void GetBeginAndEndCharacterIndices(
this SingleLineTextRange range,
ProjectBlockCollection blocks,
out int blockIndex,
out int sourceBegin,
out int sourceEnd)
{
string text;
GetBeginAndEndCharacterIndices(
range, blocks, out blockIndex, out sourceBegin, out sourceEnd, out text);
}
public void HandleBlank()
{
// Setup
string markup = string.Empty;
var selectionRenderer = new SelectionRenderer();
var characters = new SingleLineTextRange(0, 1, 2);
// Operation
string output = selectionRenderer.GetSelectionMarkup(markup, characters);
// Verification
Assert.AreEqual(string.Empty, output);
}
CreateInsertTextFromTextRangeCommand(
TextPosition destinationPosition,
SingleLineTextRange sourceRange)
{
// Create the command adapter and return it.
var command = new ProjectInsertTextFromTextRangeCommand(
Project, destinationPosition, sourceRange);
//Debug.WriteLine(
// "CreateInsertTextFromTextRangeCommand: " + destinationPosition + ", "
// + sourceRange);
return(command);
}
public void PlainEmptySelectionAtEndOfLine()
{
// Setup
const string markup = "this";
var selectionRenderer = new SelectionRenderer();
var characters = new SingleLineTextRange(0, 5, CharacterPosition.End);
// Operation
string output = selectionRenderer.GetSelectionMarkup(markup, characters);
// Verification
Assert.AreEqual("this", output);
}
public void PlainMiddleOfString()
{
// Setup
const string markup = "this is a string";
var selectionRenderer = new SelectionRenderer();
var characters = new SingleLineTextRange(0, 5, 9);
// Operation
string output = selectionRenderer.GetSelectionMarkup(markup, characters);
// Verification
Assert.AreEqual("this <span background='#CCCCFF'>is a</span> string", output);
}
public void HandleNull()
{
// Setup
const string markup = null;
var selectionRenderer = new SelectionRenderer();
var characters = new SingleLineTextRange(0, 1, 2);
// Operation
string output = selectionRenderer.GetSelectionMarkup(markup, characters);
// Verification
Assert.IsNull(output);
}
public ProjectInsertTextFromTextRangeCommand(
Project project,
TextPosition destinationPosition,
SingleLineTextRange sourceRange)
: base(project)
{
// Save the position for later.
this.destinationPosition = destinationPosition;
// Create the project command wrapper.
var command = new InsertTextFromIndexedBlock(
destinationPosition, sourceRange);
// Set the command into the adapter.
Command = command;
}
/// <summary>
/// Performs one of the exhaustive tests by taking the input and applying
/// the selection to characters 3-4.
/// </summary>
/// <param name="startIndex">The start index.</param>
/// <param name="endIndex">The end index.</param>
/// <param name="input">The input.</param>
/// <param name="desiredOutput">The output.</param>
protected void TestExhaustive(
int startIndex,
int endIndex,
string input,
string desiredOutput)
{
// Setup
var selectionRenderer = new SelectionRenderer();
var characters = new SingleLineTextRange(0, startIndex, endIndex);
// Operation
string output = selectionRenderer.GetSelectionMarkup(
input, characters, "s", String.Empty);
// Verification
Assert.AreEqual(desiredOutput, output);
}
/// <summary>
/// Initializes a new instance of the <see cref="DeleteTextOperation" /> class.
/// </summary>
/// <param name="characterRange">The character range.</param>
public DeleteTextOperation(SingleLineTextRange characterRange)
{
TextRange = characterRange;
}
public DeleteTextCommand(SingleLineTextRange range)
: base(new TextPosition(range.LinePosition, range.BeginCharacterPosition))
{
// DREM ToTextPosition
End = range.EndCharacterPosition;
}
/// <summary>
/// Deletes the text from the buffer using a <see cref="DeleteTextOperation" />.
/// </summary>
/// <param name="characterRange">The character range.</param>
/// <returns></returns>
public LineBufferOperationResults DeleteText(
SingleLineTextRange characterRange)
{
return(Do(new DeleteTextOperation(characterRange)));
}
public DeleteTextCommand(SingleLineTextRange range)
: base(new TextPosition(range.LinePosition, range.BeginCharacterPosition))
{
// DREM ToTextPosition
End = range.EndCharacterPosition;
}
/// <summary>
/// Gets the indexes in the markup string for the given character range. This
/// handles mapping attributes and entities as zero and one-length characters
/// respectively. It also returns information to optimize the search for XML
/// tags inside the Pango string.
/// </summary>
/// <param name="pangoMarkup">The pango markup.</param>
/// <param name="characters">The characters.</param>
/// <param name="startIndex">The start index.</param>
/// <param name="endIndex">The end index.</param>
/// <param name="leadingXmlDepth">The number of nested XML elements at the
/// point of the
/// <paramref name="startIndex"/>.
/// <param name="leadingXmlIndex">
/// The character index of the opening XML tag before the selection. If this
/// -1 one, then there is no opening tag and
/// <paramref name="leadingXmlDepth"/> will be zero.
/// </param></param>
/// <param name="leadingXmlIndex">Index of the leading XML.</param>
/// <param name="trailingXmlDepth">The number of nested XML elements at the
/// point the selection ends.</param>
private static void GetMarkupIndexes(
string pangoMarkup,
SingleLineTextRange characters,
out int startIndex,
out int endIndex,
out int leadingXmlDepth,
out int leadingXmlIndex,
out int trailingXmlDepth)
{
// Strip off the Pango formatting so we can calculate lengths. We
// add in an extra " " so GetCharacterIndex can handle end of file
// lengths.
string plainText = GetText(pangoMarkup) + " ";
int firstCharacterIndex;
int lastCharacterIndex;
characters.GetFirstAndLastCharacterIndices(
plainText, out firstCharacterIndex, out lastCharacterIndex);
// Because of how the loop works, we have to set the startIndex to
// a sane default and only check to see if we found the endIndex.
startIndex = -1;
leadingXmlDepth = 0;
trailingXmlDepth = 0;
leadingXmlIndex = -1;
// Check for the selection starting at the beginning.
if (characters.FirstCharacterPosition == CharacterPosition.Begin)
{
startIndex = 0;
}
// Loop through the entire markup string. We keep track of two
// indexes. The markupIndex is the index inside the markup string.
// The character index is the logical characters, treating XML tags
// as zero-width characters, and is used to match against characters.
for (int markupIndex = 0,
characterIndex = 0;
markupIndex < pangoMarkup.Length;
markupIndex++)
{
// Keep track of the starting markup index since we'll use that
// to find the beginning of an XML tag or entity.
int markupIndexAnchor = markupIndex;
// Grab the character at this position.
char c = pangoMarkup[markupIndex];
// Use the character to determine if we have an entity or tag.
switch (c)
{
case '&':
// Treat the entire entity as a single character.
while (c != ';')
{
markupIndex++;
c = pangoMarkup[markupIndex];
}
// We don't include the final markupIndex because of
// the for loop increment.
break;
case '<':
// Grab the next character to see if we have an opening
// or closing tag.
markupIndex++;
c = pangoMarkup[markupIndex];
if (c == '/')
{
// If we are still looking for the start index,
// process the leading elements.
if (startIndex == -1)
{
// If we are closing the outer-most tag, then clear
// the index since we don't need to process it.
if (leadingXmlDepth == 1)
{
leadingXmlIndex = -1;
}
// Decrement the depth.
leadingXmlDepth--;
}
// Decrement the depth of trailing.
trailingXmlDepth--;
}
else
{
// If we are still looking for the start index,
// process the leading elements.
if (startIndex == -1)
{
// We need to first check to see if we are at
// the selection point. If we are, then we want
// to start before we open a new tag.
if (characterIndex == firstCharacterIndex)
{
// Save the start index for the selection.
startIndex = markupIndexAnchor;
}
else
{
// Increment the depth of the tag.
leadingXmlDepth++;
// If we are the outer-most tag, then keep track
// of the start index.
if (leadingXmlDepth == 1)
{
leadingXmlIndex = markupIndexAnchor;
}
}
}
else if (characterIndex == lastCharacterIndex)
{
// This is right before the selection ends.
// Since this is an opening tag, we want to
// stop here.
endIndex = markupIndexAnchor;
return;
}
// Increment the trailing XML depth.
trailingXmlDepth++;
}
// Skip over the entire XML tag.
while (c != '>')
{
markupIndex++;
c = pangoMarkup[markupIndex];
}
// We continue since we want to treat XML tags as
// zero-width characters.
continue;
}
// Check to see if we have the start index.
if (startIndex == -1 &&
characterIndex == firstCharacterIndex)
{
startIndex = markupIndexAnchor;
}
// Check to see if we are done processing.
if (characterIndex == lastCharacterIndex)
{
endIndex = markupIndexAnchor;
return;
}
// Increment the character index.
characterIndex++;
}
// If we got this far, we hit the end of the line, so just mark the
// end as the last character in the string.
endIndex = pangoMarkup.Length;
}
/// <summary>
/// Takes the given string (which assumes a valid Pango markup) and
/// adds the markup to apply a selection to the string.
/// </summary>
/// <param name="markup">The markup.</param>
/// <param name="characters">The range of character to select.</param>
/// <param name="selectionTag">The selection tag to use.</param>
/// <param name="selectionAttributes">The selection attributes to use.</param>
/// <returns>
/// A Pango markup string with the selection applied.
/// </returns>
public string GetSelectionMarkup(
string markup,
SingleLineTextRange characters,
string selectionTag,
string selectionAttributes)
{
// Check for nulls and invalid strings.
if (String.IsNullOrEmpty(markup))
{
// We can't really do anything with this.
return(markup);
}
// The primary concern for applying the selection is that we already
// have Pango markup in the string and we have to maintain that
// markup while adjusting it. Pango doesn't allow for non-XML rules
// such as nested spans, so we go through the string and keep track
// of the spans as they apply. When we get to the selection, we
// disable those spans and replace them with ones of our own.
//
// In addition, the character range does not apply to entities such
// as & so the entity is treated as a single string.
// To start with, we need to get the index in the string for the
// selection.
int startIndex,
endIndex,
leadingXmlDepth,
leadingXmlIndex,
trailingXmlDepth;
GetMarkupIndexes(
markup,
characters,
out startIndex,
out endIndex,
out leadingXmlDepth,
out leadingXmlIndex,
out trailingXmlDepth);
// If we have a startIndex of -1, that means that the selection is
// the end of the line and we have nothing.
if (startIndex < 0)
{
return(markup);
}
// Use a string builder and build up the selection markup, this way
// we avoid as much object creation as possible.
var buffer = new StringBuilder();
// Add in all the text before the selection.
string leadingMarkup = markup.Substring(0, startIndex);
buffer.Append(leadingMarkup);
// Get all the tags that were opened at the point the selection
// starts and close them.
TagInfo[] leadingTags = null;
if (leadingXmlDepth > 0)
{
// Allocate space equal to the depth since we won't get any
// larger than that.
leadingTags = new TagInfo[leadingXmlDepth];
// Get all the tags in the leading markup.
GetOpenTags(leadingMarkup, leadingXmlIndex, startIndex, 0, ref leadingTags);
// Close all the leading tags in reverse order.
for (int index = leadingXmlDepth - 1;
index >= 0;
index--)
{
buffer.AppendFormat("</{0}>", leadingTags[index].Name);
}
}
// Add the selection tag itself.
buffer.AppendFormat("<{0}{1}>", selectionTag, selectionAttributes);
// Open up the tags that were open before the selection.
if (leadingTags != null)
{
// Close all the leading tags in reverse order.
for (int index = 0;
index < leadingXmlDepth;
index++)
{
buffer.Append(leadingTags[index].ToString());
}
}
// Add in the text inside the selection.
string innerSelectionMarkup = markup.Substring(
startIndex, endIndex - startIndex);
buffer.Append(innerSelectionMarkup);
// Get the tags that were inside the selection so we can close them.
TagInfo[] trailingTags = null;
if (trailingXmlDepth > 0)
{
// Allocate space equal to the depth since we won't get any
// larger than that.
trailingTags = new TagInfo[trailingXmlDepth];
// Copy in any of the tags from the leading to fill the space.
if (leadingTags != null)
{
int total = Math.Min(trailingXmlDepth, leadingXmlDepth);
for (int index = 0;
index < total;
index++)
{
trailingTags[index] = leadingTags[index];
}
}
// Get all the tags in the leading markup.
GetOpenTags(
innerSelectionMarkup,
0,
endIndex - startIndex,
leadingXmlDepth,
ref trailingTags);
// Close all the leading tags in reverse order.
for (int index = trailingXmlDepth - 1;
index >= 0;
index--)
{
buffer.AppendFormat("</{0}>", trailingTags[index].Name);
}
}
// Close the selection tag.
buffer.AppendFormat("</{0}>", selectionTag);
// Open up the tags that were open before the selection ended.
if (trailingTags != null)
{
// Close all the leading tags in reverse order.
for (int index = 0;
index < trailingXmlDepth;
index++)
{
buffer.Append(trailingTags[index].ToString());
}
}
// Add everything after the markup.
buffer.Append(markup.Substring(endIndex));
// Combine the list together and return it.
string selectionMarkup = buffer.ToString();
return(selectionMarkup);
}
