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//
// ValaTextEditorExtension.cs
//
// Authors:
// Levi Bard <taktaktaktaktaktaktaktaktaktak@gmail.com>
//
// Copyright (C) 2008 Levi Bard
// Based on CBinding by Marcos David Marin Amador <MarcosMarin@gmail.com>
//
// This source code is licenced under The MIT License:
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System;
using System.IO;
using System.Text;
using System.Linq;
using System.Text.RegularExpressions;
using System.Collections.Generic;
using System.Threading;
using MonoDevelop.Ide;
using MonoDevelop.Ide.Gui;
using MonoDevelop.Ide.Gui.Content;
using MonoDevelop.Ide.CodeCompletion;
using MonoDevelop.Projects.Dom;
using MonoDevelop.Projects.Dom.Output;
using MonoDevelop.Core;
using MonoDevelop.Components;
using Gtk;
using MonoDevelop.ValaBinding.Parser;
namespace MonoDevelop.ValaBinding
{
public class ValaTextEditorExtension : CompletionTextEditorExtension, IPathedDocument
{
// Allowed chars to be next to an identifier
private static char[] allowedChars = new char[] { ' ', '\t', '\r', '\n',
':', '=', '*', '+', '-', '/', '%', ',', '&',
'|', '^', '{', '}', '[', ']', '(', ')', '\n', '!', '?', '<', '>'
};
private static char[] operators = new char[] {
'=', '+', '-', ',', '&', '|',
'^', '[', '!', '?', '<', '>', ':'
};
private ProjectInformation Parser {
get {
ValaProject project = Document.Project as ValaProject;
return (null == project)? null: ProjectInformationManager.Instance.Get (project);
}
}// Parser
protected Mono.TextEditor.TextEditorData textEditorData{ get; set; }
public override bool KeyPress (Gdk.Key key, char keyChar, Gdk.ModifierType modifier)
{
string lineText = Editor.GetLineText (Editor.Caret.Line);
// smart formatting strategy
if (TextEditorProperties.IndentStyle == IndentStyle.Smart) {
if (key == Gdk.Key.Return) {
if (lineText.TrimEnd ().EndsWith ("{")) {
Editor.InsertAtCaret ("\n" + TextEditorProperties.IndentString + Editor.Document.GetLineIndent (Editor.Caret.Line));
return false;
}
} else if (key == Gdk.Key.braceright && AllWhiteSpace (lineText)
&& lineText.StartsWith (TextEditorProperties.IndentString)) {
if (lineText.Length > 0)
lineText = lineText.Substring (TextEditorProperties.IndentString.Length);
var lineSegment = Editor.Document.GetLine (Editor.Caret.Line);
Editor.Replace (lineSegment.Offset, lineSegment.EditableLength, lineText + "}");
return false;
}
}
return base.KeyPress (key, keyChar, modifier);
}
/// <summary>
/// Expression to match instance construction/initialization
/// </summary>
private static Regex initializationRegex = new Regex (@"(((?<typename>\w[\w\d\.<>]*)\s+)?(?<variable>\w[\w\d]*)\s*=\s*)?new\s*(?<constructor>\w[\w\d\.<>]*)?", RegexOptions.Compiled);
public override ICompletionDataList HandleCodeCompletion (
CodeCompletionContext completionContext, char completionChar)
{
string lineText = null;
ProjectInformation parser = Parser;
var loc = Editor.Document.OffsetToLocation (completionContext.TriggerOffset);
int line = loc.Line, column = loc.Column;
switch (completionChar) {
case '.': // foo.[complete]
lineText = Editor.GetLineText (line);
if (column > lineText.Length){ column = lineText.Length; }
lineText = lineText.Substring (0, column - 1);
string itemName = GetTrailingSymbol (lineText);
if (string.IsNullOrEmpty (itemName))
return null;
return GetMembersOfItem (itemName, line, column);
case '\t':
case ' ':
lineText = Editor.GetLineText (line);
if (0 == lineText.Length){ return null; }
if (column > lineText.Length){ column = lineText.Length; }
lineText = lineText.Substring (0, column-1).Trim ();
if (lineText.EndsWith ("new")) {
return CompleteConstructor (lineText, line, column);
} else if (lineText.EndsWith ("is")) {
ValaCompletionDataList list = new ValaCompletionDataList ();
ThreadPool.QueueUserWorkItem (delegate {
parser.GetTypesVisibleFrom (Document.FileName, line, column, list);
});
return list;
} else if (0 < lineText.Length) {
char lastNonWS = lineText[lineText.Length-1];
if (0 <= Array.IndexOf (operators, lastNonWS) ||
(1 == lineText.Length && 0 > Array.IndexOf (allowedChars, lastNonWS))) {
return GlobalComplete (completionContext);
}
}
break;
default:
if (0 <= Array.IndexOf (operators, completionChar)) {
return GlobalComplete (completionContext);
}
break;
}
return null;
}
static string GetTrailingSymbol (string text)
{
// remove the trailing '.'
if (text.EndsWith (".", StringComparison.Ordinal))
text = text.Substring (0, text.Length-1);
int nameStart = text.LastIndexOfAny (allowedChars);
return text.Substring (nameStart+1).Trim ();
}
/// <summary>
/// Perform constructor-specific completion
/// </summary>
private ValaCompletionDataList CompleteConstructor (string lineText, int line, int column)
{
ProjectInformation parser = Parser;
Match match = initializationRegex.Match (lineText);
ValaCompletionDataList list = new ValaCompletionDataList ();
ThreadPool.QueueUserWorkItem (delegate {
if (match.Success) {
// variable initialization
if (match.Groups["typename"].Success || "var" != match.Groups["typename"].Value) {
// simultaneous declaration and initialization
parser.GetConstructorsForType (match.Groups["typename"].Value, Document.FileName, line, column, list);
} else if (match.Groups["variable"].Success) {
// initialization of previously declared variable
parser.GetConstructorsForExpression (match.Groups["variable"].Value, Document.FileName, line, column, list);
}
if (0 == list.Count) {
// Fallback to known types
parser.GetTypesVisibleFrom (Document.FileName, line, column, list);
}
}
});
return list;
}// CompleteConstructor
public override ICompletionDataList CodeCompletionCommand (
CodeCompletionContext completionContext)
{
if (null == (Document.Project as ValaProject)){ return null; }
int pos = completionContext.TriggerOffset;
ICompletionDataList list = HandleCodeCompletion(completionContext, Editor.GetTextBetween (pos - 1, pos)[0]);
if (null == list) {
list = GlobalComplete (completionContext);
}
return list;
}
/// <summary>
/// Get the members of a symbol
/// </summary>
private ValaCompletionDataList GetMembersOfItem (string itemFullName, int line, int column)
{
ProjectInformation info = Parser;
if (null == info){ return null; }
ValaCompletionDataList list = new ValaCompletionDataList ();
ThreadPool.QueueUserWorkItem (delegate {
info.Complete (itemFullName, Document.FileName, line, column, list);
});
return list;
}
/// <summary>
/// Complete all symbols visible from a given location
/// </summary>
private ValaCompletionDataList GlobalComplete (CodeCompletionContext context)
{
ProjectInformation info = Parser;
if (null == info){ return null; }
ValaCompletionDataList list = new ValaCompletionDataList ();
var loc = Editor.Document.OffsetToLocation (context.TriggerOffset);
ThreadPool.QueueUserWorkItem (delegate {
info.GetSymbolsVisibleFrom (Document.FileName, loc.Line + 1, loc.Column + 1, list);
});
return list;
}
public override IParameterDataProvider HandleParameterCompletion (
CodeCompletionContext completionContext, char completionChar)
{
if (completionChar != '(')
return null;
ProjectInformation info = Parser;
if (null == info){ return null; }
int position = Editor.Document.GetLine (Editor.Caret.Line).Offset;
string lineText = Editor.GetTextBetween (position, Editor.Caret.Offset - 1).TrimEnd ();
string functionName = string.Empty;
Match match = initializationRegex.Match (lineText);
if (match.Success && match.Groups["constructor"].Success) {
string[] tokens = match.Groups["constructor"].Value.Split('.');
string overload = tokens[tokens.Length-1];
string typename = (match.Groups["typename"].Success? match.Groups["typename"].Value: null);
int index = 0;
if (1 == tokens.Length || null == typename) {
// Ideally if typename is null and token length is longer than 1,
// we have an expression like: var w = new x.y.z(); and
// we would check whether z is the type or if y.z is an overload for type y
typename = overload;
} else if ("var".Equals (typename, StringComparison.Ordinal)) {
typename = match.Groups["constructor"].Value;
} else {
// Foo.Bar bar = new Foo.Bar.blah( ...
for (string[] typeTokens = typename.Split ('.'); index < typeTokens.Length && index < tokens.Length; ++index) {
if (!typeTokens[index].Equals (tokens[index], StringComparison.Ordinal)) {
break;
}
}
List<string> overloadTokens = new List<string> ();
for (int i=index; i<tokens.Length; ++i) {
overloadTokens.Add (tokens[i]);
}
overload = string.Join (".", overloadTokens.ToArray ());
}
// HACK: Generics
if (0 < (index = overload.IndexOf ("<", StringComparison.Ordinal))) {
overload = overload.Substring (0, index);
}
if (0 < (index = typename.IndexOf ("<", StringComparison.Ordinal))) {
typename = typename.Substring (0, index);
}
// Console.WriteLine ("Constructor: type {0}, overload {1}", typename, overload);
return new ParameterDataProvider (Document, info, typename, overload);
}
int nameStart = lineText.LastIndexOfAny (allowedChars) + 1;
functionName = lineText.Substring (nameStart).Trim ();
return (string.IsNullOrEmpty (functionName)? null: new ParameterDataProvider (Document, info, functionName));
}
private bool AllWhiteSpace (string lineText)
{
foreach (char c in lineText)
if (!char.IsWhiteSpace (c))
return false;
return true;
}
#region IPathedDocument implementation
public event EventHandler<DocumentPathChangedEventArgs> PathChanged;
public Gtk.Widget CreatePathWidget (int index)
{
PathEntry[] path = CurrentPath;
if (null == path || 0 > index || path.Length <= index) {
return null;
}
object tag = path[index].Tag;
DropDownBoxListWindow.IListDataProvider provider = null;
if (tag is ICompilationUnit) {
provider = new CompilationUnitDataProvider (Document);
} else {
provider = new DataProvider (Document, tag, GetAmbience ());
}
DropDownBoxListWindow window = new DropDownBoxListWindow (provider);
window.SelectItem (tag);
return window;
}
public PathEntry[] CurrentPath {
get;
private set;
}
protected virtual void OnPathChanged (DocumentPathChangedEventArgs args)
{
if (null != PathChanged) {
PathChanged (this, args);
}
}
#endregion
// Yoinked from C# binding
void UpdatePath (object sender, Mono.TextEditor.TextDocumentLocationEventArgs e)
{
var unit = Document.CompilationUnit;
if (unit == null)
return;
var loc = textEditorData.Caret.Location;
IType type = unit.GetTypeAt (loc.Line, loc.Column);
List<PathEntry> result = new List<PathEntry> ();
Ambience amb = GetAmbience ();
IMember member = null;
INode node = (INode)unit;
if (type != null && type.ClassType != ClassType.Delegate) {
member = type.GetMemberAt (loc.Line, loc.Column);
}
if (null != member) {
node = member;
} else if (null != type) {
node = type;
}
while (node != null) {
PathEntry entry;
if (node is ICompilationUnit) {
if (!Document.ParsedDocument.UserRegions.Any ())
break;
FoldingRegion reg = Document.ParsedDocument.UserRegions.Where (r => r.Region.Contains (loc.Line, loc.Column)).LastOrDefault ();
if (reg == null) {
entry = new PathEntry (GettextCatalog.GetString ("No region"));
} else {
entry = new PathEntry (CompilationUnitDataProvider.Pixbuf, reg.Name);
}
entry.Position = EntryPosition.Right;
} else {
entry = new PathEntry (ImageService.GetPixbuf (((IMember)node).StockIcon, IconSize.Menu), amb.GetString ((IMember)node, OutputFlags.IncludeGenerics | OutputFlags.IncludeParameters | OutputFlags.ReformatDelegates));
}
entry.Tag = node;
result.Insert (0, entry);
node = node.Parent;
}
PathEntry noSelection = null;
if (type == null) {
noSelection = new PathEntry (GettextCatalog.GetString ("No selection")) { Tag = new CustomNode (Document.CompilationUnit) };
} else if (member == null && type.ClassType != ClassType.Delegate)
noSelection = new PathEntry (GettextCatalog.GetString ("No selection")) { Tag = new CustomNode (type) };
if (noSelection != null) {
result.Add (noSelection);
}
var prev = CurrentPath;
CurrentPath = result.ToArray ();
OnPathChanged (new DocumentPathChangedEventArgs (prev));
}
public override void Initialize ()
{
base.Initialize ();
textEditorData = Document.Editor;
UpdatePath (null, null);
textEditorData.Caret.PositionChanged += UpdatePath;
Document.DocumentParsed += delegate { UpdatePath (null, null); };
}
// Yoinked from C# binding
class CustomNode : MonoDevelop.Projects.Dom.AbstractNode
{
public CustomNode (INode parent)
{
this.Parent = parent;
}
}
}
}
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