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//
// ProjectedCompletionExtension.cs
//
// Author:
// Mike Krüger <mkrueger@xamarin.com>
//
// Copyright (c) 2015 Xamarin Inc. (http://xamarin.com)
//
// 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 MonoDevelop.Ide.Editor.Extension;
using System.Collections.Generic;
using MonoDevelop.Ide.CodeCompletion;
using System.Threading.Tasks;
namespace MonoDevelop.Ide.Editor.Projection
{
sealed class ProjectedCompletionExtension : CompletionTextEditorExtension, IProjectionExtension
{
DocumentContext ctx;
IReadOnlyList<Projection> projections;
public IReadOnlyList<Projection> Projections {
get {
return projections;
}
set {
projections = value;
}
}
public ProjectedCompletionExtension (DocumentContext ctx, IReadOnlyList<Projection> projections)
{
if (projections == null)
throw new ArgumentNullException ("projections");
this.ctx = ctx;
this.projections = projections;
}
public override bool IsValidInContext (DocumentContext context)
{
var pctx = context as ProjectedDocumentContext;
if (pctx == null)
return false;
return pctx.ProjectedEditor.GetContent<CompletionTextEditorExtension> () != null;
}
internal protected override bool IsActiveExtension ()
{
return IsInProjection ();
}
bool IsInProjection ()
{
int offset = Editor.CaretOffset;
foreach (var p in projections) {
foreach (var seg in p.ProjectedSegments) {
if (seg.ContainsOriginal (offset))
return true;
}
}
return false;
}
Projection GetProjectionAt (int offset)
{
foreach (var projection in projections) {
foreach (var seg in projection.ProjectedSegments) {
if (seg.ContainsOriginal (offset)) {
projection.ProjectedEditor.CaretOffset = seg.FromOriginalToProjected (offset);
return projection;
}
}
}
return null;
}
CompletionTextEditorExtension GetExtensionAt (int offset)
{
var projection = GetProjectionAt (offset);
if (projection != null) {
var result = projection.ProjectedEditor.GetContent<CompletionTextEditorExtension> ();
if (result != null && CompletionWidget != null) {
result.CompletionWidget = new ProjectedCompletionWidget (CompletionWidget, projection);
if (result.CurrentCompletionContext == null)
result.CurrentCompletionContext = result.CompletionWidget.CurrentCodeCompletionContext;
}
result.Next = Next;
return result;
}
return null;
}
class ProjectedCompletionWidget : ICompletionWidget
{
readonly ICompletionWidget completionWidget;
readonly Projection projection;
public ProjectedCompletionWidget (ICompletionWidget completionWidget, Projection projection)
{
if (completionWidget == null)
throw new ArgumentNullException ("completionWidget");
if (projection == null)
throw new ArgumentNullException ("projection");
this.projection = projection;
this.completionWidget = completionWidget;
}
#region ICompletionWidget implementation
public double ZoomLevel {
get {
return completionWidget.ZoomLevel;
}
}
event EventHandler ICompletionWidget.CompletionContextChanged {
add {
completionWidget.CompletionContextChanged += value;
}
remove {
completionWidget.CompletionContextChanged -= value;
}
}
string ICompletionWidget.GetText (int startOffset, int endOffset)
{
return completionWidget.GetText(startOffset, endOffset);
}
char ICompletionWidget.GetChar (int offset)
{
return projection.ProjectedEditor.GetCharAt (offset);
}
void ICompletionWidget.Replace (int offset, int count, string text)
{
completionWidget.Replace (offset, count, text);
}
int ConvertOffset (int triggerOffset)
{
int result = triggerOffset;
foreach (var seg in projection.ProjectedSegments) {
if (seg.ContainsProjected (result)) {
result = seg.FromProjectedToOriginal (result);
break;
}
}
return result;
}
int ProjectOffset (int offset)
{
int result = offset;
foreach (var seg in projection.ProjectedSegments) {
if (seg.ContainsOriginal (result)) {
result = seg.FromOriginalToProjected (result);
break;
}
}
return result;
}
CodeCompletionContext ICompletionWidget.CreateCodeCompletionContext (int triggerOffset)
{
var originalTriggerOffset = ConvertOffset (triggerOffset);
var completionContext = completionWidget.CreateCodeCompletionContext (originalTriggerOffset);
return ConvertContext (completionContext, projection);
}
string ICompletionWidget.GetCompletionText (CodeCompletionContext ctx)
{
return completionWidget.GetCompletionText (ImportContext (ctx, projection));
}
void ICompletionWidget.SetCompletionText (CodeCompletionContext ctx, string partial_word, string complete_word)
{
completionWidget.SetCompletionText (ImportContext (ctx, projection), partial_word, complete_word);
}
void ICompletionWidget.SetCompletionText (CodeCompletionContext ctx, string partial_word, string complete_word, int completeWordOffset)
{
completionWidget.SetCompletionText (ImportContext (ctx, projection), partial_word, complete_word, completeWordOffset);
}
CodeCompletionContext ICompletionWidget.CurrentCodeCompletionContext {
get {
return ConvertContext (completionWidget.CurrentCodeCompletionContext, projection);
}
}
int ICompletionWidget.CaretOffset {
get {
return projection.ProjectedEditor.CaretOffset = ConvertOffset (completionWidget.CaretOffset);
}
set {
completionWidget.CaretOffset = ProjectOffset (value);
}
}
int ICompletionWidget.TextLength {
get {
return projection.ProjectedEditor.Length;
}
}
int ICompletionWidget.SelectedLength {
get {
return completionWidget.SelectedLength;
}
}
Gtk.Style ICompletionWidget.GtkStyle {
get {
return completionWidget.GtkStyle;
}
}
#endregion
}
CompletionTextEditorExtension GetCurrentExtension ()
{
return GetExtensionAt (Editor.CaretOffset);
}
public override bool CanRunCompletionCommand ()
{
var projectedExtension = GetCurrentExtension ();
if (projectedExtension == null)
return false;
return projectedExtension.CanRunCompletionCommand ();
}
public override bool CanRunParameterCompletionCommand ()
{
var projectedExtension = GetCurrentExtension ();
if (projectedExtension == null)
return false;
return projectedExtension.CanRunParameterCompletionCommand ();
}
public override string CompletionLanguage {
get {
var projectedExtension = GetCurrentExtension ();
if (projectedExtension == null)
return base.CompletionLanguage;
return projectedExtension.CompletionLanguage;
}
}
public override bool GetCompletionCommandOffset (out int cpos, out int wlen)
{
var projectedExtension = GetCurrentExtension ();
if (projectedExtension == null) {
cpos = 0;
wlen = 0;
return false;
}
return projectedExtension.GetCompletionCommandOffset (out cpos, out wlen);
}
public override Task<int> GetCurrentParameterIndex (int startOffset, System.Threading.CancellationToken token)
{
var projectedExtension = GetExtensionAt (startOffset);
if (projectedExtension == null)
return Task.FromResult (-1);
return projectedExtension.GetCurrentParameterIndex (startOffset, token);
}
public override Task<int> GuessBestMethodOverload (ParameterHintingResult provider, int currentOverload, System.Threading.CancellationToken token)
{
var projectedExtension = GetCurrentExtension ();
if (projectedExtension == null)
return Task.FromResult (-1);
return projectedExtension.GuessBestMethodOverload (provider, currentOverload, token);
}
public override System.Threading.Tasks.Task<MonoDevelop.Ide.CodeCompletion.ICompletionDataList> HandleCodeCompletionAsync (MonoDevelop.Ide.CodeCompletion.CodeCompletionContext completionContext, CompletionTriggerInfo triggerInfo, System.Threading.CancellationToken token)
{
var projectedExtension = GetExtensionAt (completionContext.TriggerOffset);
if (projectedExtension == null)
return null;
return projectedExtension.HandleCodeCompletionAsync (ConvertContext (completionContext), triggerInfo, token);
}
public override Task<ParameterHintingResult> HandleParameterCompletionAsync (MonoDevelop.Ide.CodeCompletion.CodeCompletionContext completionContext, char completionChar, System.Threading.CancellationToken token)
{
var projectedExtension = GetExtensionAt (completionContext.TriggerOffset);
if (projectedExtension == null)
return Task.FromResult<ParameterHintingResult> (null);
return projectedExtension.HandleParameterCompletionAsync (ConvertContext (completionContext), completionChar, token);
}
public override bool KeyPress (KeyDescriptor descriptor)
{
var task = ctx.GetPartialProjectionsAsync ();
if (task != null)
projections = task.Result;
var projectedExtension = GetCurrentExtension();
if (projectedExtension != null) {
return projectedExtension.KeyPress (descriptor);
}
return base.KeyPress (descriptor);
}
public override Task<ParameterHintingResult> ParameterCompletionCommand (MonoDevelop.Ide.CodeCompletion.CodeCompletionContext completionContext)
{
var projectedExtension = GetExtensionAt (completionContext.TriggerOffset);
if (projectedExtension == null)
return null;
return projectedExtension.ParameterCompletionCommand (ConvertContext (completionContext));
}
public override void RunCompletionCommand ()
{
var projectedExtension = GetCurrentExtension();
if (projectedExtension == null)
return;
projectedExtension.RunCompletionCommand ();
}
public override void RunParameterCompletionCommand ()
{
var projectedExtension = GetCurrentExtension();
if (projectedExtension == null)
return;
projectedExtension.RunParameterCompletionCommand ();
}
public override void RunShowCodeTemplatesWindow ()
{
var projectedExtension = GetCurrentExtension();
if (projectedExtension == null)
return;
projectedExtension.RunShowCodeTemplatesWindow ();
}
public override MonoDevelop.Ide.CodeCompletion.ICompletionDataList ShowCodeSurroundingsCommand (MonoDevelop.Ide.CodeCompletion.CodeCompletionContext completionContext)
{
var projectedExtension = GetExtensionAt (completionContext.TriggerOffset);
if (projectedExtension == null)
return null;
return projectedExtension.ShowCodeSurroundingsCommand (ConvertContext (completionContext));
}
public override MonoDevelop.Ide.CodeCompletion.ICompletionDataList ShowCodeTemplatesCommand (MonoDevelop.Ide.CodeCompletion.CodeCompletionContext completionContext)
{
var projectedExtension = GetExtensionAt (completionContext.TriggerOffset);
if (projectedExtension == null)
return null;
return projectedExtension.ShowCodeTemplatesCommand (ConvertContext (completionContext));
}
CodeCompletionContext ConvertContext (CodeCompletionContext completionContext)
{
var projection = GetProjectionAt (completionContext.TriggerOffset);
return ConvertContext (completionContext, projection);
}
static CodeCompletionContext ConvertContext (CodeCompletionContext completionContext, Projection projection)
{
int offset = completionContext.TriggerOffset;
int line = completionContext.TriggerLine;
int lineOffset = completionContext.TriggerLineOffset;
if (projection != null) {
foreach (var seg in projection.ProjectedSegments) {
if (seg.ContainsOriginal (offset)) {
offset = seg.FromOriginalToProjected (offset);
var loc = projection.ProjectedEditor.OffsetToLocation (offset);
line = loc.Line;
lineOffset = loc.Column - 1;
}
}
}
return new MonoDevelop.Ide.CodeCompletion.CodeCompletionContext {
TriggerOffset = offset,
TriggerLine = line,
TriggerLineOffset = lineOffset,
TriggerXCoord = completionContext.TriggerXCoord,
TriggerYCoord = completionContext.TriggerYCoord,
TriggerTextHeight = completionContext.TriggerTextHeight,
TriggerWordLength = completionContext.TriggerWordLength
};
}
static CodeCompletionContext ImportContext (CodeCompletionContext completionContext, Projection projection)
{
int offset = completionContext.TriggerOffset;
int line = completionContext.TriggerLine;
int lineOffset = completionContext.TriggerLineOffset;
if (projection != null) {
foreach (var seg in projection.ProjectedSegments) {
if (seg.ContainsProjected (offset)) {
offset = seg.FromProjectedToOriginal (offset);
var loc = projection.ProjectedEditor.OffsetToLocation (offset);
line = loc.Line;
lineOffset = loc.Column - 1;
break;
}
}
}
return new MonoDevelop.Ide.CodeCompletion.CodeCompletionContext {
TriggerOffset = offset,
TriggerLine = line,
TriggerLineOffset = lineOffset,
TriggerXCoord = completionContext.TriggerXCoord,
TriggerYCoord = completionContext.TriggerYCoord,
TriggerTextHeight = completionContext.TriggerTextHeight,
TriggerWordLength = completionContext.TriggerWordLength
};
}
internal protected override void OnCompletionContextChanged (object o, EventArgs a)
{
if (!IsActiveExtension ())
return;
var ext = GetExtensionAt (Editor.CaretOffset);
if (ext != null) {
ext.CurrentCompletionContext = ext.CompletionWidget.CurrentCodeCompletionContext;
}
}
internal protected override void HandlePositionChanged (object sender, EventArgs e)
{
if (!IsActiveExtension ())
return;
var ext = GetExtensionAt (Editor.CaretOffset);
if (ext != null)
ext.HandlePositionChanged (sender, e);
}
}
}
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