Fix #2298: Allow to change the DecompilerTextView's font size through scrolling.

ILSpy/Controls/CollapsiblePanel.cs

@@ -0,0 +1,209 @@
+// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
+// 
+// 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.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Input;
+using System.Windows.Media.Animation;
+using System.Windows.Threading;
+
+namespace ICSharpCode.ILSpy.Controls
+{
+	/// <summary>
+	/// Allows animated collapsing of the content of this panel.
+	/// </summary>
+	public class CollapsiblePanel : ContentControl
+	{
+		static CollapsiblePanel()
+		{
+			DefaultStyleKeyProperty.OverrideMetadata(typeof(CollapsiblePanel),
+													 new FrameworkPropertyMetadata(typeof(CollapsiblePanel)));
+			FocusableProperty.OverrideMetadata(typeof(CollapsiblePanel),
+											   new FrameworkPropertyMetadata(false));
+		}
+
+		public static readonly DependencyProperty IsCollapsedProperty = DependencyProperty.Register(
+			"IsCollapsed", typeof(bool), typeof(CollapsiblePanel),
+			new UIPropertyMetadata(false, new PropertyChangedCallback(OnIsCollapsedChanged)));
+
+		public bool IsCollapsed {
+			get { return (bool)GetValue(IsCollapsedProperty); }
+			set { SetValue(IsCollapsedProperty, value); }
+		}
+
+		public static readonly DependencyProperty CollapseOrientationProperty =
+			DependencyProperty.Register("CollapseOrientation", typeof(Orientation), typeof(CollapsiblePanel),
+										new FrameworkPropertyMetadata(Orientation.Vertical));
+
+		public Orientation CollapseOrientation {
+			get { return (Orientation)GetValue(CollapseOrientationProperty); }
+			set { SetValue(CollapseOrientationProperty, value); }
+		}
+
+		public static readonly DependencyProperty DurationProperty = DependencyProperty.Register(
+			"Duration", typeof(TimeSpan), typeof(CollapsiblePanel),
+			new UIPropertyMetadata(TimeSpan.FromMilliseconds(250)));
+
+		/// <summary>
+		/// The duration in milliseconds of the animation.
+		/// </summary>
+		public TimeSpan Duration {
+			get { return (TimeSpan)GetValue(DurationProperty); }
+			set { SetValue(DurationProperty, value); }
+		}
+
+		protected internal static readonly DependencyProperty AnimationProgressProperty = DependencyProperty.Register(
+			"AnimationProgress", typeof(double), typeof(CollapsiblePanel),
+			new FrameworkPropertyMetadata(1.0));
+
+		/// <summary>
+		/// Value between 0 and 1 specifying how far the animation currently is.
+		/// </summary>
+		protected internal double AnimationProgress {
+			get { return (double)GetValue(AnimationProgressProperty); }
+			set { SetValue(AnimationProgressProperty, value); }
+		}
+
+		protected internal static readonly DependencyProperty AnimationProgressXProperty = DependencyProperty.Register(
+			"AnimationProgressX", typeof(double), typeof(CollapsiblePanel),
+			new FrameworkPropertyMetadata(1.0));
+
+		/// <summary>
+		/// Value between 0 and 1 specifying how far the animation currently is.
+		/// </summary>
+		protected internal double AnimationProgressX {
+			get { return (double)GetValue(AnimationProgressXProperty); }
+			set { SetValue(AnimationProgressXProperty, value); }
+		}
+
+		protected internal static readonly DependencyProperty AnimationProgressYProperty = DependencyProperty.Register(
+			"AnimationProgressY", typeof(double), typeof(CollapsiblePanel),
+			new FrameworkPropertyMetadata(1.0));
+
+		/// <summary>
+		/// Value between 0 and 1 specifying how far the animation currently is.
+		/// </summary>
+		protected internal double AnimationProgressY {
+			get { return (double)GetValue(AnimationProgressYProperty); }
+			set { SetValue(AnimationProgressYProperty, value); }
+		}
+
+		static void OnIsCollapsedChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+		{
+			((CollapsiblePanel)d).SetupAnimation((bool)e.NewValue);
+		}
+
+		void SetupAnimation(bool isCollapsed)
+		{
+			if (this.IsLoaded)
+			{
+				// If the animation is already running, calculate remaining portion of the time
+				double currentProgress = AnimationProgress;
+				if (!isCollapsed)
+				{
+					currentProgress = 1.0 - currentProgress;
+				}
+
+				DoubleAnimation animation = new DoubleAnimation();
+				animation.To = isCollapsed ? 0.0 : 1.0;
+				animation.Duration = TimeSpan.FromSeconds(Duration.TotalSeconds * currentProgress);
+				animation.FillBehavior = FillBehavior.HoldEnd;
+
+				this.BeginAnimation(AnimationProgressProperty, animation);
+				if (CollapseOrientation == Orientation.Horizontal)
+				{
+					this.BeginAnimation(AnimationProgressXProperty, animation);
+					this.AnimationProgressY = 1.0;
+				}
+				else
+				{
+					this.AnimationProgressX = 1.0;
+					this.BeginAnimation(AnimationProgressYProperty, animation);
+				}
+			}
+			else
+			{
+				this.AnimationProgress = isCollapsed ? 0.0 : 1.0;
+				this.AnimationProgressX = (CollapseOrientation == Orientation.Horizontal) ? this.AnimationProgress : 1.0;
+				this.AnimationProgressY = (CollapseOrientation == Orientation.Vertical) ? this.AnimationProgress : 1.0;
+			}
+		}
+	}
+
+	sealed class CollapsiblePanelProgressToVisibilityConverter : IValueConverter
+	{
+		public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+		{
+			if (value is double)
+				return (double)value > 0 ? Visibility.Visible : Visibility.Collapsed;
+			else
+				return Visibility.Visible;
+		}
+
+		public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+		{
+			throw new NotImplementedException();
+		}
+	}
+
+	public class SelfCollapsingPanel : CollapsiblePanel
+	{
+		public static readonly DependencyProperty CanCollapseProperty =
+			DependencyProperty.Register("CanCollapse", typeof(bool), typeof(SelfCollapsingPanel),
+										new FrameworkPropertyMetadata(false, new PropertyChangedCallback(OnCanCollapseChanged)));
+
+		public bool CanCollapse {
+			get { return (bool)GetValue(CanCollapseProperty); }
+			set { SetValue(CanCollapseProperty, value); }
+		}
+
+		static void OnCanCollapseChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
+		{
+			SelfCollapsingPanel panel = (SelfCollapsingPanel)d;
+			if ((bool)e.NewValue)
+			{
+				if (!panel.HeldOpenByMouse)
+					panel.IsCollapsed = true;
+			}
+			else
+			{
+				panel.IsCollapsed = false;
+			}
+		}
+
+		bool HeldOpenByMouse {
+			get { return IsMouseOver || IsMouseCaptureWithin; }
+		}
+
+		protected override void OnMouseLeave(MouseEventArgs e)
+		{
+			base.OnMouseLeave(e);
+			if (CanCollapse && !HeldOpenByMouse)
+				IsCollapsed = true;
+		}
+
+		protected override void OnLostMouseCapture(MouseEventArgs e)
+		{
+			base.OnLostMouseCapture(e);
+			if (CanCollapse && !HeldOpenByMouse)
+				IsCollapsed = true;
+		}
+	}
+}

ILSpy/Controls/ZoomButtons.cs

@@ -0,0 +1,73 @@
+// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
+// 
+// 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.Collections.Generic;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+
+namespace ICSharpCode.ILSpy.Controls
+{
+	public class ZoomButtons : RangeBase
+	{
+		static ZoomButtons()
+		{
+			DefaultStyleKeyProperty.OverrideMetadata(typeof(ZoomButtons),
+													 new FrameworkPropertyMetadata(typeof(ZoomButtons)));
+		}
+
+		public override void OnApplyTemplate()
+		{
+			base.OnApplyTemplate();
+
+			var uxPlus = (ButtonBase)Template.FindName("uxPlus", this);
+			var uxMinus = (ButtonBase)Template.FindName("uxMinus", this);
+			var uxReset = (ButtonBase)Template.FindName("uxReset", this);
+
+			if (uxPlus != null)
+				uxPlus.Click += OnZoomInClick;
+			if (uxMinus != null)
+				uxMinus.Click += OnZoomOutClick;
+			if (uxReset != null)
+				uxReset.Click += OnResetClick;
+		}
+
+		const double ZoomFactor = 1.1;
+
+		void OnZoomInClick(object sender, EventArgs e)
+		{
+			SetCurrentValue(ValueProperty, ZoomScrollViewer.RoundToOneIfClose(this.Value * ZoomFactor));
+		}
+
+		void OnZoomOutClick(object sender, EventArgs e)
+		{
+			SetCurrentValue(ValueProperty, ZoomScrollViewer.RoundToOneIfClose(this.Value / ZoomFactor));
+		}
+
+		void OnResetClick(object sender, EventArgs e)
+		{
+			SetCurrentValue(ValueProperty, 1.0);
+		}
+	}
+}

ILSpy/Controls/ZoomScrollViewer.cs

@@ -0,0 +1,196 @@
+// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
+// 
+// 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.Collections.Generic;
+using System.Diagnostics;
+using System.Text;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Controls.Primitives;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+
+namespace ICSharpCode.ILSpy.Controls
+{
+	public class ZoomScrollViewer : ScrollViewer
+	{
+		static ZoomScrollViewer()
+		{
+			DefaultStyleKeyProperty.OverrideMetadata(typeof(ZoomScrollViewer),
+													 new FrameworkPropertyMetadata(typeof(ZoomScrollViewer)));
+		}
+
+		public static readonly DependencyProperty CurrentZoomProperty =
+			DependencyProperty.Register("CurrentZoom", typeof(double), typeof(ZoomScrollViewer),
+										new FrameworkPropertyMetadata(1.0, FrameworkPropertyMetadataOptions.BindsTwoWayByDefault, CalculateZoomButtonCollapsed, CoerceZoom));
+
+		public double CurrentZoom {
+			get { return (double)GetValue(CurrentZoomProperty); }
+			set { SetValue(CurrentZoomProperty, value); }
+		}
+
+		static object CoerceZoom(DependencyObject d, object baseValue)
+		{
+			var zoom = (double)baseValue;
+			ZoomScrollViewer sv = (ZoomScrollViewer)d;
+			return Math.Max(sv.MinimumZoom, Math.Min(sv.MaximumZoom, zoom));
+		}
+
+		public static readonly DependencyProperty MinimumZoomProperty =
+			DependencyProperty.Register("MinimumZoom", typeof(double), typeof(ZoomScrollViewer),
+										new FrameworkPropertyMetadata(0.2));
+
+		public double MinimumZoom {
+			get { return (double)GetValue(MinimumZoomProperty); }
+			set { SetValue(MinimumZoomProperty, value); }
+		}
+
+		public static readonly DependencyProperty MaximumZoomProperty =
+			DependencyProperty.Register("MaximumZoom", typeof(double), typeof(ZoomScrollViewer),
+										new FrameworkPropertyMetadata(5.0));
+
+		public double MaximumZoom {
+			get { return (double)GetValue(MaximumZoomProperty); }
+			set { SetValue(MaximumZoomProperty, value); }
+		}
+
+		public static readonly DependencyProperty MouseWheelZoomProperty =
+			DependencyProperty.Register("MouseWheelZoom", typeof(bool), typeof(ZoomScrollViewer),
+										new FrameworkPropertyMetadata(true));
+
+		public bool MouseWheelZoom {
+			get { return (bool)GetValue(MouseWheelZoomProperty); }
+			set { SetValue(MouseWheelZoomProperty, value); }
+		}
+
+		public static readonly DependencyProperty AlwaysShowZoomButtonsProperty =
+			DependencyProperty.Register("AlwaysShowZoomButtons", typeof(bool), typeof(ZoomScrollViewer),
+										new FrameworkPropertyMetadata(false, CalculateZoomButtonCollapsed));
+
+		public bool AlwaysShowZoomButtons {
+			get { return (bool)GetValue(AlwaysShowZoomButtonsProperty); }
+			set { SetValue(AlwaysShowZoomButtonsProperty, value); }
+		}
+
+		static readonly DependencyPropertyKey ComputedZoomButtonCollapsedPropertyKey =
+			DependencyProperty.RegisterReadOnly("ComputedZoomButtonCollapsed", typeof(bool), typeof(ZoomScrollViewer),
+												new FrameworkPropertyMetadata(true));
+
+		public static readonly DependencyProperty ComputedZoomButtonCollapsedProperty = ComputedZoomButtonCollapsedPropertyKey.DependencyProperty;
+
+		public bool ComputedZoomButtonCollapsed {
+			get { return (bool)GetValue(ComputedZoomButtonCollapsedProperty); }
+			private set { SetValue(ComputedZoomButtonCollapsedPropertyKey, value); }
+		}
+
+		static void CalculateZoomButtonCollapsed(DependencyObject d, DependencyPropertyChangedEventArgs e)
+		{
+			ZoomScrollViewer z = d as ZoomScrollViewer;
+			if (z != null)
+				z.ComputedZoomButtonCollapsed = (z.AlwaysShowZoomButtons == false) && (z.CurrentZoom == 1.0);
+		}
+
+		protected override void OnMouseWheel(MouseWheelEventArgs e)
+		{
+			if (!e.Handled && Keyboard.Modifiers == ModifierKeys.Control && MouseWheelZoom)
+			{
+				double oldZoom = CurrentZoom;
+				double newZoom = RoundToOneIfClose(CurrentZoom * Math.Pow(1.001, e.Delta));
+				newZoom = Math.Max(this.MinimumZoom, Math.Min(this.MaximumZoom, newZoom));
+
+				// adjust scroll position so that mouse stays over the same virtual coordinate
+				ContentPresenter presenter = Template.FindName("PART_Presenter", this) as ContentPresenter;
+				Vector relMousePos;
+				if (presenter != null)
+				{
+					Point mousePos = e.GetPosition(presenter);
+					relMousePos = new Vector(mousePos.X / presenter.ActualWidth, mousePos.Y / presenter.ActualHeight);
+				}
+				else
+				{
+					relMousePos = new Vector(0.5, 0.5);
+				}
+
+				Point scrollOffset = new Point(this.HorizontalOffset, this.VerticalOffset);
+				Vector oldHalfViewport = new Vector(this.ViewportWidth / 2, this.ViewportHeight / 2);
+				Vector newHalfViewport = oldHalfViewport / newZoom * oldZoom;
+				Point oldCenter = scrollOffset + oldHalfViewport;
+				Point virtualMousePos = scrollOffset + new Vector(relMousePos.X * this.ViewportWidth, relMousePos.Y * this.ViewportHeight);
+
+				// As newCenter, we want to choose a point between oldCenter and virtualMousePos. The more we zoom in, the closer
+				// to virtualMousePos. We'll create the line x = oldCenter + lambda * (virtualMousePos-oldCenter).
+				// On this line, we need to choose lambda between -1 and 1:
+				// -1 = zoomed out completely
+				//  0 = zoom unchanged
+				// +1 = zoomed in completely
+				// But the zoom factor (newZoom/oldZoom) we have is in the range [0,+Infinity].
+
+				// Basically, I just played around until I found a function that maps this to [-1,1] and works well.
+				// "f" is squared because otherwise the mouse simply stays over virtualMousePos, but I wanted virtualMousePos
+				// to move towards the middle -> squaring f causes lambda to be closer to 1, giving virtualMousePos more weight
+				// then oldCenter.
+
+				double f = Math.Min(newZoom, oldZoom) / Math.Max(newZoom, oldZoom);
+				double lambda = 1 - f * f;
+				if (oldZoom > newZoom)
+					lambda = -lambda;
+
+				Debug.Print("old: " + oldZoom + ", new: " + newZoom);
+
+				Point newCenter = oldCenter + lambda * (virtualMousePos - oldCenter);
+				scrollOffset = newCenter - newHalfViewport;
+
+				SetCurrentValue(CurrentZoomProperty, newZoom);
+
+				this.ScrollToHorizontalOffset(scrollOffset.X);
+				this.ScrollToVerticalOffset(scrollOffset.Y);
+
+				e.Handled = true;
+			}
+			base.OnMouseWheel(e);
+		}
+
+		internal static double RoundToOneIfClose(double val)
+		{
+			if (Math.Abs(val - 1.0) < 0.001)
+				return 1.0;
+			else
+				return val;
+		}
+	}
+
+	sealed class IsNormalZoomConverter : IValueConverter
+	{
+		public static readonly IsNormalZoomConverter Instance = new IsNormalZoomConverter();
+
+		public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+		{
+			if (parameter is bool && (bool)parameter)
+				return true;
+			return ((double)value) == 1.0;
+		}
+
+		public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+		{
+			throw new NotImplementedException();
+		}
+	}
+}

ILSpy/Controls/ZoomScrollViewer.xaml

@@ -0,0 +1,128 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+	xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+	xmlns:Controls="clr-namespace:ICSharpCode.ILSpy.Controls">
+	
+	<Style TargetType="{x:Type Controls:ZoomScrollViewer}">
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="{x:Type Controls:ZoomScrollViewer}">
+					<Grid Background="{TemplateBinding Panel.Background}">
+						<Grid.ColumnDefinitions>
+							<ColumnDefinition Width="Auto" />
+							<ColumnDefinition Width="*" />
+							<ColumnDefinition Width="Auto" />
+						</Grid.ColumnDefinitions>
+						<Grid.RowDefinitions>
+							<RowDefinition Height="*" />
+							<RowDefinition Height="Auto" />
+						</Grid.RowDefinitions>
+						<Controls:SelfCollapsingPanel Grid.Column="0" Grid.Row="1" CollapseOrientation="Horizontal" CanCollapse="{Binding Path=ComputedZoomButtonCollapsed, Mode=OneWay, RelativeSource={RelativeSource Mode=TemplatedParent}}">
+							<Controls:ZoomButtons x:Name="zoomButtons" Value="{Binding Path=CurrentZoom, RelativeSource={RelativeSource Mode=TemplatedParent}}" Minimum="{TemplateBinding MinimumZoom}" Maximum="{TemplateBinding MaximumZoom}" />
+						</Controls:SelfCollapsingPanel>
+						<Rectangle Grid.Column="2" Grid.Row="1" Fill="{DynamicResource {x:Static SystemColors.ControlBrushKey}}" />
+						<ScrollContentPresenter Name="PART_Presenter" Grid.Column="0" Grid.ColumnSpan="2" Grid.Row="0" Margin="{TemplateBinding Control.Padding}" Content="{TemplateBinding ContentControl.Content}" ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}" CanContentScroll="{TemplateBinding ScrollViewer.CanContentScroll}">
+							<ScrollContentPresenter.LayoutTransform>
+								<ScaleTransform ScaleX="{Binding Path=CurrentZoom, RelativeSource={RelativeSource Mode=TemplatedParent}}" ScaleY="{Binding Path=CurrentZoom, RelativeSource={RelativeSource Mode=TemplatedParent}}"/>
+							</ScrollContentPresenter.LayoutTransform>
+						</ScrollContentPresenter>
+						<ScrollBar Name="PART_VerticalScrollBar" Grid.Column="2" Grid.Row="0" Minimum="0" Maximum="{TemplateBinding ScrollableHeight}" ViewportSize="{TemplateBinding ViewportHeight}" Value="{TemplateBinding VerticalOffset}" Visibility="{TemplateBinding ComputedVerticalScrollBarVisibility}" />
+						<ScrollBar Name="PART_HorizontalScrollBar" Orientation="Horizontal" Grid.Column="1" Grid.Row="1" Minimum="0" Maximum="{TemplateBinding ScrollableWidth}" ViewportSize="{TemplateBinding ViewportWidth}" Value="{TemplateBinding HorizontalOffset}" Visibility="{TemplateBinding ComputedHorizontalScrollBarVisibility}" />
+					</Grid>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
+
+	<!-- Template for CollapsiblePanel -->
+	<Style TargetType="{x:Type Controls:CollapsiblePanel}">
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="Controls:CollapsiblePanel">
+					<ControlTemplate.Resources>
+						<Controls:CollapsiblePanelProgressToVisibilityConverter x:Key="visibilityConverter"/>
+					</ControlTemplate.Resources>
+					<Border
+						BorderThickness="{TemplateBinding Border.BorderThickness}"
+						BorderBrush="{TemplateBinding Border.BorderBrush}"
+						Background="{TemplateBinding Panel.Background}"
+						SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}"
+						Name="PART_Border"
+						Visibility="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=AnimationProgress, Converter={StaticResource visibilityConverter}}"
+					>
+						<Border.LayoutTransform>
+							<ScaleTransform ScaleX="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=AnimationProgressX}"
+							                ScaleY="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=AnimationProgressY}"/>
+						</Border.LayoutTransform>
+						<ContentPresenter
+							Margin="{TemplateBinding Control.Padding}"
+							Content="{TemplateBinding ContentControl.Content}"
+							ContentTemplate="{TemplateBinding ContentControl.ContentTemplate}"
+							ContentStringFormat="{TemplateBinding ContentControl.ContentStringFormat}"
+							HorizontalAlignment="{TemplateBinding Control.HorizontalContentAlignment}"
+							VerticalAlignment="{TemplateBinding Control.VerticalContentAlignment}"
+							SnapsToDevicePixels="{TemplateBinding UIElement.SnapsToDevicePixels}" />
+					</Border>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
+
+	<Style x:Key="ZoomButtonStyle"
+	       TargetType="RepeatButton">
+		<Setter Property="Delay" Value="0" />
+		<Setter Property="Focusable" Value="False" />
+		<Setter Property="Opacity" Value="0.5" />
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="RepeatButton">
+					<ContentPresenter />
+					<ControlTemplate.Triggers>
+						<Trigger Property="IsMouseOver" Value="True">
+							<Setter Property="Opacity" Value="1" />
+						</Trigger>
+					</ControlTemplate.Triggers>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
+	
+	<Style TargetType="{x:Type Controls:ZoomButtons}">
+		<Setter Property="Minimum" Value="0.2"/>
+		<Setter Property="Maximum" Value="10"/>
+		<Setter Property="Value" Value="1"/>
+		<Setter Property="Template">
+			<Setter.Value>
+				<ControlTemplate TargetType="{x:Type Controls:ZoomButtons}">
+					<Border Background="{TemplateBinding Background}"
+					        BorderBrush="{TemplateBinding BorderBrush}"
+					        BorderThickness="{TemplateBinding BorderThickness}">
+						<StackPanel Orientation="Horizontal"
+						            Background="#3000">
+							<RepeatButton x:Name="uxPlus"
+							              Width="16" Height="16" Padding="0" BorderThickness="0"
+							              Style="{StaticResource ZoomButtonStyle}">
+								<Image Source="{Controls:XamlResource Images/ZoomIn}"
+								       Stretch="Uniform"/>
+							</RepeatButton>
+							<RepeatButton x:Name="uxMinus"
+							              Width="16" Height="16" Padding="0" BorderThickness="0"
+							              Style="{StaticResource ZoomButtonStyle}">
+								<Image Source="{Controls:XamlResource Images/ZoomOut}"
+								       Stretch="Uniform" />
+							</RepeatButton>
+							<RepeatButton x:Name="uxReset"
+							              Width="16" Height="16" Padding="0" BorderThickness="0"
+							              Style="{StaticResource ZoomButtonStyle}">
+								<Border Background="#5000">
+									<TextBlock Foreground="White"
+									           HorizontalAlignment="Center"
+									           VerticalAlignment="Center">1</TextBlock>
+								</Border>
+							</RepeatButton>
+						</StackPanel>
+					</Border>
+				</ControlTemplate>
+			</Setter.Value>
+		</Setter>
+	</Style>
+</ResourceDictionary>

ILSpy/Images/ZoomIn.svg

@@ -0,0 +1,65 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   viewBox="0 0 16 16"
+   version="1.1"
+   id="svg8"
+   sodipodi:docname="ZoomIn.svg"
+   inkscape:version="1.1 (c68e22c387, 2021-05-23)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs12" />
+  <sodipodi:namedview
+     id="namedview10"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="52"
+     inkscape:cx="8"
+     inkscape:cy="7.7211538"
+     inkscape:window-width="1920"
+     inkscape:window-height="1017"
+     inkscape:window-x="2552"
+     inkscape:window-y="605"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg8" />
+  <style
+     id="style2">.icon-canvas-transparent{opacity:0;fill:#f6f6f6}.icon-vs-out{fill:#f6f6f6}.icon-vs-bg{fill:#424242}.icon-vs-fg{fill:#f0eff1}</style>
+  <path
+     class="icon-canvas-transparent"
+     d="M16 16H0V0h16v16z"
+     id="canvas" />
+  <path
+     class="icon-vs-out"
+     d="M16 5.833a5.84 5.84 0 0 1-5.833 5.833 5.688 5.688 0 0 1-2.913-.8L2.56 15.559a1.494 1.494 0 0 1-2.121.002 1.501 1.501 0 0 1 0-2.121l4.694-4.695a5.69 5.69 0 0 1-.8-2.911C4.333 2.617 6.95 0 10.167 0S16 2.617 16 5.833z"
+     id="outline" />
+  <path
+     class="icon-vs-fg"
+     d="M14 5.833a3.837 3.837 0 0 1-3.833 3.833c-2.114 0-3.833-1.72-3.833-3.833S8.053 2 10.167 2A3.838 3.838 0 0 1 14 5.833z"
+     id="iconFg" />
+  <path
+     class="icon-vs-bg"
+     d="M10.167 1a4.84 4.84 0 0 0-4.834 4.833c0 1.152.422 2.197 1.097 3.028l-5.284 5.285a.5.5 0 0 0 .708.708l5.284-5.285c.832.676 1.877 1.098 3.029 1.098 2.665 0 4.833-2.168 4.833-4.833S12.832 1 10.167 1zm0 8.667c-2.114 0-3.833-1.72-3.833-3.833S8.053 2 10.167 2C12.28 2 14 3.72 14 5.833s-1.72 3.834-3.833 3.834z"
+     id="iconBg" />
+  <rect
+     style="fill:#424242;fill-opacity:1"
+     id="rect884"
+     width="4.6153846"
+     height="0.88461536"
+     x="7.8649998"
+     y="5.3461561" />
+  <rect
+     style="fill:#424242;fill-opacity:1"
+     id="rect4051"
+     width="4.6153846"
+     height="0.88461536"
+     x="3.4807715"
+     y="-10.615"
+     transform="rotate(90)" />
+</svg>

ILSpy/Images/ZoomIn.xaml

@@ -0,0 +1,27 @@
+<DrawingGroup xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+  <DrawingGroup.Transform>
+    <TranslateTransform X="0" Y="10.615" />
+  </DrawingGroup.Transform>
+  <DrawingGroup.Children>
+    <GeometryDrawing Geometry="F1 M16,16z M0,0z M16,16L0,16 0,0 16,0 16,16z">
+    <GeometryDrawing.Brush>
+      <SolidColorBrush Color="#FFF6F6F6" Opacity="0" />
+    </GeometryDrawing.Brush>
+  </GeometryDrawing>
+  <GeometryDrawing Brush="#FFF6F6F6" Geometry="F1 M16,16z M0,0z M16,5.833A5.84,5.84,0,0,1,10.167,11.666A5.688,5.688,0,0,1,7.254,10.866L2.56,15.559A1.494,1.494,0,0,1,0.439,15.561A1.501,1.501,0,0,1,0.439,13.44L5.133,8.745A5.69,5.69,0,0,1,4.333,5.834C4.333,2.617 6.95,0 10.167,0 13.384,0 16,2.617 16,5.833z" />
+  <GeometryDrawing Brush="#FFF0EFF1" Geometry="F1 M16,16z M0,0z M14,5.833A3.837,3.837,0,0,1,10.167,9.666C8.053,9.666 6.334,7.946 6.334,5.833 6.334,3.72 8.053,2 10.167,2A3.838,3.838,0,0,1,14,5.833z" />
+  <GeometryDrawing Brush="#FF424242" Geometry="F1 M16,16z M0,0z M10.167,1A4.84,4.84,0,0,0,5.333,5.833C5.333,6.985,5.755,8.03,6.43,8.861L1.146,14.146A0.5,0.5,0,0,0,1.854,14.854L7.138,9.569C7.97,10.245 9.015,10.667 10.167,10.667 12.832,10.667 15,8.499 15,5.834 15,3.169 12.832,1 10.167,1z M10.167,9.667C8.053,9.667 6.334,7.947 6.334,5.834 6.334,3.721 8.053,2 10.167,2 12.28,2 14,3.72 14,5.833 14,7.946 12.28,9.667 10.167,9.667z" />
+  <GeometryDrawing Brush="#FF424242">
+    <GeometryDrawing.Geometry>
+      <RectangleGeometry RadiusX="0" RadiusY="0" Rect="7.865,5.3462,4.6154,0.8846" />
+    </GeometryDrawing.Geometry>
+  </GeometryDrawing>
+  <DrawingGroup Transform="6.12303176911189E-17,1,-1,6.12303176911189E-17,0,0">
+    <GeometryDrawing Brush="#FF424242">
+      <GeometryDrawing.Geometry>
+        <RectangleGeometry RadiusX="0" RadiusY="0" Rect="3.4808,-10.615,4.6154,0.8846" />
+      </GeometryDrawing.Geometry>
+    </GeometryDrawing>
+  </DrawingGroup>
+  </DrawingGroup.Children>
+</DrawingGroup>

ILSpy/Images/ZoomOut.svg

@@ -0,0 +1,57 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<svg
+   viewBox="0 0 16 16"
+   version="1.1"
+   id="svg8"
+   sodipodi:docname="ZoomOut.svg"
+   inkscape:version="1.1 (c68e22c387, 2021-05-23)"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:svg="http://www.w3.org/2000/svg">
+  <defs
+     id="defs12" />
+  <sodipodi:namedview
+     id="namedview10"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageshadow="2"
+     inkscape:pageopacity="0.0"
+     inkscape:pagecheckerboard="0"
+     showgrid="false"
+     inkscape:zoom="52"
+     inkscape:cx="8"
+     inkscape:cy="7.7211538"
+     inkscape:window-width="1920"
+     inkscape:window-height="1017"
+     inkscape:window-x="2552"
+     inkscape:window-y="605"
+     inkscape:window-maximized="1"
+     inkscape:current-layer="svg8" />
+  <style
+     id="style2">.icon-canvas-transparent{opacity:0;fill:#f6f6f6}.icon-vs-out{fill:#f6f6f6}.icon-vs-bg{fill:#424242}.icon-vs-fg{fill:#f0eff1}</style>
+  <path
+     class="icon-canvas-transparent"
+     d="M16 16H0V0h16v16z"
+     id="canvas" />
+  <path
+     class="icon-vs-out"
+     d="M16 5.833a5.84 5.84 0 0 1-5.833 5.833 5.688 5.688 0 0 1-2.913-.8L2.56 15.559a1.494 1.494 0 0 1-2.121.002 1.501 1.501 0 0 1 0-2.121l4.694-4.695a5.69 5.69 0 0 1-.8-2.911C4.333 2.617 6.95 0 10.167 0S16 2.617 16 5.833z"
+     id="outline" />
+  <path
+     class="icon-vs-fg"
+     d="M14 5.833a3.837 3.837 0 0 1-3.833 3.833c-2.114 0-3.833-1.72-3.833-3.833S8.053 2 10.167 2A3.838 3.838 0 0 1 14 5.833z"
+     id="iconFg" />
+  <path
+     class="icon-vs-bg"
+     d="M10.167 1a4.84 4.84 0 0 0-4.834 4.833c0 1.152.422 2.197 1.097 3.028l-5.284 5.285a.5.5 0 0 0 .708.708l5.284-5.285c.832.676 1.877 1.098 3.029 1.098 2.665 0 4.833-2.168 4.833-4.833S12.832 1 10.167 1zm0 8.667c-2.114 0-3.833-1.72-3.833-3.833S8.053 2 10.167 2C12.28 2 14 3.72 14 5.833s-1.72 3.834-3.833 3.834z"
+     id="iconBg" />
+  <rect
+     style="fill:#424242;fill-opacity:1"
+     id="rect884"
+     width="4.6153846"
+     height="0.88461536"
+     x="7.8649998"
+     y="5.3461561" />
+</svg>

ILSpy/Images/ZoomOut.xaml

@@ -0,0 +1,20 @@
+<DrawingGroup xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation">
+  <DrawingGroup.Transform>
+    <TranslateTransform X="0" Y="10.615" />
+  </DrawingGroup.Transform>
+  <DrawingGroup.Children>
+  <GeometryDrawing Geometry="F1 M16,16z M0,0z M16,16L0,16 0,0 16,0 16,16z">
+    <GeometryDrawing.Brush>
+      <SolidColorBrush Color="#FFF6F6F6" Opacity="0" />
+    </GeometryDrawing.Brush>
+  </GeometryDrawing>
+  <GeometryDrawing Brush="#FFF6F6F6" Geometry="F1 M16,16z M0,0z M16,5.833A5.84,5.84,0,0,1,10.167,11.666A5.688,5.688,0,0,1,7.254,10.866L2.56,15.559A1.494,1.494,0,0,1,0.439,15.561A1.501,1.501,0,0,1,0.439,13.44L5.133,8.745A5.69,5.69,0,0,1,4.333,5.834C4.333,2.617 6.95,0 10.167,0 13.384,0 16,2.617 16,5.833z" />
+  <GeometryDrawing Brush="#FFF0EFF1" Geometry="F1 M16,16z M0,0z M14,5.833A3.837,3.837,0,0,1,10.167,9.666C8.053,9.666 6.334,7.946 6.334,5.833 6.334,3.72 8.053,2 10.167,2A3.838,3.838,0,0,1,14,5.833z" />
+  <GeometryDrawing Brush="#FF424242" Geometry="F1 M16,16z M0,0z M10.167,1A4.84,4.84,0,0,0,5.333,5.833C5.333,6.985,5.755,8.03,6.43,8.861L1.146,14.146A0.5,0.5,0,0,0,1.854,14.854L7.138,9.569C7.97,10.245 9.015,10.667 10.167,10.667 12.832,10.667 15,8.499 15,5.834 15,3.169 12.832,1 10.167,1z M10.167,9.667C8.053,9.667 6.334,7.947 6.334,5.834 6.334,3.721 8.053,2 10.167,2 12.28,2 14,3.72 14,5.833 14,7.946 12.28,9.667 10.167,9.667z" />
+  <GeometryDrawing Brush="#FF424242">
+    <GeometryDrawing.Geometry>
+      <RectangleGeometry RadiusX="0" RadiusY="0" Rect="7.865,5.3462,4.6154,0.8846" />
+    </GeometryDrawing.Geometry>
+  </GeometryDrawing>
+  </DrawingGroup.Children>
+</DrawingGroup>

ILSpy/TextView/DecompilerTextView.xaml

@@ -2,9 +2,11 @@
              xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
 			 xmlns:properties="clr-namespace:ICSharpCode.ILSpy.Properties"
-             xmlns:ae="clr-namespace:ICSharpCode.AvalonEdit;assembly=ICSharpCode.AvalonEdit"
+			 xmlns:controls="clr-namespace:ICSharpCode.ILSpy.Controls"
-             xmlns:folding="clr-namespace:ICSharpCode.AvalonEdit.Folding;assembly=ICSharpCode.AvalonEdit"
+			 xmlns:local="clr-namespace:ICSharpCode.ILSpy.TextView"
-             xmlns:styles="urn:TomsToolbox.Wpf.Styles">
+			 xmlns:ae="clr-namespace:ICSharpCode.AvalonEdit;assembly=ICSharpCode.AvalonEdit"
+			 xmlns:folding="clr-namespace:ICSharpCode.AvalonEdit.Folding;assembly=ICSharpCode.AvalonEdit"
+			 xmlns:styles="urn:TomsToolbox.Wpf.Styles">
 	<UserControl.Resources>
 		<BooleanToVisibilityConverter x:Key="boolToVisibility" />
 		<SolidColorBrush x:Key="waitAdornerBackgoundBrush" Color="{DynamicResource {x:Static SystemColors.WindowColorKey}}" Opacity=".75"/>
@@ -47,6 +49,33 @@
 							</Style.Triggers>
 						</Style>
 					</ae:TextEditor.Resources>
+					<ae:TextEditor.Template>
+						<ControlTemplate TargetType="{x:Type ae:TextEditor}">
+							<controls:ZoomScrollViewer
+								Focusable="False"
+								x:Name="PART_ScrollViewer"
+								MouseWheelZoom="True"
+								CanContentScroll="True"
+								VerticalScrollBarVisibility="Visible"
+								HorizontalScrollBarVisibility="Visible"
+								Content="{Binding RelativeSource={RelativeSource TemplatedParent}, Path=TextArea}"
+								VerticalContentAlignment="Top"
+								HorizontalContentAlignment="Left"
+								Background="{TemplateBinding Background}"
+								Padding="{TemplateBinding Padding}"
+								BorderBrush="{TemplateBinding BorderBrush}"
+								BorderThickness="{TemplateBinding BorderThickness}" 
+								TextOptions.TextFormattingMode="{Binding CurrentZoom, ElementName=PART_ScrollViewer, Converter={x:Static local:ZoomLevelToTextFormattingModeConverter.Instance}}" />
+							<ControlTemplate.Triggers>
+								<Trigger Property="WordWrap"
+									Value="True">
+									<Setter TargetName="PART_ScrollViewer"
+										Property="HorizontalScrollBarVisibility"
+										Value="Disabled" />
+								</Trigger>
+							</ControlTemplate.Triggers>
+						</ControlTemplate>
+					</ae:TextEditor.Template>
 				</ae:TextEditor>
 				<Border Name="waitAdorner" Background="{StaticResource waitAdornerBackgoundBrush}" Visibility="Collapsed">
 					<StackPanel HorizontalAlignment="Center" VerticalAlignment="Center">

ILSpy/TextView/ZoomLevelToTextFormattingModeConverter.cs

@@ -0,0 +1,38 @@
+// Copyright (c) 2014 AlphaSierraPapa for the SharpDevelop Team
+// 
+// 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.Windows.Data;
+using System.Windows.Media;
+
+namespace ICSharpCode.ILSpy.TextView
+{
+	sealed class ZoomLevelToTextFormattingModeConverter : IValueConverter
+	{
+		public static readonly ZoomLevelToTextFormattingModeConverter Instance = new ZoomLevelToTextFormattingModeConverter();
+
+		public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+		{
+			return ((double)value) == 1.0 ? TextFormattingMode.Display : (object)TextFormattingMode.Ideal;
+		}
+
+		public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)
+		{
+			throw new NotSupportedException();
+		}
+	}
+}

ILSpy/Themes/generic.xaml

@@ -4,6 +4,7 @@
 	xmlns:themes="clr-namespace:ICSharpCode.ILSpy.Themes">
 	<ResourceDictionary.MergedDictionaries>
 		<ResourceDictionary Source="../Controls/SearchBoxStyle.xaml" />
+		<ResourceDictionary Source="../Controls/ZoomScrollViewer.xaml" />
 	</ResourceDictionary.MergedDictionaries>
 	
 	<!-- SortableGridViewColumn.