ClaudeCodeExtension/UI/ChatTranscriptView.xaml.cs at master · dliedke/ClaudeCodeExtension · GitHub

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/* *******************************************************************************************************************

* Application: ClaudeCodeExtension

* Autor: Daniel Carvalho Liedke / Claude Code

* Usage and reproduction in any manner whatsoever without the written permission of Daniel Carvalho Liedke is strictly forbidden.

* Purpose: Chat transcript displayed in place of the embedded terminal when native mode is on

* *******************************************************************************************************************/

using System;

using System.Collections.Generic;

using System.Collections.ObjectModel;

using System.Collections.Specialized;

using System.ComponentModel;

using System.Globalization;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Controls.Primitives;

using System.Windows.Data;

using System.Windows.Media;

using Microsoft.VisualStudio.PlatformUI;

using Microsoft.VisualStudio.Shell;

namespace ClaudeCodeVS.UI

{

/// <summary>

/// The conversation view for native mode. Owns only presentation: the parent control feeds it

/// messages and it never talks to an agent session directly.

/// </summary>

public partial class ChatTranscriptView : UserControl

{

// 2 device-independent pixels of slack: the scroll offset rarely lands exactly on the extent,

// and requiring equality would leave auto-scroll permanently off.

private const double BottomTolerance = 2.0;

private const double MinZoom = 0.6;

private const double MaxZoom = 2.5;

private const double ZoomStep = 0.1;

private const double MinComposerHeight = 46;

private const double MaxComposerHeight = 400;

private ChatMessageViewModel _trackedMessage;

private bool _autoScroll = true;

private bool _suppressEffortEvent;

private int _effortIndexOnOpen;

private int _effortIndex;

private string[] _effortStopLabels;

private string _effortTitle = "Effort";

private System.Windows.Threading.DispatcherTimer _activityTimer;

private DateTime _activityStartedUtc;

private DateTime _lastVerbChangeUtc;

private int _spinnerFrame;

private int _verbIndex;

/// <summary>Fixed caption, or empty while the rotating verbs are in charge.</summary>

private string _activityLabel = string.Empty;

private string _activityDetail = string.Empty;

public ChatTranscriptView()

{

InitializeComponent();

Messages = new ObservableCollection<ChatMessageViewModel>();

Messages.CollectionChanged += OnMessagesChanged;

MessagesList.ItemsSource = Messages;

Loaded += delegate { ApplyLinkAccentForTheme(); };

Unloaded += delegate { VSColorTheme.ThemeChanged -= OnVSColorThemeChanged; };

VSColorTheme.ThemeChanged += OnVSColorThemeChanged;

}

/// <summary>

/// The link/quote-border accent (<c>ChatLinkAccentBrush</c>) is a fixed blue rather than a VS

/// theme brush — no VS key reads well as link text in both themes — so it needs its own

/// light/dark swap instead of the automatic one <c>DynamicResource</c> gives real theme keys.

/// Written into <see cref="FrameworkElement.Resources"/> so every <see cref="MarkdownBlock"/>

/// row picks it up live via its style's <c>DynamicResource</c> setter, current rows and future

/// ones alike.

/// </summary>

private void ApplyLinkAccentForTheme()

{

bool isDarkTheme = true;

try

{

var windowBrush = (SolidColorBrush)FindResource(VsBrushes.WindowKey);

Color color = windowBrush.Color;

double luminance = (0.299 * color.R + 0.587 * color.G + 0.114 * color.B) / 255;

isDarkTheme = luminance < 0.5;

}

catch (Exception ex)

{

System.Diagnostics.Debug.WriteLine($"Chat link accent theme detection failed: {ex.Message}");

}

Resources["ChatLinkAccentBrush"] = new SolidColorBrush(

isDarkTheme ? Color.FromRgb(0x5B, 0xB4, 0xFF) : Color.FromRgb(0x1C, 0x8A, 0xE0));

}

private void OnVSColorThemeChanged(ThemeChangedEventArgs e)

{

ApplyLinkAccentForTheme();

}

/// <summary>Transcript rows, oldest first.</summary>

public ObservableCollection<ChatMessageViewModel> Messages { get; }

/// <summary>Raised when the user clicks Stop. The parent control aborts the turn.</summary>

public event EventHandler StopRequested;

/// <summary>Raised when the composer's text should be sent as a prompt.</summary>

public event EventHandler SendRequested;

/// <summary>Files dropped onto the composer, so drag-and-drop attaches like the prompt box does.</summary>

public event EventHandler<string[]> FilesDropped;

/// <summary>

/// Raised by one of the four selector buttons. The sender is the button, so the parent can

/// anchor its context menu to it; the argument says which selector was clicked.

/// <para>

/// Effort is the exception: it opens the built-in pill slider popup and reports through

/// <see cref="EffortChanged"/> instead, so it never reaches this event.

/// </para>

/// </summary>

public event EventHandler<ChatSelector> SelectorClicked;

/// <summary>

/// Raised once the user is done with the effort slider — when the popup closes — carrying the

/// stop it was left on. Deliberately not raised per stop: applying a level restarts the agent,

/// so reporting each stop the user passes through would restart it once per stop and lock the

/// chat up while they are still choosing.

/// </summary>

public event EventHandler<int> EffortChanged;

/// <summary>Raised by the ↻ button: clear and restart the current session.</summary>

public event EventHandler ClearChatRequested;

/// <summary>Raised by the ✚ button: open a new parallel chat session.</summary>

public event EventHandler NewChatRequested;

/// <summary>Raised by the ✎ button: rename the session currently in the tab.</summary>

public event EventHandler RenameSessionRequested;

/// <summary>

/// Raised by the 📎 button. The parent owns the file dialog and the attachment list, matching

/// the panel's own AttachDropdownButton — drag-and-drop and Ctrl+V paste already attach files

/// and images, but a picker is still the only way to browse to a file outside the editor.

/// </summary>

public event EventHandler AttachRequested;

/// <summary>

/// Raised by the ⚙/☰/⚡ mirror buttons. The sender is this view, so the parent can anchor the

/// panel's actual context menu (there is no separate copy of its contents) to whichever button

/// was clicked via <see cref="GetConfigMenuAnchor"/>.

/// </summary>

public event EventHandler<ChatConfigMenu> ConfigMenuClicked;

/// <summary>

/// Raised by one of the mirrored promoted-toolbar buttons (<see cref="SetPromotedButtons"/>).

/// The argument is the same id passed into that call, so the parent can map it back to the

/// toolbar feature and invoke the same click handler the panel button does.

/// </summary>

public event EventHandler<string> PromotedButtonClicked;

/// <summary>Raised when Ctrl+Scroll changes the zoom, so the parent can persist it.</summary>

public event EventHandler<double> ZoomChanged;

/// <summary>

/// Raised when a link rendered inside the transcript's markdown is clicked. The parent decides

/// what the URL means — a web address opens in the browser, a bare path opens in the editor.

/// </summary>

public event EventHandler<string> LinkClicked;

private void MarkdownBlock_LinkClicked(object sender, string url)

{

LinkClicked?.Invoke(this, url);

}

/// <summary>

/// Raised by a tool row's ↗ icon with the file it acted on. A dedicated event rather than

/// reusing <see cref="LinkClicked"/>: the path here is never a guess (it came straight off the

/// tool call), so a miss is worth telling the user about, unlike a markdown auto-link that is

/// often just prose that happened to look like a path.

/// </summary>

public event EventHandler<string> ToolFileOpenRequested;

private void OpenToolFile_Click(object sender, RoutedEventArgs e)

{

var message = (sender as FrameworkElement)?.DataContext as ChatMessageViewModel;

if (message == null || string.IsNullOrWhiteSpace(message.ToolFilePath))

{

return;

}

// The button already stops this click from also toggling the row's Expander (its own

// Click handling marks the routed mouse-up event handled before it bubbles that far), but

// an explicit mark here costs nothing and removes any doubt if that stops being true.

e.Handled = true;

ToolFileOpenRequested?.Invoke(this, message.ToolFilePath);

}

/// <summary>

/// Raised on Ctrl+V in the composer. The parent owns the clipboard image pipeline (it also owns

/// the attachment list), and sets <see cref="ChatPasteEventArgs.Handled"/> when it consumed the

/// clipboard as an image — otherwise the text box performs its normal text paste.

/// </summary>

public event EventHandler<ChatPasteEventArgs> PasteRequested;

/// <summary>Raised by ↑ on the first line of the composer: show the previous prompt.</summary>

public event EventHandler HistoryPreviousRequested;

/// <summary>Raised by ↓ on the last line of the composer: back towards the newest prompt.</summary>

public event EventHandler HistoryNextRequested;

/// <summary>Raised when the composer is resized by dragging, so the parent can persist the height.</summary>

public event EventHandler<double> ComposerHeightChanged;

/// <summary>Text currently in the composer.</summary>

public string ComposerText

{

get { return ComposerInput.Text; }

set { ComposerInput.Text = value ?? string.Empty; }

}

/// <summary>Chips host for the parent's attachment list. Presentation only — the parent fills it.</summary>

public System.Windows.Controls.Panel ComposerAttachmentsPanel

{

get { return ComposerAttachments; }

}

/// <summary>

/// The composer's raw text box. Exposed (like <see cref="ComposerAttachmentsPanel"/>) so the

/// parent's "@" file/folder mention popup can drive it directly (caret index, selection,

/// character-rect positioning) the same way it drives the panel's own prompt box.

/// </summary>

public TextBox ComposerInputBox

{

get { return ComposerInput; }

}

/// <summary>

/// Raised at the very top of the composer's PreviewKeyDown, before any of this view's own key

/// handling (Enter-to-send, history navigation, Escape). Lets the parent's "@" mention popup

/// claim Up/Down/Enter/Tab/Escape while it is open; setting <c>e.Handled</c> stops this view's

/// own handling too.

/// </summary>

public event EventHandler<System.Windows.Input.KeyEventArgs> ComposerPreviewKeyDown;

/// <summary>

/// True while the user is typing in the composer. Prompt history writes to whichever prompt box

/// has the keyboard, so the panel and the chat tab never overwrite each other's text.

/// </summary>

public bool ComposerHasFocus

{

get { return ComposerBar.Visibility == Visibility.Visible && ComposerInput.IsKeyboardFocusWithin; }

}

/// <summary>Mirrors the panel's send-key preference so Enter behaves the same in both places.</summary>

public bool SendWithEnter { get; set; } = true;

/// <summary>Mirrors the panel's Ctrl+Enter preference. Ignored while <see cref="SendWithEnter"/> is on.</summary>

public bool SendWithCtrlEnter { get; set; }

/// <summary>

/// How much of the composer is showing. <see cref="Hidden"/> outside native mode;

/// <see cref="ActionsOnly"/> while the chat is docked in the panel, where the panel's own

/// prompt box sits directly above the transcript and a second input box would just be

/// confusing — but the agent/model/effort/permission selectors and the mirrored config

/// buttons still need somewhere to live, since the panel hides its own equivalents in native

/// mode; <see cref="Full"/> once the chat has its own tab.

/// </summary>

public enum ComposerMode

{

Hidden,

ActionsOnly,

Full

}

private ComposerMode _composerMode = ComposerMode.Hidden;

private bool _toolsMenuHasItems = true;

private bool _customCommandsHasItems = true;

/// <summary>

/// Shows or hides the composer, and — in <see cref="ComposerMode.ActionsOnly"/> — trims it

/// down to just the selectors and ↻/✚/✎/🎨, collapsing the resize grip, attachment chips,

/// text input and the mirrored config buttons (⚙/☰/⚡ and the promoted-toolbar mirrors). Those

/// mirrors only earn their keep once the chat has left for its own tab (<see cref="Full"/>) —

/// while docked in the panel (<see cref="ActionsOnly"/>) the panel's own copies are right

/// there in the same window, so showing both would just be clutter.

/// </summary>

public void SetComposerMode(ComposerMode mode)

{

_composerMode = mode;

ComposerBar.Visibility = mode == ComposerMode.Hidden ? Visibility.Collapsed : Visibility.Visible;

Visibility fullOnly = mode == ComposerMode.Full ? Visibility.Visible : Visibility.Collapsed;

ComposerResizeGrip.Visibility = fullOnly;

ComposerAttachments.Visibility = fullOnly;

ComposerInputBorder.Visibility = fullOnly;

ComposerSettingsButton.Visibility = fullOnly;

ComposerPromotedButtons.Visibility = fullOnly;

UpdateToolsButtonVisibility();

UpdateCustomCommandsButtonVisibility();

// Only reachable while native mode is on (Hidden is the only mode outside it), so this is

// also the one place that needs to know: "Clear this conversation" doubles as "restart the

// agent" here, and the default tooltip doesn't say that.

ComposerClearButton.ToolTip = mode == ComposerMode.Hidden

? "Clear this conversation and start fresh"

: "Restart the agent and start a fresh conversation";

// ComposerBar's own Padding reserves room for the resize grip above and the input box

// below the action row — but in ActionsOnly those rows are collapsed (only the action

// row shows, docked in the panel), so the full bottom padding was rendering as dead

// space under the toolbar with nothing left to justify it.

ComposerBar.Padding = mode == ComposerMode.Full

? new Thickness(8, 6, 8, 8)

: new Thickness(8, 6, 8, 2);

// Docked in the panel the row has far less width than it does in a tab, and the switch

// between the two does not always change the row's own width — so the tier is re-picked

// here rather than waiting for a resize that may never come.

QueueComposerDensityRefresh();

}

/// <summary>Combines the Full-only gate above with the "menu would be empty" gate below.</summary>

private void UpdateToolsButtonVisibility()

{

ComposerToolsButton.Visibility = _composerMode == ComposerMode.Full && _toolsMenuHasItems

? Visibility.Visible

: Visibility.Collapsed;

}

/// <summary>Combines the Full-only gate above with the "no commands configured" gate below.</summary>

private void UpdateCustomCommandsButtonVisibility()

{

ComposerCustomCommandsButton.Visibility = _composerMode == ComposerMode.Full && _customCommandsHasItems

? Visibility.Visible

: Visibility.Collapsed;

}

/// <summary>Captions of the agent / model / effort / permission selectors.</summary>

public void SetSelectorLabels(string provider, string model, string effort, string permission)

{

_providerLabel = provider ?? "Agent";

_modelLabel = model ?? "Model";

_effortLabel = effort ?? "Effort";

_permissionLabel = permission ?? "Permissions";

// A longer caption can be what pushes the row past the edge, so the tier is re-picked here

// rather than only on resize — switching from "Ask" to "Skip permissions" is a resize as far

// as this row is concerned.

ApplyComposerDensity(_composerDensity);

QueueComposerDensityRefresh();

}

/// <summary>

/// The composer button a selector's menu should hang off, or null when there is nothing to hang

/// it on — native mode is off (<see cref="ComposerMode.Hidden"/>) or that particular selector

/// does not apply to the running agent. Resolves in <see cref="ComposerMode.ActionsOnly"/> too,

/// since the action row stays visible there. Used by the typed slash commands, which open the

/// same menus the buttons do; the caller falls back to its own anchor on null.

/// </summary>

public UIElement GetSelectorAnchor(ChatSelector selector)

{

if (ComposerBar.Visibility != Visibility.Visible)

{

return null;

}

Button button;

switch (selector)

{

case ChatSelector.Provider: button = ComposerProviderButton; break;

case ChatSelector.Model: button = ComposerModelButton; break;

case ChatSelector.Effort: button = ComposerEffortButton; break;

default: button = ComposerPermissionButton; break;

}

return button != null && button.Visibility == Visibility.Visible ? button : null;

}

/// <summary>Enables or hides the selectors that do not apply to the running agent.</summary>

public void SetSelectorAvailability(bool model, bool effort, bool permission)

{

ComposerModelButton.Visibility = model ? Visibility.Visible : Visibility.Collapsed;

ComposerEffortButton.Visibility = effort ? Visibility.Visible : Visibility.Collapsed;

ComposerPermissionButton.Visibility = permission ? Visibility.Visible : Visibility.Collapsed;

// Fewer selectors may mean the full captions fit again, so this can widen the row as well

// as narrow it — the refresh always starts from the roomiest tier.

QueueComposerDensityRefresh();

}

#region Composer density

/// <summary>

/// How much room the composer's action row is willing to spend on itself. Ordered widest

/// first: <see cref="RefreshComposerDensity"/> walks down the list and stops at the first tier

/// that fits, so a tab that is later widened climbs straight back to <see cref="Full"/>.

/// </summary>

private enum ComposerDensity

{

/// <summary>Full captions, roomy padding — what a docked-wide or floating tab shows.</summary>

Full,

/// <summary>Shortened captions ("Skip" for "Skip permissions") and tighter button padding.</summary>

Compact,

/// <summary>Compact, plus ↻/✚/✎/🎨 folded into the single "⋯" menu.</summary>

Tight

}

private static readonly ComposerDensity[] _composerDensityOrder =

{

ComposerDensity.Full,

ComposerDensity.Compact,

ComposerDensity.Tight

};

private ComposerDensity _composerDensity = ComposerDensity.Full;

private bool _composerDensityRefreshQueued;

private string _providerLabel = "Agent";

private string _modelLabel = "Model";

private string _effortLabel = "Effort";

private string _permissionLabel = "Permissions";

// No vertical padding, matching ComposerSelectorStyle: the buttons are a fixed 22 tall, and

// padding there only shrinks the content slot below the glyph's own line height — which WPF

// answers by top-aligning the content and clipping what hangs out the bottom.

private static readonly Thickness _composerFullPadding = new Thickness(7, 0, 7, 0);

private static readonly Thickness _composerTightPadding = new Thickness(4, 0, 4, 0);

private void ComposerActionRow_SizeChanged(object sender, SizeChangedEventArgs e)

{

if (!e.WidthChanged)

{

return;

}

QueueComposerDensityRefresh();

}

/// <summary>

/// Defers the tier decision to the end of the current layout pass. The refresh measures the

/// button row itself, which cannot be done from inside the arrange it would be reacting to, and

/// several of its triggers (labels, availability, mode) fire in a burst when the agent changes

/// — the queue collapses those into one pass.

/// </summary>

private void QueueComposerDensityRefresh()

{

if (_composerDensityRefreshQueued)

{

return;

}

_composerDensityRefreshQueued = true;

// Loaded priority so the row has been arranged (and therefore has an ActualWidth to

// measure against) before the tier is picked. The VS threading helpers cannot express a

// dispatcher priority, so the WPF dispatcher is the right tool here — every caller is

// already on the UI thread.

#pragma warning disable VSTHRD001, VSTHRD110

Dispatcher.BeginInvoke(new Action(() =>

{

_composerDensityRefreshQueued = false;

RefreshComposerDensity();

}), System.Windows.Threading.DispatcherPriority.Loaded);

#pragma warning restore VSTHRD001, VSTHRD110

}

/// <summary>

/// Picks the widest density tier whose essential group (session actions + selectors) still fits

/// the row, so the controls that drive the agent stay readable in a narrow tab instead of being

/// clipped off the edge. The mirrored config buttons are deliberately not measured: they sit

/// after the essentials in the same scroller and are meant to be what scrolls out of view, so

/// promoting a row of toolbar buttons must not cost the selectors their captions.

/// </summary>

private void RefreshComposerDensity()

{

if (ComposerBar.Visibility != Visibility.Visible)

{

return;

}

double available = ComposerActionRow.ActualWidth - 2;

if (available <= 0)

{

return;

}

foreach (ComposerDensity density in _composerDensityOrder)

{

ApplyComposerDensity(density);

// Unconstrained width on purpose: the group's own natural width is what has to be

// compared against the row, and the ScrollViewer above it measures with infinity too,

// so this asks exactly the question the scroller will answer.

ComposerEssentialGroup.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));

if (ComposerEssentialGroup.DesiredSize.Width <= available)

{

break;

}

// The measurements above ran against a constraint the layout system did not ask for; drop

// them so the next real pass measures the group the way its parent wants it.

ComposerEssentialGroup.InvalidateMeasure();

}

private void ApplyComposerDensity(ComposerDensity density)

{

_composerDensity = density;

bool full = density == ComposerDensity.Full;

int maxChars = density == ComposerDensity.Compact

? ComposerLabels.CompactMaxChars

: ComposerLabels.TightMaxChars;

ApplySelectorCaption(ComposerProviderButton, _providerLabel, "Change the AI agent", full, maxChars);

ApplySelectorCaption(ComposerModelButton, _modelLabel, "Change the model", full, maxChars);

ApplySelectorCaption(ComposerEffortButton, _effortLabel, "Change the effort level", full, maxChars);

ApplySelectorCaption(ComposerPermissionButton, _permissionLabel, "Change how tool permissions are handled", full, maxChars);

Thickness padding = full ? _composerFullPadding : _composerTightPadding;

ComposerOverflowButton.Padding = padding;

ComposerClearButton.Padding = padding;

ComposerNewChatButton.Padding = padding;

ComposerRenameSessionButton.Padding = padding;

ComposerColorButton.Padding = padding;

ComposerAttachButton.Padding = padding;

ComposerProviderButton.Padding = padding;

ComposerModelButton.Padding = padding;

ComposerEffortButton.Padding = padding;

ComposerPermissionButton.Padding = padding;

// The five session actions are the only controls here with an equivalent elsewhere in the

// UI (the ⋯ menu, the tab's own context menu), which is why they are what gives way before

// the selectors do.

bool folded = density == ComposerDensity.Tight;

Visibility unfolded = folded ? Visibility.Collapsed : Visibility.Visible;

ComposerOverflowButton.Visibility = folded ? Visibility.Visible : Visibility.Collapsed;

ComposerClearButton.Visibility = unfolded;

ComposerNewChatButton.Visibility = unfolded;

ComposerRenameSessionButton.Visibility = unfolded;

ComposerColorButton.Visibility = unfolded;

ComposerAttachButton.Visibility = unfolded;

ComposerActionsSeparator.Visibility = unfolded;

}

/// <summary>

/// Sets one selector's caption at the current tier, and — when the caption had to be shortened

/// — spells the full value out in the tooltip, so a truncated model id is never the only place

/// the selection is shown.

/// </summary>

private static void ApplySelectorCaption(Button button, string label, string tooltip, bool full, int maxChars)

{

string caption = full ? label : ComposerLabels.Shorten(label, maxChars);

button.Content = caption + " ▾";

button.ToolTip = string.Equals(caption, label, StringComparison.Ordinal)

? tooltip

: tooltip + " (" + label + ")";

}

#endregion

/// <summary>

/// Mirrors the panel's own "collapse ☰ when its dropdown would be empty" rule

/// (<c>RefreshToolbarLayout</c>'s <c>anyInDropdown</c>) onto the composer's ☰ mirror, so the

/// chat tab never offers a menu with nothing in it.

/// </summary>

public void SetToolsMenuHasItems(bool hasItems)

{

_toolsMenuHasItems = hasItems;

UpdateToolsButtonVisibility();

}

/// <summary>

/// Mirrors the panel's own "hide ⚡ when no custom commands are configured" rule

/// (<c>RefreshCustomCommandsButton</c>'s <c>hasAny</c>) onto the composer's ⚡ mirror, so the

/// chat tab never offers an empty custom-commands menu (issue #151 round 7).

/// </summary>

public void SetCustomCommandsMenuHasItems(bool hasItems)

{

_customCommandsHasItems = hasItems;

UpdateCustomCommandsButtonVisibility();

}

/// <summary>

/// The composer button a config menu should hang off, or null while the composer is

/// <see cref="ComposerMode.Hidden"/>. Same shape as <see cref="GetSelectorAnchor"/>.

/// </summary>

public UIElement GetConfigMenuAnchor(ChatConfigMenu menu)

{

if (ComposerBar.Visibility != Visibility.Visible)

{

return null;

}

Button button;

switch (menu)

{

case ChatConfigMenu.Tools: button = ComposerToolsButton; break;

case ChatConfigMenu.CustomCommands: button = ComposerCustomCommandsButton; break;

default: button = ComposerSettingsButton; break;

}

return button != null && button.Visibility == Visibility.Visible ? button : null;

}

/// <summary>

/// The mirrored promoted-toolbar button with the given id, or null while the composer is

/// <see cref="ComposerMode.Hidden"/> or no button with that id was passed to

/// <see cref="SetPromotedButtons"/>.

/// </summary>

public UIElement GetPromotedButtonAnchor(string id)

{

if (ComposerBar.Visibility != Visibility.Visible

|| ComposerPromotedButtons.Visibility != Visibility.Visible

|| string.IsNullOrEmpty(id))

{

return null;

}

foreach (Button button in ComposerPromotedButtons.Children)

{

if (id.Equals(button.Tag as string, StringComparison.Ordinal))

{

return button;

}

return null;

}

/// <summary>

/// Rebuilds the mirrored promoted-toolbar buttons from the panel's own set. Each entry's

/// content and tooltip are copied from the panel button that owns it, so there is only one

/// place (<c>RefreshToolbarLayout</c>) that decides the glyph or wording — this never drifts

/// out of sync with what the panel itself shows.

/// </summary>

public void SetPromotedButtons(IEnumerable<(string Id, object Content, object ToolTip)> buttons)

{

ComposerPromotedButtons.Children.Clear();

if (buttons == null)

{

return;

}

foreach (var entry in buttons)

{

var button = new Button

{

Style = (Style)FindResource("ComposerSelectorStyle"),

Content = entry.Content,

ToolTip = entry.ToolTip,

FontSize = 13,

Tag = entry.Id

};

button.Click += (s, e) => PromotedButtonClicked?.Invoke(this, ((Button)s).Tag as string);

ComposerPromotedButtons.Children.Add(button);

}

public void FocusComposer()

{

// In ActionsOnly the text input is collapsed (the panel's own prompt box is still the one

// being typed into), so there is nothing here to focus.

if (_composerMode != ComposerMode.Full) return;

ComposerInput.Focus();

ComposerInput.CaretIndex = ComposerInput.Text.Length;

}

/// <summary>

/// Shows or hides the Stop button. Called when a turn starts and when it completes.

/// </summary>

public void SetBusy(bool busy)

{

StopButton.Visibility = busy ? Visibility.Visible : Visibility.Collapsed;

}

/// <summary>

/// Text on the footer line (token counts, cost, "working…"). Empty hides the bar.

/// <para>

/// Stops the live clock: this is the "here is a fixed sentence" entry point, and leaving the

/// timer running would overwrite that sentence a second later.

/// </para>

/// </summary>

public void SetStatus(string text)

{

StopActivityTimer();

if (string.IsNullOrEmpty(text))

{

StatusBar.Visibility = Visibility.Collapsed;

StatusText.Text = string.Empty;

return;

}

StatusText.Text = text;

StatusBar.Visibility = Visibility.Visible;

}

#region Live turn clock

/// <summary>

/// Spinner frames. Geometric Shapes rather than the braille cells most CLI spinners use: braille

/// is absent from Segoe UI and only renders through a fallback font, which lands at a different

/// size and baseline than the text beside it.

/// </summary>

private static readonly string[] SpinnerFrames = { "◐", "◓", "◑", "◒" };

/// <summary>

/// What the agent is said to be doing while it works. Rotating wording is the point: an

/// unchanging line reads as frozen, and the clock alone does not say the agent is still alive.

/// </summary>

private static readonly string[] WorkingVerbs =

{

"Working", "Thinking", "Pondering", "Perusing", "Noodling", "Percolating",

"Crunching", "Mulling", "Tinkering", "Digging", "Puzzling", "Simmering",

"Cogitating", "Whirring", "Churning", "Deliberating"

};

private static readonly Random VerbPicker = new Random();

/// <summary>Frame rate of the spinner. Fast enough to read as motion, cheap enough to ignore.</summary>

private static readonly TimeSpan SpinnerInterval = TimeSpan.FromMilliseconds(120);

/// <summary>How long each verb stays up before the next one.</summary>

private static readonly TimeSpan VerbInterval = TimeSpan.FromSeconds(4);

/// <summary>Prompts accepted while the current turn is running and waiting for their turn.</summary>

private int _queuedMessageCount;

/// <summary>

/// Starts the spinner and the running clock on the status line. A long turn otherwise shows a

/// motionless "Working..." and gives no way to tell progress from a hang.

/// </summary>

public void BeginActivity()

{

_activityLabel = string.Empty;

_activityDetail = string.Empty;

_activityStartedUtc = DateTime.UtcNow;

_lastVerbChangeUtc = DateTime.UtcNow;

_spinnerFrame = 0;

_verbIndex = VerbPicker.Next(WorkingVerbs.Length);

if (_activityTimer == null)

{

_activityTimer = new System.Windows.Threading.DispatcherTimer(

System.Windows.Threading.DispatcherPriority.Normal)

{

Interval = SpinnerInterval

};

_activityTimer.Tick += delegate { AdvanceActivity(); };

}

_activityTimer.Start();

StatusBar.Visibility = Visibility.Visible;

StatusSpinner.Visibility = Visibility.Visible;

RenderActivity();

}

/// <summary>

/// Pins a fixed caption — "Waiting for your answer...", "Stopping..." — in place of the rotating

/// verbs. The spinner and the clock keep running: the turn is still open.

/// </summary>

public void SetActivityLabel(string label)

{

if (_activityTimer == null || !_activityTimer.IsEnabled)

{

return;

}

_activityLabel = label ?? string.Empty;

RenderActivity();

}

/// <summary>Live token counts, appended after the elapsed time. Empty removes them.</summary>

public void SetActivityDetail(string detail)

{

if (_activityTimer == null || !_activityTimer.IsEnabled)

{

return;

}

_activityDetail = detail ?? string.Empty;

RenderActivity();

}

/// <summary>

/// Shows how many follow-up messages are waiting without replacing the live token counts.

/// </summary>

public void SetQueuedMessageCount(int count)

{

_queuedMessageCount = Math.Max(0, count);

if (_activityTimer != null && _activityTimer.IsEnabled)

{

RenderActivity();

}

/// <summary>Stops the clock and leaves the turn's final summary on the line.</summary>

public void EndActivity(string summary)

{

SetStatus(summary);

}

/// <summary>How long the current turn has been running. Zero when none is.</summary>

public TimeSpan ActivityElapsed

{

get

{

return _activityTimer != null && _activityTimer.IsEnabled

? DateTime.UtcNow - _activityStartedUtc

: TimeSpan.Zero;

}

/// <summary>One animation frame: spin, and swap the verb when its turn is up.</summary>

private void AdvanceActivity()

{

_spinnerFrame = (_spinnerFrame + 1) % SpinnerFrames.Length;

// Only while no fixed caption is pinned — "Waiting for your answer..." must not drift into

// "Percolating..." while the user reads the question it is asking about.

if (_activityLabel.Length == 0 && DateTime.UtcNow - _lastVerbChangeUtc >= VerbInterval)

{

_verbIndex = (_verbIndex + 1) % WorkingVerbs.Length;

_lastVerbChangeUtc = DateTime.UtcNow;

}

RenderActivity();

// Piggyback on the same tick to animate any still-running tool row (e.g. a subagent Task

// card, which can sit for minutes) instead of a static "still running" glyph. Every tool

// call happens within a BeginActivity/EndActivity window, so this timer is always live

// whenever a row can be running.

foreach (var message in Messages)

{

if (message.IsRunning)

{

message.AdvanceSpinner();

}

private void RenderActivity()

{

StatusSpinner.Text = SpinnerFrames[_spinnerFrame];

string label = _activityLabel.Length > 0 ? _activityLabel : WorkingVerbs[_verbIndex] + "…";

string text = label + " " + ChatFormatting.Duration(DateTime.UtcNow - _activityStartedUtc);

if (!string.IsNullOrEmpty(_activityDetail))

{

text += " · " + _activityDetail;

}

if (_queuedMessageCount > 0)

{

text += " · " + _queuedMessageCount +

(_queuedMessageCount == 1 ? " message queued" : " messages queued");

}

StatusText.Text = text;

}

private void StopActivityTimer()

{

if (_activityTimer != null)

{

_activityTimer.Stop();

}

StatusSpinner.Visibility = Visibility.Collapsed;

}

#endregion

public void Clear()

{

StopTracking();

StopActivityTimer();

Messages.Clear();

_autoScroll = true;

_queuedMessageCount = 0;

ScrollToEndButton.Visibility = Visibility.Collapsed;

StopButton.Visibility = Visibility.Collapsed;

// The card belongs to a conversation, not to the view: whoever clears the transcript is

// about to decide whether a new one is starting, and calls ShowWelcome if it is.

HideWelcome();

}

#region Welcome card

/// <summary>

/// Fills and shows the card a fresh conversation opens on: what agent is running, against which

/// folder, and what the chat can do. Calling it again replaces the content, which is how the

/// caller fills in details that only arrive later (the CLI version, for one).

/// </summary>

/// <param name="title">Caption on the frame, e.g. <c>Claude Code v2.1.220</c>.</param>

/// <param name="facts">Lines under the mascot: model, effort, permissions, workspace.</param>

/// <param name="tips">Right-hand column, one line each.</param>

public void ShowWelcome(string title, IEnumerable<string> facts, IEnumerable<string> tips)

{

WelcomeTitle.Text = string.IsNullOrWhiteSpace(title) ? "Chat" : title;

WelcomeFacts.ItemsSource = ToLines(facts);

WelcomeTips.ItemsSource = ToLines(tips);

WelcomeBanner.Visibility = Visibility.Visible;

}

/// <summary>Drops the welcome card. Idempotent.</summary>

public void HideWelcome()

{

WelcomeBanner.Visibility = Visibility.Collapsed;

}

/// <summary>

/// True while the card is on screen. Callers that fill it in stages check this before redrawing,

/// so a late detail cannot bring back a card the first prompt already dismissed.

/// </summary>

public bool IsWelcomeVisible

{

get { return WelcomeBanner.Visibility == Visibility.Visible; }

}

/// <summary>Copies the caller's sequence, skipping blanks, so the card never shows empty rows.</summary>

private static List<string> ToLines(IEnumerable<string> source)

{

var lines = new List<string>();

if (source != null)

{

foreach (string line in source)

{

if (!string.IsNullOrWhiteSpace(line))

{

lines.Add(line);

}

return lines;

}

#endregion

private void StopButton_Click(object sender, RoutedEventArgs e)

{

StopRequested?.Invoke(this, EventArgs.Empty);

}

#region Composer

// The row scrolls horizontally but the mouse wheel is vertical by default, and there is no

// vertical content here for it to act on — without this, hovering the action row and scrolling

// does nothing instead of the horizontal scroll a user would expect.

private void ComposerActionsScroller_PreviewMouseWheel(object sender, System.Windows.Input.MouseWheelEventArgs e)

{

if (ComposerActionsScroller.ScrollableWidth <= 0)

{

return;

}

ComposerActionsScroller.ScrollToHorizontalOffset(ComposerActionsScroller.HorizontalOffset - e.Delta);

e.Handled = true;

}

private const double ComposerActionsScrollStep = 90;

private void ComposerActionsScrollLeftButton_Click(object sender, RoutedEventArgs e)

{

ComposerActionsScroller.ScrollToHorizontalOffset(ComposerActionsScroller.HorizontalOffset - ComposerActionsScrollStep);

}

private void ComposerActionsScrollRightButton_Click(object sender, RoutedEventArgs e)

{

ComposerActionsScroller.ScrollToHorizontalOffset(ComposerActionsScroller.HorizontalOffset + ComposerActionsScrollStep);

}

// Small ◀/▶ buttons stand in for the scrollbar track (too heavy visually for a row this

// thin), so this is the only signal for whether either end still has something to reach —

// fires whenever the row's content width, viewport, or offset changes. They toggle

// Collapsed, not Hidden: both arrow columns are Grid "Auto" width, and the middle column

View remainder of file in raw view

ClaudeCodeExtension/UI/ChatTranscriptView.xaml.cs at master · dliedke/ClaudeCodeExtension · GitHub

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