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Highlight selection plugin: Fix highlighting when same word reselected #1582

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jeremypw wants to merge 5 commits into from
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Highlight selection plugin: Fix highlighting when same word reselected #1582

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6ba7682
Simplify working of highlight selection
jeremypw May 29, 2025
fb4bf86
Ensure update_draw_spaces () redraws SourceView
jeremypw May 29, 2025
4c8604f
Merge branch 'master' into jeremypw/rework-highlight-selection2
jeremypw Jun 5, 2025
a62272a
Merge branch 'master' into jeremypw/rework-highlight-selection2
jeremypw Jul 16, 2025
e9a80b0
Merge branch 'master' into jeremypw/rework-highlight-selection2
jeremypw Jan 25, 2026
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36 changes: 18 additions & 18 deletions plugins/highlight-word-selection/highlight-word-selection.vala
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Original file line number Diff line number Diff line change
Expand Up @@ -34,30 +34,27 @@ public class Scratch.Plugins.HighlightSelectedWords : Peas.ExtensionBase, Scratc
plugins = (Scratch.Services.Interface) object;
plugins.hook_document.connect ((doc) => {
if (current_source != null) {
current_source.selection_changed.disconnect (on_selection_changed);
current_source.selection_event.disconnect (on_selection_changed);
}

current_source = doc.source_view;
current_source.selection_changed.connect (on_selection_changed);
current_source.selection_event.connect (on_selection_changed);
});

plugins.hook_window.connect ((w) => {
main_window = w;
});
}

// A deselection is now treated as a selection change
private void on_selection_changed () requires (main_window != null) {
private void on_selection_changed (ref Gtk.TextIter start, ref Gtk.TextIter end) requires (main_window != null) {
if (current_search_context != null) {
// Cancel existing search
current_search_context.set_highlight (false);
current_search_context = null;
}

// Only highlight (extended) selection if non-zero length and search highlighting not happening
Gtk.TextIter start, end;
if (current_source.buffer.get_selection_bounds (out start, out end) &&
!main_window.has_successful_search ()) {
if (!main_window.has_successful_search ()) {
// Perform plugin selection when there is no ongoing and successful search
var original_start = start.copy ();

// Ignore leading space
Expand Down Expand Up @@ -113,22 +110,25 @@ public class Scratch.Plugins.HighlightSelectedWords : Peas.ExtensionBase, Scratc

// Ensure no leading or trailing space
var selected_text = start.get_text (end).strip ();

// We know the selected text is non-zero length, check not too long
if (selected_text.char_count () <= SELECTION_HIGHLIGHT_MAX_CHARS) {
current_search_context = new Gtk.SourceSearchContext (
(Gtk.SourceBuffer)current_source.buffer,
null
);
current_search_context.settings.search_text = selected_text;
current_search_context.set_highlight (true);
if (selected_text.char_count () > SELECTION_HIGHLIGHT_MAX_CHARS) {
//Nevertheless select as much as permitted
selected_text = selected_text.substring (0, SELECTION_HIGHLIGHT_MAX_CHARS);
}

current_search_context = new Gtk.SourceSearchContext (
(Gtk.SourceBuffer)current_source.buffer,
null
);
current_search_context.settings.search_text = "";
current_search_context.set_highlight (false);
current_search_context.settings.search_text = selected_text;
current_search_context.set_highlight (true);
}
}

public void deactivate () {
if (current_source != null) {
current_source.selection_changed.disconnect (on_selection_changed);
current_source.selection_event.disconnect (on_selection_changed);
}
}
}
Expand Down
63 changes: 28 additions & 35 deletions src/Widgets/SourceView.vala
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Original file line number Diff line number Diff line change
Expand Up @@ -35,7 +35,6 @@ namespace Scratch.Widgets {
private uint size_allocate_timer = 0;
private Gtk.TextIter last_select_start_iter;
private Gtk.TextIter last_select_end_iter;
private string selected_text = "";
private GitGutterRenderer git_diff_gutter_renderer;
private NavMarkGutterRenderer navmark_gutter_renderer;

Expand All @@ -44,9 +43,9 @@ namespace Scratch.Widgets {
private const double SCROLL_THRESHOLD = 1.0;

public signal void style_changed (Gtk.SourceStyleScheme style);
// "selection_changed" signal now only emitted when the selected text changes (position ignored).
// Listened to by searchbar and highlight word selection plugin
public signal void selection_changed (Gtk.TextIter start_iter, Gtk.TextIter end_iter);
// "selection_event" signal emitted when selection changes. May be selection or deselection.
// Listened to by highlight word selection plugin
public signal void selection_event (Gtk.TextIter start_iter, Gtk.TextIter end_iter);

//lang can be null, in the case of *No highlight style* aka Normal text
public Gtk.SourceLanguage? language {
Expand Down Expand Up @@ -559,20 +558,17 @@ namespace Scratch.Widgets {

Gtk.TextIter start, end;
var selection = buffer.get_selection_bounds (out start, out end);
var draw_spaces_state = (ScratchDrawSpacesState) Scratch.settings.get_enum ("draw-spaces");
var draw_spaces_state = Scratch.settings.get_enum ("draw-spaces");
/* Draw spaces in selection the same way if drawn at all */
if (selection &&
draw_spaces_state in (ScratchDrawSpacesState.FOR_SELECTION | ScratchDrawSpacesState.CURRENT | ScratchDrawSpacesState.ALWAYS)) {

if (selection && draw_spaces_state != ScratchDrawSpacesState.NEVER) {
buffer.apply_tag_by_name ("draw_spaces", start, end);
} else if (draw_spaces_state == ScratchDrawSpacesState.CURRENT) {
get_current_line (out start, out end);
buffer.apply_tag_by_name ("draw_spaces", start, end);
return;
}

if (draw_spaces_state == ScratchDrawSpacesState.CURRENT &&
get_current_line (out start, out end)) {

buffer.apply_tag_by_name ("draw_spaces", start, end);
}
//This is required for reliable results when this function is called from another thread (e.g. SourceFunc)
queue_draw ();
}

private void on_context_menu (Gtk.Menu menu) {
Expand Down Expand Up @@ -642,23 +638,34 @@ namespace Scratch.Widgets {

private void on_mark_set (Gtk.TextIter loc, Gtk.TextMark mar) {
// Weed out user movement for text selection changes
// may not be new selection - also caused by highlighting for example
Gtk.TextIter start, end;
buffer.get_selection_bounds (out start, out end);

if (start.equal (last_select_start_iter) && end.equal (last_select_end_iter)) {
if (last_select_start_iter.equal (start) && last_select_end_iter.equal (end)) {
// Selection unchanged - update draw spaces when required
return;
} else {
last_select_start_iter.assign (start);
last_select_end_iter.assign (end);
}

last_select_start_iter.assign (start);
last_select_end_iter.assign (end);
update_draw_spaces ();

if (selection_changed_timer != 0) {
Source.remove (selection_changed_timer);
selection_changed_timer = 0;
}

selection_changed_timer = Timeout.add (THROTTLE_MS, selection_changed_event);
selection_changed_timer = Timeout.add (
THROTTLE_MS,
() => {
selection_changed_timer = 0;
update_draw_spaces ();

Gtk.TextIter s, e;
bool selected = buffer.get_selection_bounds (out s, out e);
selection_event (s, e);
return Source.REMOVE;
}
);
}

private void on_mark_deleted (Gtk.TextMark mark) {
Expand All @@ -669,20 +676,6 @@ namespace Scratch.Widgets {
}
}

private bool selection_changed_event () {
Gtk.TextIter start, end;
buffer.get_selection_bounds (out start, out end);
// No selection now treated as a potential selection change
var prev_selected_text = selected_text;
selected_text = buffer.get_text (start, end, true);
if (selected_text != prev_selected_text) {
selection_changed (start, end);
}

selection_changed_timer = 0;
return false;
}

uint refresh_timeout_id = 0;
public void schedule_refresh () {
if (refresh_timeout_id > 0) {
Expand Down