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Accessibility: Fix text field character count and line navigation

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Two fixes for text field accessibility:

1. Fix character count being off by one due to trailing newline always
   being appended to the last line. Add `is_last_line` parameter to
   `accessibility_create_sub_text_edit_elements()` to control this.

2. Link adjacent TextRuns via `previous_on_line`/`next_on_line` so
   screen readers can properly navigate lines. Without these links,
   AccessKit treats each TextRun as a separate line, causing incorrect
   announcements when arrowing through multi-line text.
This commit is contained in:
Nolan Darilek 2025-12-02 14:54:14 -05:00
parent 7a228b4b91
commit 6304e9f876
10 changed files with 50 additions and 28 deletions
Download patch file Download diff file Expand all files Collapse all files

2
doc/classes/DisplayServer.xml
View file

@ -34,8 +34,10 @@
<param index="1" name="shaped_text" type="RID" />
<param index="2" name="min_height" type="float" />
<param index="3" name="insert_pos" type="int" default="-1" />
<param index="4" name="is_last_line" type="bool" default="false" />
<description>
Creates a new, empty accessibility sub-element from the shaped text buffer. Sub-elements are freed automatically when the parent element is freed, or can be freed early using the [method accessibility_free_element] method.
If [param is_last_line] is [code]true[/code], no trailing newline is appended to the text content. Set to [code]true[/code] for the last line in multi-line text fields and for single-line text fields.
</description>
</method>
<method name="accessibility_element_get_meta" qualifiers="const">

40
drivers/accesskit/accessibility_driver_accesskit.cpp
View file

@ -250,7 +250,7 @@ RID AccessibilityDriverAccessKit::accessibility_create_sub_element(const RID &p_
return rid;
}
RID AccessibilityDriverAccessKit::accessibility_create_sub_text_edit_elements(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos) {
RID AccessibilityDriverAccessKit::accessibility_create_sub_text_edit_elements(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos, bool p_is_last_line) {
AccessibilityElement *parent_ae = rid_owner.get_or_null(p_parent_rid);
ERR_FAIL_NULL_V(parent_ae, RID());
@ -421,7 +421,7 @@ RID AccessibilityDriverAccessKit::accessibility_create_sub_text_edit_elements(co
run_off_x += size_x;
}
{
if (!p_is_last_line || text_elements.is_empty()) {
// Add "\n" at the end.
AccessibilityElement *ae = memnew(AccessibilityElement);
ae->role = ACCESSKIT_ROLE_TEXT_RUN;
@ -432,18 +432,22 @@ RID AccessibilityDriverAccessKit::accessibility_create_sub_text_edit_elements(co
text_elements.push_back(ae);
Vector<uint8_t> char_lengths;
char_lengths.push_back(1);
accesskit_node_set_value(ae->node, "\n");
accesskit_node_set_character_lengths(ae->node, char_lengths.size(), char_lengths.ptr());
if (!p_is_last_line) {
accesskit_node_set_value(ae->node, "\n");
Vector<float> char_positions;
Vector<float> char_widths;
char_positions.push_back(0.0);
char_widths.push_back(1.0);
Vector<uint8_t> char_lengths;
Vector<float> char_positions;
Vector<float> char_widths;
char_lengths.push_back(1);
char_positions.push_back(0.0);
char_widths.push_back(1.0);
accesskit_node_set_character_positions(ae->node, char_positions.size(), char_positions.ptr());
accesskit_node_set_character_widths(ae->node, char_widths.size(), char_widths.ptr());
accesskit_node_set_character_lengths(ae->node, char_lengths.size(), char_lengths.ptr());
accesskit_node_set_character_positions(ae->node, char_positions.size(), char_positions.ptr());
accesskit_node_set_character_widths(ae->node, char_widths.size(), char_widths.ptr());
} else {
accesskit_node_set_value(ae->node, "");
}
accesskit_node_set_text_direction(ae->node, ACCESSKIT_TEXT_DIRECTION_LEFT_TO_RIGHT);
accesskit_rect rect;
@ -461,10 +465,18 @@ RID AccessibilityDriverAccessKit::accessibility_create_sub_text_edit_elements(co
}
};
text_elements.sort_custom<RunCompare>();
for (AccessibilityElement *text_element : text_elements) {
RID rid = rid_owner.make_rid(text_element);
for (int i = 0; i < text_elements.size(); i++) {
RID rid = rid_owner.make_rid(text_elements[i]);
root_ae->children.push_back(rid);
wd->update.insert(rid);
// Link adjacent TextRuns on the same line.
if (i > 0) {
RID prev_rid = root_ae->children[i - 1];
AccessibilityElement *prev_ae = rid_owner.get_or_null(prev_rid);
accesskit_node_set_previous_on_line(text_elements[i]->node, (accesskit_node_id)prev_rid.get_id());
accesskit_node_set_next_on_line(prev_ae->node, (accesskit_node_id)rid.get_id());
}
}
return root_rid;

2
drivers/accesskit/accessibility_driver_accesskit.h
View file

@ -113,7 +113,7 @@ public:
RID accessibility_create_element(DisplayServer::WindowID p_window_id, DisplayServer::AccessibilityRole p_role) override;
RID accessibility_create_sub_element(const RID &p_parent_rid, DisplayServer::AccessibilityRole p_role, int p_insert_pos = -1) override;
virtual RID accessibility_create_sub_text_edit_elements(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos = -1) override;
virtual RID accessibility_create_sub_text_edit_elements(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos = -1, bool p_is_last_line = false) override;
bool accessibility_has_element(const RID &p_id) const override;
void accessibility_free_element(const RID &p_id) override;

7
misc/extension_api_validation/4.5-stable.expected
View file

@ -233,3 +233,10 @@ Validate extension JSON: Error: Field 'classes/EditorExportPreset/methods/get_sc
Validate extension JSON: Error: Field 'classes/EditorExportPreset/methods/get_script_export_mode/return_value': type changed value in new API, from "int" to "enum::EditorExportPreset.ScriptExportMode".
Change return type from `int` to `EditorExportPreset.ScriptExportMode` enum. Compatibility method registered.
GH-113459
---------
Validate extension JSON: Error: Field 'classes/DisplayServer/methods/accessibility_create_sub_text_edit_elements/arguments': size changed value in new API, from 4 to 5.
Optional argument added. Compatibility method registered.

2
scene/gui/line_edit.cpp
View file

@ -1311,7 +1311,7 @@ void LineEdit::_notification(int p_what) {
float text_off_x = x_ofs + scroll_offset;
if (accessibility_text_root_element.is_null()) {
accessibility_text_root_element = DisplayServer::get_singleton()->accessibility_create_sub_text_edit_elements(ae, using_placeholder ? RID() : text_rid, text_height);
accessibility_text_root_element = DisplayServer::get_singleton()->accessibility_create_sub_text_edit_elements(ae, using_placeholder ? RID() : text_rid, text_height, -1, true);
}
Transform2D text_xform;

7
scene/gui/text_edit.cpp
View file

@ -243,7 +243,8 @@ void TextEdit::Text::update_accessibility(int p_line, RID p_root) {
Line &l = text.write[p_line];
if (l.accessibility_text_root_element.is_empty()) {
for (int i = 0; i < l.data_buf->get_line_count(); i++) {
RID rid = DisplayServer::get_singleton()->accessibility_create_sub_text_edit_elements(p_root, l.data_buf->get_line_rid(i), max_line_height, p_line);
bool is_last_line = (p_line == text.size() - 1) && (i == l.data_buf->get_line_count() - 1);
RID rid = DisplayServer::get_singleton()->accessibility_create_sub_text_edit_elements(p_root, l.data_buf->get_line_rid(i), max_line_height, p_line, is_last_line);
l.accessibility_text_root_element.push_back(rid);
}
}
@ -738,7 +739,6 @@ void TextEdit::_notification(int p_what) {
case NOTIFICATION_EXIT_TREE:
case NOTIFICATION_ACCESSIBILITY_INVALIDATE: {
text.clear_accessibility();
accessibility_text_root_element_nl = RID();
} break;
case NOTIFICATION_ACCESSIBILITY_UPDATE: {
@ -807,9 +807,6 @@ void TextEdit::_notification(int p_what) {
}
lines_drawn += ac_buf->get_line_count();
}
if (accessibility_text_root_element_nl.is_null()) {
accessibility_text_root_element_nl = DisplayServer::get_singleton()->accessibility_create_sub_text_edit_elements(ae, RID(), get_line_height());
}
// Selection.
if (carets.size() > 0) {

2
scene/gui/text_edit.h
View file

@ -659,8 +659,6 @@ private:
bool draw_tabs = false;
bool draw_spaces = false;
RID accessibility_text_root_element_nl;
// FIXME: Helper method to draw unfilled rects, should be moved to RenderingServer.
void _draw_rect_unfilled(RID p_canvas_item, const Rect2 &p_rect, const Color &p_color, real_t p_width = -1.0, bool p_antialiased = false) const;

5
servers/display/display_server.compat.inc
View file

@ -38,9 +38,14 @@ Error DisplayServer::_file_dialog_with_options_show_bind_compat_98194(const Stri
return file_dialog_with_options_show(p_title, p_current_directory, p_root, p_filename, p_show_hidden, p_mode, p_filters, p_options, p_callback, MAIN_WINDOW_ID);
}
RID DisplayServer::_accessibility_create_sub_text_edit_elements_bind_compat_113459(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos) {
return accessibility_create_sub_text_edit_elements(p_parent_rid, p_shaped_text, p_min_height, p_insert_pos, false);
}
void DisplayServer::_bind_compatibility_methods() {
ClassDB::bind_compatibility_method(D_METHOD("file_dialog_show", "title", "current_directory", "filename", "show_hidden", "mode", "filters", "callback"), &DisplayServer::_file_dialog_show_bind_compat_98194);
ClassDB::bind_compatibility_method(D_METHOD("file_dialog_with_options_show", "title", "current_directory", "root", "filename", "show_hidden", "mode", "filters", "options", "callback"), &DisplayServer::_file_dialog_with_options_show_bind_compat_98194);
ClassDB::bind_compatibility_method(D_METHOD("accessibility_create_sub_text_edit_elements", "parent_rid", "shaped_text", "min_height", "insert_pos"), &DisplayServer::_accessibility_create_sub_text_edit_elements_bind_compat_113459, DEFVAL(-1));
}
#endif

6
servers/display/display_server.cpp
View file

@ -648,9 +648,9 @@ RID DisplayServer::accessibility_create_sub_element(const RID &p_parent_rid, Dis
}
}
RID DisplayServer::accessibility_create_sub_text_edit_elements(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos) {
RID DisplayServer::accessibility_create_sub_text_edit_elements(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos, bool p_is_last_line) {
if (accessibility_driver) {
return accessibility_driver->accessibility_create_sub_text_edit_elements(p_parent_rid, p_shaped_text, p_min_height, p_insert_pos);
return accessibility_driver->accessibility_create_sub_text_edit_elements(p_parent_rid, p_shaped_text, p_min_height, p_insert_pos, p_is_last_line);
} else {
return RID();
}
@ -1485,7 +1485,7 @@ void DisplayServer::_bind_methods() {
ClassDB::bind_method(D_METHOD("accessibility_create_element", "window_id", "role"), &DisplayServer::accessibility_create_element);
ClassDB::bind_method(D_METHOD("accessibility_create_sub_element", "parent_rid", "role", "insert_pos"), &DisplayServer::accessibility_create_sub_element, DEFVAL(-1));
ClassDB::bind_method(D_METHOD("accessibility_create_sub_text_edit_elements", "parent_rid", "shaped_text", "min_height", "insert_pos"), &DisplayServer::accessibility_create_sub_text_edit_elements, DEFVAL(-1));
ClassDB::bind_method(D_METHOD("accessibility_create_sub_text_edit_elements", "parent_rid", "shaped_text", "min_height", "insert_pos", "is_last_line"), &DisplayServer::accessibility_create_sub_text_edit_elements, DEFVAL(-1), DEFVAL(false));
ClassDB::bind_method(D_METHOD("accessibility_has_element", "id"), &DisplayServer::accessibility_has_element);
ClassDB::bind_method(D_METHOD("accessibility_free_element", "id"), &DisplayServer::accessibility_free_element);
ClassDB::bind_method(D_METHOD("accessibility_element_set_meta", "id", "meta"), &DisplayServer::accessibility_element_set_meta);

5
servers/display/display_server.h
View file

@ -50,6 +50,7 @@ class DisplayServer : public Object {
mutable HashMap<String, RID> menu_names;
RID _get_rid_from_name(NativeMenu *p_nmenu, const String &p_menu_root) const;
RID _accessibility_create_sub_text_edit_elements_bind_compat_113459(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos = -1);
#endif
LocalVector<ObjectID> additional_outputs;
@ -678,7 +679,7 @@ public:
virtual RID accessibility_create_element(WindowID p_window_id, DisplayServer::AccessibilityRole p_role);
virtual RID accessibility_create_sub_element(const RID &p_parent_rid, DisplayServer::AccessibilityRole p_role, int p_insert_pos = -1);
virtual RID accessibility_create_sub_text_edit_elements(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos = -1);
virtual RID accessibility_create_sub_text_edit_elements(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos = -1, bool p_is_last_line = false);
virtual bool accessibility_has_element(const RID &p_id) const;
virtual void accessibility_free_element(const RID &p_id);
@ -910,7 +911,7 @@ public:
virtual RID accessibility_create_element(DisplayServer::WindowID p_window_id, DisplayServer::AccessibilityRole p_role) = 0;
virtual RID accessibility_create_sub_element(const RID &p_parent_rid, DisplayServer::AccessibilityRole p_role, int p_insert_pos = -1) = 0;
virtual RID accessibility_create_sub_text_edit_elements(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos = -1) = 0;
virtual RID accessibility_create_sub_text_edit_elements(const RID &p_parent_rid, const RID &p_shaped_text, float p_min_height, int p_insert_pos = -1, bool p_is_last_line = false) = 0;
virtual bool accessibility_has_element(const RID &p_id) const = 0;
virtual void accessibility_free_element(const RID &p_id) = 0;