editor: Fix cursor positioning with pointer and touch

The calculation off the vertical offset between the widget coordinates
and where the text was rendered was wrong. It was using the constant for
horizontal offset for that too.

Fixes: https://bugs.freedesktop.org/show_bug.cgi?id=78411

clients/editor.c

@@ -1011,7 +1011,17 @@ text_entry_draw_cursor(struct text_entry *entry, cairo_t *cr)
 	cairo_stroke(cr);
 }
 
-static const int text_offset_left = 10;
+static int
+text_offset_left(struct rectangle *allocation)
+{
+	return 10;
+}
+
+static int
+text_offset_top(struct rectangle *allocation)
+{
+	return allocation->height / 2;
+}
 
 static void
 text_entry_redraw_handler(struct widget *widget, void *data)
@@ -1048,7 +1058,9 @@ text_entry_redraw_handler(struct widget *widget, void *data)
 
 	cairo_set_source_rgba(cr, 0, 0, 0, 1);
 
-	cairo_translate(cr, text_offset_left, allocation.height / 2);
+	cairo_translate(cr,
+			text_offset_left(&allocation),
+			text_offset_top(&allocation));
 
 	if (!entry->layout)
 		entry->layout = pango_cairo_create_layout(cr);
@@ -1075,6 +1087,7 @@ text_entry_motion_handler(struct widget *widget,
 {
 	struct text_entry *entry = data;
 	struct rectangle allocation;
+	int tx, ty;
 
 	if (!entry->button_pressed) {
 		return CURSOR_IBEAM;
@@ -1082,10 +1095,10 @@ text_entry_motion_handler(struct widget *widget,
 
 	widget_get_allocation(entry->widget, &allocation);
 
-	text_entry_set_cursor_position(entry,
-				       x - allocation.x - text_offset_left,
-				       y - allocation.y - text_offset_left,
-				       false);
+	tx = x - allocation.x - text_offset_left(&allocation);
+	ty = y - allocation.y - text_offset_top(&allocation);
+
+	text_entry_set_cursor_position(entry, tx, ty, false);
 
 	return CURSOR_IBEAM;
 }
@@ -1105,8 +1118,8 @@ text_entry_button_handler(struct widget *widget,
 	widget_get_allocation(entry->widget, &allocation);
 	input_get_position(input, &x, &y);
 
-	x -= allocation.x + text_offset_left;
-	y -= allocation.y + text_offset_left;
+	x -= allocation.x + text_offset_left(&allocation);
+	y -= allocation.y + text_offset_top(&allocation);
 
 	editor = window_get_user_data(entry->window);
 
@@ -1149,8 +1162,8 @@ text_entry_touch_handler(struct widget *widget, struct input *input,
 
 	widget_get_allocation(entry->widget, &allocation);
 
-	x = tx - (allocation.x + text_offset_left);
-	y = ty - (allocation.y + text_offset_left);
+	x = tx - (allocation.x + text_offset_left(&allocation));
+	y = ty - (allocation.y + text_offset_top(&allocation));
 
 	editor = window_get_user_data(entry->window);
 	text_entry_activate(entry, seat);