mirrors
/
weston
mirror of https://gitlab.freedesktop.org/wayland/weston.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

editor: Add support for selection 

Make it possible to select text and render the selection to the editor
example.

Signed-off-by: Jan Arne Petersen <jpetersen@openismus.com>
This commit is contained in:
Jan Arne Petersen 2012-09-09 23:08:38 +02:00 committed by Kristian Høgsberg
parent 09e7c96574
commit 0e5bd45100
1 changed files with 75 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

76
clients/editor.c
View File

@ -50,6 +50,7 @@ struct text_entry {
char *text;
int active;
uint32_t cursor;
uint32_t anchor;
struct text_model *model;
struct text_layout *layout;
};
@ -309,6 +310,7 @@ text_entry_create(struct editor *editor, const char *text)
entry->text = strdup(text);
entry->active = 0;
entry->cursor = strlen(text);
entry->anchor = entry->cursor;
entry->model = text_model_factory_create_text_model(editor->text_model_factory);
text_model_add_listener(entry->model, &text_model_listener, entry);
@ -418,6 +420,7 @@ text_entry_insert_at_cursor(struct text_entry *entry, const char *text)
free(entry->text);
entry->text = new_text;
entry->cursor += strlen(text);
entry->anchor += strlen(text);
text_layout_set_text(entry->layout, entry->text);
}
@ -431,6 +434,50 @@ text_entry_set_cursor_position(struct text_entry *entry,
widget_schedule_redraw(entry->widget);
}
static void
text_entry_set_anchor_position(struct text_entry *entry,
int32_t x, int32_t y)
{
entry->anchor = text_layout_xy_to_index(entry->layout, x, y);
widget_schedule_redraw(entry->widget);
}
static void
text_entry_draw_selection(struct text_entry *entry, cairo_t *cr)
{
cairo_text_extents_t extents;
uint32_t start_index = entry->anchor < entry->cursor ? entry->anchor : entry->cursor;
uint32_t end_index = entry->anchor < entry->cursor ? entry->cursor : entry->anchor;
cairo_rectangle_t start;
cairo_rectangle_t end;
if (entry->anchor == entry->cursor)
return;
text_layout_extents(entry->layout, &extents);
text_layout_index_to_pos(entry->layout, start_index, &start);
text_layout_index_to_pos(entry->layout, end_index, &end);
cairo_save (cr);
cairo_set_source_rgba(cr, 0.0, 0.0, 1.0, 1.0);
cairo_rectangle(cr,
start.x, extents.y_bearing + extents.height + 2,
end.x - start.x, -extents.height - 4);
cairo_fill(cr);
cairo_rectangle(cr,
start.x, extents.y_bearing + extents.height,
end.x - start.x, -extents.height);
cairo_clip(cr);
cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
text_layout_draw(entry->layout, cr);
cairo_restore (cr);
}
static void
text_entry_draw_cursor(struct text_entry *entry, cairo_t *cr)
{
@ -484,6 +531,8 @@ text_entry_redraw_handler(struct widget *widget, void *data)
cairo_translate(cr, 10, allocation.height / 2);
text_layout_draw(entry->layout, cr);
text_entry_draw_selection(entry, cr);
text_entry_draw_cursor(entry, cr);
cairo_pop_group_to_source(cr);
@ -493,6 +542,23 @@ text_entry_redraw_handler(struct widget *widget, void *data)
cairo_surface_destroy(surface);
}
static int
text_entry_motion_handler(struct widget *widget,
struct input *input, uint32_t time,
float x, float y, void *data)
{
struct text_entry *entry = data;
struct rectangle allocation;
widget_get_allocation(entry->widget, &allocation);
text_entry_set_cursor_position(entry,
x - allocation.x,
y - allocation.y);
return CURSOR_IBEAM;
}
static void
text_entry_button_handler(struct widget *widget,
struct input *input, uint32_t time,
@ -510,7 +576,7 @@ text_entry_button_handler(struct widget *widget,
return;
}
text_entry_set_cursor_position(entry,
text_entry_set_cursor_position(entry,
x - allocation.x,
y - allocation.y);
@ -518,6 +584,14 @@ text_entry_button_handler(struct widget *widget,
struct wl_seat *seat = input_get_seat(input);
text_entry_activate(entry, seat);
text_entry_set_anchor_position(entry,
x - allocation.x,
y - allocation.y);
widget_set_motion_handler(entry->widget, text_entry_motion_handler);
} else {
widget_set_motion_handler(entry->widget, NULL);
}
}