1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Internal header file for scenes
5 * Copyright 2022 Google LLC
9 #ifndef __SCENE_INTERNAL_H
10 #define __SCENE_INTERNAL_H
12 struct vidconsole_bbox;
14 typedef int (*expo_scene_obj_iterator)(struct scene_obj *obj, void *priv);
17 * expo_lookup_scene_id() - Look up a scene ID
20 * @id: scene ID to look up
21 * Returns: Scene for that ID, or NULL if none
23 struct scene *expo_lookup_scene_id(struct expo *exp, uint scene_id);
26 * resolve_id() - Automatically allocate an ID if needed
29 * @id: ID to use, or 0 to auto-allocate one
30 * Returns: Either @id, or the auto-allocated ID
32 uint resolve_id(struct expo *exp, uint id);
35 * scene_obj_find() - Find an object in a scene
37 * Note that @type is used to restrict the search when the object type is known.
38 * If any type is acceptable, set @type to SCENEOBJT_NONE
40 * @scn: Scene to search
41 * @id: ID of object to find
42 * @type: Type of the object, or SCENEOBJT_NONE to match any type
43 * Returns: Object found, or NULL if not found
45 void *scene_obj_find(const struct scene *scn, uint id, enum scene_obj_t type);
48 * scene_obj_find_by_name() - Find an object in a scene by name
50 * @scn: Scene to search
51 * @name: Name to search for
53 void *scene_obj_find_by_name(struct scene *scn, const char *name);
56 * scene_obj_add() - Add a new object to a scene
58 * @scn: Scene to update
59 * @name: Name to use (this is allocated by this call)
60 * @id: ID to use for the new object (0 to allocate one)
61 * @type: Type of object to add
62 * @size: Size to allocate for the object, in bytes
63 * @objp: Returns a pointer to the new object (must not be NULL)
64 * Returns: ID number for the object (generally @id), or -ve on error
66 int scene_obj_add(struct scene *scn, const char *name, uint id,
67 enum scene_obj_t type, uint size, struct scene_obj **objp);
70 * scene_obj_flag_clrset() - Adjust object flags
72 * @scn: Scene to update
73 * @id: ID of object to update
74 * @clr: Bits to clear in the object's flags
75 * @set: Bits to set in the object's flags
76 * Returns 0 if OK, -ENOENT if the object was not found
78 int scene_obj_flag_clrset(struct scene *scn, uint id, uint clr, uint set);
81 * scene_calc_dims() - Calculate the dimensions of the scene objects
83 * Updates the width and height of all objects based on their contents
85 * @scn: Scene to update
86 * @do_menus: true to calculate only menus, false to calculate everything else
87 * Returns 0 if OK, -ENOTSUPP if there is no graphical console
89 int scene_calc_dims(struct scene *scn, bool do_menus);
92 * scene_menu_arrange() - Set the position of things in the menu
94 * This updates any items associated with a menu to make sure they are
95 * positioned correctly relative to the menu. It also selects the first item
98 * @scn: Scene to update
99 * @arr: Arrangement information
100 * @menu: Menu to process
101 * Returns: 0 if OK, -ve on error
103 int scene_menu_arrange(struct scene *scn, struct expo_arrange_info *arr,
104 struct scene_obj_menu *menu);
107 * scene_textline_arrange() - Set the position of things in a textline
109 * This updates any items associated with a textline to make sure they are
110 * positioned correctly relative to the textline.
112 * @scn: Scene to update
113 * @arr: Arrangement information
114 * @tline: textline to process
115 * Returns: 0 if OK, -ve on error
117 int scene_textline_arrange(struct scene *scn, struct expo_arrange_info *arr,
118 struct scene_obj_textline *tline);
121 * scene_apply_theme() - Apply a theme to a scene
123 * @scn: Scene to update
124 * @theme: Theme to apply
125 * Returns: 0 if OK, -ve on error
127 int scene_apply_theme(struct scene *scn, struct expo_theme *theme);
130 * scene_menu_send_key() - Send a key to a menu for processing
134 * @key: Key code to send (KEY_...)
135 * @event: Place to put any event which is generated by the key
136 * Returns: 0 if OK, -ENOTTY if there is no current menu item, other -ve on other
139 int scene_menu_send_key(struct scene *scn, struct scene_obj_menu *menu, int key,
140 struct expo_action *event);
143 * scene_textline_send_key() - Send a key to a textline for processing
146 * @tline: textline to use
147 * @key: Key code to send (KEY_...)
148 * @event: Place to put any event which is generated by the key
149 * Returns: 0 if OK (always)
151 int scene_textline_send_key(struct scene *scn, struct scene_obj_textline *tline,
152 int key, struct expo_action *event);
155 * scene_menu_destroy() - Destroy a menu in a scene
157 * @scn: Scene to destroy
159 void scene_menu_destroy(struct scene_obj_menu *menu);
162 * scene_menu_display() - Display a menu as text
164 * @menu: Menu to display
165 * Returns: 0 if OK, -ENOENT if @id is invalid
167 int scene_menu_display(struct scene_obj_menu *menu);
170 * scene_destroy() - Destroy a scene and all its memory
172 * @scn: Scene to destroy
174 void scene_destroy(struct scene *scn);
177 * scene_render() - Render a scene
179 * This is called from expo_render()
181 * @scn: Scene to render
182 * Returns: 0 if OK, -ve on error
184 int scene_render(struct scene *scn);
187 * scene_send_key() - set a keypress to a scene
189 * @scn: Scene to receive the key
190 * @key: Key to send (KEYCODE_UP)
191 * @event: Returns resulting event from this keypress
192 * Returns: 0 if OK, -ve on error
194 int scene_send_key(struct scene *scn, int key, struct expo_action *event);
197 * scene_render_deps() - Render an object and its dependencies
199 * @scn: Scene to render
200 * @id: Object ID to render (or 0 for none)
201 * Returns: 0 if OK, -ve on error
203 int scene_render_deps(struct scene *scn, uint id);
206 * scene_menu_render_deps() - Render a menu and its dependencies
208 * Renders the menu and all of its attached objects
210 * @scn: Scene to render
211 * @menu: Menu to render
212 * Returns: 0 if OK, -ve on error
214 int scene_menu_render_deps(struct scene *scn, struct scene_obj_menu *menu);
217 * scene_textline_render_deps() - Render a textline and its dependencies
219 * Renders the textline and all of its attached objects
221 * @scn: Scene to render
222 * @tline: textline to render
223 * Returns: 0 if OK, -ve on error
225 int scene_textline_render_deps(struct scene *scn,
226 struct scene_obj_textline *tline);
229 * scene_menu_calc_dims() - Calculate the dimensions of a menu
231 * Updates the width and height of the menu based on its contents
233 * @menu: Menu to update
234 * Returns 0 if OK, -ENOTSUPP if there is no graphical console
236 int scene_menu_calc_dims(struct scene_obj_menu *menu);
239 * scene_iter_objs() - Iterate through all scene objects
241 * @scn: Scene to process
242 * @iter: Iterator to call on each object
243 * @priv: Private data to pass to the iterator, in addition to the object
244 * Return: 0 if OK, -ve on error
246 int scene_iter_objs(struct scene *scn, expo_scene_obj_iterator iter,
250 * expo_iter_scene_objects() - Iterate through all scene objects
252 * @exp: Expo to process
253 * @iter: Iterator to call on each object
254 * @priv: Private data to pass to the iterator, in addition to the object
255 * Return: 0 if OK, -ve on error
257 int expo_iter_scene_objs(struct expo *exp, expo_scene_obj_iterator iter,
261 * scene_menuitem_find() - Find the menu item for an ID
263 * Looks up the menu to find the item with the given ID
265 * @menu: Menu to check
266 * @id: ID to look for
267 * Return: Menu item, or NULL if not found
269 struct scene_menitem *scene_menuitem_find(const struct scene_obj_menu *menu,
273 * scene_menuitem_find_seq() - Find the menu item at a sequential position
275 * This numbers the items from 0 and returns the seq'th one
277 * @menu: Menu to check
278 * @seq: Sequence number to look for
279 * Return: menu item if found, else NULL
281 struct scene_menitem *scene_menuitem_find_seq(const struct scene_obj_menu *menu,
285 * scene_menuitem_find_val() - Find the menu item with a given value
287 * @menu: Menu to check
288 * @find_val: Value to look for
289 * Return: menu item if found, else NULL
291 struct scene_menitem *scene_menuitem_find_val(const struct scene_obj_menu *menu,
295 * scene_bbox_union() - update bouding box with the demensions of an object
297 * Updates @bbox so that it encompasses the bounding box of object @id
299 * @snd: Scene containing object
301 * @inset: Amount of inset to use for width
302 * @bbox: Bounding box to update
303 * Return: 0 if OK, -ve on error
305 int scene_bbox_union(struct scene *scn, uint id, int inset,
306 struct vidconsole_bbox *bbox);
309 * scene_textline_calc_dims() - Calculate the dimensions of a textline
311 * Updates the width and height of the textline based on its contents
313 * @tline: Textline to update
314 * Returns 0 if OK, -ENOTSUPP if there is no graphical console
316 int scene_textline_calc_dims(struct scene_obj_textline *tline);
319 * scene_menu_calc_bbox() - Calculate bounding boxes for the menu
321 * @menu: Menu to process
322 * @bbox: Returns bounding box of menu including prompts
323 * @label_bbox: Returns bounding box of labels
324 * Return: 0 if OK, -ve on error
326 void scene_menu_calc_bbox(struct scene_obj_menu *menu,
327 struct vidconsole_bbox *bbox,
328 struct vidconsole_bbox *label_bbox);
331 * scene_textline_calc_bbox() - Calculate bounding box for the textline
333 * @textline: Menu to process
334 * @bbox: Returns bounding box of textline including prompt
335 * @edit_bbox: Returns bounding box of editable part
336 * Return: 0 if OK, -ve on error
338 void scene_textline_calc_bbox(struct scene_obj_textline *menu,
339 struct vidconsole_bbox *bbox,
340 struct vidconsole_bbox *label_bbox);
343 * scene_obj_calc_bbox() - Calculate bounding boxes for an object
345 * @obj: Object to process
346 * @bbox: Returns bounding box of object including prompts
347 * @label_bbox: Returns bounding box of labels (active area)
348 * Return: 0 if OK, -ve on error
350 int scene_obj_calc_bbox(struct scene_obj *obj, struct vidconsole_bbox *bbox,
351 struct vidconsole_bbox *label_bbox);
354 * scene_textline_open() - Open a textline object
356 * Set up the text editor ready for use
358 * @scn: Scene containing the textline
359 * @tline: textline object
360 * Return: 0 if OK, -ve on error
362 int scene_textline_open(struct scene *scn, struct scene_obj_textline *tline);
365 * scene_textline_close() - Close a textline object
367 * Close out the text editor after use
369 * @scn: Scene containing the textline
370 * @tline: textline object
371 * Return: 0 if OK, -ve on error
373 int scene_textline_close(struct scene *scn, struct scene_obj_textline *tline);
376 * scene_calc_arrange() - Calculate sizes needed to arrange a scene
378 * Checks the size of some objects and stores this info to help with a later
381 * @scn: Scene to check
382 * @arr: Place to put scene-arrangement info
383 * Returns: 0 if OK, -ve on error
385 int scene_calc_arrange(struct scene *scn, struct expo_arrange_info *arr);
387 #endif /* __SCENE_INTERNAL_H */