feat(gui): add rule for cache children style

include/LCUI/gui/css_library.h

@@ -176,7 +176,7 @@ typedef struct LCUI_SelectorRec_ {
 	int rank;			/**< 权值，决定优先级 */
 	int batch_num;			/**< 批次号 */
 	int length;			/**< 选择器结点长度 */
-	unsigned int hash;		/**< 哈希值 */
+	unsigned hash;			/**< 哈希值 */
 	LCUI_SelectorNode *nodes;	/**< 选择器结点列表 */
 } LCUI_SelectorRec, *LCUI_Selector;
 

include/LCUI/gui/widget_base.h

@@ -124,6 +124,7 @@ typedef enum LCUI_WidgetState {
 
 typedef struct LCUI_WidgetRec_* LCUI_Widget;
 typedef struct LCUI_WidgetPrototypeRec_ *LCUI_WidgetPrototype;
+typedef struct LCUI_WidgetTaskContextRec_ *LCUI_WidgetTaskContext;
 typedef const struct LCUI_WidgetPrototypeRec_ *LCUI_WidgetPrototypeC;
 
 typedef void(*LCUI_WidgetFunction)(LCUI_Widget);
@@ -159,11 +160,21 @@ typedef struct LCUI_WidgetData_ {
 } LCUI_WidgetData;
 
 typedef struct LCUI_WidgetTaskContextRec_ {
-	LCUI_Selector selector;
-	LCUI_Widget widget;
-} LCUI_WidgetTaskContextRec, *LCUI_WidgetTaskContext;
+	Dict *style_cache;
+	unsigned style_hash;
+	LCUI_WidgetTaskContext parent;
+} LCUI_WidgetTaskContextRec;
 
 typedef struct LCUI_WidgetRulesRec_ {
+	/**
+	 * Cache the stylesheets of children to improve the query speed of
+	 * the stylesheet.
+	 * If this rule is enabled, we recommend that you manually call
+	 * Widget_GenerateHash() to generate a hash value for the children
+	 * of the widget.
+	 */
+	LCUI_BOOL cache_children_style;
+
 	/** Refresh the style of all child widgets if the status has changed */
 	LCUI_BOOL ignore_status_change;
 
@@ -185,6 +196,7 @@ typedef struct LCUI_WidgetRulesRec_ {
 
 typedef struct LCUI_WidgetRulesDataRec_ {
 	LCUI_WidgetRulesRec rules;
+	Dict *style_cache;
 	size_t default_max_update_count;
 	size_t current_index;
 } LCUI_WidgetRulesDataRec, *LCUI_WidgetRulesData;
@@ -203,6 +215,7 @@ typedef struct LCUI_WidgetAttributeRec_ {
 
 /** 部件结构 */
 typedef struct LCUI_WidgetRec_ {
+	unsigned		hash;			/**< 哈希值 */
 	LCUI_WidgetState	state;			/**< 状态 */
 	float			x, y;			/**< 当前坐标（由 origin 计算而来） */
 	float			origin_x, origin_y;	/**< 当前布局下计算出的坐标 */
@@ -401,6 +414,12 @@ LCUI_API void Widget_SetTitleW(LCUI_Widget w, const wchar_t *title);
 /** 为部件添加状态 */
 LCUI_API void Widget_AddState(LCUI_Widget w, LCUI_WidgetState state);
 
+/** Generate a hash for a widget to identify it and siblings */
+LCUI_API void Widget_GenerateSelfHash(LCUI_Widget w);
+
+/** Generate hash values for a widget and its children */
+LCUI_API void Widget_GenerateHash(LCUI_Widget w);
+
 /** Set widget updating rules */
 LCUI_API int Widget_SetRules(LCUI_Widget w, const LCUI_WidgetRulesRec *rules);
 

src/gui/widget_base.c

@@ -107,7 +107,6 @@ static void Widget_Init(LCUI_Widget widget)
 {
 	ZEROSET(widget, LCUI_Widget);
 	widget->state = LCUI_WSTATE_CREATED;
-	widget->trigger = EventTrigger();
 	widget->style = StyleSheet();
 	widget->computed_style.opacity = 1.0;
 	widget->computed_style.visible = TRUE;
@@ -271,12 +270,62 @@ void Widget_SetTitleW(LCUI_Widget w, const wchar_t *title)
 	Widget_AddTask(w, LCUI_WTASK_TITLE);
 }
 
+void Widget_GenerateSelfHash(LCUI_Widget widget)
+{
+	int i;
+	unsigned hash = 1080;
+	LCUI_Widget w;
+
+	for (w = widget; w; w = w->parent) {
+		if (w != widget) {
+			hash = strhash(hash, " ");
+		}
+		if (w->type) {
+			hash = strhash(hash, w->type);
+		} else {
+			hash = strhash(hash, "*");
+		}
+		if (w->id) {
+			hash = strhash(hash, "#");
+			hash = strhash(hash, w->id);
+		}
+		if (w->classes) {
+			for (i = 0; w->classes[i]; ++i) {
+				hash = strhash(hash, ".");
+				hash = strhash(hash, w->classes[i]);
+			}
+		}
+		if (w->status) {
+			for (i = 0; w->status[i]; ++i) {
+				hash = strhash(hash, ":");
+				hash = strhash(hash, w->status[i]);
+			}
+		}
+		if (w->rules && w->rules->cache_children_style) {
+			break;
+		}
+	}
+	widget->hash = hash;
+}
+
+void Widget_GenerateHash(LCUI_Widget w)
+{
+	LinkedListNode *node;
+
+	Widget_GenerateSelfHash(w);
+	for (LinkedList_Each(node, &w->children_show)) {
+		Widget_GenerateHash(node->data);
+	}
+}
+
 int Widget_SetRules(LCUI_Widget w, const LCUI_WidgetRulesRec *rules)
 {
 	LCUI_WidgetRulesData data;
 
-	if (w->rules) {
-		free(w->rules);
+	data = (LCUI_WidgetRulesData)w->rules;
+	if (data) {
+		Dict_Release(data->style_cache);
+		free(data);
 		w->rules = NULL;
 	}
 	if (!rules) {
@@ -288,6 +337,7 @@ int Widget_SetRules(LCUI_Widget w, const LCUI_WidgetRulesRec *rules)
 	}
 	data->rules = *rules;
 	data->current_index = 0;
+	data->style_cache = NULL;
 	data->default_max_update_count = 2048;
 	w->rules = (LCUI_WidgetRules)data;
 	return 0;

src/gui/widget_class.c

@@ -54,6 +54,11 @@ static int Widget_HandleClassesChange(LCUI_Widget w, const char *name)
 	if (w->rules && w->rules->ignore_classes_change) {
 		return 0;
 	}
+	/* If widget is not ready, indicate that the style of the children has
+	 * been marked needs to be refreshed */
+	if (w->state < LCUI_WSTATE_READY) {
+		return 1;
+	}
 	if (Widget_GetChildrenStyleChanges(w, 0, name) > 0) {
 		Widget_MarkChildrenRefreshByClasses(w);
 		return 1;

src/gui/widget_event.c

@@ -246,9 +246,11 @@ static void WidgetEventTranslator(LCUI_Event e, LCUI_WidgetEventPack pack)
 	handler->func(w, &pack->event, pack->data);
 	while (!pack->event.cancel_bubble && w->parent) {
 		w = w->parent;
-		pack->widget = w;
-		/** 向父级部件冒泡传递事件 */
-		EventTrigger_Trigger(w->trigger, e->type, pack);
+		if (w->trigger) {
+			pack->widget = w;
+			/** 向父级部件冒泡传递事件 */
+			EventTrigger_Trigger(w->trigger, e->type, pack);
+		}
 	}
 }
 
@@ -434,6 +436,9 @@ int Widget_BindEventById(LCUI_Widget widget, int event_id,
 	handler->func = func;
 	handler->data = data;
 	handler->destroy_data = destroy_data;
+	if (!widget->trigger) {
+		widget->trigger = EventTrigger();
+	}
 	return EventTrigger_Bind(widget->trigger, event_id,
 				 (LCUI_EventFunc)WidgetEventTranslator, handler,
 				 DestroyWidgetEventHandler);
@@ -507,9 +512,6 @@ static int Widget_TriggerEventEx(LCUI_Widget widget, LCUI_WidgetEventPack pack)
 {
 	LCUI_WidgetEvent e = &pack->event;
 
-	if (!widget->trigger) {
-		return -1;
-	}
 	pack->widget = widget;
 	switch (e->type) {
 	case LCUI_WEVENT_CLICK:
@@ -522,7 +524,8 @@ static int Widget_TriggerEventEx(LCUI_Widget widget, LCUI_WidgetEventPack pack)
 			break;
 		}
 	default:
-		if (0 < EventTrigger_Trigger(widget->trigger, e->type, pack)) {
+		if (widget->trigger && 0 <
+		    EventTrigger_Trigger(widget->trigger, e->type, pack)) {
 			return 0;
 		}
 		if (!widget->parent || e->cancel_bubble) {
@@ -534,7 +537,8 @@ static int Widget_TriggerEventEx(LCUI_Widget widget, LCUI_WidgetEventPack pack)
 	if (!widget->parent || e->cancel_bubble) {
 		return -1;
 	}
-	while (widget->computed_style.pointer_events == SV_NONE) {
+	while (widget->trigger &&
+	       widget->computed_style.pointer_events == SV_NONE) {
 		LCUI_Widget w;
 		LCUI_BOOL is_pointer_event = TRUE;
 		int pointer_x, pointer_y;
@@ -587,6 +591,7 @@ LCUI_BOOL Widget_PostEvent(LCUI_Widget widget, LCUI_WidgetEvent ev, void *data,
 	LCUI_Event sys_ev;
 	LCUI_TaskRec task;
 	LCUI_WidgetEventPack pack;
+
 	if (widget->state == LCUI_WSTATE_DELETED) {
 		return FALSE;
 	}
@@ -620,6 +625,7 @@ LCUI_BOOL Widget_PostEvent(LCUI_Widget widget, LCUI_WidgetEvent ev, void *data,
 int Widget_TriggerEvent(LCUI_Widget widget, LCUI_WidgetEvent e, void *data)
 {
 	LCUI_WidgetEventPackRec pack;
+
 	if (!e->target) {
 		e->target = widget;
 	}
@@ -1203,6 +1209,7 @@ int Widget_PostSurfaceEvent(LCUI_Widget w, int event_type, LCUI_BOOL sync_props)
 	int *data;
 	LCUI_WidgetEventRec e = { 0 };
 	LCUI_Widget root = LCUIWidget_GetRoot();
+
 	if (w->parent != root && w != root) {
 		return -1;
 	}
@@ -1221,13 +1228,16 @@ int Widget_PostSurfaceEvent(LCUI_Widget w, int event_type, LCUI_BOOL sync_props)
 void Widget_DestroyEventTrigger(LCUI_Widget w)
 {
 	LCUI_WidgetEventRec e = { LCUI_WEVENT_DESTROY, 0 };
+
 	Widget_TriggerEvent(w, &e, NULL);
 	Widget_ReleaseMouseCapture(w);
 	Widget_ReleaseTouchCapture(w, -1);
 	Widget_StopEventPropagation(w);
 	LCUIWidget_ClearEventTarget(w);
-	EventTrigger_Destroy(w->trigger);
-	w->trigger = NULL;
+	if (w->trigger) {
+		EventTrigger_Destroy(w->trigger);
+		w->trigger = NULL;
+	}
 }
 
 static void BindSysEvent(int e, LCUI_SysEventFunc func)

src/gui/widget_status.c

@@ -52,6 +52,9 @@ static void Widget_MarkChildrenRefreshByStatus(LCUI_Widget w)
 static int Widget_HandleStatusChange(LCUI_Widget w, const char *name)
 {
 	Widget_UpdateStyle(w, TRUE);
+	if (w->state < LCUI_WSTATE_READY) {
+		return 1;
+	}
 	if (w->rules && w->rules->ignore_status_change) {
 		return 0;
 	}
@@ -94,6 +97,7 @@ int Widget_RemoveStatus(LCUI_Widget w, const char *status_name)
 void Widget_UpdateStatus(LCUI_Widget widget)
 {
 	LCUI_Widget child;
+
 	if (!widget->parent) {
 		return;
 	}