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76 lines
2.1 KiB
Go
76 lines
2.1 KiB
Go
//go:build windows
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// +build windows
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package ffenestri
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import (
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"github.com/leaanthony/idgen"
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"github.com/wailsapp/wails/v2/internal/menumanager"
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"sync"
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)
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/**
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MenuCache
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---------
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When windows calls back to Go (when an item is clicked), we need to
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be able to retrieve information about the menu item:
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- The menu that the menuitem is part of (parent)
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- The original processed menu item
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- The type of the menu (application, context or tray)
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This cache is built up when a menu is created.
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*/
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// TODO: Make this like the other caches
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type menuCacheEntry struct {
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parent win32Menu
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menuType menuType
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item *menumanager.ProcessedMenuItem
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processedMenu *menumanager.ProcessedMenu
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}
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var idGenerator = idgen.New()
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var menuCache = map[win32MenuItemID]*menuCacheEntry{}
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var menuCacheLock sync.RWMutex
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var wailsMenuIDtoWin32IDMap = map[wailsMenuItemID]win32MenuItemID{}
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// This releases the menuIDs back to the id generator
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var winIDsOwnedByProcessedMenu = map[*menumanager.ProcessedMenu][]win32MenuItemID{}
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func releaseMenuIDsForProcessedMenu(processedMenu *menumanager.ProcessedMenu) {
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for _, menuID := range winIDsOwnedByProcessedMenu[processedMenu] {
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idGenerator.ReleaseID(uint(menuID))
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}
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delete(winIDsOwnedByProcessedMenu, processedMenu)
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}
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func addMenuCacheEntry(parent win32Menu, typ menuType, wailsMenuItem *menumanager.ProcessedMenuItem, processedMenu *menumanager.ProcessedMenu) win32MenuItemID {
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menuCacheLock.Lock()
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defer menuCacheLock.Unlock()
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id, err := idGenerator.NewID()
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checkFatal(err)
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menuID := win32MenuItemID(id)
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menuCache[menuID] = &menuCacheEntry{
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parent: parent,
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menuType: typ,
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item: wailsMenuItem,
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processedMenu: processedMenu,
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}
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// save the mapping
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wailsMenuIDtoWin32IDMap[wailsMenuItemID(wailsMenuItem.ID)] = menuID
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// keep track of menuids owned by this menu (so we can release the ids)
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winIDsOwnedByProcessedMenu[processedMenu] = append(winIDsOwnedByProcessedMenu[processedMenu], menuID)
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return menuID
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}
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func getMenuCacheEntry(id win32MenuItemID) *menuCacheEntry {
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menuCacheLock.Lock()
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defer menuCacheLock.Unlock()
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return menuCache[id]
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}
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