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/* -*- Mode: indent-tabs-mode: nil; js-indent-level: 2 -*- */
/* vim: set sts=2 sw=2 et tw=80: */
"use strict";
// If id is not specified for an item we use an integer.
// This ID need only be unique within a single addon. Since all addon code that
// can use this API runs in the same process, this local variable suffices.
var gNextMenuItemID = 0;
// Map[Extension -> Map[string or id, ContextMenusClickPropHandler]]
var gPropHandlers = new Map();
// The contextMenus API supports an "onclick" attribute in the create/update
// methods to register a callback. This class manages these onclick properties.
class ContextMenusClickPropHandler {
constructor(context) {
this.context = context;
// Map[string or integer -> callback]
this.onclickMap = new Map();
this.dispatchEvent = this.dispatchEvent.bind(this);
}
// A listener on contextMenus.onClicked that forwards the event to the only
// listener, if any.
dispatchEvent(info, tab) {
let onclick = this.onclickMap.get(info.menuItemId);
if (onclick) {
// No need for runSafe or anything because we are already being run inside
// an event handler -- the event is just being forwarded to the actual
// handler.
onclick(info, tab);
}
}
// Sets the `onclick` handler for the given menu item.
// The `onclick` function MUST be owned by `this.context`.
setListener(id, onclick) {
if (this.onclickMap.size === 0) {
this.context.childManager.getParentEvent("contextMenus.onClicked").addListener(this.dispatchEvent);
this.context.callOnClose(this);
}
this.onclickMap.set(id, onclick);
let propHandlerMap = gPropHandlers.get(this.context.extension);
if (!propHandlerMap) {
propHandlerMap = new Map();
} else {
// If the current callback was created in a different context, remove it
// from the other context.
let propHandler = propHandlerMap.get(id);
if (propHandler && propHandler !== this) {
propHandler.unsetListener(id);
}
}
propHandlerMap.set(id, this);
gPropHandlers.set(this.context.extension, propHandlerMap);
}
// Deletes the `onclick` handler for the given menu item.
// The `onclick` function MUST be owned by `this.context`.
unsetListener(id) {
if (!this.onclickMap.delete(id)) {
return;
}
if (this.onclickMap.size === 0) {
this.context.childManager.getParentEvent("contextMenus.onClicked").removeListener(this.dispatchEvent);
this.context.forgetOnClose(this);
}
let propHandlerMap = gPropHandlers.get(this.context.extension);
propHandlerMap.delete(id);
if (propHandlerMap.size === 0) {
gPropHandlers.delete(this.context.extension);
}
}
// Deletes the `onclick` handler for the given menu item, if any, regardless
// of the context where it was created.
unsetListenerFromAnyContext(id) {
let propHandlerMap = gPropHandlers.get(this.context.extension);
let propHandler = propHandlerMap && propHandlerMap.get(id);
if (propHandler) {
propHandler.unsetListener(id);
}
}
// Remove all `onclick` handlers of the extension.
deleteAllListenersFromExtension() {
let propHandlerMap = gPropHandlers.get(this.context.extension);
if (propHandlerMap) {
for (let [id, propHandler] of propHandlerMap) {
propHandler.unsetListener(id);
}
}
}
// Removes all `onclick` handlers from this context.
close() {
for (let id of this.onclickMap.keys()) {
this.unsetListener(id);
}
}
}
extensions.registerSchemaAPI("contextMenus", "addon_child", context => {
let onClickedProp = new ContextMenusClickPropHandler(context);
return {
contextMenus: {
create(createProperties, callback) {
if (createProperties.id === null) {
createProperties.id = ++gNextMenuItemID;
}
let {onclick} = createProperties;
delete createProperties.onclick;
context.childManager.callParentAsyncFunction("contextMenus.createInternal", [
createProperties,
]).then(() => {
if (onclick) {
onClickedProp.setListener(createProperties.id, onclick);
}
if (callback) {
callback();
}
});
return createProperties.id;
},
update(id, updateProperties) {
let {onclick} = updateProperties;
delete updateProperties.onclick;
return context.childManager.callParentAsyncFunction("contextMenus.update", [
id,
updateProperties,
]).then(() => {
if (onclick) {
onClickedProp.setListener(id, onclick);
} else if (onclick === null) {
onClickedProp.unsetListenerFromAnyContext(id);
}
// else onclick is not set so it should not be changed.
});
},
remove(id) {
onClickedProp.unsetListenerFromAnyContext(id);
return context.childManager.callParentAsyncFunction("contextMenus.remove", [
id,
]);
},
removeAll() {
onClickedProp.deleteAllListenersFromExtension();
return context.childManager.callParentAsyncFunction("contextMenus.removeAll", []);
},
},
};
});
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