Function messageHandler

wvbrowser_ui/controls_ui/default.js:10–168

};

const messageHandler = event => {
    var message = event.data.message;
    var args = event.data.args;

    switch (message) {
        case commands.MG_UPDATE_URI:
            if (isValidTabId(args.tabId)) {
                const tab = tabs.get(args.tabId);
                let previousURI = tab.uri;

                // Update the tab state
                tab.uri = args.uri;
                tab.uriToShow = args.uriToShow;
                tab.canGoBack = args.canGoBack;
                tab.canGoForward = args.canGoForward;

                // If the tab is active, update the controls UI
                if (args.tabId == activeTabId) {
                    updateNavigationUI(message);
                }

                isFavorite(tab.uri, (isFavorite) => {
                    tab.isFavorite = isFavorite;
                    updateFavoriteIcon();
                });

                // Don't add history entry if URI has not changed
                if (tab.uri == previousURI) {
                    break;
                }

                // Filter URIs that should not appear in history
                if (!tab.uri || tab.uri == 'about:blank') {
                    tab.historyItemId = INVALID_HISTORY_ID;
                    break;
                }

                if (tab.uriToShow && tab.uriToShow.substring(0, 10) == 'browser://') {
                    tab.historyItemId = INVALID_HISTORY_ID;
                    break;
                }

                addHistoryItem(historyItemFromTab(args.tabId), (id) => {
                    tab.historyItemId = id;
                });
            }
            break;
        case commands.MG_NAV_STARTING:
            if (isValidTabId(args.tabId)) {
                // Update the tab state
                tabs.get(args.tabId).isLoading = true;

                // If the tab is active, update the controls UI
                if (args.tabId == activeTabId) {
                    updateNavigationUI(message);
                }
            }
            break;