306 lines
8.2 KiB
JavaScript
306 lines
8.2 KiB
JavaScript
let port = undefined;
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// Run the shellfox helper program.
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function initShellfoxProgram() {
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port = browser.runtime.connectNative("shellfox");
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if (!port)
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shellfoxFailed();
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else
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port.onDisconnect.addListener(shellfoxFailed);
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}
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// Display an error when we fail to launch Shellfox’es script.
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function shellfoxFailed() {
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let error = port.error;
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console.log(error);
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port = undefined;
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// Tell the user about the error…
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openNewTab("/html/error.html?error=" + escape(error));
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}
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function openNewTab(url) {
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browser.tabs.query({"active": true}).then((tabs) => {
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let openerTab = undefined;
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if (tabs && tabs.length > 0)
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openerTab = tabs[0].id;
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browser.tabs.create({
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"active": true,
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"url": url,
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"openerTabId": openerTab
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})
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});
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}
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// Given the name of an array saved to localStorage, return it (if possible).
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function savedArray(name) {
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try {
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let saved = JSON.parse(localStorage.getItem(name));
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return saved;
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} catch { return []; };
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}
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// Return the command-string associated with a URL, if any.
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function getUrlCommands(url) {
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let matchCommands = [];
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let matchRegex = "";
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try {
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let savedCommands = savedArray("commands");
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let savedRegexRules = savedArray("urlRules");
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// Find the most-applicable command…
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for (regexCommandIPair of savedRegexRules) {
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let regex = regexCommandIPair[0];
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let match = url.match(regex);
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let command_i = regexCommandIPair[1];
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let command = savedCommands[command_i][1];
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let compared = compareRegexComplexity(matchRegex, regex);
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if (match && (compared == 0 || compared == 1)) {
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matchCommands.unshift(savedCommands[command_i][1]);
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matchRegex = regex;
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} else if (match)
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matchCommands.push(command);
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}
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} catch {};
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if (matchCommands.length == 0)
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return undefined;
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return matchCommands;
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}
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// Return the download-command string (if any) associated with a URL and type
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// integer (0→started; 1→finished).
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function getDownloadCommand(url, type) {
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let matchCommand = undefined;
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let matchRegex = "";
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try {
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let savedDownloads = savedArray("downloadCommands");
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// Find the most-applicable command.
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for (regexCommandType of savedDownloads) {
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let regex = regexCommandType[0];
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let match = url.match(regex);
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let compared = compareRegexComplexity(matchRegex, regex);
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if ((match && (compared == 0 || compared == 1))
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&& (regexCommandType[2] == type))
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{
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matchCommand = regexCommandType[1];
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matchRegex = regex;
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}
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}
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} catch {};
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return matchCommand;
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}
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// Execute the given command string, subsituting “$URL” with url and
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// “$FILE” with filepath.
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function runCommand(command, url, filepath) {
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if (!port)
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initShellfoxProgram();
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if (command && port)
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port.postMessage(command
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.replaceAll("$URL", url)
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.replaceAll("${URL}", url)
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.replaceAll("$FILE", filepath)
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.replaceAll("${FILE}", filepath));
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}
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// Execute the shell command associated with the given URL, if any.
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function runUrlCommand(url) {
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let commands = getUrlCommands(url);
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if (commands)
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runCommand(commands[0], url);
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}
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// Compare two regular expressions, returning which one is more specific.
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// Returns -1 if a is more specific, 1 if b is, and 0 if they are equal.
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// It’s a simple (and unreliable) algorithm, for now — purely based on length.
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function compareRegexComplexity(a, b) {
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if (a && ((a && !b) || (a.length > b.length)))
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return -1;
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else if (b && ((b && !a) || (a.length < b.length)))
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return 1
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return 0;
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}
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// Display the “Run shell command” context-menu item.
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function showPageContextMenuItem() {
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browser.menus.update("run-page-command", { "visible": true });
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}
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// Display the “Run command on link” context-menu item.
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function showLinkContextMenuItem() {
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browser.menus.update("run-page-commands", { "visible": true });
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}
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// Hide the “Run shell command context-menu item.
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function hidePageContextMenuItem() {
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browser.menus.update("run-page-command", { "visible": false });
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}
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// Hide the “Run command on link” context-menu item.
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function hideLinkContextMenuItem() {
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browser.menus.update("run-page-commands", { "visible": false });
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}
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// (Re-)Create the menu-items for each context menu.
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function createCommandMenuItems() {
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let savedCommands = savedArray("commands") || [];
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for (let i = 0; i < savedCommands.length; i++) {
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let nameCommandPair = savedCommands[i];
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let name = nameCommandPair[0];
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let actionId = "run-pageaction-command-" + i;
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browser.menus.remove(actionId);
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browser.menus.create(
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{
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id: actionId,
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title: browser.i18n.getMessage("pageCommandContextMenu", name),
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contexts: ["page_action"]
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});
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let pageId = "run-page-command-" + i;
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browser.menus.remove(pageId);
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browser.menus.create(
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{
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id: pageId,
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title: browser.i18n.getMessage("pageCommandContextMenu", name),
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contexts: ["page"]
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});
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let linkId = "run-link-command-" + i;
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browser.menus.remove(linkId);
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browser.menus.create(
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{
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id: linkId,
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title: browser.i18n.getMessage("linkCommandContextMenu", name),
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contexts: ["link"]
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});
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}
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browser.menus.refresh();
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}
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// Add a context-menu item for running the current page’s associated command.
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browser.menus.create(
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{
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id: "run-page-command",
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title: browser.i18n.getMessage("pageCommandDefaultContextMenu"),
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contexts: ["page"]
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}
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);
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// Add a context-menu item for running the command associated with a link.
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browser.menus.create(
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{
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id: "run-link-command",
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title: browser.i18n.getMessage("linkCommandDefaultContextMenu"),
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contexts: ["link"]
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}
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);
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// When the address-bar button is clicked, run the according command (if any).
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browser.pageAction.onClicked.addListener((tab) => {
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runUrlCommand(tab.url);
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});
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// When a context-menu (right-click menu) is opened, only display the SHellfox
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// item if there is a configured command for that page.
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browser.menus.onShown.addListener(info => {
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if (info.contexts.includes("link") && getUrlCommands(info.linkUrl)) {
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showLinkContextMenuItem();
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} else if (info.contexts.includes("page") && getUrlCommands(info.pageUrl)) {
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showPageContextMenuItem();
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} else {
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hidePageContextMenuItem();
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hideLinkContextMenuItem();
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}
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browser.menus.refresh();
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});
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// When a tab’s URL has been changed, enable/disable the address-bar button
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// based on whether or not there is an according command.
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browser.tabs.onUpdated.addListener((tabId, changeInfo, tab) => {
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let command = getUrlCommands(tab.url);
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if (command)
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browser.pageAction.show(tabId);
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else
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browser.pageAction.hide(tabId);
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});
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// When the active tab has changed, enable/disable the address-bar button based
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// on whether or not there is an according command for it.
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browser.tabs.onActivated.addListener((activeInfo) => {
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browser.tabs.get(activeInfo.tabId).then((tab) => {
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if (getUrlCommands(tab.url))
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browser.pageAction.show(tab.id);
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else
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browser.pageAction.hide(tab.id);
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});
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});
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// When a context-menu item is selected, let’s execute its will!
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browser.menus.onClicked.addListener((info, tab) => {
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let itemName = info.menuItemId;
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if (itemName == "run-page-command")
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runUrlCommand(tab.url);
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else if (itemName == "run-link-command" && info.linkUrl)
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runUrlCommand(info.linkUrl);
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else if (itemName.startsWith("run-")) {
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let command_i = itemName.split("-command-")[1];
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runCommand(savedArray("commands")[command_i][1], info.linkUrl || tab.url);
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}
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});
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browser.browserAction.onClicked.addListener(() => {
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openNewTab("/html/options.html");
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});
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// When a download starts, run any applicable download commands.
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browser.downloads.onCreated.addListener((downloadItem) => {
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let command = getDownloadCommand(downloadItem.url, 0);
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if (command)
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runCommand(command, downloadItem.url, downloadItem.filename);
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});
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// When a download completes, run any applicable download commands.
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browser.downloads.onChanged.addListener((downloadDelta) => {
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browser.downloads.search({ "id": downloadDelta.id }).then((downloadItems) => {
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if (downloadDelta.state.current == "complete" && downloadItems.length > 0) {
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let command = getDownloadCommand(downloadItems[0].url, 1);
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if (command)
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runCommand(command, downloadItems[0].url, downloadItems[0].filename);
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}
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})
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});
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// Whenever settings (commands) are updated, repopulate context-menus’ items.
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window.addEventListener("storage", (e) => {
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createCommandMenuItems();
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});
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createCommandMenuItems();
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