~glacambre/firenvim

ref: 4907b8d3554aae7f7f2c298a73f7f512f0ead2ed firenvim/src/background.ts -rw-r--r-- 10.5 KiB
4907b8d3glacambre Improve testsuite 2 years ago
                                                                                
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
/**
 * Browser extensions have multiple processes. This is the entry point for the
 * [background process](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/Anatomy_of_a_WebExtension#Background_scripts).
 * Our background process has multiple tasks:
 * - Keep track of per-tab values with its setTabValue/getTabValue functions
 * - Set the [browserActions](https://developer.mozilla.org/en-US/docs/Mozilla/Add-ons/WebExtensions/API/browserAction)'s icon.
 * - Keep track of error messages/warnings that should are displayed in the
 *   browserAction.
 * - Update settings when the user changes their vimrc.
 * - Start new neovim instances when asked by a content script.
 * - Provide an RPC mechanism that enables calling background APIs from the
 *   browserAction/content script.
 *
 * The background process mostly acts as a slave for the browserAction and
 * content scripts. It rarely acts on its own.
 */
import * as browser from "webextension-polyfill";
import { ISiteConfig } from "./utils/configuration";
import { getIconImageData, IconKind } from "./utils/utils";

// We can't use the sessions.setTabValue/getTabValue apis firefox has because
// chrome doesn't support them. Instead, we create a map of tabid => {} kept in
// the background. This has the disadvantage of not surviving browser restarts,
// but's it's cross platform.
const tabValues = new Map();
function setTabValue(tabid: any, item: any, value: any) {
    let obj = tabValues.get(tabid);
    if (obj === undefined) {
        obj = {};
        tabValues.set(tabid, obj);
    }
    obj[item] = value;
}
function getTabValue(tabid: any, item: any) {
    const obj = tabValues.get(tabid);
    if (obj === undefined) {
        return undefined;
    }
    return obj[item];
}

async function updateIcon(tabId?: number) {
    let name: IconKind = "normal";
    if (tabId === undefined) {
        tabId = (await browser.tabs.query({ active: true, currentWindow: true }))[0].id;
    }
    if (getTabValue(tabId, "disabled") === "true") {
        name = "disabled";
    } else if (error !== "") {
        name = "error";
    } else if (warning !== "") {
        name = "notification";
    }
    return getIconImageData(name).then((imageData: any) => browser.browserAction.setIcon({ imageData }));
}

// Os is win/mac/linux/androis/cros. We only use it to add information to error
// messages on windows.
let os = "";
browser.runtime.getPlatformInfo().then((plat: any) => os = plat.os);

// Last error message
let error = "";

// Simple getter for easy RPC calls
function getError() {
    return error;
}

function registerErrors(nvim: any, reject: any) {
    error = "";
    const timeout = setTimeout(() => {
        nvim.timedOut = true;
        error = "Neovim is not responding.";
        updateIcon();
        nvim.disconnect();
        reject(error);
    }, 10000);
    nvim.onDisconnect.addListener(async (p: any) => {
        clearTimeout(timeout);
        updateIcon();
        if (p.error) {
            const errstr = p.error.toString();
            if (errstr.match(/no such native application/i)) {
                error = "Native manifest not found. Please run `:call firenvim#install(0)` in neovim.";
            } else if (errstr.match(/an unexpected error occurred/i)) {
                error = "The script supposed to start neovim couldn't be found."
                    + " Please run `:call firenvim#install(0)` in neovim";
                if (os === "win") {
                    error += " or try running the scripts in %LOCALAPPDATA%\\firenvim\\";
                }
                error += ".";
            } else {
                error = errstr;
            }
            updateIcon();
            reject(p.error);
        } else if (!nvim.replied && !nvim.timedOut) {
            error = "Neovim died without answering.";
            updateIcon();
            reject(error);
        }
    });
    return timeout;
}

// Last warning message
let warning = "";
function getWarning() {
    return warning;
}
let nvimPluginVersion = "";
async function checkVersion(nvimVersion: string) {
    nvimPluginVersion = nvimVersion;
    const manifest = browser.runtime.getManifest();
    warning = "";
    if (manifest.version !== nvimVersion) {
        warning = `Neovim plugin version (${nvimVersion}) and firefox addon `
            + `version (${manifest.version}) do not match.`;
    }
    updateIcon();
}

// Function called in order to fill out default settings. Called from updateSettings.
function applySettings(settings: any) {
    function makeDefaults(obj: { [key: string]: any }, name: string, value: any) {
        if (obj[name] === undefined) {
            obj[name] = value;
        }
    }
    function makeDefaultLocalSetting(sett: { localSettings: { [key: string]: any } },
                                     site: string,
                                     conf: ISiteConfig) {
        makeDefaults(sett.localSettings, site, {});
        for (const key of (Object.keys(conf) as Array<keyof typeof conf>)) {
            makeDefaults(sett.localSettings[site], key, conf[key]);
        }
    }
    if (settings === undefined) {
        settings = {};
    }

    makeDefaults(settings, "globalSettings", {});
    // "alt": "all" | "alphanum"
    // #202: Only register alt key on alphanums to let swedish osx users type
    //       special chars
    if (os === "mac") {
        makeDefaults(settings.globalSettings, "alt", "alphanum");
    } else {
        makeDefaults(settings.globalSettings, "alt", "all");
    }

    makeDefaults(settings, "localSettings", {});
    makeDefaultLocalSetting(settings, ".*", {
        // "cmdline": "neovim" | "firenvim"
        // #168: Use an external commandline to preserve space
        cmdline: "neovim",
        priority: 0,
        selector: 'textarea, div[role="textbox"]',
        // "takeover": "always" | "once" | "empty" | "nonempty" | "never"
        // #265: On "once", don't automatically bring back after :q'ing it
        takeover: "always",
    });
    browser.storage.local.set(settings);
}

function fetchSettings() {
    return new Promise((resolve, reject) => {
        const nvim = browser.runtime.connectNative("firenvim");
        const errorTimeout = registerErrors(nvim, reject);
        nvim.onMessage.addListener((resp: any) => {
            nvim.replied = true;
            clearTimeout(errorTimeout);
            checkVersion(resp.version);
            resolve(resp.settings);
            nvim.disconnect();
        });
        nvim.postMessage({
            newInstance: false,
        });
    });
}

function updateSettings() {
    return fetchSettings().then(applySettings);
}

function createNewInstance() {
    return new Promise((resolve, reject) => {
        const password = new Uint32Array(1);
        window.crypto.getRandomValues(password);

        const nvim = browser.runtime.connectNative("firenvim");
        const errorTimeout = registerErrors(nvim, reject);
        nvim.onMessage.addListener((resp: any) => {
            nvim.replied = true;
            clearTimeout(errorTimeout);
            checkVersion(resp.version);
            applySettings(resp.settings);
            resolve({ password: password[0], port: resp.port });
        });
        nvim.postMessage({
            newInstance: true,
            password: password[0],
        });
    });
}

async function toggleDisabled() {
    const tabId = (await browser.tabs.query({ active: true, currentWindow: true }))[0].id;
    const tabValue = getTabValue(tabId, "disabled");
    const disabled = !JSON.parse((tabValue as string) || "false");
    setTabValue(tabId, "disabled", `${disabled}`);
    updateIcon(tabId);
    return browser.tabs.sendMessage(tabId, { args: [disabled], funcName: ["setDisabled"] });
}

// Creating this first instance serves two purposes: make creating new neovim
// frames fast and also initialize settings the first time Firenvim is enabled
// in a browser.
let preloadedInstance = createNewInstance();

Object.assign(window, {
    // We need to stick the browser polyfill in `window` if we want the `exec`
    // call to be able to find it on Chrome
    browser,
    exec: (sender: any, args: any) => args.funcName.reduce((acc: any, cur: string) => acc[cur], window)(...(args.args)),
    getError,
    getNewNeovimInstance: (sender: any, args: any) => {
        const result = preloadedInstance;
        preloadedInstance = createNewInstance();
        return result;
    },
    getNvimPluginVersion: () => nvimPluginVersion,
    getTab: (sender: any, args: any) => sender.tab,
    getTabValue: (sender: any, args: any) => getTabValue(sender.tab.id, args[0]),
    getTabValueFor: (sender: any, args: any) => getTabValue(args[0], args[1]),
    getWarning,
    messageOwnTab: (sender: any, args: any) => browser.tabs.sendMessage(sender.tab.id, args),
    messageTab: (sender: any, args: any) => browser.tabs.sendMessage(args[0], args.slice(1)),
    setTabValue: (sender: any, args: any) => setTabValue(sender.tab.id, args[0], args[1]),
    toggleDisabled: (sender: any, args: any) => toggleDisabled(),
    updateSettings: (sender: any, args: any) => updateSettings(),
} as any);

browser.runtime.onMessage.addListener(async (request: any, sender: any, sendResponse: any) => {
    const fn = request.funcName.reduce((acc: any, cur: string) => acc[cur], window);
    if (!fn) {
        throw new Error(`Error: unhandled content request: ${JSON.stringify(request)}.`);
    }
    return fn(sender, request.args !== undefined ? request.args : []);
});

browser.tabs.onActivated.addListener(({ tabId }: { tabId: number }) => {
    updateIcon(tabId);
});
browser.windows.onFocusChanged.addListener(async (windowId: number) => {
    const tabs = await browser.tabs.query({ active: true, windowId });
    if (tabs.length >= 1) {
        updateIcon(tabs[0].id);
    }
});

updateIcon();

browser.commands.onCommand.addListener(async (command: string) => {
    switch (command) {
        case "focus_input":
            browser.tabs.sendMessage(
                (await browser.tabs.query({ active: true, currentWindow: true }))[0].id,
                { args: [], funcName: ["focusInput"] },
            );
            break;
        case "focus_page":
            browser.tabs.sendMessage(
                (await browser.tabs.query({ active: true, currentWindow: true }))[0].id,
                { args: [], funcName: ["focusPage"] },
            );
            break;
        case "nvimify":
            browser.tabs.sendMessage(
                (await browser.tabs.query({ active: true, currentWindow: true }))[0].id,
                { args: [], funcName: ["forceNvimify"] },
            );
            break;
        case "toggle_firenvim":
            await toggleDisabled();
            break;
    }
});