diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 19:33:14 +0000 |
commit | 36d22d82aa202bb199967e9512281e9a53db42c9 (patch) | |
tree | 105e8c98ddea1c1e4784a60a5a6410fa416be2de /browser/components/sessionstore/RunState.sys.mjs | |
parent | Initial commit. (diff) | |
download | firefox-esr-upstream.tar.xz firefox-esr-upstream.zip |
Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | browser/components/sessionstore/RunState.sys.mjs | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/browser/components/sessionstore/RunState.sys.mjs b/browser/components/sessionstore/RunState.sys.mjs new file mode 100644 index 0000000000..94f9a86fcd --- /dev/null +++ b/browser/components/sessionstore/RunState.sys.mjs @@ -0,0 +1,92 @@ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this file, + * You can obtain one at http://mozilla.org/MPL/2.0/. */ + +const STATE_STOPPED = 0; +const STATE_RUNNING = 1; +const STATE_QUITTING = 2; +const STATE_CLOSING = 3; +const STATE_CLOSED = 4; + +// We're initially stopped. +var state = STATE_STOPPED; + +/** + * This module keeps track of SessionStore's current run state. We will + * always start out at STATE_STOPPED. After the session was read from disk and + * the initial browser window has loaded we switch to STATE_RUNNING. On the + * first notice that a browser shutdown was granted we switch to STATE_QUITTING. + */ +export var RunState = Object.freeze({ + // If we're stopped then SessionStore hasn't been initialized yet. As soon + // as the session is read from disk and the initial browser window has loaded + // the run state will change to STATE_RUNNING. + get isStopped() { + return state == STATE_STOPPED; + }, + + // STATE_RUNNING is our default mode of operation that we'll spend most of + // the time in. After the session was read from disk and the first browser + // window has loaded we remain running until the browser quits. + get isRunning() { + return state == STATE_RUNNING; + }, + + // We will enter STATE_QUITTING as soon as we receive notice that a browser + // shutdown was granted. SessionStore will use this information to prevent + // us from collecting partial information while the browser is shutting down + // as well as to allow a last single write to disk and block all writes after + // that. + get isQuitting() { + return state >= STATE_QUITTING; + }, + + // We will enter STATE_CLOSING as soon as SessionStore is uninitialized. + // The SessionFile module will know that a last write will happen in this + // state and it can do some necessary cleanup. + get isClosing() { + return state == STATE_CLOSING; + }, + + // We will enter STATE_CLOSED as soon as SessionFile has written to disk for + // the last time before shutdown and will not accept any further writes. + get isClosed() { + return state == STATE_CLOSED; + }, + + // Switch the run state to STATE_RUNNING. This must be called after the + // session was read from, the initial browser window has loaded and we're + // now ready to restore session data. + setRunning() { + if (this.isStopped) { + state = STATE_RUNNING; + } + }, + + // Switch the run state to STATE_CLOSING. This must be called *before* the + // last SessionFile.write() call so that SessionFile knows we're closing and + // can do some last cleanups and write a proper sessionstore.js file. + setClosing() { + if (this.isQuitting) { + state = STATE_CLOSING; + } + }, + + // Switch the run state to STATE_CLOSED. This must be called by SessionFile + // after the last write to disk was accepted and no further writes will be + // allowed. Any writes after this stage will cause exceptions. + setClosed() { + if (this.isClosing) { + state = STATE_CLOSED; + } + }, + + // Switch the run state to STATE_QUITTING. This should be called once we're + // certain that the browser is going away and before we start collecting the + // final window states to save in the session file. + setQuitting() { + if (this.isRunning) { + state = STATE_QUITTING; + } + }, +}); |