signal-desktop/preload.js
2017-09-14 16:53:45 -07:00

83 lines
3.1 KiB
JavaScript

(function () {
'use strict';
console.log('preload');
const electron = require('electron')
window.config = require('url').parse(window.location.toString(), true).query;
const ipc = electron.ipcRenderer
window.config.locale_json = ipc.sendSync('locale-data');
window.setBadgeCount = function(count) {
ipc.send('set-badge-count', count);
};
window.drawAttention = function() {
console.log('draw attention');
ipc.send('draw-attention');
};
window.showWindow = function() {
console.log('show window');
ipc.send('show-window');
};
window.restart = function() {
console.log('restart');
ipc.send('restart');
};
/**
* Enables spell-checking and the right-click context menu in text editors.
* Electron (`webFrame.setSpellCheckProvider`) only underlines misspelled words;
* we must manage the menu ourselves.
*
* Run this in the renderer process.
*/
var remote = electron.remote;
var webFrame = electron.webFrame;
var SpellCheckProvider = require('electron-spell-check-provider');
// `remote.require` since `Menu` is a main-process module.
var buildEditorContextMenu = remote.require('electron-editor-context-menu');
var selection;
function resetSelection() {
selection = {
isMisspelled: false,
spellingSuggestions: []
};
}
resetSelection();
// Reset the selection when clicking around, before the spell-checker runs and the context menu shows.
window.addEventListener('mousedown', resetSelection);
// The spell-checker runs when the user clicks on text and before the 'contextmenu' event fires.
// Thus, we may retrieve spell-checking suggestions to put in the menu just before it shows.
webFrame.setSpellCheckProvider(
'en-US',
// Not sure what this parameter (`autoCorrectWord`) does: https://github.com/atom/electron/issues/4371
// The documentation for `webFrame.setSpellCheckProvider` passes `true` so we do too.
true,
new SpellCheckProvider('en-US').on('misspelling', function(suggestions) {
// Prime the context menu with spelling suggestions _if_ the user has selected text. Electron
// may sometimes re-run the spell-check provider for an outdated selection e.g. if the user
// right-clicks some misspelled text and then an image.
if (window.getSelection().toString()) {
selection.isMisspelled = true;
// Take the first three suggestions if any.
selection.spellingSuggestions = suggestions.slice(0, 3);
}
}));
window.addEventListener('contextmenu', function(e) {
// Only show the context menu in text editors.
if (!e.target.closest('textarea, input, [contenteditable="true"]')) return;
var menu = buildEditorContextMenu(selection);
// The 'contextmenu' event is emitted after 'selectionchange' has fired but possibly before the
// visible selection has changed. Try to wait to show the menu until after that, otherwise the
// visible selection will update after the menu dismisses and look weird.
setTimeout(function() {
menu.popup(remote.getCurrentWindow());
}, 30);
});
})();