c3subtitles

autocompletion for c3subtitles!
当前为 2016-12-29 提交的版本，查看最新版本。
换行
// ==UserScript==
// @name         c3subtitles
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  autocompletion for c3subtitles!
// @author       You
// @match        https://live.c3subtitles.de/write/*
// @grant        none
// ==/UserScript==

(function() {
    var timesTyped = {};
    var completions = {};
    var isCompleted = {};
    
    window.setTimeout(function() {
        document.body.style.lineHeight = '1.5';
        var pendingArea = document.querySelector('div[style="display: flex; flex-direction: column-reverse;"]');
        pendingArea.style.padding = '2em 0 0 0';
        pendingArea.style.opacity = '0.6';
        pendingArea.style.fontStyle = 'italic';

        var field = document.querySelector('input');
        field.style.fontFamily = 'Roboto';
        field.style.fontSize = '16px';

        var parent = field.parentElement;
        parent.style.position = 'relative';

        var hint = document.createElement('span');
        hint.style.fontSize = '16px';
        hint.style.position = 'absolute';
        hint.style.left = field.offsetLeft + 'px';
        hint.style.top = field.offsetTop + 'px';
        hint.style.height = field.offsetHeight + 'px';
        hint.style.color = '#2c2';
        hint.style.pointerEvents = 'none';
        hint.style.textAlign = 'left';
        parent.appendChild(hint);

        var measure = document.createElement('span');
        measure.style.position = 'absolute';
        measure.style.opacity = '0';
        measure.style.fontSize = '16px';
        parent.appendChild(measure);
        
        function measureWidth(text) {
            measure.innerText = text;
            return measure.offsetWidth;
        }
        
        var inputEvent = new Event('input', { bubbles: true });
        var lastWord = '';
        
        var handleKeyDown = function(keyEvent) {
            if (keyEvent.keyCode === 9) {
                keyEvent.preventDefault();  // don't move focus
            }
            if (keyEvent.keyCode === 32 || keyEvent.keyCode === 13) {  // finished word
                var word = lastWord.replace(/[^a-zA-Z0-9\xc0-\xff]*$/, '');  // ignore trailing punctuation
                timesTyped[word] = (timesTyped[word] || 0) + 1;
                if (timesTyped[word] >= 2) {
                    for (var i = word.length - 1; i >= 2; i--) {
                        var prefix = word.substring(0, i);
                        var rest = word.substring(i);
                        completions[prefix] = rest;
                        if (isCompleted[prefix]) break;
                    }
                    isCompleted[word] = true;
                }
            }
        };
        var handleKeyUp = function(keyEvent) {
            lastWord = field.value.replace(/.* /, '');
            completion = completions[lastWord];
            if (keyEvent.keyCode === 9 && completion) {  // tab
                field.value += completion;
                field.dispatchEvent(inputEvent);  // make React notice the new text
                lastWord = field.value.replace(/.* /, '');  // maybe complete a longer word
                completion = completions[lastWord];
            }
            hint.innerText = completion || '';
            if (completion) {
                hint.style.left = (4 + measureWidth(field.value)) + 'px';
            }
        };
        document.addEventListener('keydown', handleKeyDown);
        document.addEventListener('keyup', handleKeyUp);
    }, 2000);
})();
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