MediaWiki:Gadget-SelectionCounter.js:修订间差异
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Maintenance script(留言 | 贡献) 确保 DOM 就绪后初始化 |
Maintenance script(留言 | 贡献) 增加轮询兜底以兼容未触发 selectionchange 的情况 |
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| 第22行: | 第22行: | ||
var rafId = null; |
var rafId = null; |
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var pollTimer = null; |
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var lastText = null; |
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function getSelectionText() { |
function getSelectionText() { |
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| 第35行: | 第37行: | ||
var active = document.activeElement; |
var active = document.activeElement; |
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if (active && (active.tagName === 'INPUT' || active.tagName === 'TEXTAREA' || active.isContentEditable)) { |
if (active && (active.tagName === 'INPUT' || active.tagName === 'TEXTAREA' || active.isContentEditable)) { |
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if (lastText !== null) { |
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lastText = null; |
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$counter.hide(); |
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} |
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return; |
return; |
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} |
} |
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| 第41行: | 第46行: | ||
var text = getSelectionText(); |
var text = getSelectionText(); |
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if (!text) { |
if (!text) { |
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if (lastText !== null) { |
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lastText = null; |
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$counter.hide(); |
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} |
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return; |
return; |
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} |
} |
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if (text === lastText) { |
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return; |
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} |
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lastText = text; |
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var count = Array.from(text).length; |
var count = Array.from(text).length; |
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$counter.text('已选 ' + count + ' 字').show(); |
$counter.text('已选 ' + count + ' 字').show(); |
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| 第54行: | 第67行: | ||
} |
} |
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rafId = window.requestAnimationFrame(updateCounter); |
rafId = window.requestAnimationFrame(updateCounter); |
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} |
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function startPolling() { |
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if (pollTimer) { |
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return; |
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} |
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pollTimer = window.setInterval(updateCounter, 500); |
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} |
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function stopPolling() { |
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if (!pollTimer) { |
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return; |
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} |
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window.clearInterval(pollTimer); |
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pollTimer = null; |
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} |
} |
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| 第60行: | 第88行: | ||
document.addEventListener('keyup', scheduleUpdate); |
document.addEventListener('keyup', scheduleUpdate); |
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document.addEventListener('touchend', scheduleUpdate, { passive: true }); |
document.addEventListener('touchend', scheduleUpdate, { passive: true }); |
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window.addEventListener('focus', startPolling); |
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window.addEventListener('blur', stopPolling); |
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document.addEventListener('visibilitychange', function () { |
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if (document.hidden) { |
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stopPolling(); |
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return; |
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} |
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startPolling(); |
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}); |
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startPolling(); |
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}); |
}); |
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}); |
}); |
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