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108 lines
3.1 KiB
108 lines
3.1 KiB
window.initSoftKeyboard = function (screen, input) {
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const keyInput = qs('#softkb-input')
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if (!keyInput) return // abort, we're not on the terminal page
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let keyboardOpen = false
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let updateInputPosition = function () {
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if (!keyboardOpen) return
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let [x, y] = screen.gridToScreen(screen.cursor.x, screen.cursor.y, true)
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keyInput.style.transform = `translate(${x}px, ${y}px)`
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}
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keyInput.addEventListener('focus', () => {
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keyboardOpen = true
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updateInputPosition()
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})
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keyInput.addEventListener('blur', () => (keyboardOpen = false))
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screen.on('cursor-moved', updateInputPosition)
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window.kbOpen = function openSoftKeyboard (open) {
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keyboardOpen = open
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updateInputPosition()
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if (open) keyInput.focus()
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else keyInput.blur()
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}
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// Chrome for Android doesn't send proper keydown/keypress events with
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// real key values instead of 229 “Unidentified,” so here's a workaround
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// that deals with the input composition events.
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let lastCompositionString = ''
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let compositing = false
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// sends the difference between the last and the new composition string
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let sendInputDelta = function (newValue) {
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let resend = false
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if (newValue.length > lastCompositionString.length) {
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if (newValue.startsWith(lastCompositionString)) {
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// characters have been added at the end
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input.sendString(newValue.substr(lastCompositionString.length))
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} else resend = true
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} else if (newValue.length < lastCompositionString.length) {
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if (lastCompositionString.startsWith(newValue)) {
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// characters have been removed at the end
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input.sendString('\b'.repeat(lastCompositionString.length -
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newValue.length))
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} else resend = true
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} else if (newValue !== lastCompositionString) resend = true
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if (resend) {
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// the entire string changed; resend everything
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input.sendString('\b'.repeat(lastCompositionString.length) +
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newValue)
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}
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lastCompositionString = newValue
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}
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keyInput.addEventListener('keydown', e => {
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if (e.key === 'Unidentified') return
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keyInput.value = ''
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if (e.key === 'Backspace') {
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e.preventDefault()
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input.sendString('\b')
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} else if (e.key === 'Enter') {
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e.preventDefault()
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input.sendString('\x0d')
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}
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})
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keyInput.addEventListener('keypress', e => {
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// prevent key duplication on iOS (because Safari *does* send proper events)
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e.stopPropagation()
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})
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keyInput.addEventListener('input', e => {
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e.stopPropagation()
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if (e.isComposing) {
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sendInputDelta(e.data)
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} else {
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if (e.inputType === 'insertCompositionText') input.sendString(e.data)
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else if (e.inputType === 'deleteContentBackward') {
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lastCompositionString = ''
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sendInputDelta('')
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} else if (e.inputType === 'insertText') {
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input.sendString(e.data)
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}
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}
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})
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keyInput.addEventListener('compositionstart', e => {
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lastCompositionString = ''
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compositing = true
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})
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keyInput.addEventListener('compositionend', e => {
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lastCompositionString = ''
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compositing = false
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keyInput.value = ''
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})
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screen.on('open-soft-keyboard', () => keyInput.focus())
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}
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