88 lines
2.4 KiB
Plaintext
88 lines
2.4 KiB
Plaintext
// Emacs-style input handler
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// Converts raw input with modifiers to standard emacs notation
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// Valid keys for emacs bindings - only process these
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var valid_keys = [
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'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm',
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'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z',
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'return', 'enter', 'space', 'escape', 'tab', 'backspace', 'delete',
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'up', 'down', 'left', 'right', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'
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]
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var action = {}
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action.prefix_key = null // Current prefix key (C-x or C-c)
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action.on_input = function(action_id, action_data)
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{
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if (!action_data.pressed) return
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if (find(valid_keys, action_id) == null)
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return
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// Only process key events with modifiers or if we're waiting for a prefix continuation
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if (!action_data.ctrl && !action_data.alt && !this.prefix_key)
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return
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var emacs_notation = ""
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// Build emacs notation
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if (action_data.ctrl)
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emacs_notation += "C-"
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if (action_data.alt)
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emacs_notation += "M-"
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// Convert action_id to emacs key notation
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var key = action_id
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if (length(key) == 1) {
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// Single character keys
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emacs_notation += lower(key)
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} else {
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// Handle special keys
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if (key == 'return' || key == 'enter') {
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emacs_notation += "RET"
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} else if (key == 'space') {
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emacs_notation += "SPC"
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} else if (key == 'escape') {
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emacs_notation += "ESC"
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} else if (key == 'tab') {
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emacs_notation += "TAB"
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} else if (key == 'backspace') {
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emacs_notation += "DEL"
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} else if (key == 'delete') {
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emacs_notation += "delete"
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} else if (key == 'up') {
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emacs_notation += "up"
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} else if (key == 'down') {
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emacs_notation += "down"
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} else if (key == 'left') {
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emacs_notation += "left"
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} else if (key == 'right') {
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emacs_notation += "right"
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} else {
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emacs_notation += key
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}
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}
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// Handle prefix keys C-x and C-c
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if (emacs_notation == "C-x" || emacs_notation == "C-c") {
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this.prefix_key = emacs_notation
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return
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}
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// If we have a prefix key, build the full command
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var full_command = null
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if (this.prefix_key) {
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full_command = this.prefix_key + " " + emacs_notation
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this.prefix_key = null // Reset prefix key
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// scene.recurse(game.root, 'on_input', [full_command, action_data])
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} else {
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// scene.recurse(game.root, 'on_input', [emacs_notation, action_data])
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}
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}
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return function()
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{
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var obj = meme(action)
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return obj
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}
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