mirror of
https://github.com/flynx/ImageGrid.git
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796 lines
21 KiB
JavaScript
Executable File
796 lines
21 KiB
JavaScript
Executable File
/**********************************************************************
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*
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*
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*
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**********************************************************************/
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//var DEBUG = DEBUG != null ? DEBUG : true
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/*********************************************************************/
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// Attributes to be ignored my the key handler...
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//
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// These are used for system tasks.
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var KEYBOARD_SYSTEM_ATTRS = [
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'doc',
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'title',
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'ignore',
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'pattern'
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]
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// Neither _SPECIAL_KEYS nor _KEY_CODES are meant for direct access, use
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// toKeyName(<code>) and toKeyCode(<name>) for a more uniform access.
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//
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// NOTE: these are un-shifted ASCII key names rather than actual key
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// code translations.
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// NOTE: ASCII letters (capital) are not present because they actually
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// match their key codes and are accessible via:
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// String.fromCharCode(<code>) or <letter>.charCodeAt(0)
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// NOTE: the lower case letters are accessible by adding 32 to the
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// capital key code.
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// NOTE: don't understand why am I the one who has to write this...
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var _SPECIAL_KEYS = {
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// Special Keys...
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9: 'Tab', 33: 'PgUp', 45: 'Ins',
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13: 'Enter', 34: 'PgDown', 46: 'Del',
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16: 'Shift', 35: 'End', 8: 'Backspace',
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17: 'Ctrl', 36: 'Home', 91: 'Win',
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18: 'Alt', 37: 'Left', 93: 'Menu',
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20: 'Caps Lock',38: 'Up',
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27: 'Esc', 39: 'Right',
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32: 'Space', 40: 'Down',
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// Function Keys...
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112: 'F1', 116: 'F5', 120: 'F9',
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113: 'F2', 117: 'F6', 121: 'F10',
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114: 'F3', 118: 'F7', 122: 'F11',
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115: 'F4', 119: 'F8', 123: 'F12',
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// Number row..
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// NOTE: to avoid conflicts with keys that have a code the same as
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// the value of a number key...
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// Ex:
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// 'Backspace' (8) vs. '8' (56)
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// 'Tab' (9) vs. '9' (57)
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// ...all of the numbers start with a '#'
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// this is a problem due to JS coercing the types to string
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// on object attr access.
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// Ex:
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// o = {1: 2}
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// o[1] == o['1'] == true
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49: '#1', 50: '#2', 51: '#3', 52: '#4', 53: '#5',
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54: '#6', 55: '#7', 56: '#8', 57: '#9', 48: '#0',
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// Punctuation...
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// top row...
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192: '`', /* Numbers */ 189: '-', 187: '=',
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// right side of keyboard...
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219: '[', 221: ']', 220: '\\',
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186: ';', 222: '\'',
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188: ',', 190: '.', 191: '/',
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}
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var _SHIFT_KEYS = {
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'`': '~', '-': '_', '=':'+',
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1: '!', 2: '@', 3: '#', 4: '$', 5: '%',
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6:'^', 7:'&', 8: '*', 9: '(', 0: ')',
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'[': '{', ']': '}', '\\': '|',
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';': ':', '\'': '"',
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',': '<', '.': '>', '/': '?'
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}
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// build a reverse map of _SPECIAL_KEYS
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var _KEY_CODES = {}
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for(var k in _SPECIAL_KEYS){
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_KEY_CODES[_SPECIAL_KEYS[k]] = k
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}
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// XXX some keys look really wrong...
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function toKeyName(code){
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// check for special keys...
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var k = _SPECIAL_KEYS[code]
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if(k != null){
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return k
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}
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// chars...
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k = String.fromCharCode(code)
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if(k != ''){
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//return k.toLowerCase()
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return k
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}
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return null
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}
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function toKeyCode(c){
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if(c in _KEY_CODES){
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return _KEY_CODES[c]
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}
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return c.charCodeAt(0)
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}
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// documentation wrapper...
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function doc(text, func){
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func = !func ? function(){return true}: func
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func.doc = text
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return func
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}
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// Build or normalize a modifier string.
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//
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// Acceptable argument sets:
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// - none -> ""
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// - true, false, true -> "ctrl+shift"
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// - true, false -> "ctrl"
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// - [true, false] -> "ctrl"
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// - 'alt+shift' -> "alt+shift"
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// - 'shift - alt' -> "alt+shift"
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//
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function normalizeModifiers(c, a, s){
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if(c != null && c.constructor.name == 'Array'){
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a = c[1]
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s = c[2]
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c = c[0]
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}
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if(typeof(c) == typeof('str')){
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var modifiers = c
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} else {
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var modifiers = (c ? 'ctrl' : '')
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+ (a ? ' alt' : '')
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+ (s ? ' shift' : '')
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}
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// build the dormalized modifier string...
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var res = /ctrl/i.test(modifiers) ? 'ctrl' : ''
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res += /alt/i.test(modifiers) ? (res != '' ? '+alt' : 'alt') : ''
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res += /shift/i.test(modifiers) ? (res != '' ? '+shift' : 'shift') : ''
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return res
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}
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/* Key handler getter
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*
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* For doc on format see makeKeyboardHandler(...)
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*
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* modifiers can be:
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* - '' (default) - No modifiers
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* - '?' - Return list of applicable modifiers per mode
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* - <modifier> - Any of 'ctrl', 'alt' or 'shift' alone or in
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* combination.
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* Combinations MUST be ordered as shown above.
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* Combination elements are separated by '+'
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* Ex:
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* 'ctrl+shift'
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* NOTE: 'shift+ctrl' is wrong.
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* NOTE: normalizeModifiers(...) can be used as
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* a reference, if in doubt.
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*
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* modes can be:
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* - 'any' (default) - Get list of all applicable handlers up until
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* the first applicable ignore.
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* - 'all' - Get ALL handlers, including ignores
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* - <mode> - Get handlers for an explicit mode
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*
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*
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* This will also resolve several shifted keys by name, for example:
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* 'shift-/' is the same as '?', and either can be used, but the shorter
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* direct notation has priority (see _SHIFT_KEYS for supported keys).
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*
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*
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* Returns:
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* {
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* <mode>: <handler>,
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* ...
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* }
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*
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*
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* <handler> can be:
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* - <function> - handler
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* - [<doc>, <function>]
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* - lisp-style handler
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* - 'IGNORE' - if mode is 'all' and key is in .ignore
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* - [<function>, 'IGNORE NEXT']
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* - if mode is 'all' and the key is both in .ignore
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* and a handler is defined in the current section
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* NOTE: in this case if this mode matches, all
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* the subsequent handlers will get ignored
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* in normal modes...
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*
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*
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* NOTE: adding a key to the ignore list has the same effect as returning
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* false form it's handler in the same context.
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* NOTE: it is not possible to do a shift-? as it is already shifted.
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* NOTE: if a key is not handled in a mode, that mode will not be
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* present in the resulting object.
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* NOTE: this will not unwrap lisp-style (see below) handlers.
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* NOTE: modes are prioritized by order of occurrence.
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* NOTE: modifiers can be a list of three bools...
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* (see: normalizeModifiers(...) for further information)
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*
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* XXX check do we need did_handling here...
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* XXX BUG explicitly given modes do not yield results if the pattern
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* does not match...
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*/
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function getKeyHandlers(key, modifiers, keybindings, modes, shifted_keys){
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var chr = null
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var s_chr = null
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// XXX I do not understand why this is here...
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var did_handling = false
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var did_ignore = false
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modifiers = modifiers == null ? '' : modifiers
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modifiers = modifiers != '?' ? normalizeModifiers(modifiers) : modifiers
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modes = modes == null ? 'any' : modes
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shifted_keys = shifted_keys == null ? _SHIFT_KEYS : shifted_keys
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if(typeof(key) == typeof(123)){
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key = key
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chr = toKeyName(key)
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} else {
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chr = key
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key = toKeyCode(key)
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}
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// XXX this is not done yet...
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if(shifted_keys != false && /shift/i.test(modifiers)){
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var s_chr = shifted_keys[chr]
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}
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res = {}
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for(var title in keybindings){
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// If a key is ignored then look no further...
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if(did_ignore){
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if(modes != 'all'){
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break
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} else {
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did_ignore = false
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if(modifiers != '?' && res[mode] != 'IGNORE'){
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res[mode] = [ res[mode], 'IGNORE NEXT']
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}
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}
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}
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// older version compatibility...
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if(keybindings[title].pattern != null){
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var mode = keybindings[title].pattern
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} else {
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var mode = title
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}
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// check if we need to skip this mode...
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if( !(modes == 'all'
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// explicit mode match...
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|| modes == mode
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// 'any' means we need to check the mode...
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|| (modes == 'any'
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// '*' always matches...
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&& mode == '*'
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// match the mode...
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|| $(mode).length != 0))){
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continue
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}
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var bindings = keybindings[title]
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if(s_chr != null && s_chr in bindings){
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var handler = bindings[s_chr]
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chr = s_chr
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modifiers = modifiers.replace(/\+?shift/i, '')
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} else if(chr in bindings){
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var handler = bindings[chr]
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} else {
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var handler = bindings[key]
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}
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// alias...
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// XXX should this be before after or combined with ignore handling...
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while( handler != null
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&& (typeof(handler) == typeof(123)
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|| typeof(handler) == typeof('str')
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|| typeof(handler) == typeof({})
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&& handler.constructor.name == 'Object') ){
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// do the complex handler aliases...
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if(typeof(handler) == typeof({}) && handler.constructor.name == 'Object'){
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// build modifier list...
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if(modifiers == '?'){
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break
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}
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if(modifiers in handler){
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if(typeof(handler[modifiers]) == typeof('str')){
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handler = handler[modifiers]
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} else {
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break
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}
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} else if(typeof(handler['default']) == typeof('str')){
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handler = handler['default']
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} else {
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break
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}
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}
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// simple handlers...
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if(handler in bindings){
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// XXX need to take care of that we can always be a number or a string...
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handler = bindings[handler]
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} else if(typeof(handler) == typeof(1)) {
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handler = bindings[toKeyName(handler)]
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} else {
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handler = bindings[toKeyCode(handler)]
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}
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}
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// if something is ignored then just breakout and stop handling...
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if(bindings.ignore == '*'
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|| bindings.ignore != null
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&& (bindings.ignore.indexOf(key) != -1
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|| bindings.ignore.indexOf(chr) != -1)){
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did_handling = true
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// ignoring a key will stop processing it...
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if(modes == 'all' || mode == modes){
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// NOTE: if a handler is defined in this section, this
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// will be overwritten...
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// XXX need to add the handler to this if it's defined...
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res[mode] = 'IGNORE'
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}
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did_ignore = true
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}
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// no handler...
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if(handler == null){
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continue
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}
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// complex handler...
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if(typeof(handler) == typeof({}) && handler.constructor.name == 'Object'){
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// build modifier list...
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if(modifiers == '?'){
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res[mode] = Object.keys(handler)
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did_handling = true
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continue
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}
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var callback = handler[modifiers]
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if(callback == null){
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callback = handler['default']
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}
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if(callback != null){
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res[mode] = callback
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did_handling = true
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continue
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}
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// simple callback...
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} else {
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// build modifier list...
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if(modifiers == '?'){
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res[mode] = 'none'
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} else {
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res[mode] = handler
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}
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did_handling = true
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continue
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}
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if(modes != 'all' && did_handling){
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break
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}
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}
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return res
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}
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/* Basic key binding format:
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*
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* {
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* <title>: {
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* doc: <text>,
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* pattern: <css-selector>,
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*
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* // this defines the list of keys to ignore by the handler.
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* // NOTE: use "*" to ignore all keys other than explicitly
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* // defined in the current section.
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* // NOTE: ignoring a key will stop processing it in other
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* // compatible modes.
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* ignore: <ignored-keys>
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*
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* // NOTE: a callback can have a .doc attr containing
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* // documentation...
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* <key-def> : <callback>,
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*
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* <key-def> : [
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* // this can be any type of handler except for an alias...
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* <handler>,
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* <doc>
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* ],
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*
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* <key-def> : {
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* // modifiers can either have a callback or an alias as
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* // a value...
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* // NOTE: when the alias is resolved, the same modifiers
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* // will be applied to the final resolved handler.
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* default: <callback> | <key-def-x>,
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*
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* // a modifier can be any single modifier, like shift or a
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* // combination of modifiers like 'ctrl+shift', in order
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* // of priority.
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* // supported modifiers, ordered by priority, are:
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* // - ctrl
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* // - alt
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* // - shift
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* // NOTE: if in doubt use normalizeModifiers(..) as a
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* // reference...
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* <modifer>: [...],
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* ...
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* },
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*
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* // alias...
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* <key-def-a> : <key-def-b>,
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*
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* ...
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* },
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*
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* // legacy format, still supported... (deprecated)
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* <css-selector>: {
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* // meta-data used to generate user docs/help/config
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* title: <text>,
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* ...
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* },
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*
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* ...
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* }
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*
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*
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* <key-def> can be:
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* - explicit key code, e.g. 65
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* - key name, if present in _SPECIAL_KEYS, e.g. Enter
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* - key char (uppercase), as is returned by String.fromCharCode(...) e.g. A
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* - action -- any arbitrary string that is not in the above categories.
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*
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*
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* NOTE: adding a key to the ignore list has the same effect as returning
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* false form it's handler in the same context.
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* NOTE: actions,the last case, are used for alias referencing, they will
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* never match a real key, but will get resolved in alias searches.
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* NOTE: to test what to use as <key-def> use toKeyCode(..) / toKeyName(..).
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* NOTE: all fields are optional.
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* NOTE: if a handler explicitly returns false then that will break the
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* event propagation chain and exit the handler.
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* i.e. no other matching handlers will be called.
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* NOTE: if more than one match is found all matching handlers will be
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* called in sequence until one returns false explicitly.
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* NOTE: a <css-selector> is used as a predicate to select a section to
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* use. if multiple selectors match something then multiple sections
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* will be resolved in order of occurrence.
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* NOTE: the number keys are named with a leading hash '#' (e.g. '#8')
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* to avoid conflicsts with keys that have the code with the same
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* value (e.g. 'backspace' (8)).
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* NOTE: one can use a doc(<doc-string>, <callback>) as a shorthand to
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* assign a docstring to a handler.
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* it will only assign .doc attr and return the original function.
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*
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* XXX need an explicit way to prioritize modes...
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* XXX will aliases get resolved if they are in a different mode??
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*/
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function makeKeyboardHandler(keybindings, unhandled){
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if(unhandled == null){
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unhandled = function(){}
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}
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return function(evt){
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var did_handling = false
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var res = null
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// key data...
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var key = evt.keyCode
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// get modifiers...
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var modifiers = [evt.ctrlKey, evt.altKey, evt.shiftKey]
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//window.DEBUG && console.log('KEY:', key, chr, modifiers)
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var handlers = getKeyHandlers(key, modifiers, keybindings)
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for(var mode in handlers){
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var handler = handlers[mode]
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if(handler != null){
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// Array, lisp style with docs...
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if(typeof(handler) == typeof([]) && handler.constructor.name == 'Array'){
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// we do not care about docs here, so just get the handler...
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handler = handler[0]
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}
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did_handling = true
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res = handler(evt)
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if(res === false){
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break
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}
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}
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}
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if(!did_handling){
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return unhandled(key)
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}
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return res
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}
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}
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/* Build structure ready for conversion to HTML help.
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*
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* Structure:
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* {
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* <section-title>: {
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* doc: ...
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*
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* <handler-doc>: <keys-spec>
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* ...
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* }
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* }
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*
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* <keys-spec> - list of key names.
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*
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*
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* NOTE: this will not add keys (key names) that are not explicit key names.
|
|
*/
|
|
// XXX do we need to normalize/pre-process keybindings???
|
|
// - might be a good idea to normalize the <modifiers>...
|
|
function buildKeybindingsHelp(keybindings, shifted_keys){
|
|
shifted_keys = shifted_keys == null ? _SHIFT_KEYS : shifted_keys
|
|
var res = {}
|
|
var mode, title
|
|
|
|
for(var title in keybindings){
|
|
mode = keybindings[title]
|
|
|
|
// older version compatibility...
|
|
if(keybindings[title].pattern != null){
|
|
var pattern = keybindings[title].pattern
|
|
} else {
|
|
var pattern = title
|
|
// titles and docs...
|
|
var title = mode.title == null ? pattern : mode.title
|
|
}
|
|
|
|
res[title] = {
|
|
doc: mode.doc == null ? '' : mode.doc
|
|
}
|
|
section = res[title]
|
|
|
|
// handlers...
|
|
for(var key in mode){
|
|
if(KEYBOARD_SYSTEM_ATTRS.indexOf(key) >= 0){
|
|
continue
|
|
}
|
|
var modifiers = getKeyHandlers(key, '?', keybindings, 'all')[pattern]
|
|
modifiers = modifiers == 'none' || modifiers == undefined ? [''] : modifiers
|
|
|
|
for(var i=0; i < modifiers.length; i++){
|
|
var mod = modifiers[i]
|
|
|
|
var handler = getKeyHandlers(key, mod, keybindings, 'all')[pattern]
|
|
|
|
if(handler.constructor.name == 'Array' && handler[1] == 'IGNORE NEXT'){
|
|
handler = handler[0]
|
|
}
|
|
|
|
// standard object doc...
|
|
if('doc' in handler){
|
|
var doc = handler.doc
|
|
|
|
// lisp style...
|
|
} else if(handler.constructor.name == 'Array'){
|
|
var doc = handler[1]
|
|
|
|
// no doc...
|
|
} else {
|
|
if('name' in handler && handler.name != ''){
|
|
var doc = handler.name
|
|
} else {
|
|
// XXX is this the right way to do this?
|
|
var doc = handler
|
|
}
|
|
}
|
|
|
|
// populate the section...
|
|
// NOTE: we need a list of keys per action...
|
|
if(doc in section){
|
|
var keys = section[doc]
|
|
} else {
|
|
var keys = []
|
|
section[doc] = keys
|
|
}
|
|
|
|
// translate shifted keys...
|
|
if(shifted_keys != false && mod == 'shift' && key in shifted_keys){
|
|
mod = ''
|
|
key = shifted_keys[key]
|
|
}
|
|
|
|
// skip anything that is not a key...
|
|
if(key.length > 1 && !(key in _KEY_CODES)){
|
|
continue
|
|
}
|
|
|
|
keys.push((mod == '' || mod == 'default') ? key : (mod +'+'+ key))
|
|
}
|
|
|
|
}
|
|
}
|
|
|
|
return res
|
|
}
|
|
|
|
|
|
// Get a list of keys associated with a given doc...
|
|
//
|
|
// The second argument must be a structure formated as returned by
|
|
// buildKeybindingsHelp(...)
|
|
//
|
|
// Returned format:
|
|
// {
|
|
// <section-name> : <key-spec>
|
|
// ...
|
|
// }
|
|
//
|
|
// NOTE: <key-spec> is the same as generated by buildKeybindingsHelp(..)
|
|
function getKeysByDoc(doc, help){
|
|
var res = {}
|
|
for(var mode in help){
|
|
var name = mode
|
|
var section = help[mode]
|
|
if(doc in section){
|
|
res[mode] = section[doc]
|
|
}
|
|
}
|
|
return res
|
|
}
|
|
|
|
|
|
// Build a basic HTML table with keyboard help...
|
|
//
|
|
// The table will look like this:
|
|
//
|
|
// <table class="keyboard-help">
|
|
//
|
|
// <!-- section head -->
|
|
// <tr class="section-title">
|
|
// <th colspan=2> SECTION TITLE <th>
|
|
// </tr>
|
|
// <tr class="section-doc">
|
|
// <td colspan=2> SECTION DESCRIPTION <td>
|
|
// </tr>
|
|
//
|
|
// <!-- section keys -->
|
|
// <tr>
|
|
// <td> KEYS <td>
|
|
// <td> ACTION DESCRIPTION <td>
|
|
// </tr>
|
|
//
|
|
// ...
|
|
//
|
|
// </table>
|
|
//
|
|
// NOTE: section are not separated in any way other than the <th> element.
|
|
// NOTE: the actual HTML is created by jQuery, so the table may get
|
|
// slightly structurally changed, i.e. a <tbody> element will be
|
|
// added etc.
|
|
//
|
|
function buildKeybindingsHelpHTML(keybindings){
|
|
var doc = buildKeybindingsHelp(keybindings)
|
|
|
|
var res = '<table class="keyboard-help">'
|
|
for(var mode in doc){
|
|
if(mode == 'doc'){
|
|
continue
|
|
}
|
|
// section head...
|
|
res += ' <tr class="section-title"><th colspan=2>' + mode + '</th></tr>\n'
|
|
mode = doc[mode]
|
|
res += ' <tr class="section-doc"><td colspan=2>'+ mode.doc + '</td></tr>\n'
|
|
|
|
// keys...
|
|
for(var action in mode){
|
|
if(action == 'doc'){
|
|
continue
|
|
}
|
|
res += ' <tr><td>' + mode[action].join(', ') +'</td><td>'+ action + '</td></tr>\n'
|
|
}
|
|
}
|
|
res += '</table>'
|
|
|
|
return $(res)
|
|
}
|
|
|
|
|
|
// Build HTML for a single key definition...
|
|
//
|
|
// Format if combining sections (default):
|
|
// <span class="key-doc">
|
|
// <span class="doc"> DOC </span>
|
|
// <span class="keys"> KEYS </span>
|
|
// </span>
|
|
//
|
|
// Format if not combining sections:
|
|
// <span class="key-doc">
|
|
// <span class="doc"> DOC </span>
|
|
// <span class="section">
|
|
// <span class="name"> MODE NAME </span>
|
|
// <span class="keys"> KEYS </span>
|
|
// </span>
|
|
// ...
|
|
// </span>
|
|
//
|
|
// XXX not yet sure if we are handling the sections correctly...
|
|
function getKeysByDocHTML(doc, help, combine_sections){
|
|
combine_sections = combine_sections == null ? true : combine_sections
|
|
|
|
var spec = getKeysByDoc(doc, help)
|
|
var res = '<span class="key-doc">'
|
|
|
|
res += '<span class="doc">'+ doc +'</span>'
|
|
|
|
var keys = []
|
|
|
|
for(var section in spec){
|
|
if(!combine_sections){
|
|
keys = spec[section].join(', ')
|
|
res += '<span class="section">'
|
|
+'<span class="name">'+ section +'</span>'
|
|
+'<span class="keys">'+ keys +'</span>'
|
|
+'</span>'
|
|
} else {
|
|
keys = keys.concat(spec[section])
|
|
}
|
|
}
|
|
|
|
if(combine_sections){
|
|
res += '<span class="keys">'+ keys.join(', ') +'</span>'
|
|
}
|
|
|
|
return res + '</span>'
|
|
}
|
|
|
|
|
|
// Update key definitions...
|
|
//
|
|
// NOTE: this does not support multiple sections...
|
|
function updateHTMLKeyDoc(help, root){
|
|
root = root == null ? $('body') : root
|
|
return root.find('.key-doc').each(function(i, e){
|
|
e = $(e)
|
|
var doc = e.find('.doc')
|
|
var keys = $(getKeysByDocHTML(doc.html(), help)).find('.keys')
|
|
e.find('.keys').html(keys.html())
|
|
})
|
|
}
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
* Key binding editor...
|
|
*/
|
|
|
|
// XXX
|
|
|
|
|
|
|
|
/**********************************************************************
|
|
* vim:set ts=4 sw=4 : */
|