JimV-C/static/novnc/core/util/properties.js

/*
 * noVNC: HTML5 VNC client
 * Copyright (C) 2012 Joel Martin
 * Licensed under MPL 2.0 (see LICENSE.txt)
 *
 * See README.md for usage and integration instructions.
 */

/*
 * Getter/Setter Creation Utilities
 */

import * as Log from './logging.js';

function make_property (proto, name, mode, type) {
    "use strict";

    var getter;
    if (type === 'arr') {
        getter = function (idx) {
            if (typeof idx !== 'undefined') {
                return this['_' + name][idx];
            } else {
                return this['_' + name];
            }
        };
    } else {
        getter = function () {
            return this['_' + name];
        };
    }

    var make_setter = function (process_val) {
        if (process_val) {
            return function (val, idx) {
                if (typeof idx !== 'undefined') {
                    this['_' + name][idx] = process_val(val);
                } else {
                    this['_' + name] = process_val(val);
                }
            };
        } else {
            return function (val, idx) {
                if (typeof idx !== 'undefined') {
                    this['_' + name][idx] = val;
                } else {
                    this['_' + name] = val;
                }
            };
        }
    };

    var setter;
    if (type === 'bool') {
        setter = make_setter(function (val) {
            if (!val || (val in {'0': 1, 'no': 1, 'false': 1})) {
                return false;
            } else {
                return true;
            }
        });
    } else if (type === 'int') {
        setter = make_setter(function (val) { return parseInt(val, 10); });
    } else if (type === 'float') {
        setter = make_setter(parseFloat);
    } else if (type === 'str') {
        setter = make_setter(String);
    } else if (type === 'func') {
        setter = make_setter(function (val) {
            if (!val) {
                return function () {};
            } else {
                return val;
            }
        });
    } else if (type === 'arr' || type === 'dom' || type == 'raw') {
        setter = make_setter();
    } else {
        throw new Error('Unknown property type ' + type);  // some sanity checking
    }

    // set the getter
    if (typeof proto['get_' + name] === 'undefined') {
        proto['get_' + name] = getter;
    }

    // set the setter if needed
    if (typeof proto['set_' + name] === 'undefined') {
        if (mode === 'rw') {
            proto['set_' + name] = setter;
        } else if (mode === 'wo') {
            proto['set_' + name] = function (val, idx) {
                if (typeof this['_' + name] !== 'undefined') {
                    throw new Error(name + " can only be set once");
                }
                setter.call(this, val, idx);
            };
        }
    }

    // make a special setter that we can use in set defaults
    proto['_raw_set_' + name] = function (val, idx) {
        setter.call(this, val, idx);
        //delete this['_init_set_' + name];  // remove it after use
    };
};

export function make_properties (constructor, arr) {
    "use strict";
    for (var i = 0; i < arr.length; i++) {
        make_property(constructor.prototype, arr[i][0], arr[i][1], arr[i][2]);
    }
};

export function set_defaults (obj, conf, defaults) {
    var defaults_keys = Object.keys(defaults);
    var conf_keys = Object.keys(conf);
    var keys_obj = {};
    var i;
    for (i = 0; i < defaults_keys.length; i++) { keys_obj[defaults_keys[i]] = 1; }
    for (i = 0; i < conf_keys.length; i++) { keys_obj[conf_keys[i]] = 1; }
    var keys = Object.keys(keys_obj);

    for (i = 0; i < keys.length; i++) {
        var setter = obj['_raw_set_' + keys[i]];
        if (!setter) {
          Log.Warn('Invalid property ' + keys[i]);
          continue;
        }

        if (keys[i] in conf) {
            setter.call(obj, conf[keys[i]]);
        } else {
            setter.call(obj, defaults[keys[i]]);
        }
    }
};