1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
|
/**
* @license
* Visual Blocks Editor
*
* Copyright 2016 Google Inc.
* https://developers.google.com/blockly/
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
/**
* @fileoverview Number input field
* @author fenichel@google.com (Rachel Fenichel)
*/
'use strict';
goog.provide('Blockly.FieldNumber');
goog.require('Blockly.FieldTextInput');
goog.require('goog.math');
/**
* Class for an editable number field.
* @param {number|string} value The initial content of the field.
* @param {number|string|undefined} opt_min Minimum value.
* @param {number|string|undefined} opt_max Maximum value.
* @param {number|string|undefined} opt_precision Precision for value.
* @param {Function=} opt_validator An optional function that is called
* to validate any constraints on what the user entered. Takes the new
* text as an argument and returns either the accepted text, a replacement
* text, or null to abort the change.
* @extends {Blockly.FieldTextInput}
* @constructor
*/
Blockly.FieldNumber =
function(value, opt_min, opt_max, opt_precision, opt_validator) {
value = String(value);
Blockly.FieldNumber.superClass_.constructor.call(this, value, opt_validator);
this.setConstraints(opt_min, opt_max, opt_precision);
};
goog.inherits(Blockly.FieldNumber, Blockly.FieldTextInput);
/**
* Set the maximum, minimum and precision constraints on this field.
* Any of these properties may be undefiend or NaN to be disabled.
* Setting precision (usually a power of 10) enforces a minimum step between
* values. That is, the user's value will rounded to the closest multiple of
* precision. The least significant digit place is inferred from the precision.
* Integers values can be enforces by choosing an integer precision.
* @param {number|string|undefined} min Minimum value.
* @param {number|string|undefined} max Maximum value.
* @param {number|string|undefined} precision Precision for value.
*/
Blockly.FieldNumber.prototype.setConstraints = function(min, max, precision) {
precision = parseFloat(precision);
this.precision_ = isNaN(precision) ? 0 : precision;
min = parseFloat(min);
this.min_ = isNaN(min) ? -Infinity : min;
max = parseFloat(max);
this.max_ = isNaN(max) ? Infinity : max;
this.setValue(this.callValidator(this.getValue()));
};
/**
* Ensure that only a number in the correct range may be entered.
* @param {string} text The user's text.
* @return {?string} A string representing a valid number, or null if invalid.
*/
Blockly.FieldNumber.prototype.classValidator = function(text) {
if (text === null) {
return null;
}
text = String(text);
// TODO: Handle cases like 'ten', '1.203,14', etc.
// 'O' is sometimes mistaken for '0' by inexperienced users.
text = text.replace(/O/ig, '0');
// Strip out thousands separators.
text = text.replace(/,/g, '');
var n = parseFloat(text || 0);
if (isNaN(n)) {
// Invalid number.
return null;
}
// Round to nearest multiple of precision.
if (this.precision_ && isFinite(n)) {
n = Math.round(n / this.precision_) * this.precision_;
}
// Get the value in range.
n = goog.math.clamp(n, this.min_, this.max_);
return String(n);
};
|
