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import {Component, LifecycleEvent, View, ViewEncapsulation, Attribute} from 'angular2/angular2';
import {CONST} from 'angular2/src/facade/lang';
import {isPresent, isBlank} from 'angular2/src/facade/lang';
import {Math} from 'angular2/src/facade/math';
/** Different display / behavior modes for progress-linear. */
@CONST()
class ProgressMode {
@CONST() static DETERMINATE = 'determinate';
@CONST() static INDETERMINATE = 'indeterminate';
@CONST() static BUFFER = 'buffer';
@CONST() static QUERY = 'query';
}
@Component({
selector: 'md-progress-linear',
lifecycle: [LifecycleEvent.onChange],
properties: ['value', 'bufferValue'],
host: {
'role': 'progressbar',
'aria-valuemin': '0',
'aria-valuemax': '100',
'[attr.aria-valuenow]': 'value'
}
})
@View({
templateUrl: 'package:angular2_material/src/components/progress-linear/progress_linear.html',
directives: [],
encapsulation: ViewEncapsulation.NONE
})
export class MdProgressLinear {
/** Value for the primary bar. */
value_: number;
/** Value for the secondary bar. */
bufferValue: number;
/** The render mode for the progress bar. */
mode: string;
/** CSS `transform` property applied to the primary bar. */
primaryBarTransform: string;
/** CSS `transform` property applied to the secondary bar. */
secondaryBarTransform: string;
constructor(@Attribute('mode') mode: string) {
this.primaryBarTransform = '';
this.secondaryBarTransform = '';
this.mode = isPresent(mode) ? mode : ProgressMode.DETERMINATE;
}
get value() {
return this.value_;
}
set value(v) {
if (isPresent(v)) {
this.value_ = MdProgressLinear.clamp(v);
}
}
onChange(_) {
// If the mode does not use a value, or if there is no value, do nothing.
if (this.mode == ProgressMode.QUERY || this.mode == ProgressMode.INDETERMINATE ||
isBlank(this.value)) {
return;
}
this.primaryBarTransform = this.transformForValue(this.value);
// The bufferValue is only used in buffer mode.
if (this.mode == ProgressMode.BUFFER) {
this.secondaryBarTransform = this.transformForValue(this.bufferValue);
}
}
/** Gets the CSS `transform` property for a progress bar based on the given value (0 - 100). */
transformForValue(value) {
// TODO(jelbourn): test perf gain of caching these, since there are only 101 values.
let scale = value / 100;
let translateX = (value - 100) / 2;
return `translateX(${translateX}%) scale(${scale}, 1)`;
}
/** Clamps a value to be between 0 and 100. */
static clamp(v) {
return Math.max(0, Math.min(100, v));
}
}