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import {DisplayElement} from 'tui-lib/ui/primitives'
import * as ansi from 'tui-lib/util/ansi'
export default class Label extends DisplayElement {
// A simple text display. Automatically adjusts size to fit text.
//
// Supports formatted text in two ways:
// 1) Modify the textAttributes to be an array containing the ANSI numerical
// codes for any wanted attributes, and/or
// 2) Supply full ANSI escape codes within the text itself. (The reset
// attributes code, ESC[0m, will be processed to reset to the provided
// values in textAttributes.
//
// Subclasses overriding the writeTextTo function should be sure to call
// processFormatting before actually writing text.
constructor(text = '') {
super()
this.text = text
this.textAttributes = []
}
fixLayout() {
this.w = ansi.measureColumns(this.text)
}
drawTo(writable) {
if (this.textAttributes.length) {
writable.write(ansi.setAttributes(this.textAttributes))
}
this.writeTextTo(writable)
if (this.textAttributes.length) {
writable.write(ansi.resetAttributes())
}
super.drawTo(writable)
}
writeTextTo(writable) {
writable.write(ansi.moveCursor(this.absTop, this.absLeft))
writable.write(this.processFormatting(this.text))
}
processFormatting(text) {
return text.replace(new RegExp(ansi.ESC + '\\[0m', 'g'),
ansi.setAttributes([ansi.A_RESET, ...this.textAttributes]))
}
set text(newText) {
const ret = this.setDep('text', newText)
this.fixLayout()
return ret
}
get text() {
return this.getDep('text')
}
// Kinda bad, but works as long as you're overwriting the array instead of
// mutating it.
set textAttributes(val) { return this.setDep('textAttributes', val) }
get textAttributes() { return this.getDep('textAttributes') }
}
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