devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
205 lines (204 loc) • 7.64 kB
JavaScript
/**
* DevExtreme (esm/ui/text_area.js)
* Version: 21.1.4
* Build date: Mon Jun 21 2021
*
* Copyright (c) 2012 - 2021 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import $ from "../core/renderer";
import eventsEngine from "../events/core/events_engine";
import {
noop,
ensureDefined
} from "../core/utils/common";
import {
getWindow
} from "../core/utils/window";
import registerComponent from "../core/component_registrator";
import {
extend
} from "../core/utils/extend";
import {
isDefined
} from "../core/utils/type";
import {
addNamespace,
eventData
} from "../events/utils/index";
import pointerEvents from "../events/pointer";
import scrollEvents from "../ui/scroll_view/ui.events.emitter.gesture.scroll";
import {
getVerticalOffsets,
getElementBoxParams,
parseHeight
} from "../core/utils/size";
import {
allowScroll,
prepareScrollData
} from "./text_box/utils.scroll";
import TextBox from "./text_box";
var TEXTAREA_CLASS = "dx-textarea";
var TEXTEDITOR_INPUT_CLASS = "dx-texteditor-input";
var TEXTEDITOR_INPUT_CLASS_AUTO_RESIZE = "dx-texteditor-input-auto-resize";
var TextArea = TextBox.inherit({
_getDefaultOptions: function() {
return extend(this.callBase(), {
spellcheck: true,
minHeight: void 0,
maxHeight: void 0,
autoResizeEnabled: false
})
},
_initMarkup: function() {
this.$element().addClass(TEXTAREA_CLASS);
this.callBase();
this.setAria("multiline", "true")
},
_renderContentImpl: function() {
this._updateInputHeight();
this.callBase()
},
_renderInput: function() {
this.callBase();
this._renderScrollHandler()
},
_createInput: function() {
var $input = $("<textarea>");
this._applyInputAttributes($input, this.option("inputAttr"));
this._updateInputAutoResizeAppearance($input);
return $input
},
_applyInputAttributes: function($input, customAttributes) {
$input.attr(customAttributes).addClass(TEXTEDITOR_INPUT_CLASS)
},
_renderScrollHandler: function() {
this._eventY = 0;
var $input = this._input();
var initScrollData = prepareScrollData($input, true);
eventsEngine.on($input, addNamespace(scrollEvents.init, this.NAME), initScrollData, noop);
eventsEngine.on($input, addNamespace(pointerEvents.down, this.NAME), this._pointerDownHandler.bind(this));
eventsEngine.on($input, addNamespace(pointerEvents.move, this.NAME), this._pointerMoveHandler.bind(this))
},
_pointerDownHandler: function(e) {
this._eventY = eventData(e).y
},
_pointerMoveHandler: function(e) {
var currentEventY = eventData(e).y;
var delta = this._eventY - currentEventY;
if (allowScroll(this._input(), delta)) {
e.isScrollingEvent = true;
e.stopPropagation()
}
this._eventY = currentEventY
},
_renderDimensions: function() {
var $element = this.$element();
var element = $element.get(0);
var width = this._getOptionValue("width", element);
var height = this._getOptionValue("height", element);
var minHeight = this.option("minHeight");
var maxHeight = this.option("maxHeight");
$element.css({
minHeight: void 0 !== minHeight ? minHeight : "",
maxHeight: void 0 !== maxHeight ? maxHeight : "",
width: width,
height: height
})
},
_resetDimensions: function() {
this.$element().css({
height: "",
minHeight: "",
maxHeight: ""
})
},
_renderEvents: function() {
if (this.option("autoResizeEnabled")) {
eventsEngine.on(this._input(), addNamespace("input paste", this.NAME), this._updateInputHeight.bind(this))
}
this.callBase()
},
_refreshEvents: function() {
eventsEngine.off(this._input(), addNamespace("input paste", this.NAME));
this.callBase()
},
_getHeightDifference($input) {
return getVerticalOffsets(this._$element.get(0), false) + getVerticalOffsets(this._$textEditorContainer.get(0), false) + getVerticalOffsets(this._$textEditorInputContainer.get(0), false) + getElementBoxParams("height", getWindow().getComputedStyle($input.get(0))).margin
},
_updateInputHeight: function() {
var $input = this._input();
var autoHeightResizing = void 0 === this.option("height") && this.option("autoResizeEnabled");
if (!autoHeightResizing) {
$input.css("height", "");
return
} else {
this._resetDimensions();
this._$element.css("height", this._$element.outerHeight())
}
$input.css("height", 0);
var heightDifference = this._getHeightDifference($input);
this._renderDimensions();
var minHeight = this._getBoundaryHeight("minHeight");
var maxHeight = this._getBoundaryHeight("maxHeight");
var inputHeight = $input[0].scrollHeight;
if (void 0 !== minHeight) {
inputHeight = Math.max(inputHeight, minHeight - heightDifference)
}
if (void 0 !== maxHeight) {
var adjustedMaxHeight = maxHeight - heightDifference;
var needScroll = inputHeight > adjustedMaxHeight;
inputHeight = Math.min(inputHeight, adjustedMaxHeight);
this._updateInputAutoResizeAppearance($input, !needScroll)
}
$input.css("height", inputHeight);
if (autoHeightResizing) {
this._$element.css("height", "auto")
}
},
_getBoundaryHeight: function(optionName) {
var boundaryValue = this.option(optionName);
if (isDefined(boundaryValue)) {
return "number" === typeof boundaryValue ? boundaryValue : parseHeight(boundaryValue, this._$textEditorContainer.get(0))
}
},
_renderInputType: noop,
_visibilityChanged: function(visible) {
if (visible) {
this._updateInputHeight()
}
},
_updateInputAutoResizeAppearance: function($input, isAutoResizeEnabled) {
if ($input) {
var autoResizeEnabled = ensureDefined(isAutoResizeEnabled, this.option("autoResizeEnabled"));
$input.toggleClass(TEXTEDITOR_INPUT_CLASS_AUTO_RESIZE, autoResizeEnabled)
}
},
_optionChanged: function(args) {
switch (args.name) {
case "autoResizeEnabled":
this._updateInputAutoResizeAppearance(this._input(), args.value);
this._refreshEvents();
this._updateInputHeight();
break;
case "value":
case "height":
this.callBase(args);
this._updateInputHeight();
break;
case "minHeight":
case "maxHeight":
this._renderDimensions();
this._updateInputHeight();
break;
case "visible":
this.callBase(args);
args.value && this._updateInputHeight();
break;
default:
this.callBase(args)
}
}
});
registerComponent("dxTextArea", TextArea);
export default TextArea;