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import FCore, {_} from "../core/FCore";
import {setCaretPosition} from "absol/src/HTML5/Text";

/***
 * @augments HTMLInputElement
 * @augments AElement
 * @augments PreInput
 * @constructor
 */
function IdentTextInput() {
    this.on('keydown', this.eventHandler.identTextKeyDown)
        .on('paste', this.applyData ? this.eventHandler.identTextPaste : this.eventHandler.identTextPaste1);
}


IdentTextInput.tag = 'IdentTextInput'.toLowerCase();

IdentTextInput.render = function () {
    return _('input[type="text"]');
};

IdentTextInput.eventHandler = {};

IdentTextInput.prototype.getSelectionStart = function () {
    var start = 0;
    if (this.getSelectPosition) {
        start = this.getSelectPosition().start;
    }
    else {
        if (this.selectionStart || this.selectionStart === 0)
            start = this.selectionStart;
    }
    return start;
};

IdentTextInput.prototype.getSelectionEnd = function () {
    var start = 0;
    if (this.getSelectPosition) {
        start = this.getSelectPosition().end;
    }
    else {
        if (this.selectionEnd || this.selectionEnd === 0)
            start = this.selectionEnd;
    }
    return start;
};

IdentTextInput.prototype._filterHistory = function () {
    if (!this.history) return;
    var temp = this.history.filter(function (t) {
        return !t.text.match(/(^[^a-zA-Z_$])|([^a-zA-Z$_0-9]+)/);
    });
    this.history.splice(0, this.history.length);
    this.history.push.apply(this.history, temp);
};

IdentTextInput.prototype._setNewText = function (text, caretPos) {
    this._filterHistory();
    if (typeof caretPos !== "number") caretPos = text.length;
    caretPos = Math.max(0, Math.min(text.length, caretPos >> 0));
    if (this.applyData) {
        this.applyData(text, { start: caretPos, end: caretPos, direction: 'forward' });
    }
    else {
        this.value = text;
        setCaretPosition(this, caretPos);
    }
};


IdentTextInput.eventHandler.identTextKeyDown = function (event) {
    var selectedPositionStart;
    var key = event.key;
    if (key === ' ') {
        event.preventDefault();
    }
    else if (key === 'Enter') {
        event.preventDefault();
        this.blur();
    }
    else if (key === "Escape") {
        this.value = this._prevValue || '';
        this.blur();
    }
    else if (!event.ctrlKey && !event.altKey && key.length === 1) {
        // if (key.match(/[a-zA-Z$_0-9]/)) {
        //     selectedPositionStart = this.getSelectionStart();
        //     if (selectedPositionStart === 0 && key.match(/[0-9]/)) {
        //         event.preventDefault();
        //     }
        // }
        // else {
        //     event.preventDefault();
        // }
    }
    if (!this.applyData) {
        var prevValue = this.value;
        setTimeout(function () {
            if (this.value !== prevValue) {
                this.emit('change', {}, this);
            }
        }.bind(this), 10);
    }
};


IdentTextInput.eventHandler.identTextPaste = function (event) {
    var prevValue = this.value;
    var startPos = this.getSelectionStart();
    var endPos = this.getSelectionEnd();
    setTimeout(function () {
        var newValue = this.value;
        var newEndPos = endPos + newValue.length - prevValue.length;
        var pastedText = newValue.substr(startPos, newEndPos - startPos).replace(/(^[^a-zA-Z_$])|([^a-zA-Z$_0-9]+)/g, '');
        var newValue1 = newValue.substr(0, startPos) + pastedText + newValue.substr(newEndPos);
        if (!newValue1 !== newValue) {
            this._setNewText(newValue1, startPos + pastedText.length);
        }
    }.bind(this), 0);
};

IdentTextInput.eventHandler.identTextPaste1 = function (event) {
    var clipboardData = event.clipboardData || window.clipboardData;
    var pastedText = clipboardData.getData('text/plain');
    var pastedText1 = pastedText.replace(/(^[^a-zA-Z_$])|([^a-zA-Z$_0-9]+)/g, '');
    if (pastedText !== pastedText1) {
        document.execCommand("insertText", false, pastedText1);
        event.preventDefault();
    }
};

FCore.install(IdentTextInput);

export default IdentTextInput;


// Core