phaser4-rex-plugins/plugins/gameobjects/dynamictext/canvasinput/textedit/SelectRange.js

Plugins of phaser4

var SelectRange = function (hiddenTextEdit) {
    var textObject = hiddenTextEdit.parent;
    // var text = textObject.text;
    var selectionStart = (hiddenTextEdit.isOpened) ? hiddenTextEdit.selectionStart : null;
    var selectionEnd = (hiddenTextEdit.isOpened) ? hiddenTextEdit.selectionEnd : null;
    var prevSelectionStart = hiddenTextEdit.prevSelectionStart;
    var prevSelectionEnd = hiddenTextEdit.prevSelectionEnd;

    if ((prevSelectionStart === selectionStart) && (prevSelectionEnd === selectionEnd)) {
        return;
    }

    var min, max;
    if (prevSelectionStart === null) {
        min = selectionStart;
        max = selectionEnd;
    } else if (selectionStart === null) {
        min = prevSelectionStart;
        max = prevSelectionEnd;
    } else {
        min = Math.min(prevSelectionStart, selectionStart);
        max = Math.max(prevSelectionEnd, selectionEnd);
    }

    for (var i = min; i < max; i++) {
        var inPrevSelectionRange;
        if (prevSelectionStart === null) {
            inPrevSelectionRange = false;
        } else {
            inPrevSelectionRange = (i >= prevSelectionStart) && (i < prevSelectionEnd);
        }

        var inSelectionRange;
        if (selectionStart === null) {
            inSelectionRange = false;
        } else {
            inSelectionRange = (i >= selectionStart) && (i < selectionEnd);
        }

        if (inPrevSelectionRange === inSelectionRange) {
            continue;
        }

        var child = textObject.getCharChild(i);
        if (child) {
            var eventName = (inPrevSelectionRange) ? 'rangeout' : 'rangein';
            textObject.emit(eventName, child, i, textObject);
        }
    }

    hiddenTextEdit.prevSelectionStart = selectionStart;
    hiddenTextEdit.prevSelectionEnd = selectionEnd;
}

export default SelectRange;