/*  DokuWiki MoaiEditor Scroll_to.js file
    Version : 0.5b (2026-05-08)
    Author  : MoaiTools <info@moaitools.org>
    License : GPL 3 (http://www.gnu.org/licenses/gpl.html) */
 
/* 
*/
MoaiEditor.WatchSelection = class {

    constructor(outer) {    
        
        // Arguments
        this.outer = outer;
        
        // Variables
        this.selection = {start:null, end:null};
        
        // Objects
        this.timer = new MoaiEditor.Timer();
        
        // Intervals
        this.interval = setInterval(this.onInterval.bind(this), 200);
    }
    // ──────────────────────────────────── 
    onInterval() {
    
        // Return if the parent is disabled
        if (!this.outer.enabled)
            return;

        // Return if not enough time has elapsed
        if (!this.timer.due())
            return;

        // Return if the editor is not enabled and ready
        if (!moaiEditor.layoutReady)
            return;
            
        // Check for cursor/selection change
        this.checkSelectionChange();
        
        // Optional debug actions 
        this.debug();
    }
    // ──────────────────────────────────── 
    onInput() {
        this.timer.resetPeriod();
        this.timer.restart();
        this.checkSelectionChange();
    }
    // ──────────────────────────────────── 
    checkSelectionChange() {
        const start = this.outer.textarea.selectionStart;
        const end = this.outer.textarea.selectionEnd;
        if (start != this.selection.start  ||  end != this.selection.end) {
            this.selection = {start:start, end:end};     
            this.timer.resetPeriod();       // Start checking more frequently for changes
            
            const coords = this.getCoords(start);
            //console.warn(this.selection); 
            //console.warn(this.getCoords(start));
            
            const string = this.outer.watcher.string;
            //console.warn(string[start]+" ");
        }
    }
    // ──────────────────────────────────── 
    getCoords(pos) {
        var i = 0;
        var row = 0;
        for (let line of this.outer.watcher.lines) {
            const end = i + line.length + 1;
            if (pos < end)
                return {row:row, col:pos-i};
            i = end;
            row += 1;
        }
    }
    // ──────────────────────────────────── 
    debug() {
        // Placeholder
    }
}; // End Class