/*  DokuWiki MoaiEditor Highlight_header.js file
    Version : 0.5a (May 6, 2026)
    Author  : MoaiTools <info@moaitools.org>
    License : GPL 3 (http://www.gnu.org/licenses/gpl.html) */

/*   Handles the syntax highlighting of headers (h1,h2,h3,h4,h5).
*/
MoaiEditor.HighlightHeader = class {

    constructor(outer) {
    
        // Arguments
        this.outer = outer;
    }
    // ────────────────────────────────────
    highlight (content, syntax, linetext) { 
    
        const matcher = moaiEditor.matches.matcher;
        
        // Parse the line text
        const parsed = matcher.headers.isHeader(linetext);
        
        // Do not highlight if it does not have header syntax
        if (!parsed) {
            content.textContent = linetext;
            content.style.background = "none";
            return;
        }
        // Clear the contents
        content.textContent = '';
        
        // Prepare the head, body and tail of the header
        const type = parsed.type;
        const text = parsed.content;
        var pos_start = parsed.contentStart + (text.length - text.trimStart().length);
        var pos_end   = parsed.contentEnd - (text.length - text.trimEnd().length);
        const head = linetext.substring(0, pos_start);
        const tail = linetext.substring(pos_end);
        
        // Create the HTML elements (must use 'append' for text to prevent the browser from intepreting code like '<pre>')
        var inner = moaiEditor.createHTML('<span class="moaied-syntax-inner"></span>');
        inner.append(parsed.text);
        var box = moaiEditor.createHTML('<span class="moaied-syntax-box">'+type+'</span>');
        var outer = moaiEditor.createHTML('<span class="moaied-syntax-header '+type+'"></span>');
        outer.append(head);
        outer.appendChild(inner);
        outer.append(tail);
        outer.appendChild(box);
        
        // Update the node
        content.appendChild(outer);
    }
    // ────────────────────────────────────
}; // End Class