//DESCRIPTION:Add Text before or after an XML Element
//Contact: Gregor Fellenz - http://www.publishingx.de

var px = {
	projectName:"AddTextToXMLElement.jsx",
	version:"2017-05-22-v1.0",
		
	defaultTagName:"Root",
	defaultTextBefore:"Prefix",
	defaultTextAfter:"Suffix",
	
	
	runWithUndo:true,
	
	// Verwaltung
	debug:false
}

if (app.extractLabel("px:debugID") == "Jp07qcLlW3aDHuCoNpBK_Gregor") {
	px.debug = true;
}

main();

function main() {
	if  (app.documents.length == 0) {
		alert("Kein Dokument geöffnet", "Hinweis"); 
		return;
	}	
	if (app.layoutWindows.length == 0)  {
		alert("Kein Dokument sichtbar", "Hinweis"); 
		return;
	}
		
	var dok = app.documents[0];

	var ial = app.scriptPreferences.userInteractionLevel;
	var redraw = app.scriptPreferences.enableRedraw;
	if (px.debug) {
		if (checkDok(dok)) {
			if (px.runWithUndo) {
				app.doScript(processDok, ScriptLanguage.JAVASCRIPT, [dok], UndoModes.ENTIRE_SCRIPT, px.projectName);
			}
			else {
				processDok(dok);
			}
		}	
	}
	else {
		try {
			if(dok && dok.isValid) {				
				app.scriptPreferences.userInteractionLevel = UserInteractionLevels.NEVER_INTERACT;
				app.scriptPreferences.enableRedraw = false;
				
				if (checkDok(dok)) {
					if (px.runWithUndo) {
						app.doScript(processDok, ScriptLanguage.JAVASCRIPT, [dok], UndoModes.ENTIRE_SCRIPT, px.projectName);
					}
					else {
						processDok(dok);
					}
				}
			}
		}
		catch (e) {
			alert(e);
		}
		finally {
			app.scriptPreferences.userInteractionLevel = ial;
			app.scriptPreferences.enableRedraw = redraw;	
			app.findGrepPreferences = NothingEnum.NOTHING;
			app.changeGrepPreferences = NothingEnum.NOTHING;
		}
	}

}




/* Functions with main functionality */
function checkDok(dok) {
	return true;
}

function processDok(dok) {
	if (px.runWithUndo) {
		dok = dok[0]; 
	}
	
	var win = new Window("dialog", "Add Text before or after an XML Element" );
	with (win) {
		win.pConfig = add( "panel", undefined, "Enter text and pick an element");
		win.pConfig.preferredSize.width =  400;
		win.pConfig.alignChildren = ['left', 'top'];
		win.pConfig.spacing = 10;
		with (win.pConfig) {
			win.pConfig.gConfig = add( "group");
			win.pConfig.gConfig.margins = [0,10,0,0];
			win.pConfig.gConfig.spacing = 10;
			with (win.pConfig.gConfig) {
				win.pConfig.gConfig.beforeText = add( "edittext", undefined, px.defaultTextBefore);
				win.pConfig.gConfig.beforeText.preferredSize.width = 100;

				win.pConfig.gConfig.tagNameDropdown = add("dropdownlist", undefined, dok.xmlTags.everyItem().name);
				win.pConfig.gConfig.tagNameDropdown.selection = px.defaultTagName;
				win.pConfig.gConfig.tagNameDropdown.preferredSize.width = 150;
				
				win.pConfig.gConfig.afterText = add( "edittext", undefined, px.defaultTextAfter);
				win.pConfig.gConfig.afterText.preferredSize.width = 100;
			}
		}
		
		// Steuerung Ok/Cancel
		win.groupStart = add("group");
		win.groupStart.preferredSize.width = 400;
		win.groupStart.alignChildren = ['right', 'center'];
		win.groupStart.margins = 0;
		with (win.groupStart) {
			win.groupStart.butOk = add( "button", undefined, "Start");
			win.groupStart.butOk.onClick = function() {				
				win.close(1); 
			}		
			win.groupStart.butCancel = add( "button", undefined, "Cancel");
			win.groupStart.butCancel.onClick = function(){
				win.close(2); 
			}		
		}

	}
	win.center();
	var res = win.show();
	if (res == 2) return;

	var root = dok.xmlElements[0];
	addStandardNameSpace(root);
	var nodes = root.evaluateXPathExpression("//" + win.pConfig.gConfig.tagNameDropdown.selection.text);

	var beforeText = win.pConfig.gConfig.beforeText.text.replace(/\\r/, "\r").replace(/\\n/, "\n").replace(/\\t/, "\t");
	var afterText = win.pConfig.gConfig.afterText.text.replace(/\\r/, "\r").replace(/\\n/, "\n").replace(/\\t/, "\t");

	for (var n = 0; n < nodes.length; n++) {
		var node = nodes[n];
		node.insertTextAsContent (beforeText, XMLElementPosition.ELEMENT_START);
		node.insertTextAsContent (afterText, XMLElementPosition.ELEMENT_END);
	}
	
}

//  Add standard namespaces for using evaluateXPathExpression() on #InDesign #XML subtrees 
function addStandardNameSpace(xmlContainer) {
	if( !xmlContainer.xmlAttributes.itemByName("xmlns:xml").isValid ) {
		xmlContainer.xmlAttributes.add( "xmlns:xml", "http://www.w3.org/XML/1998/namespace" );
	}
	if( !xmlContainer.xmlAttributes.itemByName("xmlns:aid").isValid ) {
		xmlContainer.xmlAttributes.add( "xmlns:aid", "http://ns.adobe.com/AdobeInDesign/4.0/");
	}
	if( !xmlContainer.xmlAttributes.itemByName("xmlns:aid5").isValid ) {
		xmlContainer.xmlAttributes.add( "xmlns:aid5", "http://ns.adobe.com/AdobeInDesign/5.0/");
	}
	return xmlContainer;
}