Master_2_Style.jsx

/*
	
	Master_2_Style.jsx
	Bruno Herfst 2010

	An InDesign CS5 script to apply the selected master-page 
	to any page that contains the searchresult.
	
	Tested in CS6
	
*/

#target indesign;


var the_document = app.documents.item(0);

// Create a list of paragraph styles
var list_of_paragraph_styles = the_document.paragraphStyles.everyItem().name;
list_of_paragraph_styles.unshift("--ANY STYLE--");

// Create a list of master pages
var list_of_master_pages = the_document.masterSpreads.everyItem().name;

// Make the dialog box for selecting the paragraph styles
var the_dialog = app.dialogs.add({name:"add master to pages containing style"});
with(the_dialog.dialogColumns.add()){
	with(dialogRows.add()){
		staticTexts.add({staticLabel:"Find:"});
		var find_paragraph = dropdowns.add({stringList:list_of_paragraph_styles, selectedIndex:0});
	}
	with(borderPanels.add()){
		// A decorative checkbox :)
		var myGREPCheckbox = checkboxControls.add({staticLabel:"Custom GREP:", checkedState:true});
		var myGREPField = textEditboxes.add({editContents:"^.+"});

	}
	with(dialogRows.add()){
		staticTexts.add({staticLabel:"Apply "});
		var change_master = dropdowns.add({stringList:list_of_master_pages, selectedIndex:0});
		staticTexts.add({staticLabel:" to "});
		var master_offset = dropdowns.add({stringList:["Page Before", "Page", "Page After"], selectedIndex:1});
	}
	with(borderPanels.add()){
		var myRMCheckbox = checkboxControls.add({staticLabel:"Replace masters first", checkedState:true});
		var replace_master = dropdowns.add({stringList:list_of_master_pages, selectedIndex:0});
	}
}

var myResult = the_dialog.show();

if(myResult == true){
	// Define variables
	if (find_paragraph.selectedIndex == 0) {
		var find_paragraph = false;
	} else {
		var find_paragraph = the_document.paragraphStyles.item(find_paragraph.selectedIndex-1);
	}
	
	var pageOfset = 0;
	if(master_offset.selectedIndex != 1){
		if(master_offset.selectedIndex > 1){
			// Page After
			pageOfset = 1;
		} else {
			// Page Before;
			pageOfset = -1;
		}
	}
	
	var change_master = the_document.masterSpreads.item(change_master.selectedIndex);
	var replace_master = the_document.masterSpreads.item(replace_master.selectedIndex);
	var myRM = myRMCheckbox.checkedState;
	var myGREP = myGREPCheckbox.checkedState;
	
	if(myGREP == true && myGREPField.editContents != "" && myGREPField.editContents != "^") { //Find paragraph ^ is buggy in CS5 it will only find the first one not the next
		var find_what = myGREPField.editContents;
	} else {
		var find_what = "^.+";
	}
	
	if (myRM == true) {
		// Find and replace the pages
		for(var myCounter = 0; myCounter < the_document.pages.length; myCounter++){
			myPage = the_document.pages.item(myCounter);
			if (myPage.appliedMaster == change_master){
				myPage.appliedMaster = replace_master;
			}
		}
	}
	
	// Set find grep preferences to find all paragraphs with the selected paragraph style
	app.findChangeGrepOptions.includeFootnotes = false;
	app.findChangeGrepOptions.includeHiddenLayers = false;
	app.findChangeGrepOptions.includeLockedLayersForFind = false;
	app.findChangeGrepOptions.includeLockedStoriesForFind = false;
	app.findChangeGrepOptions.includeMasterPages = false;
	
	app.findGrepPreferences = NothingEnum.nothing;
	if(find_paragraph == false){
		app.findGrepPreferences.appliedParagraphStyle = NothingEnum.nothing;
	} else {
		app.findGrepPreferences.appliedParagraphStyle = find_paragraph;
	}
	app.findGrepPreferences.findWhat = find_what;
	//Search the current story
	var found_paragraphs = the_document.findGrep();
	var myCounter = 0;
	var myMessage = 0;
	var myCounterCounter = 0;
	try {
		if(found_paragraphs.length > 0){
			do {
				// Create an object reference to the found paragraph and the next
				// for use in CS4 change parentPage to parent
				var myDocOfset = found_paragraphs[myCounter].insertionPoints[0].parentTextFrames[0].parentPage.documentOffset;
				var myPage = the_document.pages[myDocOfset + pageOfset];
				// make sure page exist
				if(myPage.isValid){
					myPage.appliedMaster = change_master;
				} else {
					myCounterCounter += 1;
				}
				myCounter++;
			} while (myCounter < found_paragraphs.length);
		} else {
			myMessage = "Couldn’t find anything!";
		}
	} catch(err) {
		myMessage = err;
	}	
	if(myMessage == 0){
		var myMessage = "Done placing "+(myCounter-myCounterCounter)+" master pages!";
	}
	
	alert(myMessage);

} else {
	exit();
}