[scpubgit/stemmaweb.git] / root / js / componentload.js

// Global state variables
var selectedTextID;
var selectedTextInfo;
var selectedStemmaID = -1;
var stemmata = [];

// Load the names of the appropriate traditions into the directory div.
function refreshDirectory () {
	var lmesg = $('#loading_message').clone();
	$('#directory').empty().append( lmesg.contents() );
    $('#directory').load( _get_url(["directory"]), 
    	function(response, status, xhr) {
			if (status == "error") {
				var msg = "An error occurred: ";
				$("#directory").html(msg + xhr.status + " " + xhr.statusText);
			} else {
				if( textOnLoad != "" ) {
					// Call the click callback for the relevant text, if it is
					// in the page.
					$('#'+textOnLoad).click();
					textOnLoad = "";
				}
			}
		}
	);
}

// Load a tradition with its information and stemmata into the tradition
// view pane. Calls load_textinfo.
function loadTradition( textid, textname, editable ) {
	selectedTextID = textid;
    // First insert the placeholder image and register an error handler
    $('#textinfo_load_status').empty();
    $('#stemma_graph').empty();
    $('#textinfo_waitbox').show();
    $('#textinfo_container').hide().ajaxError( 
    	function(event, jqXHR, ajaxSettings, thrownError) {
    	if( ajaxSettings.url.indexOf( 'textinfo' ) > -1 && ajaxSettings.type == 'GET'  ) {
			$('#textinfo_waitbox').hide();
			$('#textinfo_container').show();
			display_error( jqXHR, $("#textinfo_load_status") );
    	}
    });
    
    // Hide the functionality that is irrelevant
    if( editable ) {
    	$('#open_stemma_add').show();
    	$('#open_stemma_edit').show();
    	$('#open_textinfo_edit').show();
    } else {
    	$('#open_stemma_add').hide();
    	$('#open_stemma_edit').hide();
    	$('#open_textinfo_edit').hide();
    }

    // Then get and load the actual content.
    // TODO: scale #stemma_graph both horizontally and vertically
    // TODO: load svgs from SVG.Jquery (to make scaling react in Safari)
    $.getJSON( _get_url([ "textinfo", textid ]), function (textdata) {
    	// Add the scalar data
    	selectedTextInfo = textdata;
    	load_textinfo();
     	// Add the stemma(ta) and set up the stexaminer button
    	stemmata = textdata.stemmata;
    	if( stemmata.length ) {
    		selectedStemmaID = 0;
			$('#run_stexaminer').show();
    	} else {
    		selectedStemmaID = -1;
			$('#open_stemma_edit').hide();
			$('#run_stexaminer').hide();
		}
		load_stemma( selectedStemmaID );
    	// Set up the relationship mapper button
		$('#run_relater').attr( 'action', _get_url([ "relation", textid ]) );
	});
}

// Load the metadata about a tradition into the appropriate div.
function load_textinfo() {
	$('#textinfo_waitbox').hide();
	$('#textinfo_load_status').empty();
	$('#textinfo_container').show();
	$('.texttitle').empty().append( selectedTextInfo.name );
	// Witnesses
	$('#witness_num').empty().append( selectedTextInfo.witnesses.size );
	$('#witness_list').empty().append( selectedTextInfo.witnesses.join( ', ' ) );
	// Who the owner is
	$('#owner_id').empty().append('no one');
	if( selectedTextInfo.owner ) {
		var owneremail = selectedTextInfo.owner;
		var chop = owneremail.indexOf( '@' );
		if( chop > -1 ) {
			owneremail = owneremail.substr( 0, chop + 1 ) + '...';
		}
		$('#owner_id').empty().append( owneremail );
	}
	// Whether or not it is public
	$('#not_public').empty();
	if( selectedTextInfo['public'] == false ) {
		$('#not_public').append('NOT ');
	}
	// What language setting it has, if any
	$('#marked_language').empty().append('no language set');
	if( selectedTextInfo.language && selectedTextInfo.language != 'Default' ) {
		$('#marked_language').empty().append( selectedTextInfo.language );
	}
}	

// Enable / disable the appropriate buttons for paging through the stemma.
function show_stemmapager () {
      $('.pager_left_button').unbind('click').addClass( 'greyed_out' );
      $('.pager_right_button').unbind('click').addClass( 'greyed_out' );
      if( selectedStemmaID > 0 ) {
              $('.pager_left_button').click( function () {
                      load_stemma( selectedStemmaID - 1 );
              }).removeClass( 'greyed_out' );
      }       
      if( selectedStemmaID + 1 < stemmata.length ) {
              $('.pager_right_button').click( function () {
                      load_stemma( selectedStemmaID + 1 );
              }).removeClass( 'greyed_out' );
      }
}

// Load a given stemma SVG into the stemmagraph box.
function load_stemma( idx ) {
	// Load the stemma at idx
	selectedStemmaID = idx;
	show_stemmapager();
	if( idx > -1 ) {
		loadSVG( stemmata[idx] );
		// Stexaminer submit action
		var stexpath = _get_url([ "stexaminer", selectedTextID, idx ]);
		$('#run_stexaminer').attr( 'action', stexpath );
        setTimeout( 'start_element_height = $("#stemma_graph .node")[0].getBBox().height;', 500 );
	}
}

// Load the SVG we are given
function loadSVG(svgData) {
	var svgElement = $('#stemma_graph');

	$(svgElement).svg('destroy');

	$(svgElement).svg({
		loadURL: svgData,
		onLoad : function () {
			var theSVG = svgElement.find('svg');
			var svgoffset = theSVG.offset();
			var browseroffset = 1;
			// Firefox needs a different offset, stupidly enough
			if( navigator.userAgent.indexOf('Firefox') > -1 ) {
				browseroffset = 3; // works for tall images
				// ...but if the SVG is wider than it is tall, Firefox treats
				// the top as being the top of the graph, loaded into the middle
				// of the canvas, but then the margin at the top of the canvas
				// extends upward. So we have to find the actual top of the canvas
				// and correct for *that* instead.
				var vbdim = svgElement.svg().svg('get').root().viewBox.baseVal;
				if( vbdim.height < vbdim.width ) {
					var vbscale = svgElement.width() / vbdim.width;
					var vbrealheight = vbdim.height * vbscale;
					browseroffset = 3 + ( svgElement.height() - vbrealheight ) / 2;
				}
			}
			var topoffset = theSVG.position().top - svgElement.position().top - browseroffset;
			theSVG.offset({ top: svgoffset.top - topoffset, left: svgoffset.left });
		}
	});
}

// General-purpose error-handling function.
// TODO make sure this gets used throughout, where appropriate.
function display_error( jqXHR, el ) {
	var errmsg;
	if( jqXHR.responseText == "" ) {
		errmsg = "perhaps the server went down?"
	} else {
		var errobj;
		try {
			errobj = jQuery.parseJSON( jqXHR.responseText );
			errmsg = errobj.error;
		} catch ( parse_err ) {
			errmsg = "something went wrong on the server."
		}
	}
	var msghtml = $('<span>').attr('class', 'error').text( "An error occurred: " + errmsg );
	$(el).empty().append( msghtml ).show();
}

// Event to enable the upload button when a file has been selected
function file_selected( e ) {
	if( e.files.length == 1 ) {
		$('#upload_button').button('enable');
		$('#new_file_name_container').html( '<span id="new_file_name">' + e.files[0].name + '</span>' );
	} else {
		$('#upload_button').button('disable');
		$('#new_file_name_container').html( '(Use \'pick file\' to select a tradition file to upload.)' );
	}
}

// Implement our own AJAX method that uses the features of XMLHttpRequest2
// but try to let it have a similar interface to jquery.post
// The data var needs to be a FormData() object.
// The callback will be given a single argument, which is the response data
// of the given type.

function post_xhr2( url, data, cb, type ) {
	if( !type ) {
		type = 'json';
	}
	var xhr = new XMLHttpRequest();
	// Set the expected response type
	if( type === 'data' ) {
		xhr.responseType = 'blob';
	} else if( type === 'xml' ) {
		xhr.responseType = 'document';
	} 
	// Post the form
	// Gin up an AJAX settings object
	$.ajaxSetup({ url: url, type: 'POST' });
	xhr.open( 'POST', url, true );
	// Handle the results
	xhr.onload = function( e ) {
		// Get the response and parse it
		// Call the callback with the response, whatever it was
		var xhrs = e.target;
		if( xhrs.status > 199 && xhrs.status < 300  ) { // Success
			var resp;
			if( type === 'json' ) {
				resp = $.parseJSON( xhrs.responseText );
			} else if ( type === 'xml' ) {
				resp = xhrs.responseXML;
			} else if ( type === 'text' ) {
				resp = xhrs.responseText;
			} else {
				resp = xhrs.response;
			}
			cb( resp );
		} else {
			// Trigger the ajaxError...
			_trigger_ajaxerror( e );
		}
	};
	xhr.onerror = _trigger_ajaxerror;
	xhr.onabort = _trigger_ajaxerror;
	xhr.send( data );
}

function _trigger_ajaxerror( e ) {
	var xhr = e.target;
	var thrown = xhr.statusText || 'Request error';
	jQuery.event.trigger( 'ajaxError', [ xhr, $.ajaxSettings, thrown ]);
}

function upload_new () {
	// Serialize the upload form, get the file and attach it to the request,
	// POST the lot and handle the response.
	var newfile = $('#new_file').get(0).files[0];
	var reader = new FileReader();
	reader.onload = function( evt ) {
		var data = new FormData();
		$.each( $('#new_tradition').serializeArray(), function( i, o ) {
				data.append( o.name, o.value );
			});
		data.append( 'file', newfile );
		var upload_url = _get_url([ 'newtradition' ]);
		post_xhr2( upload_url, data, function( ret ) {
			if( ret.id ) {
				$('#upload-collation-dialog').dialog('close');
				refreshDirectory();
				loadTradition( ret.id, ret.name, 1 );
			} else if( ret.error ) {
				$('#upload_status').empty().append( 
					$('<span>').attr('class', 'error').append( ret.error ) );
			}
		}, 'json' );
	};
	reader.onerror = function( evt ) {
		var err_resp = 'File read error';
		if( e.name == 'NotFoundError' ) {
			err_resp = 'File not found';
		} else if ( e.name == 'NotReadableError' ) {
			err_resp == 'File unreadable - is it yours?';
		} else if ( e.name == 'EncodingError' ) {
			err_resp == 'File cannot be encoded - is it too long?';
		} else if ( e.name == 'SecurityError' ) {
			err_resp == 'File read security error';
		}
		// Fake a jqXHR object that we can pass to our generic error handler.
		var jqxhr = { responseText: '{error:"' + err_resp + '"}' };
		display_error( jqxhr, $('#upload_status') );
		$('#upload_button').button('disable');
	}
	
	reader.readAsBinaryString( newfile );
}

// Utility function to neatly construct an application URL
function _get_url( els ) {
	return basepath + els.join('/');
}


$(document).ready( function() {
	// See if we have the browser functionality we need
	// TODO Also think of a test for SVG readiness
	if( !!window.FileReader && !!window.File ) {
		$('#compatibility_check').empty();
	}
	
    // call out to load the directory div
    $('#textinfo_container').hide();
    $('#textinfo_waitbox').hide();
	refreshDirectory();
	
	// Set up the textinfo edit dialog
	$('#textinfo-edit-dialog').dialog({
		autoOpen: false,
		height: 200,
		width: 300,
		modal: true,
		buttons: {
			Save: function (evt) {
				$("#edit_textinfo_status").empty();
				$(evt.target).button("disable");
				var requrl = _get_url([ "textinfo", selectedTextID ]);
				var reqparam = $('#edit_textinfo').serialize();
				$.post( requrl, reqparam, function (data) {
					// Reload the selected text fields
					selectedTextInfo = data;
					load_textinfo();
					// Reenable the button and close the form
					$(evt.target).button("enable");
					$('#textinfo-edit-dialog').dialog('close');
				}, 'json' );
			},
			Cancel: function() {
				$('#textinfo-edit-dialog').dialog('close');
			}
		},
		open: function() {
			$("#edit_textinfo_status").empty();
			// Populate the form fields with the current values
			// edit_(name, language, public, owner)
			$.each([ 'name', 'language', 'owner' ], function( idx, k ) {
				var fname = '#edit_' + k;
				// Special case: language Default is basically language null
				if( k == 'language' && selectedTextInfo[k] == 'Default' ) {
					$(fname).val( "" );
				} else {
					$(fname).val( selectedTextInfo[k] );
				}
			});
			if( selectedTextInfo['public'] == true ) {
				$('#edit_public').attr('checked','true');
			} else {
				$('#edit_public').removeAttr('checked');
			}
		},
	}).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
		$(event.target).parent().find('.ui-button').button("enable");
    	if( ajaxSettings.url.indexOf( 'textinfo' ) > -1 
    		&& ajaxSettings.type == 'POST' ) {
			display_error( jqXHR, $("#edit_textinfo_status") );
    	}
	});

	
	// Set up the stemma editor dialog
	$('#stemma-edit-dialog').dialog({
		autoOpen: false,
		height: 700,
		width: 600,
		modal: true,
		buttons: {
			Save: function (evt) {
				$("#edit_stemma_status").empty();
				$(evt.target).button("disable");
				var stemmaseq = $('#stemmaseq').val();
				var requrl = _get_url([ "stemma", selectedTextID, stemmaseq ]);
				var reqparam = { 'dot': $('#dot_field').val() };
				// TODO We need to stash the literal SVG string in stemmata
				// somehow. Implement accept header on server side to decide
				// whether to send application/json or application/xml?
				$.post( requrl, reqparam, function (data) {
					// We received a stemma SVG string in return. 
					// Update the current stemma sequence number
					selectedStemmaID = data.stemmaid;
					// Stash the answer in our SVG array
					stemmata[selectedStemmaID] = data.stemmasvg;
					// Display the new stemma
					load_stemma( selectedStemmaID );
					// Reenable the button and close the form
					$(evt.target).button("enable");
					$('#stemma-edit-dialog').dialog('close');
				}, 'json' );
			},
			Cancel: function() {
				$('#stemma-edit-dialog').dialog('close');
			}
		},
		open: function(evt) {
			$("#edit_stemma_status").empty();
			var stemmaseq = $('#stemmaseq').val();
			if( stemmaseq == 'n' ) {
				// If we are creating a new stemma, populate the textarea with a
				// bare digraph.
				$(evt.target).dialog('option', 'title', 'Add a new stemma')
				$('#dot_field').val( "digraph stemma {\n\n}" );
			} else {
				// If we are editing a stemma, grab its stemmadot and populate the
				// textarea with that.
				$(evt.target).dialog('option', 'title', 'Edit selected stemma')
				$('#dot_field').val( 'Loading, please wait...' );
				var doturl = _get_url([ "stemmadot", selectedTextID, stemmaseq ]);
				$.getJSON( doturl, function (data) {
					// Re-insert the line breaks
					var dotstring = data.dot.replace(/\|n/gm, "\n");					
					$('#dot_field').val( dotstring );
				});
			}
		},
	}).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
		$(event.target).parent().find('.ui-button').button("enable");
    	if( ajaxSettings.url.indexOf( 'stemma' ) > -1 
    		&& ajaxSettings.type == 'POST' ) {
			display_error( jqXHR, $("#edit_stemma_status") );
    	}
	});
		
	$('#upload-collation-dialog').dialog({
		autoOpen: false,
		height: 360,
		width: 480,
		modal: true,
		buttons: {
		  upload: {
		    text: 'Upload',
		    id: 'upload_button',
		    click: function() {
			    $('#upload_status').empty();
			    $('#upload_button').button("disable");
                upload_new();
            }
		  },
		  pick_file: {
		    text: 'Pick File',
		    id: 'pick_file_button',
		    click: function() {
                $('#new_file').click();
            }
		  },
		  Cancel: function() {
		    $('#upload-collation-dialog').dialog('close');
		  }
		},
		open: function() {
			// Set the upload button to its correct state based on
			// whether a file is loaded
			file_selected( $('#new_file').get(0) );
			$('#upload_status').empty();
		}
	}).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
		// Reset button state
		file_selected( $('#new_file').get(0) );
		// Display error message if applicable
    	if( ajaxSettings.url.indexOf( 'newtradition' ) > -1 
    		&& ajaxSettings.type == 'POST' ) {
			display_error( jqXHR, $("#upload_status") );
    	}
	});;
	
	$('#stemma_graph').mousedown( function(evt) {
        evt.stopPropagation();
        $('#stemma_graph').data( 'mousedown_xy', [evt.clientX, evt.clientY] );
        $('body').mousemove( function(evt) {
            mouse_scale = 1; // for now, was:  mouse_scale = svg_root_element.getScreenCTM().a;
            dx = (evt.clientX - $('#stemma_graph').data( 'mousedown_xy' )[0]) / mouse_scale;
            dy = (evt.clientY - $('#stemma_graph').data( 'mousedown_xy' )[1]) / mouse_scale;
            $('#stemma_graph').data( 'mousedown_xy', [evt.clientX, evt.clientY] );
            var svg_root = $('#stemma_graph svg').svg().svg('get').root();
            var g = $('g.graph', svg_root).get(0);
            current_translate = g.getAttribute( 'transform' ).split(/translate\(/)[1].split(')',1)[0].split(' ');
            new_transform = g.getAttribute( 'transform' ).replace( /translate\([^\)]*\)/, 'translate(' + (parseFloat(current_translate[0]) + dx) + ' ' + (parseFloat(current_translate[1]) + dy) + ')' );
            g.setAttribute( 'transform', new_transform );
            evt.returnValue = false;
            evt.preventDefault();
            return false;
        });
        $('body').mouseup( function(evt) {
            $('body').unbind('mousemove');
            $('body').unbind('mouseup');
        });
	});
	 
	$('#stemma_graph').mousewheel(function (event, delta) {
        event.returnValue = false;
        event.preventDefault();
        if (!delta || delta == null || delta == 0) delta = event.originalEvent.wheelDelta;
        if (!delta || delta == null || delta == 0) delta = -1 * event.originalEvent.detail;
        if( delta < -9 ) { delta = -9 }; 
        var z = 1 + delta/10;
        z = delta > 0 ? 1 : -1;
        var svg_root = $('#stemma_graph svg').svg().svg('get').root();
        var g = $('g.graph', svg_root).get(0);
        if (g && ((z<1 && (g.getScreenCTM().a * start_element_height) > 4.0) || (z>=1 && (g.getScreenCTM().a * start_element_height) < 1000))) {
            var scaleLevel = z/10;
            current_scale = parseFloat( g.getAttribute( 'transform' ).split(/scale\(/)[1].split(')',1)[0].split(' ')[0] );
            new_transform = g.getAttribute( 'transform' ).replace( /scale\([^\)]*\)/, 'scale(' + (current_scale + scaleLevel) + ')' );
            g.setAttribute( 'transform', new_transform );
        }
    });
    
});
Commit	Line	Data
3f9d7ae5	1	// Global state variables
	2	var selectedTextID;
	3	var selectedTextInfo;
	4	var selectedStemmaID = -1;
	5	var stemmata = [];
	6
	7	// Load the names of the appropriate traditions into the directory div.
	8	function refreshDirectory () {
	9	var lmesg = $('#loading_message').clone();
	10	$('#directory').empty().append( lmesg.contents() );
	11	$('#directory').load( _get_url(["directory"]),
	12	function(response, status, xhr) {
	13	if (status == "error") {
	14	var msg = "An error occurred: ";
	15	$("#directory").html(msg + xhr.status + " " + xhr.statusText);
	16	} else {
	17	if( textOnLoad != "" ) {
	18	// Call the click callback for the relevant text, if it is
	19	// in the page.
	20	$('#'+textOnLoad).click();
	21	textOnLoad = "";
	22	}
	23	}
	24	}
	25	);
	26	}
	27
	28	// Load a tradition with its information and stemmata into the tradition
	29	// view pane. Calls load_textinfo.
98a45925	30	function loadTradition( textid, textname, editable ) {
	31	selectedTextID = textid;
	32	// First insert the placeholder image and register an error handler
04469f3e	33	$('#textinfo_load_status').empty();
5f0eda3f	34	$('#stemma_graph').empty();
98a45925	35	$('#textinfo_waitbox').show();
75354c3a	36	$('#textinfo_container').hide().ajaxError(
	37	function(event, jqXHR, ajaxSettings, thrownError) {
	38	if( ajaxSettings.url.indexOf( 'textinfo' ) > -1 && ajaxSettings.type == 'GET' ) {
	39	$('#textinfo_waitbox').hide();
	40	$('#textinfo_container').show();
	41	display_error( jqXHR, $("#textinfo_load_status") );
98a45925	42	}
75354c3a	43	});
	44
	45	// Hide the functionality that is irrelevant
	46	if( editable ) {
ce1c5863	47	$('#open_stemma_add').show();
	48	$('#open_stemma_edit').show();
	49	$('#open_textinfo_edit').show();
75354c3a	50	} else {
ce1c5863	51	$('#open_stemma_add').hide();
	52	$('#open_stemma_edit').hide();
	53	$('#open_textinfo_edit').hide();
75354c3a	54	}
75354c3a	55
62723740	56	// Then get and load the actual content.
98a45925	57	// TODO: scale #stemma_graph both horizontally and vertically
f6a8db89	58	// TODO: load svgs from SVG.Jquery (to make scaling react in Safari)
3f9d7ae5	59	$.getJSON( _get_url([ "textinfo", textid ]), function (textdata) {
98a45925	60	// Add the scalar data
75354c3a	61	selectedTextInfo = textdata;
	62	load_textinfo();
	63	// Add the stemma(ta) and set up the stexaminer button
98a45925	64	stemmata = textdata.stemmata;
	65	if( stemmata.length ) {
	66	selectedStemmaID = 0;
57e3a008	67	$('#run_stexaminer').show();
65a0c9c6	68	} else {
57e3a008	69	selectedStemmaID = -1;
65a0c9c6	70	$('#open_stemma_edit').hide();
65a0c9c6	71	$('#run_stexaminer').hide();
65a0c9c6	72	}
3f9d7ae5	73	load_stemma( selectedStemmaID );
98a45925	74	// Set up the relationship mapper button
3f9d7ae5	75	$('#run_relater').attr( 'action', _get_url([ "relation", textid ]) );
98a45925	76	});
	77	}
	78
3f9d7ae5	79	// Load the metadata about a tradition into the appropriate div.
75354c3a	80	function load_textinfo() {
	81	$('#textinfo_waitbox').hide();
	82	$('#textinfo_load_status').empty();
	83	$('#textinfo_container').show();
	84	$('.texttitle').empty().append( selectedTextInfo.name );
	85	// Witnesses
	86	$('#witness_num').empty().append( selectedTextInfo.witnesses.size );
	87	$('#witness_list').empty().append( selectedTextInfo.witnesses.join( ', ' ) );
	88	// Who the owner is
	89	$('#owner_id').empty().append('no one');
	90	if( selectedTextInfo.owner ) {
897a22fc	91	var owneremail = selectedTextInfo.owner;
	92	var chop = owneremail.indexOf( '@' );
	93	if( chop > -1 ) {
	94	owneremail = owneremail.substr( 0, chop + 1 ) + '...';
	95	}
	96	$('#owner_id').empty().append( owneremail );
75354c3a	97	}
	98	// Whether or not it is public
	99	$('#not_public').empty();
	100	if( selectedTextInfo['public'] == false ) {
	101	$('#not_public').append('NOT ');
	102	}
	103	// What language setting it has, if any
	104	$('#marked_language').empty().append('no language set');
	105	if( selectedTextInfo.language && selectedTextInfo.language != 'Default' ) {
	106	$('#marked_language').empty().append( selectedTextInfo.language );
	107	}
	108	}
	109
3f9d7ae5	110	// Enable / disable the appropriate buttons for paging through the stemma.
65a0c9c6	111	function show_stemmapager () {
bf81fb57	112	$('.pager_left_button').unbind('click').addClass( 'greyed_out' );
bf81fb57	113	$('.pager_right_button').unbind('click').addClass( 'greyed_out' );
65a0c9c6	114	if( selectedStemmaID > 0 ) {
	115	$('.pager_left_button').click( function () {
	116	load_stemma( selectedStemmaID - 1 );
bf81fb57	117	}).removeClass( 'greyed_out' );
65a0c9c6	118	}
	119	if( selectedStemmaID + 1 < stemmata.length ) {
	120	$('.pager_right_button').click( function () {
	121	load_stemma( selectedStemmaID + 1 );
bf81fb57	122	}).removeClass( 'greyed_out' );
65a0c9c6	123	}
	124	}
	125
3f9d7ae5	126	// Load a given stemma SVG into the stemmagraph box.
75354c3a	127	function load_stemma( idx ) {
65a0c9c6	128	// Load the stemma at idx
65a0c9c6	129	selectedStemmaID = idx;
57e3a008	130	show_stemmapager();
98a45925	131	if( idx > -1 ) {
bd3ccd15	132	loadSVG( stemmata[idx] );
98a45925	133	// Stexaminer submit action
3f9d7ae5	134	var stexpath = _get_url([ "stexaminer", selectedTextID, idx ]);
98a45925	135	$('#run_stexaminer').attr( 'action', stexpath );
40803b80	136	setTimeout( 'start_element_height = $("#stemma_graph .node")[0].getBBox().height;', 500 );
98a45925	137	}
5ba6c2b4	138	}
75354c3a	139
bd3ccd15	140	// Load the SVG we are given
	141	function loadSVG(svgData) {
	142	var svgElement = $('#stemma_graph');
	143
	144	$(svgElement).svg('destroy');
	145
	146	$(svgElement).svg({
	147	loadURL: svgData,
	148	onLoad : function () {
	149	var theSVG = svgElement.find('svg');
	150	var svgoffset = theSVG.offset();
bd3ccd15	151	var browseroffset = 1;
23f8bfc2	152	// Firefox needs a different offset, stupidly enough
bd3ccd15	153	if( navigator.userAgent.indexOf('Firefox') > -1 ) {
23f8bfc2	154	browseroffset = 3; // works for tall images
	155	// ...but if the SVG is wider than it is tall, Firefox treats
	156	// the top as being the top of the graph, loaded into the middle
	157	// of the canvas, but then the margin at the top of the canvas
	158	// extends upward. So we have to find the actual top of the canvas
	159	// and correct for that instead.
	160	var vbdim = svgElement.svg().svg('get').root().viewBox.baseVal;
	161	if( vbdim.height < vbdim.width ) {
	162	var vbscale = svgElement.width() / vbdim.width;
	163	var vbrealheight = vbdim.height * vbscale;
	164	browseroffset = 3 + ( svgElement.height() - vbrealheight ) / 2;
	165	}
bd3ccd15	166	}
bd3ccd15	167	var topoffset = theSVG.position().top - svgElement.position().top - browseroffset;
bd3ccd15	168	theSVG.offset({ top: svgoffset.top - topoffset, left: svgoffset.left });
	169	}
	170	});
	171	}
	172
3f9d7ae5	173	// General-purpose error-handling function.
3f9d7ae5	174	// TODO make sure this gets used throughout, where appropriate.
75354c3a	175	function display_error( jqXHR, el ) {
ce1c5863	176	var errmsg;
	177	if( jqXHR.responseText == "" ) {
	178	errmsg = "perhaps the server went down?"
75354c3a	179	} else {
ce1c5863	180	var errobj;
	181	try {
	182	errobj = jQuery.parseJSON( jqXHR.responseText );
	183	errmsg = errobj.error;
	184	} catch ( parse_err ) {
	185	errmsg = "something went wrong on the server."
	186	}
75354c3a	187	}
ce1c5863	188	var msghtml = $('<span>').attr('class', 'error').text( "An error occurred: " + errmsg );
75354c3a	189	$(el).empty().append( msghtml ).show();
3f9d7ae5	190	}
3f9d7ae5	191
e0b90236	192	// Event to enable the upload button when a file has been selected
	193	function file_selected( e ) {
	194	if( e.files.length == 1 ) {
	195	$('#upload_button').button('enable');
ab0d1218	196	$('#new_file_name_container').html( '<span id="new_file_name">' + e.files[0].name + '</span>' );
e0b90236	197	} else {
e0b90236	198	$('#upload_button').button('disable');
ab0d1218	199	$('#new_file_name_container').html( '(Use \'pick file\' to select a tradition file to upload.)' );
e0b90236	200	}
	201	}
	202
2ece58b3	203	// Implement our own AJAX method that uses the features of XMLHttpRequest2
	204	// but try to let it have a similar interface to jquery.post
	205	// The data var needs to be a FormData() object.
	206	// The callback will be given a single argument, which is the response data
	207	// of the given type.
	208
	209	function post_xhr2( url, data, cb, type ) {
	210	if( !type ) {
	211	type = 'json';
	212	}
	213	var xhr = new XMLHttpRequest();
	214	// Set the expected response type
	215	if( type === 'data' ) {
	216	xhr.responseType = 'blob';
	217	} else if( type === 'xml' ) {
	218	xhr.responseType = 'document';
	219	}
	220	// Post the form
	221	// Gin up an AJAX settings object
	222	$.ajaxSetup({ url: url, type: 'POST' });
	223	xhr.open( 'POST', url, true );
	224	// Handle the results
	225	xhr.onload = function( e ) {
	226	// Get the response and parse it
	227	// Call the callback with the response, whatever it was
	228	var xhrs = e.target;
	229	if( xhrs.status > 199 && xhrs.status < 300 ) { // Success
	230	var resp;
	231	if( type === 'json' ) {
	232	resp = $.parseJSON( xhrs.responseText );
	233	} else if ( type === 'xml' ) {
	234	resp = xhrs.responseXML;
	235	} else if ( type === 'text' ) {
	236	resp = xhrs.responseText;
	237	} else {
	238	resp = xhrs.response;
	239	}
	240	cb( resp );
	241	} else {
	242	// Trigger the ajaxError...
	243	_trigger_ajaxerror( e );
	244	}
	245	};
	246	xhr.onerror = _trigger_ajaxerror;
	247	xhr.onabort = _trigger_ajaxerror;
	248	xhr.send( data );
	249	}
	250
	251	function _trigger_ajaxerror( e ) {
	252	var xhr = e.target;
	253	var thrown = xhr.statusText \|\| 'Request error';
	254	jQuery.event.trigger( 'ajaxError', [ xhr, $.ajaxSettings, thrown ]);
	255	}
	256
e0b90236	257	function upload_new () {
	258	// Serialize the upload form, get the file and attach it to the request,
	259	// POST the lot and handle the response.
	260	var newfile = $('#new_file').get(0).files[0];
	261	var reader = new FileReader();
	262	reader.onload = function( evt ) {
2ece58b3	263	var data = new FormData();
	264	$.each( $('#new_tradition').serializeArray(), function( i, o ) {
	265	data.append( o.name, o.value );
	266	});
	267	data.append( 'file', newfile );
e0b90236	268	var upload_url = _get_url([ 'newtradition' ]);
2ece58b3	269	post_xhr2( upload_url, data, function( ret ) {
e0b90236	270	if( ret.id ) {
	271	$('#upload-collation-dialog').dialog('close');
	272	refreshDirectory();
	273	loadTradition( ret.id, ret.name, 1 );
	274	} else if( ret.error ) {
	275	$('#upload_status').empty().append(
	276	$('<span>').attr('class', 'error').append( ret.error ) );
	277	}
2ece58b3	278	}, 'json' );
e0b90236	279	};
	280	reader.onerror = function( evt ) {
	281	var err_resp = 'File read error';
	282	if( e.name == 'NotFoundError' ) {
	283	err_resp = 'File not found';
	284	} else if ( e.name == 'NotReadableError' ) {
	285	err_resp == 'File unreadable - is it yours?';
	286	} else if ( e.name == 'EncodingError' ) {
	287	err_resp == 'File cannot be encoded - is it too long?';
	288	} else if ( e.name == 'SecurityError' ) {
	289	err_resp == 'File read security error';
	290	}
	291	// Fake a jqXHR object that we can pass to our generic error handler.
	292	var jqxhr = { responseText: '{error:"' + err_resp + '"}' };
	293	display_error( jqxhr, $('#upload_status') );
	294	$('#upload_button').button('disable');
	295	}
	296
	297	reader.readAsBinaryString( newfile );
3f9d7ae5	298	}
	299
	300	// Utility function to neatly construct an application URL
	301	function _get_url( els ) {
	302	return basepath + els.join('/');
	303	}
	304
bd3ccd15	305
3f9d7ae5	306	$(document).ready( function() {
50778a5d	307	// See if we have the browser functionality we need
50778a5d	308	// TODO Also think of a test for SVG readiness
7c25980f	309	if( !!window.FileReader && !!window.File ) {
50778a5d	310	$('#compatibility_check').empty();
	311	}
	312
3f9d7ae5	313	// call out to load the directory div
	314	$('#textinfo_container').hide();
	315	$('#textinfo_waitbox').hide();
	316	refreshDirectory();
	317
	318	// Set up the textinfo edit dialog
	319	$('#textinfo-edit-dialog').dialog({
	320	autoOpen: false,
	321	height: 200,
	322	width: 300,
	323	modal: true,
	324	buttons: {
	325	Save: function (evt) {
	326	$("#edit_textinfo_status").empty();
	327	$(evt.target).button("disable");
	328	var requrl = _get_url([ "textinfo", selectedTextID ]);
	329	var reqparam = $('#edit_textinfo').serialize();
	330	$.post( requrl, reqparam, function (data) {
	331	// Reload the selected text fields
	332	selectedTextInfo = data;
	333	load_textinfo();
	334	// Reenable the button and close the form
	335	$(evt.target).button("enable");
	336	$('#textinfo-edit-dialog').dialog('close');
	337	}, 'json' );
	338	},
	339	Cancel: function() {
	340	$('#textinfo-edit-dialog').dialog('close');
	341	}
	342	},
	343	open: function() {
	344	$("#edit_textinfo_status").empty();
	345	// Populate the form fields with the current values
	346	// edit_(name, language, public, owner)
	347	$.each([ 'name', 'language', 'owner' ], function( idx, k ) {
	348	var fname = '#edit_' + k;
	349	// Special case: language Default is basically language null
	350	if( k == 'language' && selectedTextInfo[k] == 'Default' ) {
	351	$(fname).val( "" );
	352	} else {
	353	$(fname).val( selectedTextInfo[k] );
	354	}
	355	});
	356	if( selectedTextInfo['public'] == true ) {
	357	$('#edit_public').attr('checked','true');
	358	} else {
	359	$('#edit_public').removeAttr('checked');
	360	}
	361	},
	362	}).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
	363	$(event.target).parent().find('.ui-button').button("enable");
	364	if( ajaxSettings.url.indexOf( 'textinfo' ) > -1
	365	&& ajaxSettings.type == 'POST' ) {
	366	display_error( jqXHR, $("#edit_textinfo_status") );
	367	}
	368	});
	369
	370
	371	// Set up the stemma editor dialog
	372	$('#stemma-edit-dialog').dialog({
	373	autoOpen: false,
	374	height: 700,
	375	width: 600,
	376	modal: true,
377	buttons: {
378	Save: function (evt) {
379	$("#edit_stemma_status").empty();
380	$(evt.target).button("disable");
381	var stemmaseq = $('#stemmaseq').val();
382	var requrl = _get_url([ "stemma", selectedTextID, stemmaseq ]);
383	var reqparam = { 'dot': $('#dot_field').val() };
384	// TODO We need to stash the literal SVG string in stemmata
385	// somehow. Implement accept header on server side to decide
386	// whether to send application/json or application/xml?
387	$.post( requrl, reqparam, function (data) {
388	// We received a stemma SVG string in return.
389	// Update the current stemma sequence number
390	selectedStemmaID = data.stemmaid;
391	// Stash the answer in our SVG array
392	stemmata[selectedStemmaID] = data.stemmasvg;
393	// Display the new stemma
394	load_stemma( selectedStemmaID );
395	// Reenable the button and close the form
396	$(evt.target).button("enable");
397	$('#stemma-edit-dialog').dialog('close');
398	}, 'json' );
399	},
400	Cancel: function() {
401	$('#stemma-edit-dialog').dialog('close');
402	}
403	},
404	open: function(evt) {
405	$("#edit_stemma_status").empty();
406	var stemmaseq = $('#stemmaseq').val();
407	if( stemmaseq == 'n' ) {
408	// If we are creating a new stemma, populate the textarea with a
409	// bare digraph.
410	$(evt.target).dialog('option', 'title', 'Add a new stemma')
411	$('#dot_field').val( "digraph stemma {\n\n}" );
412	} else {
413	// If we are editing a stemma, grab its stemmadot and populate the
414	// textarea with that.
415	$(evt.target).dialog('option', 'title', 'Edit selected stemma')
416	$('#dot_field').val( 'Loading, please wait...' );
417	var doturl = _get_url([ "stemmadot", selectedTextID, stemmaseq ]);
418	$.getJSON( doturl, function (data) {
419	// Re-insert the line breaks
420	var dotstring = data.dot.replace(/\\|n/gm, "\n");
421	$('#dot_field').val( dotstring );
422	});
423	}
424	},
425	}).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
426	$(event.target).parent().find('.ui-button').button("enable");
427	if( ajaxSettings.url.indexOf( 'stemma' ) > -1
428	&& ajaxSettings.type == 'POST' ) {
429	display_error( jqXHR, $("#edit_stemma_status") );
430	}
431	});
432
433	$('#upload-collation-dialog').dialog({
434	autoOpen: false,
e0b90236	435	height: 360,
3f9d7ae5	436	width: 480,
	437	modal: true,
	438	buttons: {
3f9d7ae5	439	upload: {
	440	text: 'Upload',
	441	id: 'upload_button',
	442	click: function() {
	443	$('#upload_status').empty();
e0b90236	444	$('#upload_button').button("disable");
e0b90236	445	upload_new();
3f9d7ae5	446	}
3f9d7ae5	447	},
ab0d1218	448	pick_file: {
	449	text: 'Pick File',
	450	id: 'pick_file_button',
	451	click: function() {
	452	$('#new_file').click();
	453	}
	454	},
3f9d7ae5	455	Cancel: function() {
	456	$('#upload-collation-dialog').dialog('close');
	457	}
	458	},
e0b90236	459	open: function() {
	460	// Set the upload button to its correct state based on
	461	// whether a file is loaded
	462	file_selected( $('#new_file').get(0) );
2ece58b3	463	$('#upload_status').empty();
3f9d7ae5	464	}
e0b90236	465	}).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
	466	// Reset button state
	467	file_selected( $('#new_file').get(0) );
	468	// Display error message if applicable
	469	if( ajaxSettings.url.indexOf( 'newtradition' ) > -1
	470	&& ajaxSettings.type == 'POST' ) {
	471	display_error( jqXHR, $("#upload_status") );
	472	}
	473	});;
3f9d7ae5	474
	475	$('#stemma_graph').mousedown( function(evt) {
	476	evt.stopPropagation();
	477	$('#stemma_graph').data( 'mousedown_xy', [evt.clientX, evt.clientY] );
	478	$('body').mousemove( function(evt) {
	479	mouse_scale = 1; // for now, was: mouse_scale = svg_root_element.getScreenCTM().a;
	480	dx = (evt.clientX - $('#stemma_graph').data( 'mousedown_xy' )[0]) / mouse_scale;
	481	dy = (evt.clientY - $('#stemma_graph').data( 'mousedown_xy' )[1]) / mouse_scale;
	482	$('#stemma_graph').data( 'mousedown_xy', [evt.clientX, evt.clientY] );
	483	var svg_root = $('#stemma_graph svg').svg().svg('get').root();
	484	var g = $('g.graph', svg_root).get(0);
	485	current_translate = g.getAttribute( 'transform' ).split(/translate\(/)[1].split(')',1)[0].split(' ');
	486	new_transform = g.getAttribute( 'transform' ).replace( /translate\([^\)]*\)/, 'translate(' + (parseFloat(current_translate[0]) + dx) + ' ' + (parseFloat(current_translate[1]) + dy) + ')' );
	487	g.setAttribute( 'transform', new_transform );
	488	evt.returnValue = false;
	489	evt.preventDefault();
	490	return false;
	491	});
	492	$('body').mouseup( function(evt) {
	493	$('body').unbind('mousemove');
	494	$('body').unbind('mouseup');
	495	});
	496	});
	497
	498	$('#stemma_graph').mousewheel(function (event, delta) {
	499	event.returnValue = false;
	500	event.preventDefault();
	501	if (!delta \|\| delta == null \|\| delta == 0) delta = event.originalEvent.wheelDelta;
	502	if (!delta \|\| delta == null \|\| delta == 0) delta = -1 * event.originalEvent.detail;
	503	if( delta < -9 ) { delta = -9 };
	504	var z = 1 + delta/10;
	505	z = delta > 0 ? 1 : -1;
	506	var svg_root = $('#stemma_graph svg').svg().svg('get').root();
	507	var g = $('g.graph', svg_root).get(0);
	508	if (g && ((z<1 && (g.getScreenCTM().a * start_element_height) > 4.0) \|\| (z>=1 && (g.getScreenCTM().a * start_element_height) < 1000))) {
	509	var scaleLevel = z/10;
	510	current_scale = parseFloat( g.getAttribute( 'transform' ).split(/scale\(/)[1].split(')',1)[0].split(' ')[0] );
	511	new_transform = g.getAttribute( 'transform' ).replace( /scale\([^\)]*\)/, 'scale(' + (current_scale + scaleLevel) + ')' );
	512	g.setAttribute( 'transform', new_transform );
	513	}
	514	});
	515
	516	});