[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 ) {
		$('#owner_id').empty().append( selectedTextInfo.owner );
	}
	// 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');
	} else {
		$('#upload_button').button('disable');
	}
}

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