[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();
    	$('#relatebutton_label').text('View collation and edit relationships');
    } else {
    	$('#open_stemma_add').hide();
    	$('#open_stemma_edit').hide();
    	$('#open_textinfo_edit').hide();
    	$('#relatebutton_label').text('View collation and relationships');
    }

    // 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();
cbd23059	50	$('#relatebutton_label').text('View collation and edit relationships');
75354c3a	51	} else {
ce1c5863	52	$('#open_stemma_add').hide();
	53	$('#open_stemma_edit').hide();
	54	$('#open_textinfo_edit').hide();
cbd23059	55	$('#relatebutton_label').text('View collation and relationships');
75354c3a	56	}
75354c3a	57
62723740	58	// Then get and load the actual content.
98a45925	59	// TODO: scale #stemma_graph both horizontally and vertically
f6a8db89	60	// TODO: load svgs from SVG.Jquery (to make scaling react in Safari)
3f9d7ae5	61	$.getJSON( _get_url([ "textinfo", textid ]), function (textdata) {
98a45925	62	// Add the scalar data
75354c3a	63	selectedTextInfo = textdata;
	64	load_textinfo();
	65	// Add the stemma(ta) and set up the stexaminer button
98a45925	66	stemmata = textdata.stemmata;
	67	if( stemmata.length ) {
	68	selectedStemmaID = 0;
57e3a008	69	$('#run_stexaminer').show();
65a0c9c6	70	} else {
57e3a008	71	selectedStemmaID = -1;
65a0c9c6	72	$('#open_stemma_edit').hide();
65a0c9c6	73	$('#run_stexaminer').hide();
65a0c9c6	74	}
3f9d7ae5	75	load_stemma( selectedStemmaID );
98a45925	76	// Set up the relationship mapper button
3f9d7ae5	77	$('#run_relater').attr( 'action', _get_url([ "relation", textid ]) );
98a45925	78	});
	79	}
	80
3f9d7ae5	81	// Load the metadata about a tradition into the appropriate div.
75354c3a	82	function load_textinfo() {
	83	$('#textinfo_waitbox').hide();
	84	$('#textinfo_load_status').empty();
	85	$('#textinfo_container').show();
	86	$('.texttitle').empty().append( selectedTextInfo.name );
	87	// Witnesses
	88	$('#witness_num').empty().append( selectedTextInfo.witnesses.size );
	89	$('#witness_list').empty().append( selectedTextInfo.witnesses.join( ', ' ) );
	90	// Who the owner is
	91	$('#owner_id').empty().append('no one');
	92	if( selectedTextInfo.owner ) {
897a22fc	93	var owneremail = selectedTextInfo.owner;
	94	var chop = owneremail.indexOf( '@' );
	95	if( chop > -1 ) {
	96	owneremail = owneremail.substr( 0, chop + 1 ) + '...';
	97	}
	98	$('#owner_id').empty().append( owneremail );
75354c3a	99	}
	100	// Whether or not it is public
	101	$('#not_public').empty();
	102	if( selectedTextInfo['public'] == false ) {
	103	$('#not_public').append('NOT ');
	104	}
	105	// What language setting it has, if any
	106	$('#marked_language').empty().append('no language set');
	107	if( selectedTextInfo.language && selectedTextInfo.language != 'Default' ) {
	108	$('#marked_language').empty().append( selectedTextInfo.language );
	109	}
	110	}
	111
3f9d7ae5	112	// Enable / disable the appropriate buttons for paging through the stemma.
65a0c9c6	113	function show_stemmapager () {
bf81fb57	114	$('.pager_left_button').unbind('click').addClass( 'greyed_out' );
bf81fb57	115	$('.pager_right_button').unbind('click').addClass( 'greyed_out' );
65a0c9c6	116	if( selectedStemmaID > 0 ) {
	117	$('.pager_left_button').click( function () {
	118	load_stemma( selectedStemmaID - 1 );
bf81fb57	119	}).removeClass( 'greyed_out' );
65a0c9c6	120	}
	121	if( selectedStemmaID + 1 < stemmata.length ) {
	122	$('.pager_right_button').click( function () {
	123	load_stemma( selectedStemmaID + 1 );
bf81fb57	124	}).removeClass( 'greyed_out' );
65a0c9c6	125	}
	126	}
	127
3f9d7ae5	128	// Load a given stemma SVG into the stemmagraph box.
75354c3a	129	function load_stemma( idx ) {
65a0c9c6	130	// Load the stemma at idx
65a0c9c6	131	selectedStemmaID = idx;
57e3a008	132	show_stemmapager();
98a45925	133	if( idx > -1 ) {
bd3ccd15	134	loadSVG( stemmata[idx] );
98a45925	135	// Stexaminer submit action
3f9d7ae5	136	var stexpath = _get_url([ "stexaminer", selectedTextID, idx ]);
98a45925	137	$('#run_stexaminer').attr( 'action', stexpath );
40803b80	138	setTimeout( 'start_element_height = $("#stemma_graph .node")[0].getBBox().height;', 500 );
98a45925	139	}
5ba6c2b4	140	}
75354c3a	141
bd3ccd15	142	// Load the SVG we are given
	143	function loadSVG(svgData) {
	144	var svgElement = $('#stemma_graph');
	145
	146	$(svgElement).svg('destroy');
	147
	148	$(svgElement).svg({
	149	loadURL: svgData,
	150	onLoad : function () {
	151	var theSVG = svgElement.find('svg');
	152	var svgoffset = theSVG.offset();
bd3ccd15	153	var browseroffset = 1;
23f8bfc2	154	// Firefox needs a different offset, stupidly enough
bd3ccd15	155	if( navigator.userAgent.indexOf('Firefox') > -1 ) {
23f8bfc2	156	browseroffset = 3; // works for tall images
	157	// ...but if the SVG is wider than it is tall, Firefox treats
	158	// the top as being the top of the graph, loaded into the middle
	159	// of the canvas, but then the margin at the top of the canvas
	160	// extends upward. So we have to find the actual top of the canvas
	161	// and correct for that instead.
	162	var vbdim = svgElement.svg().svg('get').root().viewBox.baseVal;
	163	if( vbdim.height < vbdim.width ) {
	164	var vbscale = svgElement.width() / vbdim.width;
	165	var vbrealheight = vbdim.height * vbscale;
	166	browseroffset = 3 + ( svgElement.height() - vbrealheight ) / 2;
	167	}
bd3ccd15	168	}
bd3ccd15	169	var topoffset = theSVG.position().top - svgElement.position().top - browseroffset;
bd3ccd15	170	theSVG.offset({ top: svgoffset.top - topoffset, left: svgoffset.left });
	171	}
	172	});
	173	}
	174
3f9d7ae5	175	// General-purpose error-handling function.
3f9d7ae5	176	// TODO make sure this gets used throughout, where appropriate.
75354c3a	177	function display_error( jqXHR, el ) {
ce1c5863	178	var errmsg;
	179	if( jqXHR.responseText == "" ) {
	180	errmsg = "perhaps the server went down?"
75354c3a	181	} else {
ce1c5863	182	var errobj;
	183	try {
	184	errobj = jQuery.parseJSON( jqXHR.responseText );
	185	errmsg = errobj.error;
	186	} catch ( parse_err ) {
	187	errmsg = "something went wrong on the server."
	188	}
75354c3a	189	}
ce1c5863	190	var msghtml = $('<span>').attr('class', 'error').text( "An error occurred: " + errmsg );
75354c3a	191	$(el).empty().append( msghtml ).show();
3f9d7ae5	192	}
3f9d7ae5	193
e0b90236	194	// Event to enable the upload button when a file has been selected
	195	function file_selected( e ) {
	196	if( e.files.length == 1 ) {
	197	$('#upload_button').button('enable');
ab0d1218	198	$('#new_file_name_container').html( '<span id="new_file_name">' + e.files[0].name + '</span>' );
e0b90236	199	} else {
e0b90236	200	$('#upload_button').button('disable');
ab0d1218	201	$('#new_file_name_container').html( '(Use \'pick file\' to select a tradition file to upload.)' );
e0b90236	202	}
	203	}
	204
2ece58b3	205	// Implement our own AJAX method that uses the features of XMLHttpRequest2
	206	// but try to let it have a similar interface to jquery.post
	207	// The data var needs to be a FormData() object.
	208	// The callback will be given a single argument, which is the response data
	209	// of the given type.
	210
	211	function post_xhr2( url, data, cb, type ) {
	212	if( !type ) {
	213	type = 'json';
	214	}
	215	var xhr = new XMLHttpRequest();
	216	// Set the expected response type
	217	if( type === 'data' ) {
	218	xhr.responseType = 'blob';
	219	} else if( type === 'xml' ) {
	220	xhr.responseType = 'document';
	221	}
	222	// Post the form
	223	// Gin up an AJAX settings object
	224	$.ajaxSetup({ url: url, type: 'POST' });
	225	xhr.open( 'POST', url, true );
	226	// Handle the results
	227	xhr.onload = function( e ) {
	228	// Get the response and parse it
	229	// Call the callback with the response, whatever it was
	230	var xhrs = e.target;
	231	if( xhrs.status > 199 && xhrs.status < 300 ) { // Success
	232	var resp;
	233	if( type === 'json' ) {
	234	resp = $.parseJSON( xhrs.responseText );
	235	} else if ( type === 'xml' ) {
	236	resp = xhrs.responseXML;
	237	} else if ( type === 'text' ) {
	238	resp = xhrs.responseText;
	239	} else {
	240	resp = xhrs.response;
	241	}
	242	cb( resp );
	243	} else {
	244	// Trigger the ajaxError...
	245	_trigger_ajaxerror( e );
	246	}
	247	};
	248	xhr.onerror = _trigger_ajaxerror;
	249	xhr.onabort = _trigger_ajaxerror;
	250	xhr.send( data );
	251	}
	252
	253	function _trigger_ajaxerror( e ) {
	254	var xhr = e.target;
	255	var thrown = xhr.statusText \|\| 'Request error';
	256	jQuery.event.trigger( 'ajaxError', [ xhr, $.ajaxSettings, thrown ]);
	257	}
	258
e0b90236	259	function upload_new () {
	260	// Serialize the upload form, get the file and attach it to the request,
	261	// POST the lot and handle the response.
	262	var newfile = $('#new_file').get(0).files[0];
	263	var reader = new FileReader();
	264	reader.onload = function( evt ) {
2ece58b3	265	var data = new FormData();
	266	$.each( $('#new_tradition').serializeArray(), function( i, o ) {
	267	data.append( o.name, o.value );
	268	});
	269	data.append( 'file', newfile );
e0b90236	270	var upload_url = _get_url([ 'newtradition' ]);
2ece58b3	271	post_xhr2( upload_url, data, function( ret ) {
e0b90236	272	if( ret.id ) {
	273	$('#upload-collation-dialog').dialog('close');
	274	refreshDirectory();
	275	loadTradition( ret.id, ret.name, 1 );
	276	} else if( ret.error ) {
	277	$('#upload_status').empty().append(
	278	$('<span>').attr('class', 'error').append( ret.error ) );
	279	}
2ece58b3	280	}, 'json' );
e0b90236	281	};
	282	reader.onerror = function( evt ) {
	283	var err_resp = 'File read error';
	284	if( e.name == 'NotFoundError' ) {
	285	err_resp = 'File not found';
	286	} else if ( e.name == 'NotReadableError' ) {
	287	err_resp == 'File unreadable - is it yours?';
	288	} else if ( e.name == 'EncodingError' ) {
	289	err_resp == 'File cannot be encoded - is it too long?';
	290	} else if ( e.name == 'SecurityError' ) {
	291	err_resp == 'File read security error';
	292	}
	293	// Fake a jqXHR object that we can pass to our generic error handler.
	294	var jqxhr = { responseText: '{error:"' + err_resp + '"}' };
	295	display_error( jqxhr, $('#upload_status') );
	296	$('#upload_button').button('disable');
	297	}
	298
	299	reader.readAsBinaryString( newfile );
3f9d7ae5	300	}
	301
	302	// Utility function to neatly construct an application URL
	303	function _get_url( els ) {
	304	return basepath + els.join('/');
	305	}
	306
bd3ccd15	307
3f9d7ae5	308	$(document).ready( function() {
50778a5d	309	// See if we have the browser functionality we need
50778a5d	310	// TODO Also think of a test for SVG readiness
7c25980f	311	if( !!window.FileReader && !!window.File ) {
50778a5d	312	$('#compatibility_check').empty();
	313	}
	314
3f9d7ae5	315	// call out to load the directory div
	316	$('#textinfo_container').hide();
	317	$('#textinfo_waitbox').hide();
	318	refreshDirectory();
	319
	320	// Set up the textinfo edit dialog
	321	$('#textinfo-edit-dialog').dialog({
	322	autoOpen: false,
	323	height: 200,
	324	width: 300,
	325	modal: true,
	326	buttons: {
	327	Save: function (evt) {
	328	$("#edit_textinfo_status").empty();
	329	$(evt.target).button("disable");
	330	var requrl = _get_url([ "textinfo", selectedTextID ]);
	331	var reqparam = $('#edit_textinfo').serialize();
	332	$.post( requrl, reqparam, function (data) {
	333	// Reload the selected text fields
	334	selectedTextInfo = data;
	335	load_textinfo();
	336	// Reenable the button and close the form
	337	$(evt.target).button("enable");
	338	$('#textinfo-edit-dialog').dialog('close');
	339	}, 'json' );
	340	},
	341	Cancel: function() {
	342	$('#textinfo-edit-dialog').dialog('close');
	343	}
	344	},
	345	open: function() {
	346	$("#edit_textinfo_status").empty();
	347	// Populate the form fields with the current values
	348	// edit_(name, language, public, owner)
	349	$.each([ 'name', 'language', 'owner' ], function( idx, k ) {
	350	var fname = '#edit_' + k;
	351	// Special case: language Default is basically language null
	352	if( k == 'language' && selectedTextInfo[k] == 'Default' ) {
	353	$(fname).val( "" );
	354	} else {
	355	$(fname).val( selectedTextInfo[k] );
	356	}
	357	});
	358	if( selectedTextInfo['public'] == true ) {
	359	$('#edit_public').attr('checked','true');
	360	} else {
	361	$('#edit_public').removeAttr('checked');
	362	}
	363	},
	364	}).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
	365	$(event.target).parent().find('.ui-button').button("enable");
	366	if( ajaxSettings.url.indexOf( 'textinfo' ) > -1
	367	&& ajaxSettings.type == 'POST' ) {
	368	display_error( jqXHR, $("#edit_textinfo_status") );
	369	}
	370	});
	371
	372
	373	// Set up the stemma editor dialog
	374	$('#stemma-edit-dialog').dialog({
	375	autoOpen: false,
	376	height: 700,
	377	width: 600,
	378	modal: true,
379	buttons: {
380	Save: function (evt) {
381	$("#edit_stemma_status").empty();
382	$(evt.target).button("disable");
383	var stemmaseq = $('#stemmaseq').val();
384	var requrl = _get_url([ "stemma", selectedTextID, stemmaseq ]);
385	var reqparam = { 'dot': $('#dot_field').val() };
386	// TODO We need to stash the literal SVG string in stemmata
387	// somehow. Implement accept header on server side to decide
388	// whether to send application/json or application/xml?
389	$.post( requrl, reqparam, function (data) {
390	// We received a stemma SVG string in return.
391	// Update the current stemma sequence number
392	selectedStemmaID = data.stemmaid;
393	// Stash the answer in our SVG array
394	stemmata[selectedStemmaID] = data.stemmasvg;
395	// Display the new stemma
396	load_stemma( selectedStemmaID );
397	// Reenable the button and close the form
398	$(evt.target).button("enable");
399	$('#stemma-edit-dialog').dialog('close');
400	}, 'json' );
401	},
402	Cancel: function() {
403	$('#stemma-edit-dialog').dialog('close');
404	}
405	},
406	open: function(evt) {
407	$("#edit_stemma_status").empty();
408	var stemmaseq = $('#stemmaseq').val();
409	if( stemmaseq == 'n' ) {
410	// If we are creating a new stemma, populate the textarea with a
411	// bare digraph.
412	$(evt.target).dialog('option', 'title', 'Add a new stemma')
413	$('#dot_field').val( "digraph stemma {\n\n}" );
414	} else {
415	// If we are editing a stemma, grab its stemmadot and populate the
416	// textarea with that.
417	$(evt.target).dialog('option', 'title', 'Edit selected stemma')
418	$('#dot_field').val( 'Loading, please wait...' );
419	var doturl = _get_url([ "stemmadot", selectedTextID, stemmaseq ]);
420	$.getJSON( doturl, function (data) {
421	// Re-insert the line breaks
422	var dotstring = data.dot.replace(/\\|n/gm, "\n");
423	$('#dot_field').val( dotstring );
424	});
425	}
426	},
427	}).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
428	$(event.target).parent().find('.ui-button').button("enable");
429	if( ajaxSettings.url.indexOf( 'stemma' ) > -1
430	&& ajaxSettings.type == 'POST' ) {
431	display_error( jqXHR, $("#edit_stemma_status") );
432	}
433	});
434
435	$('#upload-collation-dialog').dialog({
436	autoOpen: false,
e0b90236	437	height: 360,
3f9d7ae5	438	width: 480,
	439	modal: true,
	440	buttons: {
3f9d7ae5	441	upload: {
	442	text: 'Upload',
	443	id: 'upload_button',
	444	click: function() {
	445	$('#upload_status').empty();
e0b90236	446	$('#upload_button').button("disable");
e0b90236	447	upload_new();
3f9d7ae5	448	}
3f9d7ae5	449	},
ab0d1218	450	pick_file: {
	451	text: 'Pick File',
	452	id: 'pick_file_button',
	453	click: function() {
	454	$('#new_file').click();
	455	}
	456	},
3f9d7ae5	457	Cancel: function() {
	458	$('#upload-collation-dialog').dialog('close');
	459	}
	460	},
e0b90236	461	open: function() {
	462	// Set the upload button to its correct state based on
	463	// whether a file is loaded
	464	file_selected( $('#new_file').get(0) );
2ece58b3	465	$('#upload_status').empty();
3f9d7ae5	466	}
e0b90236	467	}).ajaxError( function(event, jqXHR, ajaxSettings, thrownError) {
	468	// Reset button state
	469	file_selected( $('#new_file').get(0) );
	470	// Display error message if applicable
	471	if( ajaxSettings.url.indexOf( 'newtradition' ) > -1
	472	&& ajaxSettings.type == 'POST' ) {
	473	display_error( jqXHR, $("#upload_status") );
	474	}
	475	});;
3f9d7ae5	476
	477	$('#stemma_graph').mousedown( function(evt) {
	478	evt.stopPropagation();
	479	$('#stemma_graph').data( 'mousedown_xy', [evt.clientX, evt.clientY] );
	480	$('body').mousemove( function(evt) {
	481	mouse_scale = 1; // for now, was: mouse_scale = svg_root_element.getScreenCTM().a;
	482	dx = (evt.clientX - $('#stemma_graph').data( 'mousedown_xy' )[0]) / mouse_scale;
	483	dy = (evt.clientY - $('#stemma_graph').data( 'mousedown_xy' )[1]) / mouse_scale;
	484	$('#stemma_graph').data( 'mousedown_xy', [evt.clientX, evt.clientY] );
	485	var svg_root = $('#stemma_graph svg').svg().svg('get').root();
	486	var g = $('g.graph', svg_root).get(0);
	487	current_translate = g.getAttribute( 'transform' ).split(/translate\(/)[1].split(')',1)[0].split(' ');
	488	new_transform = g.getAttribute( 'transform' ).replace( /translate\([^\)]*\)/, 'translate(' + (parseFloat(current_translate[0]) + dx) + ' ' + (parseFloat(current_translate[1]) + dy) + ')' );
	489	g.setAttribute( 'transform', new_transform );
	490	evt.returnValue = false;
	491	evt.preventDefault();
	492	return false;
	493	});
	494	$('body').mouseup( function(evt) {
	495	$('body').unbind('mousemove');
	496	$('body').unbind('mouseup');
	497	});
	498	});
	499
	500	$('#stemma_graph').mousewheel(function (event, delta) {
	501	event.returnValue = false;
	502	event.preventDefault();
	503	if (!delta \|\| delta == null \|\| delta == 0) delta = event.originalEvent.wheelDelta;
	504	if (!delta \|\| delta == null \|\| delta == 0) delta = -1 * event.originalEvent.detail;
	505	if( delta < -9 ) { delta = -9 };
	506	var z = 1 + delta/10;
	507	z = delta > 0 ? 1 : -1;
	508	var svg_root = $('#stemma_graph svg').svg().svg('get').root();
	509	var g = $('g.graph', svg_root).get(0);
	510	if (g && ((z<1 && (g.getScreenCTM().a * start_element_height) > 4.0) \|\| (z>=1 && (g.getScreenCTM().a * start_element_height) < 1000))) {
	511	var scaleLevel = z/10;
	512	current_scale = parseFloat( g.getAttribute( 'transform' ).split(/scale\(/)[1].split(')',1)[0].split(' ')[0] );
	513	new_transform = g.getAttribute( 'transform' ).replace( /scale\([^\)]*\)/, 'scale(' + (current_scale + scaleLevel) + ')' );
	514	g.setAttribute( 'transform', new_transform );
	515	}
	516	});
	517
	518	});