cbeer · February 9, 2017 21:28
diff --git a/README.md b/README.md
diff --git a/app.js b/app.js
 var baseUrl = 'https://stacks.stanford.edu/image/iiif/hg676jb4964%2F0380_796-44';

 var aspectRatioPreservingRectangleEditor = function(aspect) {
  return L.Editable.RectangleEditor.extend({
    extendBounds: function (e) {
      var index = e.vertex.getIndex(),
          next = e.vertex.getNext(),
          previous = e.vertex.getPrevious(),
          oppositeIndex = (index + 2) % 4,
          opposite = e.vertex.latlngs[oppositeIndex];

      if ((index % 2) == 1) {
        // calculate horiz. displacement
        e.latlng.update([opposite.lat + ((1 / aspect) * (opposite.lng - e.latlng.lng)), e.latlng.lng]);
      } else {
        // calculate vert. displacement
        e.latlng.update([e.latlng.lat, (opposite.lng - (aspect * (opposite.lat - e.latlng.lat)))]);
      }
      var bounds = new L.LatLngBounds(e.latlng, opposite);
      // Update latlngs by hand to preserve order.
      previous.latlng.update([e.latlng.lat, opposite.lng]);
      next.latlng.update([opposite.lat, e.latlng.lng]);
      this.updateBounds(bounds);
      this.refreshVertexMarkers();
    }
  });
 };

 var map = L.map('map', {
  editable: true,
  center: [0, 0],
  crs: L.CRS.Simple,
  zoom: 0,
  editOptions: {
    rectangleEditorClass: aspectRatioPreservingRectangleEditor(10.0)
  }
 });


 var iiifLayer = L.tileLayer.iiif(baseUrl + '/info.json').addTo(map);
 var loaded = false;
 iiifLayer.on('load', function() {
  if(loaded) {
    return;
  }
  
  loaded = true;
  
  var b = [100, 100, 500, 50];

  var minPoint = L.point(parseInt(b[0]), parseInt(b[1]));
  var maxPoint = L.point(parseInt(b[0]) + parseInt(b[2]), parseInt(b[1]) + parseInt(b[3]));
  var maxZoom = iiifLayer.maxZoom;

  var min = map.unproject(minPoint, iiifLayer.maxZoom);
  var max = map.unproject(maxPoint, iiifLayer.maxZoom);
  var rec = L.rectangle([
    min, max
  ]);
  rec.addTo(map);

  rec.enableEdit();
  rec.on('dblclick', L.DomEvent.stop).on('dblclick', rec.toggleEdit);

  map.on('editable:dragend editable:vertex:dragend', function(e) {
    var bounds = e.layer.getBounds();
    var min = e.target.project(bounds.getNorthWest(), iiifLayer.maxZoom);
    var max = e.target.project(bounds.getSouthEast(), iiifLayer.maxZoom);
    var region = [Math.round(min.x), Math.round(min.y), Math.round(max.x - min.x), Math.round(max.y - min.y)]
    var url = baseUrl + '/' + region.join(',') + '/full/0/default.jpg';
    $('#urlArea').html(
      '<a href="' + url + '" target=_blank>' + url + '</a>'
    )
  });
 });
diff --git a/index.html b/index.html
 <!DOCTYPE html>
  <head>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
    <link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css" />
    <link rel="stylesheet" href="styles.css">
    <script src="https://unpkg.com/[email protected]/dist/leaflet.js"></script>
    <script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
    <script src="https://cdn.rawgit.com/mejackreed/Leaflet-IIIF/v1.0.1/leaflet-iiif.js"></script>
    <script src="https://npmcdn.com/leaflet.path.drag/src/Path.Drag.js"></script>
    <script src="http://leaflet.github.io/Leaflet.Editable/src/Leaflet.Editable.js"></script>
  </head>
  <body>
    <div id="map"></div>
    <div id="urlArea"></div>
    <script src="app.js"></script>
  </body>
 </html>
diff --git a/LICENSE.txt b/LICENSE.txt
 MIT License

 Copyright (c) 2016 Jack Reed

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
diff --git a/preview.jpg b/preview.jpg
diff --git a/styles.css b/styles.css
 html, body, #map{
  height: 100%;
  margin: 0;
 }

 .leaflet-areaselect-container {
  position:absolute;
  width:100%;
  height:100%;
 }

 #urlArea {
  background-color: rgba(255, 255, 255, 0.5);
  font-family: sans-serif;
  position: absolute;
  top: 0px;
  left: 50%;
  z-index: 100000;
 }
diff --git a/thumbnail.png b/thumbnail.png
	var baseUrl = 'https://stacks.stanford.edu/image/iiif/hg676jb4964%2F0380_796-44';

	var aspectRatioPreservingRectangleEditor = function(aspect) {
	return L.Editable.RectangleEditor.extend({
	extendBounds: function (e) {
	var index = e.vertex.getIndex(),
	next = e.vertex.getNext(),
	previous = e.vertex.getPrevious(),
	oppositeIndex = (index + 2) % 4,
	opposite = e.vertex.latlngs[oppositeIndex];

	if ((index % 2) == 1) {
	// calculate horiz. displacement
	e.latlng.update([opposite.lat + ((1 / aspect) * (opposite.lng - e.latlng.lng)), e.latlng.lng]);
	} else {
	// calculate vert. displacement
	e.latlng.update([e.latlng.lat, (opposite.lng - (aspect * (opposite.lat - e.latlng.lat)))]);
	}
	var bounds = new L.LatLngBounds(e.latlng, opposite);
	// Update latlngs by hand to preserve order.
	previous.latlng.update([e.latlng.lat, opposite.lng]);
	next.latlng.update([opposite.lat, e.latlng.lng]);
	this.updateBounds(bounds);
	this.refreshVertexMarkers();
	}
	});
	};

	var map = L.map('map', {
	editable: true,
	center: [0, 0],
	crs: L.CRS.Simple,
	zoom: 0,
	editOptions: {
	rectangleEditorClass: aspectRatioPreservingRectangleEditor(10.0)
	}
	});


	var iiifLayer = L.tileLayer.iiif(baseUrl + '/info.json').addTo(map);
	var loaded = false;
	iiifLayer.on('load', function() {
	if(loaded) {
	return;
	}

	loaded = true;

	var b = [100, 100, 500, 50];

	var minPoint = L.point(parseInt(b[0]), parseInt(b[1]));
	var maxPoint = L.point(parseInt(b[0]) + parseInt(b[2]), parseInt(b[1]) + parseInt(b[3]));
	var maxZoom = iiifLayer.maxZoom;

	var min = map.unproject(minPoint, iiifLayer.maxZoom);
	var max = map.unproject(maxPoint, iiifLayer.maxZoom);
	var rec = L.rectangle([
	min, max
	]);
	rec.addTo(map);

	rec.enableEdit();
	rec.on('dblclick', L.DomEvent.stop).on('dblclick', rec.toggleEdit);

	map.on('editable:dragend editable:vertex:dragend', function(e) {
	var bounds = e.layer.getBounds();
	var min = e.target.project(bounds.getNorthWest(), iiifLayer.maxZoom);
	var max = e.target.project(bounds.getSouthEast(), iiifLayer.maxZoom);
	var region = [Math.round(min.x), Math.round(min.y), Math.round(max.x - min.x), Math.round(max.y - min.y)]
	var url = baseUrl + '/' + region.join(',') + '/full/0/default.jpg';
	$('#urlArea').html(
	'<a href="' + url + '" target=_blank>' + url + '</a>'
	)
	});
	});
	<!DOCTYPE html>
	<head>
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
	<link rel="stylesheet" href="https://unpkg.com/[email protected]/dist/leaflet.css" />
	<link rel="stylesheet" href="styles.css">
	<script src="https://unpkg.com/[email protected]/dist/leaflet.js"></script>
	<script src="//ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
	<script src="https://cdn.rawgit.com/mejackreed/Leaflet-IIIF/v1.0.1/leaflet-iiif.js"></script>
	<script src="https://npmcdn.com/leaflet.path.drag/src/Path.Drag.js"></script>
	<script src="http://leaflet.github.io/Leaflet.Editable/src/Leaflet.Editable.js"></script>
	</head>
	<body>
	<div id="map"></div>
	<div id="urlArea"></div>
	<script src="app.js"></script>
	</body>
	</html>
	MIT License

	Copyright (c) 2016 Jack Reed

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all
	copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	SOFTWARE.
	html, body, #map{
	height: 100%;
	margin: 0;
	}

	.leaflet-areaselect-container {
	position:absolute;
	width:100%;
	height:100%;
	}

	#urlArea {
	background-color: rgba(255, 255, 255, 0.5);
	font-family: sans-serif;
	position: absolute;
	top: 0px;
	left: 50%;
	z-index: 100000;
	}