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made permalink control more configurable by adding an argParserClass property and separating the logic for generating the key-value pairs from the div and link generation. Original patch by tcoulter. r=euzuro,me (closes #1489)

Browse Source 
git-svn-id: http://svn.openlayers.org/trunk/openlayers@7881 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
This commit is contained in:
ahocevar
2008-08-27 19:33:49 +00:00
parent 2a521ffcb2
commit 59826983c6
2 changed files with 100 additions and 38 deletions
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112
lib/OpenLayers/Control/Permalink.js
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@@ -15,6 +15,13 @@
* - <OpenLayers.Control>
*/
OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
/**
* APIProperty: argParserClass
* {Class} The ArgParser control class (not instance) to use with this
* control.
*/
argParserClass: OpenLayers.Control.ArgParser,
/**
* Property: element
@@ -81,7 +88,7 @@ OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
//make sure we have an arg parser attached
for(var i=0, len=this.map.controls.length; i<len; i++) {
var control = this.map.controls[i];
if (control.CLASS_NAME == "OpenLayers.Control.ArgParser") {
if (control.CLASS_NAME == this.argParserClass.CLASS_NAME) {
// If a permalink is added to the map, and an ArgParser already
// exists, we override the displayProjection to be the one
@@ -94,7 +101,7 @@ OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
}
}
if (i == this.map.controls.length) {
this.map.addControl(new OpenLayers.Control.ArgParser(
this.map.addControl(new this.argParserClass(
{ 'displayProjection': this.displayProjection }));
}
@@ -110,6 +117,7 @@ OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
OpenLayers.Control.prototype.draw.apply(this, arguments);
if (!this.element) {
this.div.className = this.displayClass;
this.element = document.createElement("a");
this.element.innerHTML = OpenLayers.i18n("permalink");
this.element.href="";
@@ -121,6 +129,11 @@ OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
'changebaselayer': this.updateLink,
scope: this
});
// Make it so there is at least a link even though the map may not have
// moved yet.
this.updateLink();
return this.div;
},
@@ -128,49 +141,72 @@ OpenLayers.Control.Permalink = OpenLayers.Class(OpenLayers.Control, {
* Method: updateLink
*/
updateLink: function() {
var center = this.map.getCenter();
// Map not initialized yet. Break out of this function.
if (!center) {
return;
}
var params = OpenLayers.Util.getParameters(this.base);
params.zoom = this.map.getZoom();
var lat = center.lat;
var lon = center.lon;
if (this.displayProjection) {
var mapPosition = OpenLayers.Projection.transform(
{ x: lon, y: lat },
this.map.getProjectionObject(),
this.displayProjection );
lon = mapPosition.x;
lat = mapPosition.y;
}
params.lat = Math.round(lat*100000)/100000;
params.lon = Math.round(lon*100000)/100000;
params.layers = '';
for (var i=0, len=this.map.layers.length; i<len; i++) {
var layer = this.map.layers[i];
if (layer.isBaseLayer) {
params.layers += (layer == this.map.baseLayer) ? "B" : "0";
} else {
params.layers += (layer.getVisibility()) ? "T" : "F";
}
}
var href = this.base;
if (href.indexOf('?') != -1) {
href = href.substring( 0, href.indexOf('?') );
}
href += '?' + OpenLayers.Util.getParameterString(params);
href += '?' + OpenLayers.Util.getParameterString(this.createParams());
this.element.href = href;
},
/**
* APIMethod: createParams
* Creates the parameters that need to be encoded into the permalink url.
*
* Parameters:
* center - {<OpenLayers.LonLat>} center to encode in the permalink.
* Defaults to the current map center.
* zoom - {Integer} zoom level to encode in the permalink. Defaults to the
* current map zoom level.
* layers - {Array(<OpenLayers.Layer>)} layers to encode in the permalink.
* Defaults to the current map layers.
*
* Returns:
* {Object} Hash of parameters that will be url-encoded into the
* permalink.
*/
createParams: function(center, zoom, layers) {
center = center || this.map.getCenter();
zoom = zoom || this.map.getZoom();
layers = layers || this.map.layers;
var params = OpenLayers.Util.getParameters(this.base);
// If there's still no center, map is not initialized yet.
// Break out of this function, and simply return the params from the
// base link.
if (center) {
params.zoom = this.map.getZoom();
var lat = center.lat;
var lon = center.lon;
if (this.displayProjection) {
var mapPosition = OpenLayers.Projection.transform(
{ x: lon, y: lat },
this.map.getProjectionObject(),
this.displayProjection );
lon = mapPosition.x;
lat = mapPosition.y;
}
params.lat = Math.round(lat*100000)/100000;
params.lon = Math.round(lon*100000)/100000;
params.layers = '';
for (var i=0, len=this.map.layers.length; i<len; i++) {
var layer = this.map.layers[i];
if (layer.isBaseLayer) {
params.layers += (layer == this.map.baseLayer) ? "B" : "0";
} else {
params.layers += (layer.getVisibility()) ? "T" : "F";
}
}
}
return params;
},
CLASS_NAME: "OpenLayers.Control.Permalink"
});