added support for .palettename.txt

src/components/Map.astro

@@ -18,7 +18,7 @@ import { getInterpolateBand1AsColor } from '../scripts/palette.js';
 import { transformExtent, Projection, get as getProjection, fromLonLat } from 'ol/proj';
 import {register,fromEPSGCode} from 'ol/proj/proj4';
 import proj4 from 'proj4'
-import {getQGISColorfile} from '../scripts/parseQGISColorfile.js';
+import {getQGISColorfile, getPalettenameFile} from '../scripts/parseQGISColorfile.js';
 
 
 let source : any = null;
@@ -117,6 +117,11 @@ async function buildMapForGeotiff() {
     }
   });
 
+  // Launch an async function to try and get a .palettename.txt for this URL  
+  // This will trigger a "newpalette" event if found
+  getPalettenameFile();
+
+
   // Launch an async function to try and get a QGIS colorfile for the palette
   // This will trigger a "newpalette" event if a QGIS colorfile is found
   getQGISColorfile();

src/scripts/parseQGISColorfile.js

@@ -45,6 +45,27 @@ export async function getQGISColorfile(){
     }
 }
 
+
+/**
+ * Try and get the .palettename.txt file for the URL
+ * This will trigger a "newpalette" event if found
+ * @returns 
+ */
+export async function getPalettenameFile(){
+    const url = localStorage.getItem('url');
+    if (!url) return null;
+    try {
+        const palettenameurl = url.replace('.tif', '.palettename.txt');
+        const response = await fetch(palettenameurl);
+        if (!response.ok) return null;
+        const text = await response.text();
+        localStorage.setItem('palettename', text);
+        document.dispatchEvent(new Event('newpalette'));
+    } catch (e) {
+    }
+}
+
+
 /**
  * Returns a function which accepts a value in the domain
  * of the QGISColorfile and returns a color.