Merge pull request #9 from konsumer/feature-7

allow relative or blank projectRoot, for #7

README.md

@@ -70,9 +70,9 @@ If you prefer watching check the video in YouTube:
 
 [How to export from Tiled To Godot 3.2](https://youtu.be/4jSFAXIa_Lo)
 
-After you open a Tilemap or Tileset you need to add this custom property:
-`"projectRoot" : string` , then set the value to the root project folder of your Godot project.
-For example: `D:/work/GodotProjects/game_one/`
+### setting `res://`
+
+The exporter needs to know where `res://` is. By default, it's in the same directory where the Tiled files are being saved. You can override it with a tile/map custom property `projectRoot : string` that is either relative to the file you are exporting (starting with a `.`), or absolute (not recommended.)
 
 **_!!! Pay attention to the "/" instead of standard windows "\\".
 Single Backslash "\\" is used for escaping special symbols._**

export_to_godot_tilemap.js

@@ -6,11 +6,7 @@ class GodotTilemapExporter {
         this.map = map;
         this.fileName = fileName;
         // noinspection JSUnresolvedFunction
-        this.projectRoot = this.map.property("projectRoot");
-        if (!this.projectRoot) {
-            throw new Error("Missing mandatory custom property: projectRoot!");
-        }
-        this.projectRoot = this.projectRoot.replace('\\', '/');
+        this.projectRoot = getResPath(this.map.property("projectRoot"), fileName);
         this.tileOffset = 65536;
         this.tileMapsString = "";
         this.tilesetsString = "";

export_to_godot_tileset.js

@@ -6,11 +6,7 @@ class GodotTilesetExporter {
         this.tileset = tileset;
         this.fileName = fileName;
         // noinspection JSUnresolvedFunction
-        this.projectRoot = this.tileset.property("projectRoot");
-        if (!this.projectRoot) {
-            throw new Error("Missing mandatory custom property: projectRoot!");
-        }
-        this.projectRoot = this.projectRoot.replace('\\', '/');
+        this.projectRoot = getResPath(this.tileset.property("projectRoot"), fileName);
         this.spriteImagePath = this.tileset.image.replace(this.projectRoot, "");
         this.shapesResources = "";
         this.shapes = "";

utils.js

@@ -8,4 +8,25 @@ function logf(data){
 }
 function logk(data){
     console.log(Object.keys(data));
-}
+}
+
+function getResPath (projectRoot, outputPath) {
+  const p = outputPath.split('/').slice(0, -1)
+  // check for projectRoot
+  // If projectRoot is not set, set it to current file's location
+  if (!projectRoot) {
+    projectRoot = p.join('/')
+  }
+  projectRoot = projectRoot.replace(/\\/g, '/')
+  // Use it as absolute, if it doesn't start with ".", relative if it does
+  if (projectRoot[0] === '.') {
+    const out = p
+    projectRoot.split('/').forEach((segment, i) => {
+      if (segment === '..') {
+        out.pop()
+      }
+    })
+    projectRoot = out.join('/')
+  }
+  return projectRoot
+}