shithub: puzzles

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js: Bypass our own dialogue box when loading

By constructing the <input type=file> off screen and activating it from
JavaScript, we can jump straight to the browser's upload dialogue box
without interposing our own one.  This gives a smoother experience, and
also avoids the difficult-to-handle <input type=file> ever being
visible.

--- a/emccpre.js

+++ b/emccpre.js

@@ -391,13 +391,10 @@

     document.getElementById("load").onclick = function(event) {

         if (dlg_dimmer === null) {

-            dialog_init("Upload saved-game file");

             var input = document.createElement("input");

             input.type = "file";

             input.multiple = false;

-            dlg_form.appendChild(input);

-            dlg_form.appendChild(document.createElement("br"));

-            dialog_launch(function(event) {

+            input.addEventListener("change", function(event) {

                 if (input.files.length == 1) {

                     var file = input.files.item(0);

                     var reader = new FileReader();

@@ -407,10 +404,9 @@

                     });

                     reader.readAsText(file);

                 }

-                dialog_cleanup();

-            }, function(event) {

-                dialog_cleanup();

             });

+            input.click();

+            onscreen_canvas.focus();

         }

     };