X-Git-Url: https://git-public.kairo.at/?p=mandelbrot.git;a=blobdiff_plain;f=xulapp%2Fchrome%2Fmandelbrot%2Fcontent%2Fmandelbrot.js;h=788e198bd6059fba5259f21dce6bb6ab2b8b1a06;hp=7762362591c4664798a8f9344df9865b91d59fae;hb=305865993932a42afc891deb5acc046b62949c9e;hpb=6403d662069799da869e77b1a426a29ccbc85a44

diff --git a/xulapp/chrome/mandelbrot/content/mandelbrot.js b/xulapp/chrome/mandelbrot/content/mandelbrot.js
index 7762362..788e198 100644
--- a/xulapp/chrome/mandelbrot/content/mandelbrot.js
+++ b/xulapp/chrome/mandelbrot/content/mandelbrot.js
@@ -40,71 +40,174 @@ var gPref = Components.classes["@mozilla.org/preferences-service;1"]
                       .getService(Components.interfaces.nsIPrefService)
                       .getBranch(null);
 var gStartTime = 0;
+var gMbrotBundle;
+var gCurrentImageData;
 
 function Startup() {
   updateIterMenu();
   updatePaletteMenu();
-  document.getElementById("statusLabel").value =
-      document.getElementById("mbrotBundle").getString("statusEmpty");
+  gMbrotBundle = document.getElementById("mbrotBundle");
+  document.getElementById("statusLabel").value = gMbrotBundle.getString("statusEmpty");
+}
+
+function adjustCoordsAndDraw(aC_min, aC_max) {
+  let iWidth = 0;
+  try {
+    iWidth = gPref.getIntPref("mandelbrot.image.width");
+  }
+  catch (e) { }
+  if ((iWidth < 10) || (iWidth > 5000)) {
+    iWidth = 300;
+    gPref.setIntPref("mandelbrot.image.width", iWidth);
+  }
+  let iHeight = 0;
+  try {
+    iHeight = gPref.getIntPref("mandelbrot.image.height");
+  }
+  catch (e) { }
+  if ((iHeight < 10) || (iHeight > 5000)) {
+    iHeight = 300;
+    gPref.setIntPref("mandelbrot.image.height", iHeight);
+  }
+
+  // correct coordinates
+  if (aC_min.r < -2)
+    aC_min.r = -2;
+  if (aC_max.r > 2)
+    aC_max.r = 2;
+  if ((aC_min.r > 2) || (aC_max.r < -2) || (aC_min.r >= aC_max.r)) {
+    aC_min.r = -2.0; aC_max.r = 1.0;
+  }
+  if (aC_min.i < -2)
+    aC_min.i = -2;
+  if (aC_max.i > 2)
+    aC_max.i = 2;
+  if ((aC_min.i > 2) || (aC_max.i < -2) || (aC_min.i >= aC_max.i)) {
+    aC_min.i = -1.3; aC_max.i = 1.3;
+  }
+
+  let CWidth = aC_max.r - aC_min.r;
+  let CHeight = aC_max.i - aC_min.i;
+  let C_mid = new complex(aC_min.r + CWidth / 2, aC_min.i + CHeight / 2);
+
+  let CRatio = Math.max(CWidth / iWidth, CHeight / iHeight);
+
+  gPref.setCharPref("mandelbrot.last_image.Cr_min", C_mid.r - iWidth * CRatio / 2);
+  gPref.setCharPref("mandelbrot.last_image.Cr_max", C_mid.r + iWidth * CRatio / 2);
+  gPref.setCharPref("mandelbrot.last_image.Ci_min", C_mid.i - iHeight * CRatio / 2);
+  gPref.setCharPref("mandelbrot.last_image.Ci_max", C_mid.i + iHeight * CRatio / 2);
+
+  drawImage();
 }
 
 function drawImage() {
   let canvas = document.getElementById("mbrotImage");
   let context = canvas.getContext("2d");
 
-  document.getElementById("statusLabel").value =
-      document.getElementById("mbrotBundle").getString("statusDrawing");
+  document.getElementById("drawButton").hidden = true;
+
+  document.getElementById("statusLabel").value = gMbrotBundle.getString("statusDrawing");
+
+  let Cr_min = -2.0;
+  let Cr_max = 1.0;
+  try {
+    Cr_min = parseFloat(gPref.getCharPref("mandelbrot.last_image.Cr_min"));
+    Cr_max = parseFloat(gPref.getCharPref("mandelbrot.last_image.Cr_max"));
+  }
+  catch (e) { }
+  if ((Cr_min < -3) || (Cr_min > 2) ||
+      (Cr_max < -3) || (Cr_max > 2) || (Cr_min >= Cr_max)) {
+    Cr_min = -2.0; Cr_max = 1.0;
+  }
+  gPref.setCharPref("mandelbrot.last_image.Cr_min", Cr_min);
+  gPref.setCharPref("mandelbrot.last_image.Cr_max", Cr_max);
+
+  let Ci_min = -1.5;
+  let Ci_max = 1.5;
+  try {
+    Ci_min = parseFloat(gPref.getCharPref("mandelbrot.last_image.Ci_min"));
+    Ci_max = parseFloat(gPref.getCharPref("mandelbrot.last_image.Ci_max"));
+  }
+  catch (e) { }
+  if ((Ci_min < -2.5) || (Ci_min > 2.5) ||
+      (Ci_max < -2.5) || (Ci_max > 2.5) || (Ci_min >= Ci_max)) {
+    Ci_min = -1.5; Ci_max = 1.5;
+  }
+  gPref.setCharPref("mandelbrot.last_image.Ci_min", Ci_min);
+  gPref.setCharPref("mandelbrot.last_image.Ci_max", Ci_max);
 
   let iterMax = gPref.getIntPref("mandelbrot.iteration_max");
   let algorithm = gPref.getCharPref("mandelbrot.use_algorithm");
 
-  context.fillStyle = "rgb(255, 255, 255)";
+  let iWidth = 0;
+  try {
+    iWidth = gPref.getIntPref("mandelbrot.image.width");
+  }
+  catch (e) { }
+  if ((iWidth < 10) || (iWidth > 5000)) {
+    iWidth = 300;
+    gPref.setIntPref("mandelbrot.image.width", iWidth);
+  }
+  let iHeight = 0;
+  try {
+    iHeight = gPref.getIntPref("mandelbrot.image.height");
+  }
+  catch (e) { }
+  if ((iHeight < 10) || (iHeight > 5000)) {
+    iHeight = 300;
+    gPref.setIntPref("mandelbrot.image.height", iHeight);
+  }
+
+  gCurrentImageData = {
+    C_min: new complex(Cr_min, Ci_min),
+    C_max: new complex(Cr_max, Ci_max),
+    iWidth: iWidth,
+    iHeight: iHeight,
+    iterMax: iterMax
+  };
+
+  canvas.width = iWidth;
+  canvas.height = iHeight;
+
+  context.fillStyle = "rgba(255, 255, 255, 127)";
   context.fillRect(0, 0, canvas.width, canvas.height);
 
   gStartTime = new Date();
 
-  drawLine(0, canvas, context, iterMax, algorithm);
+  drawLine(0, [Cr_min, Cr_max, Ci_min, Ci_max],
+              canvas, context, iterMax, algorithm);
 }
 
-function drawLine(line, canvas, context, iterMax, algorithm) {
-    let Cr_min = -2.0;
-    let Cr_max = 1.0;
-    try {
-      Cr_min = gPref.getCharPref("mandelbrot.last_image.Cr_min");
-      Cr_max = gPref.getCharPref("mandelbrot.last_image.Cr_max");
+function drawLine(line, dimensions, canvas, context, iterMax, algorithm) {
+  let Cr_min = dimensions[0];
+  let Cr_max = dimensions[1];
+  let Cr_scale = Cr_max - Cr_min;
+
+  let Ci_min = dimensions[2];
+  let Ci_max = dimensions[3];
+  let Ci_scale = Ci_max - Ci_min;
+
+  let pixels = [];
+  for (var img_y = line; img_y < canvas.height && img_y < line+8; img_y++)
+    for (let img_x = 0; img_x < canvas.width; img_x++) {
+      let C = new complex(Cr_min + (img_x / canvas.width) * Cr_scale,
+                          Ci_min + (img_y / canvas.height) * Ci_scale);
+      pixels.push.apply(pixels, drawPoint(context, img_x, img_y, C, iterMax, algorithm));
     }
-    catch (e) { }
-    let Cr_scale = Cr_max - Cr_min;
+  context.putImageData({width: canvas.width, height: pixels.length/4/canvas.width, data: pixels}, 0, line);
 
-    let Ci_min = -1.5;
-    let Ci_max = 1.5;
-    try {
-      Cr_min = gPref.getCharPref("mandelbrot.last_image.Ci_min");
-      Cr_max = gPref.getCharPref("mandelbrot.last_image.Ci_max");
-    }
-    catch (e) { }
-    let Ci_scale = Ci_max - Ci_min;
-
-    let pixels = [];
-    for (var img_y = line; img_y < canvas.height && img_y < line+8; img_y++)
-      for (let img_x = 0; img_x < canvas.width; img_x++) {
-        let C = new complex(Cr_min + (img_x / canvas.width) * Cr_scale,
-                            Ci_min + (img_y / canvas.height) * Ci_scale);
-        pixels.push.apply(pixels, drawPoint(context, img_x, img_y, C, iterMax, algorithm));
-      }
-    context.putImageData({width: canvas.width, height: pixels.length/4/canvas.width, data: pixels}, 0, line);
-
-    if (img_y < canvas.height)
-      setTimeout(drawLine, 0, img_y, canvas, context, iterMax, algorithm);
-    else
-      EndCalc();
+  if (img_y < canvas.height)
+    setTimeout(drawLine, 0, img_y, dimensions, canvas, context, iterMax, algorithm);
+  else if (gStartTime)
+    EndCalc();
 }
 
 function EndCalc() {
   let endTime = new Date();
   let timeUsed = (endTime.getTime() - gStartTime.getTime()) / 1000;
   document.getElementById("statusLabel").value =
-      document.getElementById("mbrotBundle").getFormattedString("statusTime", [timeUsed.toFixed(3)]);
+      gMbrotBundle.getFormattedString("statusTime", [timeUsed.toFixed(3)]);
+  gStartTime = 0;
 }
 
 function complex(aReal, aImag) {
@@ -214,10 +317,62 @@ function getColorPalette(palName) {
       }
       palette[1024] = [0, 0, 0, 255];
       break;
+    case 'rainbow-squared1':
+      for (let i = 0; i < 34; i++) {
+        let cc = Math.floor(i * 255 / 33);
+        palette[i] = [cc, 0, 0, 255];
+      }
+      for (let i = 0; i < 137; i++) {
+        let cc = Math.floor(i * 255 / 136);
+        palette[34 + i] = [255, cc, 0, 255];
+      }
+      for (let i = 0; i < 307; i++) {
+        let cc = Math.floor(i * 255 / 306);
+        palette[171 + i] = [255 - cc, 255, cc, 255];
+      }
+      for (let i = 0; i < 546; i++) {
+        let cc = Math.floor(i * 255 / 545);
+        palette[478 + i] = [cc, 255 - cc, 255, 255];
+      }
+      palette[1024] = [0, 0, 0, 255];
+      break;
+    case 'rainbow-linear2':
+      for (let i = 0; i < 205; i++) {
+        let cc = Math.floor(i * 255 / 204);
+        palette[i] = [255, cc, 0, 255];
+        palette[204 + i] = [255 - cc, 255, 0, 255];
+        palette[409 + i] = [0, 255, cc, 255];
+        palette[614 + i] = [0, 255 - cc, 255, 255];
+        palette[819 + i] = [cc, 0, 255, 255];
+      }
+      palette[1024] = [0, 0, 0, 255];
+      break;
+    case 'rainbow-squared2':
+      for (let i = 0; i < 19; i++) {
+        let cc = Math.floor(i * 255 / 18);
+        palette[i] = [255, cc, 0, 255];
+      }
+      for (let i = 0; i < 74; i++) {
+        let cc = Math.floor(i * 255 / 73);
+        palette[19 + i] = [255 - cc, 255, 0, 255];
+      }
+      for (let i = 0; i < 168; i++) {
+        let cc = Math.floor(i * 255 / 167);
+        palette[93 + i] = [0, 255, cc, 255];
+      }
+      for (let i = 0; i < 298; i++) {
+        let cc = Math.floor(i * 255 / 297);
+        palette[261 + i] = [0, 255 - cc, 255, 255];
+      }
+      for (let i = 0; i < 465; i++) {
+        let cc = Math.floor(i * 255 / 464);
+        palette[559 + i] = [cc, 0, 255, 255];
+      }
+      palette[1024] = [0, 0, 0, 255];
+      break;
   }
-/*
-Select Case palnr
-Case 1  'Standard-Palette (QB-Colors)
+  /*
+     'Standard-Palette (QB-Colors)
      For i = 0 To 1024
          xx = CInt(i * 500 / 1024 + 2)
          If xx <= 15 Then clr = xx
@@ -225,54 +380,7 @@ Case 1  'Standard-Palette (QB-Colors)
          If xx >= 500 Then clr = 0
          palette(i) = QBColor(clr)
      Next
-Case 3  'Regenbogen-Palette 1 (qu.)
-     For i = 0 To 33
-         clr = CInt(i * 255 / 33)
-         palette(i) = RGB(clr, 0, 0)
-     Next
-     For i = 0 To 136
-         clr = CInt(i * 255 / 136)
-         palette(34 + i) = RGB(255, clr, 0)
-     Next
-     For i = 0 To 306
-         clr = CInt(i * 255 / 306)
-         palette(171 + i) = RGB(255 - clr, 255, clr)
-     Next
-     For i = 0 To 545
-         clr = CInt(i * 255 / 545)
-         palette(478 + i) = RGB(clr, 255 - clr, 255)
-     Next
-Case 4  'Regenbogen-Palette 2 (linear)
-     For i = 0 To 204
-         clr = CInt(i * 255 / 204)
-         palette(i) = RGB(255, clr, 0)
-         palette(204 + i) = RGB(255 - clr, 255, 0)
-         palette(409 + i) = RGB(0, 255, clr)
-         palette(614 + i) = RGB(0, 255 - clr, 255)
-         palette(819 + i) = RGB(clr, 0, 255)
-     Next
-Case 5  'Regenbogen-Palette 2 (qu.)
-     For i = 0 To 18
-         clr = CInt(i * 255 / 18)
-         palette(i) = RGB(255, clr, 0)
-     Next
-     For i = 0 To 73
-         clr = CInt(i * 255 / 73)
-         palette(20 + i) = RGB(255 - clr, 255, 0)
-     Next
-     For i = 0 To 167
-         clr = CInt(i * 255 / 167)
-         palette(93 + i) = RGB(0, 255, clr)
-     Next
-     For i = 0 To 297
-         clr = CInt(i * 255 / 297)
-         palette(261 + i) = RGB(0, 255 - clr, 255)
-     Next
-     For i = 0 To 464
-         clr = CInt(i * 255 / 464)
-         palette(559 + i) = RGB(clr, 0, 255)
-     Next
-*/
+  */
   return palette;
 }
 
@@ -292,40 +400,209 @@ function drawPoint(context, img_x, img_y, C, iterMax, algorithm) {
 
 /***** pure UI functions *****/
 
+var zoomstart;
+
+function mouseevent(etype, event) {
+  let canvas = document.getElementById("mbrotImage");
+  switch (etype) {
+    case 'down':
+      if (event.button == 0)
+        // left button - start dragzoom
+        zoomstart = {x: event.clientX - canvas.offsetLeft,
+                     y: event.clientY - canvas.offsetTop};
+      break;
+    case 'up':
+      if (event.button == 0 && zoomstart) {
+        let zoomend = {x: event.clientX - canvas.offsetLeft,
+                       y: event.clientY - canvas.offsetTop};
+
+        // make sure zoomend is bigger than zoomstart
+        if ((zoomend.x == zoomstart.x) || (zoomend.y == zoomstart.y)) {
+          // cannot zoom what has no area, discard it
+          zoomstart = undefined;
+          return;
+        }
+        if (zoomend.x < zoomstart.x)
+          [zoomend.x, zoomstart.x] = [zoomstart.x, zoomend.x];
+        if (zoomend.y < zoomstart.y)
+          [zoomend.y, zoomstart.y] = [zoomstart.y, zoomend.y];
+
+        let prompts = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
+                                .getService(Components.interfaces.nsIPromptService);
+        let ok = prompts.confirm(null, gMbrotBundle.getString("zoomConfirmTitle"),
+                                 gMbrotBundle.getString("zoomConfirmLabel"));
+        // ok is now true if OK was clicked, and false if cancel was clicked
+        if (ok) {
+          // determine new "coordinates"
+          let CWidth = gCurrentImageData.C_max.r - gCurrentImageData.C_min.r;
+          let CHeight = gCurrentImageData.C_max.i - gCurrentImageData.C_min.i;
+          let newC_min = new complex(
+              gCurrentImageData.C_min.r + zoomstart.x / gCurrentImageData.iWidth * CWidth,
+              gCurrentImageData.C_min.i + zoomstart.y / gCurrentImageData.iHeight * CHeight);
+          let newC_max = new complex(
+              gCurrentImageData.C_min.r + zoomend.x / gCurrentImageData.iWidth * CWidth,
+              gCurrentImageData.C_min.i + zoomend.y / gCurrentImageData.iHeight * CHeight);
+
+          adjustCoordsAndDraw(newC_min, newC_max);
+        }
+      }
+      zoomstart = undefined;
+    break;
+  }
+}
+
 function saveImage() {
-  const bundle = document.getElementById("mbrotBundle");
   const nsIFilePicker = Components.interfaces.nsIFilePicker;
-  var fp = null;
+  let fp = null;
   try {
     fp = Components.classes["@mozilla.org/filepicker;1"]
                    .createInstance(nsIFilePicker);
   } catch (e) {}
   if (!fp) return;
-  var promptString = bundle.getString("savePrompt");
+  let promptString = gMbrotBundle.getString("savePrompt");
   fp.init(window, promptString, nsIFilePicker.modeSave);
-  fp.appendFilter(bundle.getString("pngFilterName"), "*.png");
+  fp.appendFilter(gMbrotBundle.getString("pngFilterName"), "*.png");
   fp.defaultString = "mandelbrot.png";
 
-  var fpResult = fp.show();
+  let fpResult = fp.show();
   if (fpResult != nsIFilePicker.returnCancel) {
     saveCanvas(document.getElementById("mbrotImage"), fp.file);
   }
 }
 
+function updateBookmarkMenu(aParent) {
+  document.getElementById("bookmarkSave").disabled =
+    (!document.getElementById("drawButton").hidden || (gStartTime > 0));
+
+  while (aParent.hasChildNodes() &&
+         aParent.lastChild.id != "bookmarkSeparator")
+    aParent.removeChild(aParent.lastChild);
+
+  let file = Components.classes["@mozilla.org/file/directory_service;1"]
+                       .getService(Components.interfaces.nsIProperties)
+                       .get("ProfD", Components.interfaces.nsIFile);
+  file.append("mandelbookmarks.sqlite");
+  if (file.exists()) {
+    let connection = Components.classes["@mozilla.org/storage/service;1"]
+                               .getService(Components.interfaces.mozIStorageService)
+                               .openDatabase(file);
+    try {
+      if (connection.tableExists("bookmarks")) {
+        let statement = connection.createStatement(
+            "SELECT name,ROWID FROM bookmarks ORDER BY ROWID ASC");
+        while (statement.executeStep()) {
+          let newItem = aParent.appendChild(document.createElement("menuitem"));
+          newItem.setAttribute("label", statement.getString(0));
+          newItem.setAttribute("bmRowID", statement.getString(1));
+        }
+        statement.reset();
+        statement.finalize();
+        return;
+      }
+    } finally {
+      connection.close();
+    }
+  }
+  // Create the "Nothing Available" Menu item and disable it.
+  let na = aParent.appendChild(document.createElement("menuitem"));
+  na.setAttribute("label", gMbrotBundle.getString("noBookmarks"));
+  na.setAttribute("disabled", "true");
+}
+
+function callBookmark(evtarget) {
+  if (evtarget.id == "bookmarkSave" || evtarget.id == "bookmarkSeparator")
+    return;
+  if (evtarget.id == "bookmarkOverview") {
+    adjustCoordsAndDraw(new complex(0,0), new complex(0,0));
+    return;
+  }
+
+  if (evtarget.getAttribute('bmRowID')) {
+    let iterMax = 0;
+    let C_min = null;
+    let C_max = null;
+
+    let file = Components.classes["@mozilla.org/file/directory_service;1"]
+                         .getService(Components.interfaces.nsIProperties)
+                         .get("ProfD", Components.interfaces.nsIFile);
+    file.append("mandelbookmarks.sqlite");
+    let connection = Components.classes["@mozilla.org/storage/service;1"]
+                               .getService(Components.interfaces.mozIStorageService)
+                               .openDatabase(file);
+    let statement = connection.createStatement(
+        "SELECT iteration_max,Cr_min,Cr_max,Ci_min,Ci_max FROM bookmarks WHERE ROWID=?1");
+    statement.bindStringParameter(0, evtarget.getAttribute('bmRowID'));
+    while (statement.executeStep()) {
+      iterMax = statement.getInt32(0);
+      C_min = new complex(statement.getDouble(1), statement.getDouble(3));
+      C_max = new complex(statement.getDouble(2), statement.getDouble(4));
+    }
+    statement.finalize();
+    connection.close();
+
+    if (iterMax && C_min && C_max) {
+      gPref.setIntPref("mandelbrot.iteration_max", iterMax);
+      adjustCoordsAndDraw(C_min, C_max);
+    }
+  }
+}
+
+function saveBookmark() {
+  // retrieve wanted bookmark name with a prompt
+  let prompts = Components.classes["@mozilla.org/embedcomp/prompt-service;1"]
+                          .getService(Components.interfaces.nsIPromptService);
+  let input = {value: ""}; // empty default value
+  let ok = prompts.prompt(null, gMbrotBundle.getString("saveBookmarkTitle"), gMbrotBundle.getString("saveBookmarkLabel"), input, null, {});
+  // ok is true if OK is pressed, false if Cancel. input.value holds the value of the edit field if "OK" was pressed.
+  if (!ok || !input.value)
+    return
+
+  let bmName = input.value;
+
+  // Open or create the bookmarks database.
+  let file = Components.classes["@mozilla.org/file/directory_service;1"]
+                       .getService(Components.interfaces.nsIProperties)
+                       .get("ProfD", Components.interfaces.nsIFile);
+  file.append("mandelbookmarks.sqlite");
+  let connection = Components.classes["@mozilla.org/storage/service;1"]
+                             .getService(Components.interfaces.mozIStorageService)
+                             .openDatabase(file);
+  connection.beginTransaction();
+  if (!connection.tableExists("bookmarks"))
+    connection.createTable("bookmarks", "name TEXT, iteration_max INTEGER, Cr_min REAL, Cr_max REAL, Ci_min REAL, Ci_max REAL");
+  // NULL. The value is a NULL value.
+  // INTEGER. The value is a signed integer, stored in 1, 2, 3, 4, 6, or 8 bytes depending on the magnitude of the value.
+  // REAL. The value is a floating point value, stored as an 8-byte IEEE floating point number.
+  // TEXT. The value is a text string, stored using the database encoding (UTF-8, UTF-16BE or UTF-16-LE).
+
+  // Put value of the current image into the bookmarks table
+  let statement = connection.createStatement(
+      "INSERT INTO bookmarks (name,iteration_max,Cr_min,Cr_max,Ci_min,Ci_max) VALUES (?1,?2,?3,?4,?5,?6)");
+  statement.bindStringParameter(0, bmName);
+  statement.bindStringParameter(1, gCurrentImageData.iterMax);
+  statement.bindStringParameter(2, gCurrentImageData.C_min.r);
+  statement.bindStringParameter(3, gCurrentImageData.C_max.r);
+  statement.bindStringParameter(4, gCurrentImageData.C_min.i);
+  statement.bindStringParameter(5, gCurrentImageData.C_max.i);
+  statement.execute();
+  statement.finalize();
+  connection.commitTransaction();
+  connection.close();
+}
+
 function updateIterMenu() {
+  let currentIter = 0;
   try {
-    var currentIter = gPref.getIntPref("mandelbrot.iteration_max");
-  }
-  catch(e) {
-    var currentIter = 0;
+    currentIter = gPref.getIntPref("mandelbrot.iteration_max");
   }
+  catch(e) { }
   if (currentIter < 10) {
     currentIter = 500;
     setIter(currentIter);
   }
 
-  var popup = document.getElementById("menu_iterPopup");
-  var item = popup.firstChild;
+  let popup = document.getElementById("menu_iterPopup");
+  let item = popup.firstChild;
   while (item) {
     if (item.getAttribute("name") == "iter") {
       if (item.getAttribute("value") == currentIter)
@@ -342,12 +619,11 @@ function setIter(aIter) {
 }
 
 function updatePaletteMenu() {
+  let currentPalette = '';
   try {
-    var currentPalette = gPref.getCharPref("mandelbrot.color_palette");
-  }
-  catch(e) {
-    var currentPalette = '';
+    currentPalette = gPref.getCharPref("mandelbrot.color_palette");
   }
+  catch(e) { }
   if (!currentPalette.length) {
     currentPalette = 'kairo';
     setPalette(currentPalette);
@@ -355,8 +631,8 @@ function updatePaletteMenu() {
   if (!gColorPalette || !gColorPalette.length)
     gColorPalette = getColorPalette(currentPalette);
 
-  var popup = document.getElementById("menu_palettePopup");
-  var item = popup.firstChild;
+  let popup = document.getElementById("menu_palettePopup");
+  let item = popup.firstChild;
   while (item) {
     if (item.getAttribute("name") == "palette") {
       if (item.getAttribute("value") == currentPalette)
@@ -389,19 +665,18 @@ function toggleJITState(jitMenuItem) {
 }
 
 function updateAlgoMenu() {
+  let currentAlgo = '';
   try {
-    var currentAlgo = gPref.getCharPref("mandelbrot.use_algorithm");
-  }
-  catch(e) {
-    var currentAlgo = '';
+    currentAlgo = gPref.getCharPref("mandelbrot.use_algorithm");
   }
+  catch(e) { }
   if (!currentAlgo.length) {
     currentAlgo = 'numeric';
     setAlgorithm(currentAlgo);
   }
 
-  var popup = document.getElementById("menu_algoPopup");
-  var item = popup.firstChild;
+  let popup = document.getElementById("menu_algoPopup");
+  let item = popup.firstChild;
   while (item) {
     if (item.getAttribute("name") == "algorithm") {
       if (item.getAttribute("value") == currentAlgo)
@@ -417,6 +692,29 @@ function setAlgorithm(algoID) {
   gPref.setCharPref("mandelbrot.use_algorithm", algoID);
 }
 
+function addonsManager(aPane) {
+  let theEM = Components.classes["@mozilla.org/appshell/window-mediator;1"]
+                        .getService(Components.interfaces.nsIWindowMediator)
+                        .getMostRecentWindow("Extension:Manager");
+  if (theEM) {
+    theEM.focus();
+    if (aPane)
+      theEM.showView(aPane);
+    return;
+  }
+
+  const EMURL = "chrome://mozapps/content/extensions/extensions.xul";
+  const EMFEATURES = "all,dialog=no";
+  if (aPane)
+    window.openDialog(EMURL, "", EMFEATURES, aPane);
+  else
+    window.openDialog(EMURL, "", EMFEATURES);
+}
+
+function errorConsole() {
+  toOpenWindowByType("global:console", "chrome://global/content/console.xul");
+}
+
 /***** helper functions from external sources *****/
 
 // function below is based on http://developer.mozilla.org/en/docs/Code_snippets:Canvas
@@ -452,3 +750,40 @@ function quitApp(aForceQuit) {
                                   Components.interfaces.nsIAppStartup.eAttemptQuit;
   appStartup.quit(quitSeverity);
 }
+
+// functions below are from comm-central/suite/common/tasksOverlay.js
+function toOpenWindow(aWindow) {
+  try {
+    // Try to focus the previously focused window e.g. message compose body
+    aWindow.document.commandDispatcher.focusedWindow.focus();
+  } catch (e) {
+    // e.g. full-page plugin or non-XUL document; just raise the top window
+    aWindow.focus();
+  }
+}
+
+function toOpenWindowByType(inType, uri, features) {
+  // don't do several loads in parallel
+  if (uri in window)
+    return;
+
+  var topWindow = Components.classes["@mozilla.org/appshell/window-mediator;1"]
+                            .getService(Components.interfaces.nsIWindowMediator)
+                            .getMostRecentWindow(inType);
+  if ( topWindow )
+    toOpenWindow( topWindow );
+  else {
+    // open the requested window, but block it until it's fully loaded
+    function newWindowLoaded(event) {
+      // make sure that this handler is called only once
+      window.removeEventListener("unload", newWindowLoaded, false);
+      window[uri].removeEventListener("load", newWindowLoaded, false);
+      delete window[uri];
+    }
+    // remember the newly loading window until it's fully loaded
+    // or until the current window passes away
+    window[uri] = window.openDialog(uri, "", features || "all,dialog=no");
+    window[uri].addEventListener("load", newWindowLoaded, false);
+    window.addEventListener("unload", newWindowLoaded, false);
+  }
+}