1 files changed, 252 insertions, 0 deletions
diff --git a/browser/components/shell/content/setDesktopBackground.js b/browser/components/shell/content/setDesktopBackground.js
new file mode 100644
index 0000000000..be6b108432
--- /dev/null
+++ b/browser/components/shell/content/setDesktopBackground.js
@@ -0,0 +1,252 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+/* import-globals-from /browser/base/content/utilityOverlay.js */
+
+var gSetBackground = {
+  _position: AppConstants.platform == "macosx" ? "STRETCH" : "",
+  _backgroundColor: AppConstants.platform != "macosx" ? 0 : undefined,
+  _screenWidth: 0,
+  _screenHeight: 0,
+  _image: null,
+  _canvas: null,
+  _imageName: null,
+
+  get _shell() {
+    return Cc["@mozilla.org/browser/shell-service;1"].getService(
+      Ci.nsIShellService
+    );
+  },
+
+  load() {
+    this._canvas = document.getElementById("screen");
+    this._screenWidth = screen.width;
+    this._screenHeight = screen.height;
+    // Cap ratio to 4 so the dialog width doesn't get ridiculous. Highest
+    // regular screens seem to be 32:9 (3.56) according to Wikipedia.
+    let screenRatio = Math.min(this._screenWidth / this._screenHeight, 4);
+    this._canvas.width = this._canvas.height * screenRatio;
+    document.getElementById("preview-unavailable").style.width =
+      this._canvas.width + "px";
+
+    if (AppConstants.platform == "macosx") {
+      document
+        .getElementById("SetDesktopBackgroundDialog")
+        .getButton("accept").hidden = true;
+    } else {
+      let multiMonitors = false;
+      if (AppConstants.platform == "linux") {
+        // getMonitors only ever returns the primary monitor on Linux, so just
+        // always show the option
+        multiMonitors = true;
+      } else {
+        const gfxInfo = Cc["@mozilla.org/gfx/info;1"].getService(Ci.nsIGfxInfo);
+        const monitors = gfxInfo.getMonitors();
+        multiMonitors = monitors.length > 1;
+      }
+
+      if (
+        !multiMonitors ||
+        AppConstants.isPlatformAndVersionAtMost("win", 6.1)
+      ) {
+        // Hide span option if < Win8 since that's when it was introduced.
+        document.getElementById("spanPosition").hidden = true;
+      }
+    }
+
+    document.addEventListener("dialogaccept", function () {
+      gSetBackground.setDesktopBackground();
+    });
+    // make sure that the correct dimensions will be used
+    setTimeout(
+      function (self) {
+        self.init(window.arguments[0], window.arguments[1]);
+      },
+      0,
+      this
+    );
+  },
+
+  init(aImage, aImageName) {
+    this._image = aImage;
+    this._imageName = aImageName;
+
+    // set the size of the coordinate space
+    this._canvas.width = this._canvas.clientWidth;
+    this._canvas.height = this._canvas.clientHeight;
+
+    var ctx = this._canvas.getContext("2d");
+    ctx.scale(
+      this._canvas.clientWidth / this._screenWidth,
+      this._canvas.clientHeight / this._screenHeight
+    );
+
+    if (AppConstants.platform != "macosx") {
+      this._initColor();
+    } else {
+      // Make sure to reset the button state in case the user has already
+      // set an image as their desktop background.
+      var setDesktopBackground = document.getElementById(
+        "setDesktopBackground"
+      );
+      setDesktopBackground.hidden = false;
+      var bundle = document.getElementById("backgroundBundle");
+      setDesktopBackground.label = bundle.getString("DesktopBackgroundSet");
+      setDesktopBackground.disabled = false;
+
+      document.getElementById("showDesktopPreferences").hidden = true;
+    }
+    this.updatePosition();
+  },
+
+  setDesktopBackground() {
+    if (AppConstants.platform != "macosx") {
+      Services.xulStore.persist(
+        document.getElementById("menuPosition"),
+        "value"
+      );
+      this._shell.desktopBackgroundColor = this._hexStringToLong(
+        this._backgroundColor
+      );
+    } else {
+      Services.obs.addObserver(this, "shell:desktop-background-changed");
+
+      var bundle = document.getElementById("backgroundBundle");
+      var setDesktopBackground = document.getElementById(
+        "setDesktopBackground"
+      );
+      setDesktopBackground.disabled = true;
+      setDesktopBackground.label = bundle.getString(
+        "DesktopBackgroundDownloading"
+      );
+    }
+    this._shell.setDesktopBackground(
+      this._image,
+      Ci.nsIShellService["BACKGROUND_" + this._position],
+      this._imageName
+    );
+  },
+
+  updatePosition() {
+    var ctx = this._canvas.getContext("2d");
+    ctx.clearRect(0, 0, this._screenWidth, this._screenHeight);
+    document.getElementById("preview-unavailable").hidden = true;
+
+    if (AppConstants.platform != "macosx") {
+      this._position = document.getElementById("menuPosition").value;
+    }
+
+    switch (this._position) {
+      case "TILE":
+        ctx.save();
+        ctx.fillStyle = ctx.createPattern(this._image, "repeat");
+        ctx.fillRect(0, 0, this._screenWidth, this._screenHeight);
+        ctx.restore();
+        break;
+      case "STRETCH":
+        ctx.drawImage(this._image, 0, 0, this._screenWidth, this._screenHeight);
+        break;
+      case "CENTER": {
+        let x = (this._screenWidth - this._image.naturalWidth) / 2;
+        let y = (this._screenHeight - this._image.naturalHeight) / 2;
+        ctx.drawImage(this._image, x, y);
+        break;
+      }
+      case "FILL": {
+        // Try maxing width first, overflow height.
+        let widthRatio = this._screenWidth / this._image.naturalWidth;
+        let width = this._image.naturalWidth * widthRatio;
+        let height = this._image.naturalHeight * widthRatio;
+        if (height < this._screenHeight) {
+          // Height less than screen, max height and overflow width.
+          let heightRatio = this._screenHeight / this._image.naturalHeight;
+          width = this._image.naturalWidth * heightRatio;
+          height = this._image.naturalHeight * heightRatio;
+        }
+        let x = (this._screenWidth - width) / 2;
+        let y = (this._screenHeight - height) / 2;
+        ctx.drawImage(this._image, x, y, width, height);
+        break;
+      }
+      case "FIT": {
+        // Try maxing width first, top and bottom borders.
+        let widthRatio = this._screenWidth / this._image.naturalWidth;
+        let width = this._image.naturalWidth * widthRatio;
+        let height = this._image.naturalHeight * widthRatio;
+        let x = 0;
+        let y = (this._screenHeight - height) / 2;
+        if (height > this._screenHeight) {
+          // Height overflow, maximise height, side borders.
+          let heightRatio = this._screenHeight / this._image.naturalHeight;
+          width = this._image.naturalWidth * heightRatio;
+          height = this._image.naturalHeight * heightRatio;
+          x = (this._screenWidth - width) / 2;
+          y = 0;
+        }
+        ctx.drawImage(this._image, x, y, width, height);
+        break;
+      }
+      case "SPAN": {
+        document.getElementById("preview-unavailable").hidden = false;
+        ctx.fillStyle = "#222";
+        ctx.fillRect(0, 0, this._screenWidth, this._screenHeight);
+        ctx.stroke();
+      }
+    }
+  },
+};
+
+if (AppConstants.platform != "macosx") {
+  gSetBackground._initColor = function () {
+    var color = this._shell.desktopBackgroundColor;
+
+    const rMask = 4294901760;
+    const gMask = 65280;
+    const bMask = 255;
+    var r = (color & rMask) >> 16;
+    var g = (color & gMask) >> 8;
+    var b = color & bMask;
+    this.updateColor(this._rgbToHex(r, g, b));
+
+    var colorpicker = document.getElementById("desktopColor");
+    colorpicker.value = this._backgroundColor;
+  };
+
+  gSetBackground.updateColor = function (aColor) {
+    this._backgroundColor = aColor;
+    this._canvas.style.backgroundColor = aColor;
+  };
+
+  // Converts a color string in the format "#RRGGBB" to an integer.
+  gSetBackground._hexStringToLong = function (aString) {
+    return (
+      (parseInt(aString.substring(1, 3), 16) << 16) |
+      (parseInt(aString.substring(3, 5), 16) << 8) |
+      parseInt(aString.substring(5, 7), 16)
+    );
+  };
+
+  gSetBackground._rgbToHex = function (aR, aG, aB) {
+    return (
+      "#" +
+      [aR, aG, aB]
+        .map(aInt => aInt.toString(16).replace(/^(.)$/, "0$1"))
+        .join("")
+        .toUpperCase()
+    );
+  };
+} else {
+  gSetBackground.observe = function (aSubject, aTopic, aData) {
+    if (aTopic == "shell:desktop-background-changed") {
+      document.getElementById("setDesktopBackground").hidden = true;
+      document.getElementById("showDesktopPreferences").hidden = false;
+
+      Services.obs.removeObserver(this, "shell:desktop-background-changed");
+    }
+  };
+
+  gSetBackground.showDesktopPrefs = function () {
+    this._shell.QueryInterface(Ci.nsIMacShellService).showDesktopPreferences();
+  };
+}