1 files changed, 0 insertions, 222 deletions
diff --git a/components/newtab/dropPreview.js b/components/newtab/dropPreview.js
deleted file mode 100644
index fd7587a..0000000
--- a/components/newtab/dropPreview.js
+++ /dev/null
@@ -1,222 +0,0 @@
-#ifdef 0
-/* 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/. */
-#endif
-
-/**
- * This singleton provides the ability to re-arrange the current grid to
- * indicate the transformation that results from dropping a cell at a certain
- * position.
- */
-var gDropPreview = {
-  /**
-   * Rearranges the sites currently contained in the grid when a site would be
-   * dropped onto the given cell.
-   * @param aCell The drop target cell.
-   * @return The re-arranged array of sites.
-   */
-  rearrange: function DropPreview_rearrange(aCell) {
-    let sites = gGrid.sites;
-
-    // Insert the dragged site into the current grid.
-    this._insertDraggedSite(sites, aCell);
-
-    // After the new site has been inserted we need to correct the positions
-    // of all pinned tabs that have been moved around.
-    this._repositionPinnedSites(sites, aCell);
-
-    return sites;
-  },
-
-  /**
-   * Inserts the currently dragged site into the given array of sites.
-   * @param aSites The array of sites to insert into.
-   * @param aCell The drop target cell.
-   */
-  _insertDraggedSite: function DropPreview_insertDraggedSite(aSites, aCell) {
-    let dropIndex = aCell.index;
-    let draggedSite = gDrag.draggedSite;
-
-    // We're currently dragging a site.
-    if (draggedSite) {
-      let dragCell = draggedSite.cell;
-      let dragIndex = dragCell.index;
-
-      // Move the dragged site into its new position.
-      if (dragIndex != dropIndex) {
-        aSites.splice(dragIndex, 1);
-        aSites.splice(dropIndex, 0, draggedSite);
-      }
-    // We're handling an external drag item.
-    } else {
-      aSites.splice(dropIndex, 0, null);
-    }
-  },
-
-  /**
-   * Correct the position of all pinned sites that might have been moved to
-   * different positions after the dragged site has been inserted.
-   * @param aSites The array of sites containing the dragged site.
-   * @param aCell The drop target cell.
-   */
-  _repositionPinnedSites:
-    function DropPreview_repositionPinnedSites(aSites, aCell) {
-
-    // Collect all pinned sites.
-    let pinnedSites = this._filterPinnedSites(aSites, aCell);
-
-    // Correct pinned site positions.
-    pinnedSites.forEach(function (aSite) {
-      aSites[aSites.indexOf(aSite)] = aSites[aSite.cell.index];
-      aSites[aSite.cell.index] = aSite;
-    }, this);
-
-    // There might be a pinned cell that got pushed out of the grid, try to
-    // sneak it in by removing a lower-priority cell.
-    if (this._hasOverflowedPinnedSite(aSites, aCell))
-      this._repositionOverflowedPinnedSite(aSites, aCell);
-  },
-
-  /**
-   * Filter pinned sites out of the grid that are still on their old positions
-   * and have not moved.
-   * @param aSites The array of sites to filter.
-   * @param aCell The drop target cell.
-   * @return The filtered array of sites.
-   */
-  _filterPinnedSites: function DropPreview_filterPinnedSites(aSites, aCell) {
-    let draggedSite = gDrag.draggedSite;
-
-    // When dropping on a cell that contains a pinned site make sure that all
-    // pinned cells surrounding the drop target are moved as well.
-    let range = this._getPinnedRange(aCell);
-
-    return aSites.filter(function (aSite, aIndex) {
-      // The site must be valid, pinned and not the dragged site.
-      if (!aSite || aSite == draggedSite || !aSite.isPinned())
-        return false;
-
-      let index = aSite.cell.index;
-
-      // If it's not in the 'pinned range' it's a valid pinned site.
-      return (index > range.end || index < range.start);
-    });
-  },
-
-  /**
-   * Determines the range of pinned sites surrounding the drop target cell.
-   * @param aCell The drop target cell.
-   * @return The range of pinned cells.
-   */
-  _getPinnedRange: function DropPreview_getPinnedRange(aCell) {
-    let dropIndex = aCell.index;
-    let range = {start: dropIndex, end: dropIndex};
-
-    // We need a pinned range only when dropping on a pinned site.
-    if (aCell.containsPinnedSite()) {
-      let links = gPinnedLinks.links;
-
-      // Find all previous siblings of the drop target that are pinned as well.
-      while (range.start && links[range.start - 1])
-        range.start--;
-
-      let maxEnd = links.length - 1;
-
-      // Find all next siblings of the drop target that are pinned as well.
-      while (range.end < maxEnd && links[range.end + 1])
-        range.end++;
-    }
-
-    return range;
-  },
-
-  /**
-   * Checks if the given array of sites contains a pinned site that has
-   * been pushed out of the grid.
-   * @param aSites The array of sites to check.
-   * @param aCell The drop target cell.
-   * @return Whether there is an overflowed pinned cell.
-   */
-  _hasOverflowedPinnedSite:
-    function DropPreview_hasOverflowedPinnedSite(aSites, aCell) {
-
-    // If the drop target isn't pinned there's no way a pinned site has been
-    // pushed out of the grid so we can just exit here.
-    if (!aCell.containsPinnedSite())
-      return false;
-
-    let cells = gGrid.cells;
-
-    // No cells have been pushed out of the grid, nothing to do here.
-    if (aSites.length <= cells.length)
-      return false;
-
-    let overflowedSite = aSites[cells.length];
-
-    // Nothing to do if the site that got pushed out of the grid is not pinned.
-    return (overflowedSite && overflowedSite.isPinned());
-  },
-
-  /**
-   * We have a overflowed pinned site that we need to re-position so that it's
-   * visible again. We try to find a lower-priority cell (empty or containing
-   * an unpinned site) that we can move it to.
-   * @param aSites The array of sites.
-   * @param aCell The drop target cell.
-   */
-  _repositionOverflowedPinnedSite:
-    function DropPreview_repositionOverflowedPinnedSite(aSites, aCell) {
-
-    // Try to find a lower-priority cell (empty or containing an unpinned site).
-    let index = this._indexOfLowerPrioritySite(aSites, aCell);
-
-    if (index > -1) {
-      let cells = gGrid.cells;
-      let dropIndex = aCell.index;
-
-      // Move all pinned cells to their new positions to let the overflowed
-      // site fit into the grid.
-      for (let i = index + 1, lastPosition = index; i < aSites.length; i++) {
-        if (i != dropIndex) {
-          aSites[lastPosition] = aSites[i];
-          lastPosition = i;
-        }
-      }
-
-      // Finally, remove the overflowed site from its previous position.
-      aSites.splice(cells.length, 1);
-    }
-  },
-
-  /**
-   * Finds the index of the last cell that is empty or contains an unpinned
-   * site. These are considered to be of a lower priority.
-   * @param aSites The array of sites.
-   * @param aCell The drop target cell.
-   * @return The cell's index.
-   */
-  _indexOfLowerPrioritySite:
-    function DropPreview_indexOfLowerPrioritySite(aSites, aCell) {
-
-    let cells = gGrid.cells;
-    let dropIndex = aCell.index;
-
-    // Search (beginning with the last site in the grid) for a site that is
-    // empty or unpinned (an thus lower-priority) and can be pushed out of the
-    // grid instead of the pinned site.
-    for (let i = cells.length - 1; i >= 0; i--) {
-      // The cell that is our drop target is not a good choice.
-      if (i == dropIndex)
-        continue;
-
-      let site = aSites[i];
-
-      // We can use the cell only if it's empty or the site is un-pinned.
-      if (!site || !site.isPinned())
-        return i;
-    }
-
-    return -1;
-  }
-};