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authorwolfbeast <mcwerewolf@gmail.com>2018-06-04 13:17:38 +0200
committerwolfbeast <mcwerewolf@gmail.com>2018-06-04 13:17:38 +0200
commita1be17c1cea81ebb1e8b131a662c698d78f3f7f2 (patch)
treea92f7de513be600cc07bac458183e9af40e00c06 /application/basilisk/base/content/newtab/grid.js
parentbf11fdd304898ac675e39b01b280d39550e419d0 (diff)
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Issue #303 Part 1: Move basilisk files from /browser to /application/basilisk
Diffstat (limited to 'application/basilisk/base/content/newtab/grid.js')
-rw-r--r--application/basilisk/base/content/newtab/grid.js279
1 files changed, 279 insertions, 0 deletions
diff --git a/application/basilisk/base/content/newtab/grid.js b/application/basilisk/base/content/newtab/grid.js
new file mode 100644
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+++ b/application/basilisk/base/content/newtab/grid.js
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+#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
+
+/**
+ * Define various fixed dimensions
+ */
+const GRID_BOTTOM_EXTRA = 7; // title's line-height extends 7px past the margin
+const GRID_WIDTH_EXTRA = 1; // provide 1px buffer to allow for rounding error
+const SPONSORED_TAG_BUFFER = 2; // 2px buffer to clip off top of sponsored tag
+
+/**
+ * This singleton represents the grid that contains all sites.
+ */
+var gGrid = {
+ /**
+ * The DOM node of the grid.
+ */
+ _node: null,
+ _gridDefaultContent: null,
+ get node() { return this._node; },
+
+ /**
+ * The cached DOM fragment for sites.
+ */
+ _siteFragment: null,
+
+ /**
+ * All cells contained in the grid.
+ */
+ _cells: [],
+ get cells() { return this._cells; },
+
+ /**
+ * All sites contained in the grid's cells. Sites may be empty.
+ */
+ get sites() { return [for (cell of this.cells) cell.site]; },
+
+ // Tells whether the grid has already been initialized.
+ get ready() { return !!this._ready; },
+
+ // Returns whether the page has finished loading yet.
+ get isDocumentLoaded() { return document.readyState == "complete"; },
+
+ /**
+ * Initializes the grid.
+ * @param aSelector The query selector of the grid.
+ */
+ init: function Grid_init() {
+ this._node = document.getElementById("newtab-grid");
+ this._gridDefaultContent = this._node.lastChild;
+ this._createSiteFragment();
+
+ gLinks.populateCache(() => {
+ this._refreshGrid();
+ this._ready = true;
+
+ // If fetching links took longer than loading the page itself then
+ // we need to resize the grid as that was blocked until now.
+ // We also want to resize now if the page was already loaded when
+ // initializing the grid (the user toggled the page).
+ this._resizeGrid();
+
+ addEventListener("resize", this);
+ });
+
+ // Resize the grid as soon as the page loads.
+ if (!this.isDocumentLoaded) {
+ addEventListener("load", this);
+ }
+ },
+
+ /**
+ * Creates a new site in the grid.
+ * @param aLink The new site's link.
+ * @param aCell The cell that will contain the new site.
+ * @return The newly created site.
+ */
+ createSite: function Grid_createSite(aLink, aCell) {
+ let node = aCell.node;
+ node.appendChild(this._siteFragment.cloneNode(true));
+ return new Site(node.firstElementChild, aLink);
+ },
+
+ /**
+ * Handles all grid events.
+ */
+ handleEvent: function Grid_handleEvent(aEvent) {
+ switch (aEvent.type) {
+ case "load":
+ case "resize":
+ this._resizeGrid();
+ break;
+ }
+ },
+
+ /**
+ * Locks the grid to block all pointer events.
+ */
+ lock: function Grid_lock() {
+ this.node.setAttribute("locked", "true");
+ },
+
+ /**
+ * Unlocks the grid to allow all pointer events.
+ */
+ unlock: function Grid_unlock() {
+ this.node.removeAttribute("locked");
+ },
+
+ /**
+ * Renders and resizes the gird. _resizeGrid() call is needed to ensure
+ * that scrollbar disappears when the bottom row becomes empty following
+ * the block action, or tile display is turmed off via cog menu
+ */
+
+ refresh() {
+ this._refreshGrid();
+ this._resizeGrid();
+ },
+
+ /**
+ * Renders the grid, including cells and sites.
+ */
+ _refreshGrid() {
+ let cell = document.createElementNS(HTML_NAMESPACE, "div");
+ cell.classList.add("newtab-cell");
+
+ // Creates all the cells up to the maximum
+ let fragment = document.createDocumentFragment();
+ for (let i = 0; i < gGridPrefs.gridColumns * gGridPrefs.gridRows; i++) {
+ fragment.appendChild(cell.cloneNode(true));
+ }
+
+ // Create cells.
+ let cells = Array.from(fragment.childNodes, (cell) => new Cell(this, cell));
+
+ // Fetch links.
+ let links = gLinks.getLinks();
+
+ // Create sites.
+ let numLinks = Math.min(links.length, cells.length);
+ let hasHistoryTiles = false;
+ for (let i = 0; i < numLinks; i++) {
+ if (links[i]) {
+ this.createSite(links[i], cells[i]);
+ if (links[i].type == "history") {
+ hasHistoryTiles = true;
+ }
+ }
+ }
+
+ this._cells = cells;
+ while (this._gridDefaultContent.nextSibling) {
+ this._gridDefaultContent.nextSibling.remove();
+ }
+ this._node.appendChild(fragment);
+
+ document.getElementById("topsites-heading").textContent =
+ hasHistoryTiles ? "Your Top Sites" : "Top Sites";
+ },
+
+ /**
+ * Calculate the height for a number of rows up to the maximum rows
+ * @param rows Number of rows defaulting to the max
+ */
+ _computeHeight: function Grid_computeHeight(aRows) {
+ let {gridRows} = gGridPrefs;
+ aRows = aRows === undefined ? gridRows : Math.min(gridRows, aRows);
+ return aRows * this._cellHeight + GRID_BOTTOM_EXTRA;
+ },
+
+ /**
+ * Creates the DOM fragment that is re-used when creating sites.
+ */
+ _createSiteFragment: function Grid_createSiteFragment() {
+ let site = document.createElementNS(HTML_NAMESPACE, "div");
+ site.classList.add("newtab-site");
+ site.setAttribute("draggable", "true");
+
+ // Create the site's inner HTML code.
+ site.innerHTML =
+ '<span class="newtab-sponsored">' + newTabString("sponsored.button") + '</span>' +
+ '<a class="newtab-link">' +
+ ' <span class="newtab-thumbnail placeholder"/>' +
+ ' <span class="newtab-thumbnail thumbnail"/>' +
+ ' <span class="newtab-thumbnail enhanced-content"/>' +
+ ' <span class="newtab-title"/>' +
+ '</a>' +
+ '<input type="button" title="' + newTabString("pin") + '"' +
+ ' class="newtab-control newtab-control-pin"/>' +
+ '<input type="button" title="' + newTabString("block") + '"' +
+ ' class="newtab-control newtab-control-block"/>' +
+ '<span class="newtab-suggested"/>';
+
+ this._siteFragment = document.createDocumentFragment();
+ this._siteFragment.appendChild(site);
+ },
+
+ /**
+ * Test a tile at a given position for being pinned or history
+ * @param position Position in sites array
+ */
+ _isHistoricalTile: function Grid_isHistoricalTile(aPos) {
+ let site = this.sites[aPos];
+ return site && (site.isPinned() || site.link && site.link.type == "history");
+ },
+
+ /**
+ * Make sure the correct number of rows and columns are visible
+ */
+ _resizeGrid: function Grid_resizeGrid() {
+ // If we're somehow called before the page has finished loading,
+ // let's bail out to avoid caching zero heights and widths.
+ // We'll be called again when DOMContentLoaded fires.
+ // Same goes for the grid if that's not ready yet.
+ if (!this.isDocumentLoaded || !this._ready) {
+ return;
+ }
+
+ // Save the cell's computed height/width including margin and border
+ if (this._cellHeight === undefined) {
+ let refCell = document.querySelector(".newtab-cell");
+ let style = getComputedStyle(refCell);
+ this._cellHeight = refCell.offsetHeight +
+ parseFloat(style.marginTop) + parseFloat(style.marginBottom);
+ this._cellWidth = refCell.offsetWidth +
+ parseFloat(style.marginLeft) + parseFloat(style.marginRight);
+ }
+
+ let searchContainer = document.querySelector("#newtab-search-container");
+ // Save search-container margin height
+ if (this._searchContainerMargin === undefined) {
+ let style = getComputedStyle(searchContainer);
+ this._searchContainerMargin = parseFloat(style.marginBottom) +
+ parseFloat(style.marginTop);
+ }
+
+ // Find the number of rows we can place into view port
+ let availHeight = document.documentElement.clientHeight -
+ searchContainer.offsetHeight - this._searchContainerMargin;
+ let visibleRows = Math.floor(availHeight / this._cellHeight);
+
+ // Find the number of columns that fit into view port
+ let maxGridWidth = gGridPrefs.gridColumns * this._cellWidth + GRID_WIDTH_EXTRA;
+ // available width is current grid width, but no greater than maxGridWidth
+ let availWidth = Math.min(document.querySelector("#newtab-grid").clientWidth,
+ maxGridWidth);
+ // finally get the number of columns we can fit into view port
+ let gridColumns = Math.floor(availWidth / this._cellWidth);
+ // walk sites backwords until a pinned or history tile is found or visibleRows reached
+ let tileIndex = Math.min(gGridPrefs.gridRows * gridColumns, this.sites.length) - 1;
+ while (tileIndex >= visibleRows * gridColumns) {
+ if (this._isHistoricalTile(tileIndex)) {
+ break;
+ }
+ tileIndex--;
+ }
+
+ // Compute the actual number of grid rows we will display (potentially
+ // with a scroll bar). tileIndex now points to a historical tile with
+ // heighest index or to the last index of the visible row, if none found
+ // Dividing tileIndex by number of tiles in a column gives the rows
+ let gridRows = Math.floor(tileIndex / gridColumns) + 1;
+
+ // we need to set grid width, for otherwise the scrollbar may shrink
+ // the grid when shown and cause grid layout to be different from
+ // what being computed above. This, in turn, may cause scrollbar shown
+ // for directory tiles, and introduce jitter when grid width is aligned
+ // exactly on the column boundary
+ this._node.style.width = gridColumns * this._cellWidth + "px";
+ this._node.style.maxWidth = gGridPrefs.gridColumns * this._cellWidth +
+ GRID_WIDTH_EXTRA + "px";
+ this._node.style.height = this._computeHeight() + "px";
+ this._node.style.maxHeight = this._computeHeight(gridRows) - SPONSORED_TAG_BUFFER + "px";
+ }
+};