Upgrade to 1.0 and switch clients to dom-repeat where needed.

third_party/polymer/v0_8/components-chromium/paper-tabs/paper-tabs-extracted.js

+
+
+  Polymer({
+
+    is: 'paper-tabs',
+
+    behaviors: [
+      Polymer.IronResizableBehavior,
+      Polymer.IronMenubarBehavior
+    ],
+
+    properties: {
+
+      /**
+       * If true, ink ripple effect is disabled.
+       */
+      noink: {
+        type: Boolean,
+        value: false
+      },
+
+      /**
+       * If true, the bottom bar to indicate the selected tab will not be shown.
+       */
+      noBar: {
+        type: Boolean,
+        value: false
+      },
+
+      /**
+       * If true, the slide effect for the bottom bar is disabled.
+       */
+      noSlide: {
+        type: Boolean,
+        value: false
+      },
+
+      /**
+       * If true, tabs are scrollable and the tab width is based on the label width.
+       */
+      scrollable: {
+        type: Boolean,
+        value: false
+      },
+
+      /**
+       * If true, dragging on the tabs to scroll is disabled.
+       */
+      disableDrag: {
+        type: Boolean,
+        value: false
+      },
+
+      /**
+       * If true, scroll buttons (left/right arrow) will be hidden for scrollable tabs.
+       */
+      hideScrollButtons: {
+        type: Boolean,
+        value: false
+      },
+
+      /**
+       * If true, the tabs are aligned to bottom (the selection bar appears at the top).
+       */
+      alignBottom: {
+        type: Boolean,
+        value: false
+      },
+
+      /**
+       * Gets or sets the selected element. The default is to use the index of the item.
+       */
+      selected: {
+        type: String,
+        notify: true
+      },
+
+      selectable: {
+        type: String,
+        value: 'paper-tab'
+      },
+
+      _step: {
+        type: Number,
+        value: 10
+      },
+
+      _holdDelay: {
+        type: Number,
+        value: 1
+      },
+
+      _leftHidden: {
+        type: Boolean,
+        value: false
+      },
+
+      _rightHidden: {
+        type: Boolean,
+        value: false
+      },
+
+      _previousTab: {
+        type: Object
+      }
+    },
+
+    hostAttributes: {
+      role: 'tablist'
+    },
+
+    listeners: {
+      'iron-resize': '_onResize',
+      'iron-select': '_onIronSelect',
+      'iron-deselect': '_onIronDeselect'
+    },
+
+    _computeScrollButtonClass: function(hideThisButton, scrollable, hideScrollButtons) {
+      if (!scrollable || hideScrollButtons) {
+        return 'hidden';
+      }
+
+      if (hideThisButton) {
+        return 'not-visible';
+      }
+
+      return '';
+    },
+
+    _computeTabsContentClass: function(scrollable) {
+      return scrollable ? 'scrollable' : 'horizontal layout';
+    },
+
+    _computeSelectionBarClass: function(noBar, alignBottom) {
+      if (noBar) {
+        return 'hidden';
+      } else if (alignBottom) {
+        return 'align-bottom';
+      }
+    },
+
+    // TODO(cdata): Add `track` response back in when gesture lands.
+
+    _onResize: function() {
+      this.debounce('_onResize', function() {
+        this._scroll();
+        this._tabChanged(this.selectedItem);
+      }, 10);
+    },
+
+    _onIronSelect: function(event) {
+      this._tabChanged(event.detail.item, this._previousTab);
+      this._previousTab = event.detail.item;
+      this.cancelDebouncer('tab-changed');
+    },
+
+    _onIronDeselect: function(event) {
+      this.debounce('tab-changed', function() {
+        this._tabChanged(null, this._previousTab);
+      // See polymer/polymer#1305
+      }, 1);
+    },
+
+    get _tabContainerScrollSize () {
+      return Math.max(
+        0,
+        this.$.tabsContainer.scrollWidth -
+          this.$.tabsContainer.offsetWidth
+      );
+    },
+
+    _scroll: function() {
+      var scrollLeft;
+
+      if (!this.scrollable) {
+        return;
+      }
+
+      scrollLeft = this.$.tabsContainer.scrollLeft;
+
+      this._leftHidden = scrollLeft === 0;
+      this._rightHidden = scrollLeft === this._tabContainerScrollSize;
+    },
+
+    _onLeftScrollButtonDown: function() {
+      this._holdJob = setInterval(this._scrollToLeft.bind(this), this._holdDelay);
+    },
+
+    _onRightScrollButtonDown: function() {
+      this._holdJob = setInterval(this._scrollToRight.bind(this), this._holdDelay);
+    },
+
+    _onScrollButtonUp: function() {
+      clearInterval(this._holdJob);
+      this._holdJob = null;
+    },
+
+    _scrollToLeft: function() {
+      this.$.tabsContainer.scrollLeft -= this._step;
+    },
+
+    _scrollToRight: function() {
+      this.$.tabsContainer.scrollLeft += this._step;
+    },
+
+    _tabChanged: function(tab, old) {
+      if (!tab) {
+        this._positionBar(0, 0);
+        return;
+      }
+
+      var r = this.$.tabsContent.getBoundingClientRect();
+      var w = r.width;
+      var tabRect = tab.getBoundingClientRect();
+      var tabOffsetLeft = tabRect.left - r.left;
+
+      this._pos = {
+        width: this._calcPercent(tabRect.width, w),
+        left: this._calcPercent(tabOffsetLeft, w)
+      };
+
+      if (this.noSlide || old == null) {
+        // position bar directly without animation
+        this._positionBar(this._pos.width, this._pos.left);
+        return;
+      }
+
+      var oldRect = old.getBoundingClientRect();
+      var oldIndex = this.items.indexOf(old);
+      var index = this.items.indexOf(tab);
+      var m = 5;
+
+      // bar animation: expand
+      this.$.selectionBar.classList.add('expand');
+
+      if (oldIndex < index) {
+        this._positionBar(this._calcPercent(tabRect.left + tabRect.width - oldRect.left, w) - m,
+            this._left);
+      } else {
+        this._positionBar(this._calcPercent(oldRect.left + oldRect.width - tabRect.left, w) - m,
+            this._calcPercent(tabOffsetLeft, w) + m);
+      }
+
+      if (this.scrollable) {
+        this._scrollToSelectedIfNeeded(tabRect.width, tabOffsetLeft);
+      }
+    },
+
+    _scrollToSelectedIfNeeded: function(tabWidth, tabOffsetLeft) {
+      var l = tabOffsetLeft - this.$.tabsContainer.scrollLeft;
+      if (l < 0) {
+        this.$.tabsContainer.scrollLeft += l;
+      } else {
+        l += (tabWidth - this.$.tabsContainer.offsetWidth);
+        if (l > 0) {
+          this.$.tabsContainer.scrollLeft += l;
+        }
+      }
+    },
+
+    _calcPercent: function(w, w0) {
+      return 100 * w / w0;
+    },
+
+    _positionBar: function(width, left) {
+      this._width = width;
+      this._left = left;
+      this.transform(
+          'translate3d(' + left + '%, 0, 0) scaleX(' + (width / 100) + ')',
+          this.$.selectionBar);
+    },
+
+    _onBarTransitionEnd: function(e) {
+      var cl = this.$.selectionBar.classList;
+      // bar animation: expand -> contract
+      if (cl.contains('expand')) {
+        cl.remove('expand');
+        cl.add('contract');
+        this._positionBar(this._pos.width, this._pos.left);
+      // bar animation done
+      } else if (cl.contains('contract')) {
+        cl.remove('contract');
+      }
+    }
+
+  });
+