Initial OpenECOMP Portal commit

[portal.git] / ecomp-portal-FE / client / bower_components / jqTree / lib / scroll_handler.js

diff --git a/ecomp-portal-FE/client/bower_components/jqTree/lib/scroll_handler.js b/ecomp-portal-FE/client/bower_components/jqTree/lib/scroll_handler.js
new file mode 100644 (file)
index 0000000..2b8e707
--- /dev/null
+++ b/ecomp-portal-FE/client/bower_components/jqTree/lib/scroll_handler.js
@@ -0,0 +1,137 @@
+var $, ScrollHandler;
+
+$ = jQuery;
+
+ScrollHandler = (function() {
+  function ScrollHandler(tree_widget) {
+    this.tree_widget = tree_widget;
+    this.previous_top = -1;
+    this.is_initialized = false;
+  }
+
+  ScrollHandler.prototype._initScrollParent = function() {
+    var $scroll_parent, getParentWithOverflow, setDocumentAsScrollParent;
+    getParentWithOverflow = (function(_this) {
+      return function() {
+        var css_values, el, hasOverFlow, i, len, ref;
+        css_values = ['overflow', 'overflow-y'];
+        hasOverFlow = function(el) {
+          var css_value, i, len, ref;
+          for (i = 0, len = css_values.length; i < len; i++) {
+            css_value = css_values[i];
+            if ((ref = $.css(el, css_value)) === 'auto' || ref === 'scroll') {
+              return true;
+            }
+          }
+          return false;
+        };
+        if (hasOverFlow(_this.tree_widget.$el[0])) {
+          return _this.tree_widget.$el;
+        }
+        ref = _this.tree_widget.$el.parents();
+        for (i = 0, len = ref.length; i < len; i++) {
+          el = ref[i];
+          if (hasOverFlow(el)) {
+            return $(el);
+          }
+        }
+        return null;
+      };
+    })(this);
+    setDocumentAsScrollParent = (function(_this) {
+      return function() {
+        _this.scroll_parent_top = 0;
+        return _this.$scroll_parent = null;
+      };
+    })(this);
+    if (this.tree_widget.$el.css('position') === 'fixed') {
+      setDocumentAsScrollParent();
+    }
+    $scroll_parent = getParentWithOverflow();
+    if ($scroll_parent && $scroll_parent.length && $scroll_parent[0].tagName !== 'HTML') {
+      this.$scroll_parent = $scroll_parent;
+      this.scroll_parent_top = this.$scroll_parent.offset().top;
+    } else {
+      setDocumentAsScrollParent();
+    }
+    return this.is_initialized = true;
+  };
+
+  ScrollHandler.prototype._ensureInit = function() {
+    if (!this.is_initialized) {
+      return this._initScrollParent();
+    }
+  };
+
+  ScrollHandler.prototype.checkScrolling = function() {
+    var hovered_area;
+    this._ensureInit();
+    hovered_area = this.tree_widget.dnd_handler.hovered_area;
+    if (hovered_area && hovered_area.top !== this.previous_top) {
+      this.previous_top = hovered_area.top;
+      if (this.$scroll_parent) {
+        return this._handleScrollingWithScrollParent(hovered_area);
+      } else {
+        return this._handleScrollingWithDocument(hovered_area);
+      }
+    }
+  };
+
+  ScrollHandler.prototype._handleScrollingWithScrollParent = function(area) {
+    var distance_bottom;
+    distance_bottom = this.scroll_parent_top + this.$scroll_parent[0].offsetHeight - area.bottom;
+    if (distance_bottom < 20) {
+      this.$scroll_parent[0].scrollTop += 20;
+      this.tree_widget.refreshHitAreas();
+      return this.previous_top = -1;
+    } else if ((area.top - this.scroll_parent_top) < 20) {
+      this.$scroll_parent[0].scrollTop -= 20;
+      this.tree_widget.refreshHitAreas();
+      return this.previous_top = -1;
+    }
+  };
+
+  ScrollHandler.prototype._handleScrollingWithDocument = function(area) {
+    var distance_top;
+    distance_top = area.top - $(document).scrollTop();
+    if (distance_top < 20) {
+      return $(document).scrollTop($(document).scrollTop() - 20);
+    } else if ($(window).height() - (area.bottom - $(document).scrollTop()) < 20) {
+      return $(document).scrollTop($(document).scrollTop() + 20);
+    }
+  };
+
+  ScrollHandler.prototype.scrollTo = function(top) {
+    var tree_top;
+    this._ensureInit();
+    if (this.$scroll_parent) {
+      return this.$scroll_parent[0].scrollTop = top;
+    } else {
+      tree_top = this.tree_widget.$el.offset().top;
+      return $(document).scrollTop(top + tree_top);
+    }
+  };
+
+  ScrollHandler.prototype.isScrolledIntoView = function(element) {
+    var $element, element_bottom, element_top, view_bottom, view_top;
+    this._ensureInit();
+    $element = $(element);
+    if (this.$scroll_parent) {
+      view_top = 0;
+      view_bottom = this.$scroll_parent.height();
+      element_top = $element.offset().top - this.scroll_parent_top;
+      element_bottom = element_top + $element.height();
+    } else {
+      view_top = $(window).scrollTop();
+      view_bottom = view_top + $(window).height();
+      element_top = $element.offset().top;
+      element_bottom = element_top + $element.height();
+    }
+    return (element_bottom <= view_bottom) && (element_top >= view_top);
+  };
+
+  return ScrollHandler;
+
+})();
+
+module.exports = ScrollHandler;