Bring all of jekyll-text-theme _includes into site

1 files changed, 111 insertions, 0 deletions

diff --git a/_includes/scripts/lib/affix.js b/_includes/scripts/lib/affix.js
new file mode 100644
index 0000000..779442f
--- /dev/null
+++ b/_includes/scripts/lib/affix.js
@@ -0,0 +1,111 @@
+(function() {
+  var SOURCES = window.TEXT_VARIABLES.sources;
+  window.Lazyload.js(SOURCES.jquery, function() {
+    function affix(options) {
+      var $root = this, $window = $(window), $scrollTarget, $scroll,
+        offsetBottom = 0, scrollTarget = window, scroll = window.document, disabled = false, isOverallScroller = true,
+        rootTop, rootLeft, rootHeight, scrollBottom, rootBottomTop,
+        hasInit = false, curState;
+
+      function setOptions(options) {
+        var _options = options || {};
+        _options.offsetBottom && (offsetBottom = _options.offsetBottom);
+        _options.scrollTarget && (scrollTarget = _options.scrollTarget);
+        _options.scroll && (scroll = _options.scroll);
+        _options.disabled !== undefined && (disabled = _options.disabled);
+        $scrollTarget = $(scrollTarget);
+        isOverallScroller = window.isOverallScroller($scrollTarget[0]);
+        $scroll = $(scroll);
+      }
+      function preCalc() {
+        top();
+        rootHeight = $root.outerHeight();
+        rootTop = $root.offset().top + (isOverallScroller ? 0 :  $scrollTarget.scrollTop());
+        rootLeft = $root.offset().left;
+      }
+      function calc(needPreCalc) {
+        needPreCalc && preCalc();
+        scrollBottom = $scroll.outerHeight() - offsetBottom - rootHeight;
+        rootBottomTop = scrollBottom - rootTop;
+      }
+      function top() {
+        if (curState !== 'top') {
+          $root.removeClass('fixed').css({
+            left: 0,
+            top: 0
+          });
+          curState = 'top';
+        }
+      }
+      function fixed() {
+        if (curState !== 'fixed') {
+          $root.addClass('fixed').css({
+            left: rootLeft + 'px',
+            top: 0
+          });
+          curState = 'fixed';
+        }
+      }
+      function bottom() {
+        if (curState !== 'bottom') {
+          $root.removeClass('fixed').css({
+            left: 0,
+            top: rootBottomTop + 'px'
+          });
+          curState = 'bottom';
+        }
+      }
+      function setState() {
+        var scrollTop = $scrollTarget.scrollTop();
+        if (scrollTop >= rootTop && scrollTop <= scrollBottom) {
+          fixed();
+        } else if (scrollTop < rootTop) {
+          top();
+        } else {
+          bottom();
+        }
+      }
+      function init() {
+        if(!hasInit) {
+          var interval, timeout;
+          calc(true); setState();
+          // run calc every 100 millisecond
+          interval = setInterval(function() {
+            calc();
+          }, 100);
+          timeout = setTimeout(function() {
+            clearInterval(interval);
+          }, 45000);
+          window.pageLoad.then(function() {
+            setTimeout(function() {
+              clearInterval(interval);
+              clearTimeout(timeout);
+            }, 3000);
+          });
+          $scrollTarget.on('scroll', function() {
+            disabled || setState();
+          });
+          $window.on('resize', function() {
+            disabled || (calc(true), setState());
+          });
+          hasInit = true;
+        }
+      }
+
+      setOptions(options);
+      if (!disabled) {
+        init();
+      }
+      $window.on('resize', window.throttle(function() {
+        init();
+      }, 200));
+      return {
+        setOptions: setOptions,
+        refresh: function() {
+          calc(true, { animation: false }); setState();
+        }
+      };
+    }
+    $.fn.affix = affix;
+  });
+})();