1 files changed, 112 insertions, 0 deletions
diff --git a/packages/gitbook-core/src/components/PJAXWrapper.js b/packages/gitbook-core/src/components/PJAXWrapper.js
new file mode 100644
index 0000000..f35a554
--- /dev/null
+++ b/packages/gitbook-core/src/components/PJAXWrapper.js
@@ -0,0 +1,112 @@
+const React = require('react');
+const ReactRedux = require('react-redux');
+const navigation = require('../actions/navigation');
+
+/**
+ * Check if an element is inside a link
+ * @param {DOMElement} el
+ * @param {String} name
+ * @return {DOMElement|undefined
+ */
+function findParentByTagName(el, name) {
+    while (el && el !== document) {
+        if (el.tagName && el.tagName.toUpperCase() === name) {
+            return el;
+        }
+        el = el.parentNode;
+    }
+
+    return false;
+}
+
+/**
+ * Internal: Return the `href` component of given URL object with the hash
+ * portion removed.
+ *
+ * @param {Location|HTMLAnchorElement} location
+ * @return {String}
+ */
+function stripHash(location) {
+    return location.href.replace(/#.*/, '');
+}
+
+/**
+ * Test if a click event should be handled,
+ * return the new url if it's a normal lcick
+ */
+function getHrefForEvent(event) {
+    const link = findParentByTagName(event.target, 'A');
+
+    if (!link)
+        return;
+
+    // Middle click, cmd click, and ctrl click should open
+    // links in a new tab as normal.
+    if (event.which > 1 || event.metaKey || event.ctrlKey || event.shiftKey || event.altKey)
+        return;
+
+    // Ignore cross origin links
+    if (location.protocol !== link.protocol || location.hostname !== link.hostname)
+        return;
+
+    // Ignore case when a hash is being tacked on the current URL
+    if (link.href.indexOf('#') > -1 && stripHash(link) == stripHash(location))
+        return;
+
+    // Ignore event with default prevented
+    if (event.defaultPrevented)
+        return;
+
+    // Explicitly ignored
+    if (link.getAttribute('data-nopjax'))
+        return;
+
+    return link.href;
+}
+
+/*
+    Wrapper to bind all navigation events to fetch pages.
+ */
+
+const PJAXWrapper = React.createClass({
+    propTypes: {
+        children: React.PropTypes.node,
+        dispatch: React.PropTypes.func
+    },
+
+    onClick(event) {
+        const { dispatch } = this.props;
+        const href = getHrefForEvent(event);
+
+        if (!href) {
+            return;
+        }
+
+        event.preventDefault();
+        dispatch(navigation.fetchPage(href));
+
+    },
+
+    onPopState(event) {
+        const { dispatch } = this.props;
+        event.preventDefault();
+
+        dispatch(navigation.fetchPage(location.href, { replace: true }));
+    },
+
+    componentDidMount() {
+        document.addEventListener('click', this.onClick, false);
+        window.addEventListener('popstate', this.onPopState, false);
+    },
+
+    componentWillUnmount() {
+        document.removeEventListener('click', this.onClick, false);
+        window.removeEventListener('popstate', this.onPopState, false);
+    },
+
+    render() {
+        return React.Children.only(this.props.children);
+    }
+});
+
+module.exports = ReactRedux.connect()(PJAXWrapper);