Add basic for pjax navigation

6 files changed, 237 insertions, 4 deletions

diff --git a/packages/gitbook-core/src/actions/navigation.js b/packages/gitbook-core/src/actions/navigation.js
index 0d00687..af0fdff 100644
--- a/packages/gitbook-core/src/actions/navigation.js
+++ b/packages/gitbook-core/src/actions/navigation.js
@@ -1,13 +1,116 @@
+const ACTION_TYPES = require('./TYPES');
+const getPayload = require('../lib/getPayload');
 
+const SUPPORTED = (
+    typeof window !== 'undefined' &&
+    window.history && window.history.pushState && window.history.replaceState &&
+    // pushState isn't reliable on iOS until 5.
+    !navigator.userAgent.match(/((iPod|iPhone|iPad).+\bOS\s+[1-4]\D|WebApps\/.+CFNetwork)/)
+);
+
+let PUSH_ID = 0;
+
+/**
+ * Generate a new state to be pushed or replaced
+ * @param {Object}
+ */
+function genState() {
+    return {
+        id: (PUSH_ID++)
+    };
+}
+
+/**
+ * Push a new url into the navigation
+ * @param {String} uri
+ * @return {Action} action
+ */
+function pushURI(uri) {
+    return () => {
+        const state = genState();
+
+        if (SUPPORTED) {
+            window.history.pushState(state, '', uri);
+        } else {
+            redirect(uri);
+        }
+    };
+}
+
+/**
+ * Replace current state in navigation
+ * @param {String} uri
+ * @return {Action} action
+ */
+function replaceURI(uri) {
+    return () => {
+        const state = genState();
+
+        if (SUPPORTED) {
+            window.history.replaceState(state, '', uri);
+        } else {
+            redirect(uri);
+        }
+    };
+}
+
+/**
+ * Hard redirection
+ * @param {String} uri
+ * @return {Action} action
+ */
+function redirect(uri) {
+    return () => {
+        window.location.href = uri;
+    };
+}
 
 /**
  * Fetch a new page and update the store accordingly
  * @param {String} uri
+ * @param {Boolean} options.replace
  * @return {Action} action
  */
-function fetchPage(uri) {
+function fetchPage(uri, options) {
+    const { replace } = options;
+
     return (dispatch, getState) => {
+        const prevURI = location.href;
+        dispatch({ type: ACTION_TYPES.PAGE_FETCH_START });
+
+        if (replace) {
+            dispatch(replaceURI(uri));
+        } else {
+            dispatch(pushURI(uri));
+        }
+
+        window.fetch(uri, {
+            credentials: 'include'
+        })
+        .then(
+            response => {
+                return response.text();
+            }
+        )
+        .then(
+            html => {
+                const payload = getPayload(html);
+
+                if (!payload) {
+                    throw new Error('No payload found in page');
+                }
+
+                dispatch({ type: ACTION_TYPES.PAGE_FETCH_END, payload });
+            }
+        )
+        .catch(
+            error => {
+                dispatch(replaceURI(prevURI));
+                dispatch(redirect(uri));
 
+                dispatch({ type: ACTION_TYPES.PAGE_FETCH_ERROR, error });
+            }
+        );
     };
 }
 
@@ -21,6 +124,7 @@ function fetchArticle(article) {
 }
 
 module.exports = {
+    pushURI,
     fetchPage,
     fetchArticle
 };
diff --git a/packages/gitbook-core/src/components/Link.js b/packages/gitbook-core/src/components/Link.js
index 2f909de..ade7461 100644
--- a/packages/gitbook-core/src/components/Link.js
+++ b/packages/gitbook-core/src/components/Link.js
@@ -1,4 +1,5 @@
 const React = require('react');
+const ReactRedux = require('react-redux');
 const SummaryArticleShape = require('../shapes/SummaryArticle');
 
 const Link = React.createClass({
@@ -35,4 +36,4 @@ const Link = React.createClass({
     }
 });
 
-module.exports = Link;
+module.exports = ReactRedux.connect()(Link);
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);
diff --git a/packages/gitbook-core/src/reducers/index.js b/packages/gitbook-core/src/reducers/index.js
index 49ea489..4785c1c 100644
--- a/packages/gitbook-core/src/reducers/index.js
+++ b/packages/gitbook-core/src/reducers/index.js
@@ -1,3 +1,5 @@
+const ACTION_TYPES = require('../actions/TYPES');
+
 const composeReducer = require('../composeReducer');
 const createReducer = require('../createReducer');
 
diff --git a/packages/gitbook-core/src/reducers/page.js b/packages/gitbook-core/src/reducers/page.js
index 98764c0..275fce7 100644
--- a/packages/gitbook-core/src/reducers/page.js
+++ b/packages/gitbook-core/src/reducers/page.js
@@ -1,4 +1,5 @@
 const { Record } = require('immutable');
+const ACTION_TYPES = require('../actions/TYPES');
 
 const DEFAULTS = {
     title:   '',
@@ -16,5 +17,15 @@ class PageState extends Record(DEFAULTS) {
 }
 
 module.exports = (state, action) => {
-    return PageState.create(state);
+    state = PageState.create(state);
+
+    switch (action.type) {
+
+    case ACTION_TYPES.PAGE_FETCH_END:
+        return state.merge(action.payload.page);
+
+    default:
+        return state;
+
+    }
 };
diff --git a/packages/gitbook-core/src/renderWithStore.js b/packages/gitbook-core/src/renderWithStore.js
index af86704..48fff89 100644
--- a/packages/gitbook-core/src/renderWithStore.js
+++ b/packages/gitbook-core/src/renderWithStore.js
@@ -1,6 +1,7 @@
 const React = require('react');
 const { Provider } = require('react-redux');
 const { InjectedComponent } = require('./components/InjectedComponent');
+const PJAXWrapper = require('./components/PJAXWrapper');
 
 /**
  * Render the application for a store
@@ -10,7 +11,9 @@ const { InjectedComponent } = require('./components/InjectedComponent');
 function renderWithStore(store) {
     return (
         <Provider store={store}>
-            <InjectedComponent matching={{ role: 'Body' }} />
+            <PJAXWrapper>
+                <InjectedComponent matching={{ role: 'Body' }} />
+            </PJAXWrapper>
         </Provider>
     );
 }