Allow to enable server side search for MkDocs

readthedocs/core/static-src/core/js/doc-embed/search.js

@@ -1,5 +1,5 @@
 /*
- * Sphinx search overrides
+ * Sphinx and Mkdocs search overrides
  */
 
 var rtddata = require('./rtd-data');
@@ -40,7 +40,7 @@ function append_html_to_contents(contents, template, data) {
  * Sphinx indexer. This will fall back to the standard indexer on an API
  * failure,
  */
-function attach_elastic_search_query(data) {
+function attach_elastic_search_query_sphinx(data) {
     var project = data.project;
     var version = data.version;
     var language = data.language || 'en';
@@ -56,7 +56,6 @@ function attach_elastic_search_query(data) {
         search_def
             .then(function (data) {
                 var hit_list = data.results || [];
-                var total_count = data.count || 0;
 
                 if (hit_list.length) {
                     for (var i = 0; i < hit_list.length; i += 1) {
@@ -265,12 +264,13 @@ function attach_elastic_search_query(data) {
     };
 
     if (typeof Search !== 'undefined' && project && version) {
-
         // Do not replace the built-in search if RTD's docsearch is disabled
         if (!data.features || !data.features.docsearch_disabled) {
             var query_fallback = Search.query;
             Search.query_fallback = query_fallback;
             Search.query = query_override;
+        } else {
+            console.log('Server side search is disabled.');
         }
     }
     $(document).ready(function () {
@@ -281,9 +281,173 @@ function attach_elastic_search_query(data) {
 }
 
 
+/*
+ * Mkdocs search override for hitting our API instead of the standard Mkdocs search index.
+ * This will fall back to the original search on an API failure.
+ */
+function attach_elastic_search_query_mkdocs(data) {
+    var project = data.project;
+    var version = data.version;
+    var language = data.language || 'en';
+
+    var fallbackSearch = function () {
+        if (typeof window.doSearchFallback !== 'undefined') {
+            window.doSearchFallback();
+        } else {
+            console.log('Unable to fallback to original MkDocs search.');
+        }
+    };
+
+    var doSearch = function () {
+        var query = document.getElementById('mkdocs-search-query').value;
+
+        var search_def = $.Deferred();
+
+        var search_url = document.createElement('a');
+        search_url.href = data.proxied_api_host + '/api/v2/docsearch/';
+        search_url.search = '?q=' + encodeURIComponent(query) + '&project=' + project +
+                            '&version=' + version + '&language=' + language;
+
+        search_def
+            .then(function (data) {
+                var hit_list = data.results || [];
+
+                if (hit_list.length) {
+                    var searchResults = $('#mkdocs-search-results');
+                    searchResults.empty();
+
+                    for (var i = 0; i < hit_list.length; i += 1) {
+                        var doc = hit_list[i];
+                        var inner_hits = doc.inner_hits || [];
+
+                        var result = $('<article>');
+                        result.append(
+                            $('<h3>').append($('<a>', {'href': doc.link, 'text': doc.title}))
+                        );
+
+                        if (doc.project !== project) {
+                            var text = '(from project ' + doc.project + ')';
+                            result.append($('<span>', {'text': text}));
+                        }
+
+                        for (var j = 0; j < inner_hits.length; j += 1) {
+                            var section = inner_hits[j];
+
+                            if (section.type === 'sections') {
+                                var section_link = doc.link + '#' + section._source.id;
+                                var section_title = section._source.title;
+                                var section_content = section._source.content;
+                                if (section_content.length > MAX_SUBSTRING_LIMIT) {
+                                    section_content = section_content.substr(0, MAX_SUBSTRING_LIMIT) + " ...";
+                                }
+                                var section_contents = [section_content];
+
+                                if (section.highlight) {
+                                    if (section.highlight["sections.title"]) {
+                                        section_title = section.highlight["sections.title"][0];
+                                    }
+                                    if (section.highlight["sections.content"]) {
+                                        var contents = section.highlight["sections.content"];
+                                        section_contents = [];
+                                        for (
+                                            var k = 0;
+                                            k < contents.length && k < MAX_RESULT_PER_SECTION;
+                                            k += 1
+                                        ) {
+                                            section_contents.push("... " + contents[k] + " ...");
+                                        }
+                                    }
+                                }
+
+                                result.append(
+                                    $('<h4>')
+                                    .append($('<a>', {'href': section_link}).html(xss(section_title)))
+                                );
+                                for (var m = 0; m < section_contents.length; m += 1) {
+                                    var content = xss(section_contents[m]);
+                                    result.append(
+                                        $('<p>').html(section_contents)
+                                    );
+                                }
+                                searchResults.append(result);
+                            }
+                        }
+                    }
+                } else {
+                    console.log('Read the Docs search returned 0 result. Falling back to MkDocs search.');
+                    fallbackSearch();
+                }
+            })
+            .fail(function (error) {
+                console.log('Read the Docs search failed. Falling back to MkDocs search.');
+                fallbackSearch();
+            });
+
+        $.ajax({
+            url: search_url.href,
+            crossDomain: true,
+            xhrFields: {
+                withCredentials: true,
+            },
+            complete: function (resp, status_code) {
+                if (
+                    status_code !== 'success' ||
+                    typeof (resp.responseJSON) === 'undefined' ||
+                    resp.responseJSON.count === 0
+                ) {
+                    return search_def.reject();
+                }
+                return search_def.resolve(resp.responseJSON);
+            }
+        })
+        .fail(function (resp, status_code, error) {
+              return search_def.reject();
+        });
+    };
+
+    var initSearch = function () {
+        var search_input = document.getElementById('mkdocs-search-query');
+        if (search_input) {
+            search_input.addEventListener('keyup', doSearch);
+        }
+
+        var term = window.getSearchTermFromLocation();
+        if (term) {
+            search_input.value = term;
+            doSearch();
+        }
+    };
+
+    $(document).ready(function () {
+        // We can't override the search completely,
+        // because we can't delete the original event listener,
+        // and MkDocs includes its search functions after ours.
+        // If MkDocs is loaded before, this will trigger a double search
+        // (but ours will have precendece).
+
+        // Note: this function is only available on Mkdocs >=1.x
+        window.doSearchFallback = window.doSearch;
+
+        window.doSearch = doSearch;
+        window.initSearch = initSearch;
+        initSearch();
+    });
+}
+
+
 function init() {
     var data = rtddata.get();
-    attach_elastic_search_query(data);
+    if (data.is_sphinx_builder()) {
+        // Check to disabled server side search for Sphinx
+        // happens inside the function, because we still need to call Search.init().
+        attach_elastic_search_query_sphinx(data);
+    }
+    // MkDocs projects should have this flag explicitly for now.
+    else if (data.features && !data.features.docsearch_disabled) {
+        attach_elastic_search_query_mkdocs(data);
+    } else {
+        console.log('Server side search is disabled.');
+    }
 }
 
 module.exports = {

readthedocs/doc_builder/backends/mkdocs.py

@@ -253,6 +253,12 @@ def generate_rtd_data(self, docs_dir, mkdocs_config):
             'commit': self.version.project.vcs_repo(self.version.slug).commit,
             'global_analytics_code': settings.GLOBAL_ANALYTICS_CODE,
             'user_analytics_code': analytics_code,
+            'features': {
+                'docsearch_disabled': (
+                    not self.project.has_feature(Feature.ENABLE_MKDOCS_SERVER_SIDE_SEARCH)
+                    or self.project.has_feature(Feature.DISABLE_SERVER_SIDE_SEARCH)
+                )
+            },
         }
 
         data_ctx = {

readthedocs/doc_builder/backends/sphinx.py

@@ -181,6 +181,7 @@ def get_config_params(self):
             'dont_overwrite_sphinx_context': self.project.has_feature(
                 Feature.DONT_OVERWRITE_SPHINX_CONTEXT,
             ),
+            'docsearch_disabled': self.project.has_feature(Feature.DISABLE_SERVER_SIDE_SEARCH),
         }
 
         finalize_sphinx_context_data.send(

readthedocs/doc_builder/templates/doc_builder/conf.py.tmpl

@@ -114,6 +114,7 @@ context = {
     'new_theme': (html_theme == "sphinx_rtd_theme"),
     'source_suffix': SUFFIX,
     'ad_free': {% if project.show_advertising %}False{% else %}True{% endif %},
+    'docsearch_disabled': {{ docsearch_disabled }},
     'user_analytics_code': '{{ project.analytics_code|default_if_none:'' }}',
     'global_analytics_code': '{{ settings.GLOBAL_ANALYTICS_CODE }}',
     'commit': {% if project.repo_type == 'git' %}'{{ commit|slice:"8" }}'{% else %}'{{ commit }}'{% endif %},

readthedocs/projects/models.py

@@ -1590,6 +1590,8 @@ def add_features(sender, **kwargs):
     SKIP_SYNC_BRANCHES = 'skip_sync_branches'
     CACHED_ENVIRONMENT = 'cached_environment'
     LIMIT_CONCURRENT_BUILDS = 'limit_concurrent_builds'
+    DISABLE_SERVER_SIDE_SEARCH = 'disable_server_side_search'
+    ENABLE_MKDOCS_SERVER_SIDE_SEARCH = 'enable_mkdocs_server_side_search'
     FORCE_SPHINX_FROM_VENV = 'force_sphinx_from_venv'
     LIST_PACKAGES_INSTALLED_ENV = 'list_packages_installed_env'
     VCS_REMOTE_LISTING = 'vcs_remote_listing'
@@ -1669,6 +1671,14 @@ def add_features(sender, **kwargs):
             LIMIT_CONCURRENT_BUILDS,
             _('Limit the amount of concurrent builds'),
         ),
+        (
+            DISABLE_SERVER_SIDE_SEARCH,
+            _('Disable server side search'),
+        ),
+        (
+            ENABLE_MKDOCS_SERVER_SIDE_SEARCH,
+            _('Enable server side search for MkDocs projects'),
+        ),
         (
             FORCE_SPHINX_FROM_VENV,
             _('Force to use Sphinx from the current virtual environment'),