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Optimise the search context extractor, but evediently there's more work to be done.
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5 changed files with 77 additions and 94 deletions
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@ -21,6 +21,9 @@ This file holds the changelog for Pepperminty Wiki. This is the master list of t
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- Added `password_cost`, `password_cost_time`, and `password_cost_time_interval` settings
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- `password_cost` is recalculated automatically every week by default (it keeps track of this via the `password_cost_time_lastcheck` 'setting')
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- The `css` setting will now keep a value of auto, even when `peppermint.json` is automatically updated by _Pepperminty Wiki_.
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- Optimised the search context extractor.
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- Tuned the default value for `search_characters_context` down to 75 (this won't be the case for existing wikis, so you'll need to adjust it manually)
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- Added new `search_characters_context_total` setting to control the maximum characters in a search context
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## v0.16
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_(No changes since v0.16-beta1)_
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@ -172,7 +172,8 @@ $guiConfig = <<<'GUICONFIG'
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"max_preview_size": {"type": "number", "description": "The maximum allowed size of generated preview images in pixels.", "default": 2048},
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"avatars_show": {"type": "checkbox", "description": "Whether or not to show avatars requires the 'user-preferences' and 'upload' modules, though uploads themselvess can be turned off so long as all avatars have already been uploaded - it's only the 'preview' action that's actually used.", "default": true},
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"avatars_size": {"type": "number", "description": "The image size to render avatars at. Does not affect the size they're stored at - only the inline rendered size (e.g. on the recent changes page etc.)", "default": 32},
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"search_characters_context": {"type": "number", "description": "The number of characters that should be displayed either side of a matching term in the context below each search result.", "default": 200},
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"search_characters_context": {"type": "number", "description": "The number of characters that should be displayed either side of a matching term in the context below each search result.", "default": 75},
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"search_characters_context_total": {"type": "number", "description": "The total number of characters that a search result context should display at most.", "default": 250},
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"search_title_matches_weighting": {"type": "number", "description": "The weighting to give to search term matches found in a page's title.", "default": 10},
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"search_tags_matches_weighting": {"type": "number", "description": "The weighting to give to search term matches found in a page's tags.", "default": 3},
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"dynamic_page_suggestion_count": {"type": "number", "description": "The number of dynamic page name suggestions to fetch from the server when typing in the page search box. Note that lowering this number doesn't <em>really</em> improve performance. Set to 0 to disable.", "default": 7 },
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@ -396,7 +397,7 @@ if($settings->sessionprefix == "auto")
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/////////////////////////////////////////////////////////////////////////////
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/** The version of Pepperminty Wiki currently running. */
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$version = "v0.17-dev";
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$commit = "49b91aa6f999409dbcf6d165f379ebb95fec7dcb";
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$commit = "93494b672938d2fb456138e03db5be3803bc51b7";
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/// Environment ///
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/** Holds information about the current request environment. */
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$env = new stdClass();
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@ -4433,6 +4434,7 @@ class search
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if(isset($invindex[$qterm]))
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{
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// Loop over each page in the inverted index entry
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reset($invindex); // Reset array/object pointer
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foreach($invindex[$qterm] as $pageid => $page_entry)
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{
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// Create an entry in the matching pages array if it doesn't exist
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@ -4444,6 +4446,7 @@ class search
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// Loop over the pageindex and search the titles / tags
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reset($pageindex); // Reset array/object pointer
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foreach ($pageindex as $pagename => $pagedata)
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{
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// Get the current page's id
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@ -4565,9 +4568,7 @@ class search
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if($all_offsets === false)
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continue;
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foreach($all_offsets as $offset)
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{
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$matches[] = [ $nterm, $offset ];
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}
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}
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// Sort the matches by offset
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@ -4579,58 +4580,47 @@ class search
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$sourceLength = mb_strlen($source);
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$contexts = [];
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$basepos = 0;
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$matches_count = count($matches);
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while($basepos < $matches_count)
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{
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// Store the next match along - all others will be relative to that one
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$group = [$matches[$basepos]];
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$total_context_length = 0;
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for($i = 0; $i < $matches_count; $i++) {
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$next_context = [
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"from" => max(0, $matches[$i][1] - $settings->search_characters_context),
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"to" => min($sourceLength, $matches[$i][1] + count($matches[0]) + $settings->search_characters_context)
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];
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// Start scanning at the next one along - we always store the first match
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$scanpos = $basepos + 1;
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$distance = 0;
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while(true)
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{
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// Break out if we reach the end
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if($scanpos >= $matches_count) break;
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if(end($contexts) !== false && end($contexts)["to"] > $next_context["from"]) {
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// This next context overlaps with the previous one
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// Extend the last one instead of adding a new one
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// Find the distance between the current one and the last one
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$distance = $matches[$scanpos][1] - $matches[$scanpos - 1][1];
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// The array pointer is pointing at the last element now because we called end() above
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// Store it if the distance is below the threshold
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if($distance < $settings->search_characters_context)
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$group[] = $matches[$scanpos];
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else
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break;
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$scanpos++;
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// Update the total context length counter appropriately
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$total_context_length += $next_context["to"] - $contexts[key($contexts)]["to"];
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$contexts[key($contexts)]["to"] = $next_context["to"];
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}
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else { // No overlap here! Business as usual.
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$contexts[] = $next_context;
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// Update the total context length counter as normal
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$total_context_length += $next_context["to"] - $next_context["from"];
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}
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$context_start = $group[0][1] - $settings->search_characters_context;
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$context_end = $group[count($group) - 1][1] + $settings->search_characters_context;
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if($context_start < 0) $context_start = 0;
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if($context_end > $sourceLength) $context_end = $sourceLength;
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//echo("Got context. Start: $context_start, End: $context_end\n");
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//echo("Group:"); var_dump($group);
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$context = substr($source, $context_start, $context_end - $context_start);
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// Strip the markdown from the context - it's most likely going to
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// be broken anyway.
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//$context = self::strip_markup($context);
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// Escape special characters to protect against attacks
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$context = htmlentities($context);
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$contexts[] = $context;
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$basepos = $scanpos + 1;
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end($contexts);
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$last_context = &$contexts[key($contexts)];
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if($total_context_length > $settings->search_characters_context_total) {
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// We've reached the limit on the number of characters this context should contain. Trim off the context to fit and break out
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$last_context["to"] -= $total_context_length - $settings->search_characters_context_total;
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break;
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}
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}
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return implode(" ... ", $contexts);
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$contexts_text = [];
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foreach($contexts as $context) {
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$contexts_text[] = substr($source, $context["from"], $context["to"] - $context["from"]);
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}
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return implode(" ... ", $contexts_text);
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}
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/**
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@ -104,7 +104,7 @@
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"author": "Starbeamrainbowlabs",
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"description": "Adds proper search functionality to Pepperminty Wiki using an inverted index to provide a full text search engine. If pages don't show up, then you might have hit a stop word. If not, try requesting the `invindex-rebuild` action to rebuild the inverted index from scratch.",
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"id": "feature-search",
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"lastupdate": 1529964034,
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"lastupdate": 1529967930,
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"optional": false
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},
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{
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@ -790,6 +790,7 @@ class search
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if(isset($invindex[$qterm]))
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{
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// Loop over each page in the inverted index entry
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reset($invindex); // Reset array/object pointer
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foreach($invindex[$qterm] as $pageid => $page_entry)
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{
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// Create an entry in the matching pages array if it doesn't exist
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@ -801,6 +802,7 @@ class search
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// Loop over the pageindex and search the titles / tags
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reset($pageindex); // Reset array/object pointer
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foreach ($pageindex as $pagename => $pagedata)
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{
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// Get the current page's id
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@ -922,9 +924,7 @@ class search
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if($all_offsets === false)
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continue;
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foreach($all_offsets as $offset)
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{
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$matches[] = [ $nterm, $offset ];
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}
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}
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// Sort the matches by offset
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@ -936,58 +936,47 @@ class search
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$sourceLength = mb_strlen($source);
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$contexts = [];
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$basepos = 0;
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$matches_count = count($matches);
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while($basepos < $matches_count)
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{
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// Store the next match along - all others will be relative to that one
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$group = [$matches[$basepos]];
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$total_context_length = 0;
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for($i = 0; $i < $matches_count; $i++) {
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$next_context = [
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"from" => max(0, $matches[$i][1] - $settings->search_characters_context),
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"to" => min($sourceLength, $matches[$i][1] + count($matches[0]) + $settings->search_characters_context)
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];
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// Start scanning at the next one along - we always store the first match
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$scanpos = $basepos + 1;
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$distance = 0;
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while(true)
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{
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// Break out if we reach the end
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if($scanpos >= $matches_count) break;
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if(end($contexts) !== false && end($contexts)["to"] > $next_context["from"]) {
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// This next context overlaps with the previous one
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// Extend the last one instead of adding a new one
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// Find the distance between the current one and the last one
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$distance = $matches[$scanpos][1] - $matches[$scanpos - 1][1];
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// The array pointer is pointing at the last element now because we called end() above
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// Store it if the distance is below the threshold
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if($distance < $settings->search_characters_context)
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$group[] = $matches[$scanpos];
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else
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break;
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$scanpos++;
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// Update the total context length counter appropriately
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$total_context_length += $next_context["to"] - $contexts[key($contexts)]["to"];
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$contexts[key($contexts)]["to"] = $next_context["to"];
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}
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else { // No overlap here! Business as usual.
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$contexts[] = $next_context;
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// Update the total context length counter as normal
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$total_context_length += $next_context["to"] - $next_context["from"];
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}
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$context_start = $group[0][1] - $settings->search_characters_context;
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$context_end = $group[count($group) - 1][1] + $settings->search_characters_context;
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if($context_start < 0) $context_start = 0;
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if($context_end > $sourceLength) $context_end = $sourceLength;
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//echo("Got context. Start: $context_start, End: $context_end\n");
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//echo("Group:"); var_dump($group);
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$context = substr($source, $context_start, $context_end - $context_start);
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// Strip the markdown from the context - it's most likely going to
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// be broken anyway.
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//$context = self::strip_markup($context);
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// Escape special characters to protect against attacks
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$context = htmlentities($context);
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$contexts[] = $context;
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$basepos = $scanpos + 1;
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end($contexts);
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$last_context = &$contexts[key($contexts)];
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if($total_context_length > $settings->search_characters_context_total) {
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// We've reached the limit on the number of characters this context should contain. Trim off the context to fit and break out
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$last_context["to"] -= $total_context_length - $settings->search_characters_context_total;
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break;
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}
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}
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return implode(" ... ", $contexts);
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$contexts_text = [];
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foreach($contexts as $context) {
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$contexts_text[] = substr($source, $context["from"], $context["to"] - $context["from"]);
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}
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return implode(" ... ", $contexts_text);
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}
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/**
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@ -149,7 +149,8 @@
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"max_preview_size": {"type": "number", "description": "The maximum allowed size of generated preview images in pixels.", "default": 2048},
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"avatars_show": {"type": "checkbox", "description": "Whether or not to show avatars requires the 'user-preferences' and 'upload' modules, though uploads themselvess can be turned off so long as all avatars have already been uploaded - it's only the 'preview' action that's actually used.", "default": true},
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"avatars_size": {"type": "number", "description": "The image size to render avatars at. Does not affect the size they're stored at - only the inline rendered size (e.g. on the recent changes page etc.)", "default": 32},
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"search_characters_context": {"type": "number", "description": "The number of characters that should be displayed either side of a matching term in the context below each search result.", "default": 200},
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"search_characters_context": {"type": "number", "description": "The number of characters that should be displayed either side of a matching term in the context below each search result.", "default": 75},
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"search_characters_context_total": {"type": "number", "description": "The total number of characters that a search result context should display at most.", "default": 250},
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"search_title_matches_weighting": {"type": "number", "description": "The weighting to give to search term matches found in a page's title.", "default": 10},
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"search_tags_matches_weighting": {"type": "number", "description": "The weighting to give to search term matches found in a page's tags.", "default": 3},
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"dynamic_page_suggestion_count": {"type": "number", "description": "The number of dynamic page name suggestions to fetch from the server when typing in the page search box. Note that lowering this number doesn't <em>really</em> improve performance. Set to 0 to disable.", "default": 7 },
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