Enhance/pdf improvements (#6475)

Full-text search, highlights and assets alias support 
It also exposes a plugin API for highlight context menu   
    ```ts
    /**
       * Current it's only available for pdf viewer
       * @param label - displayed name of command
       * @param action - callback for the clickable item
       * @param opts - clearSelection: clear highlight selection when callback invoked
       */
      registerHighlightContextMenuItem: (
        label: string,
        action: SimpleCommandCallback,
        opts?: {
          clearSelection: boolean
        }
      ) => unknown
    ```

src/main/frontend/extensions/pdf/utils.cljs

@@ -3,14 +3,30 @@
             [cljs-bean.core :as bean]
             [frontend.util :as util]
             ["/frontend/extensions/pdf/utils" :as js-utils]
-            [frontend.db :as db]
-            [frontend.loader :refer [load]]
+            [datascript.core :as d]
+            [logseq.graph-parser.config :as gp-config]
             [clojure.string :as string]))
 
 (defonce MAX-SCALE 5.0)
 (defonce MIN-SCALE 0.25)
 (defonce DELTA_SCALE 1.05)
 
+(defn clean-asset-path-prefix
+  [path]
+  (when (string? path)
+    (string/replace-first path #"^[.\/\\]*(assets)[\/\\]+" "")))
+
+(defn get-area-block-asset-url
+  [block page]
+  (when-some [props (and block page (:block/properties block))]
+    (when-some [uuid (:block/uuid block)]
+      (when-some [stamp (:hl-stamp props)]
+        (let [group-key      (string/replace-first (:block/original-name page) #"^hls__" "")
+              hl-page        (:hl-page props)
+              encoded-chars? (boolean (re-find #"(?i)%[0-9a-f]{2}" group-key))
+              group-key      (if encoded-chars? (js/encodeURI group-key) group-key)]
+          (str "./" gp-config/local-assets-dir "/" group-key "/" (str hl-page "_" uuid "_" stamp ".png")))))))
+
 (defn get-bounding-rect
   [rects]
   (bean/->clj (js-utils/getBoundingRect (bean/->js rects))))
@@ -115,23 +131,12 @@
     (mapv #(if (map? %) % (bean/->clj %)) its)))
 
 (defn gen-uuid []
-  (db/new-block-id))
-
-(defn js-load$
-  [url]
-  (p/create
-    (fn [resolve]
-      (load url resolve))))
-
-(def PDFJS_ROOT
-  (if (= js/location.protocol "file:")
-    "./js"
-    "./static/js"))
+  (d/squuid))
 
 (defn load-base-assets$
   []
-  (p/let [_ (js-load$ (str PDFJS_ROOT "/pdfjs/pdf.js"))
-          _ (js-load$ (str PDFJS_ROOT "/pdfjs/pdf_viewer.js"))]))
+  (p/let [_ (util/js-load$ (str util/JS_ROOT "/pdfjs/pdf.js"))
+          _ (util/js-load$ (str util/JS_ROOT "/pdfjs/pdf_viewer.js"))]))
 
 (defn get-page-from-el
   [^js/HTMLElement el]
@@ -181,6 +186,13 @@
     (js-invoke js/window.lsPdfViewer "previousPage")
     (catch :default _e nil)))
 
+(defn open-finder
+  []
+  (try
+    (when-let [^js el (js/document.querySelector ".extensions__pdf-toolbar a[title=Search]")]
+      (.click el))
+    (catch js/Error _e nil)))
+
 (comment
  (fix-selection-text-breakline "this is a\ntest paragraph")
  (fix-selection-text-breakline "he is 1\n8 years old")