update

ts_web/elements/00group-media/dees-pdf-viewer/styles.ts

@@ -276,6 +276,7 @@ export const viewerStyles = [
       border-radius: 4px;
       overflow: hidden;
       display: inline-block;
+      position: relative;
     }
 
     .page-canvas {
@@ -284,6 +285,48 @@ export const viewerStyles = [
       image-rendering: crisp-edges;
     }
 
+    /* Text layer for selection */
+    .text-layer {
+      position: absolute;
+      inset: 0;
+      overflow: clip;
+      line-height: 1;
+      text-size-adjust: none;
+      forced-color-adjust: none;
+      transform-origin: 0 0;
+      z-index: 1;
+    }
+
+    .text-layer span,
+    .text-layer br {
+      color: transparent;
+      position: absolute;
+      white-space: pre;
+      cursor: text;
+      transform-origin: 0% 0%;
+    }
+
+    .text-layer ::selection {
+      background: rgba(0, 100, 200, 0.3);
+    }
+
+    .text-layer br::selection {
+      background: transparent;
+    }
+
+    .text-layer .endOfContent {
+      display: block;
+      position: absolute;
+      inset: 100% 0 0;
+      z-index: 0;
+      cursor: default;
+      user-select: none;
+    }
+
+    .text-layer.selecting .endOfContent {
+      top: 0;
+    }
+
     .pdf-viewer.with-sidebar .viewer-main {
       margin-left: 0;
     }