fix(html): attach the text editor to a page with no run

CHANGELOG.md

@@ -16,6 +16,12 @@ The release run heads these entries with the version and opens a fresh
 
 ## Unreleased
 
+### Text documents and presentations
+
+- The browser text editor attaches to a page with an addressed paragraph and
+  no run, as a new odt or docx renders. Typing there went nowhere and said
+  nothing.
+
 ## v7.5.1 - 2026-10-10
 
 ### Spreadsheets

src/odr/internal/html/frontend/document.js

@@ -6,9 +6,10 @@
 
   var odr = (window.odr = window.odr || {});
 
-  // A view whose runs carry no address is not this editor's: a sheet's editing
-  // is an overlay, and its cells state no id.
-  if (document.querySelector("x-s[data-odr-id]") === null) {
+  // A view with no addressed paragraph or run is not this editor's: a sheet's
+  // editing is an overlay, and its cells state no id. A new document has one
+  // empty paragraph and no run.
+  if (document.querySelector("x-p[data-odr-id], x-s[data-odr-id]") === null) {
     return;
   }
 

test/browser/text/README.md

@@ -6,6 +6,7 @@ so these checks run by hand and not in `odr_test`.
 ```bash
 test/browser/text/serve          # serves on :8734
 open http://localhost:8734/tests.html
+open http://localhost:8734/empty.html
 ```
 
 `serve` serves `document.css`, `editing.js`, `document.js` and `search.js` out
@@ -14,6 +15,10 @@ so the checks run the file the library embeds. `editing.js` goes first, as the
 library writes it. `error-codes.js` is built from `src/odr/error_code.{hpp,cpp}`
 by `test/browser/serve.py`.
 
+`empty.html` is a new document: one addressed paragraph and no run. The
+editor decides on load whether a page is its own, so that shape needs a page
+of its own.
+
 `tests.html` holds the shapes the editor handles: two runs beside each other,
 a run under a link, a run under a style-only wrapper, a paragraph with a
 picture and no run, and the `<wbr>` / `<br>` line box the renderer ends every

test/browser/text/empty.html

@@ -0,0 +1,83 @@
+<!doctype html>
+<html>
+  <head>
+    <meta charset="utf-8" />
+    <title>text editing checks: an empty document</title>
+    <link rel="stylesheet" href="document.css" />
+  </head>
+  <body
+    class="odr-body"
+    data-odr-editable="true"
+    data-odr-keyboard="navigation shortcuts"
+  >
+    <!-- A new document as `create_document` makes one and `translate` writes
+         it: one paragraph with an address, no run, and the `<br>` line box of
+         an empty paragraph. The editor decides on load whether the page is
+         its own, so this needs a page of its own. -->
+    <div class="odr-text-flow" id="flow">
+      <x-p data-odr-id="2" style="display:block"><br></x-p>
+    </div>
+
+    <div id="out" contenteditable="false"><div id="report"></div></div>
+    <script src="error-codes.js"></script>
+    <script src="editing.js"></script>
+    <script src="document.js"></script>
+    <script src="checks.js"></script>
+    <script>
+      var refusals = [];
+      odr.onEditRefused = function (event) {
+        refusals.push(event.reason + " " + event.code);
+      };
+
+      var paragraph = document.querySelector('x-p[data-odr-id="2"]');
+      function ops() {
+        return JSON.parse(odr.editing.getOperations()).ops;
+      }
+      function input(type, data) {
+        var before = refusals.length;
+        var event = new InputEvent("beforeinput", {
+          inputType: type,
+          data: data,
+          bubbles: true,
+          cancelable: true,
+        });
+        document.body.dispatchEvent(event);
+        return refusals.length > before ? "refused" : "taken";
+      }
+
+      note("an empty document");
+      check("the mode turns on", odr.editing.enable() === true);
+      check(
+        "the text editor attached",
+        document.body.getAttribute("contenteditable") === "true"
+      );
+
+      var range = document.createRange();
+      range.setStart(paragraph, 0);
+      window.getSelection().removeAllRanges();
+      window.getSelection().addRange(range);
+      check("typing is taken", input("insertText", "Hello") === "taken", refusals);
+      check("the paragraph holds it", paragraph.textContent === "Hello");
+      check(
+        "in a run of its own",
+        paragraph.querySelector("x-s[data-odr-id]") !== null &&
+          paragraph.querySelector("x-s[data-odr-id]").textContent === "Hello"
+      );
+      check(
+        "which the log states by its parent",
+        ops().length === 1 &&
+          ops()[0].op === "insertText" &&
+          ops()[0].parent === 2 &&
+          ops()[0].text === "Hello",
+        ops()
+      );
+      check(
+        "the line box is a wbr now",
+        paragraph.lastChild.nodeName === "WBR",
+        paragraph.lastChild.nodeName
+      );
+      odr.editing.undo();
+      check("undo empties it again", paragraph.textContent === "" && ops().length === 0);
+    </script>
+  </body>
+</html>

test/browser/text/serve

@@ -9,4 +9,4 @@ sys.path.insert(0, str(HERE.parent))
 
 from serve import serve  # noqa: E402
 
-serve(8734, HERE, ("tests.html",))
+serve(8734, HERE, ("tests.html", "empty.html"))