Enable start center in Emscripten build

...and let it open with that instead of with a hard-coded example.odt.  (But
keep that example.odt in CustomTarget,static_emscripten_fs_image and adapt the
example code in static/README.wasm.md to explicitly load it now.)

Change-Id: Ie43e3795e44542acba5a8e755f65acc56fa753f8
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/171019
Reviewed-by: Stephan Bergmann <stephan.bergmann@allotropia.de>
Tested-by: Jenkins

2 files changed, 19 insertions, 5 deletions

diff --git a/static/README.wasm.md b/static/README.wasm.md
index a28a23efac67..4cf0688d0796 100644
--- a/static/README.wasm.md
+++ b/static/README.wasm.md
@@ -182,7 +182,15 @@ Some usage examples through javascript of the current implementation:
 // inserts a string at the start of the Writer document.
 Module.uno_init.then(function() {
     const css = Module.uno.com.sun.star;
-    const xModel = Module.getCurrentModelFromViewSh();
+    let xModel = Module.getCurrentModelFromViewSh();
+    if (xModel === null || !css.text.XTextDocument.query(xModel)) {
+        const desktop = css.frame.Desktop.create(Module.getUnoComponentContext());
+        const args = new Module.uno_Sequence_com$sun$star$beans$PropertyValue(
+            0, Module.uno_Sequence.FromSize);
+        xModel = css.frame.XComponentLoader.query(desktop).loadComponentFromURL(
+            'file:///android/default-document/example.odt', '_default', 0, args);
+        args.delete();
+    }
     const xTextDocument = css.text.XTextDocument.query(xModel);
     const xText = xTextDocument.getText();
     const xTextCursor = xText.createTextCursor();
@@ -194,7 +202,15 @@ Module.uno_init.then(function() {
 // changes each paragraph of the Writer document to a random color.
 Module.uno_init.then(function() {
     const css = Module.uno.com.sun.star;
-    const xModel = Module.getCurrentModelFromViewSh();
+    let xModel = Module.getCurrentModelFromViewSh();
+    if (xModel === null || !css.text.XTextDocument.query(xModel)) {
+        const desktop = css.frame.Desktop.create(Module.getUnoComponentContext());
+        const args = new Module.uno_Sequence_com$sun$star$beans$PropertyValue(
+            0, Module.uno_Sequence.FromSize);
+        xModel = css.frame.XComponentLoader.query(desktop).loadComponentFromURL(
+            'file:///android/default-document/example.odt', '_default', 0, args);
+        args.delete();
+    }
     const xTextDocument = css.text.XTextDocument.query(xModel);
     const xText = xTextDocument.getText();
     const xEnumAccess = css.container.XEnumerationAccess.query(xText);
diff --git a/static/emscripten/soffice_args.js b/static/emscripten/soffice_args.js
index 6881741bdf0b..7656c7edee7e 100644
--- a/static/emscripten/soffice_args.js
+++ b/static/emscripten/soffice_args.js
@@ -2,7 +2,5 @@
 
 Module['arguments'] = [
     '--norestore',
-    '--nologo',
-    '--writer',
-    '/android/default-document/example.odt'
+    '--nologo'
 ];