M11: PDF Optimizer can discard form submission, import and reset actions (optimize.discard-form-actions)

crates/automation/src/documents.rs

@@ -356,6 +356,7 @@ impl Automation {
             ("discard_alternate_images", &mut settings.discard_alternate_images),
             ("discard_tags", &mut settings.discard_tags),
             ("discard_print_settings", &mut settings.discard_print_settings),
+            ("discard_form_actions", &mut settings.discard_form_actions),
             ("flate_unencoded", &mut settings.flate_unencoded),
             ("object_streams", &mut settings.object_streams),
             ("lzw_to_flate", &mut settings.lzw_to_flate),
@@ -416,6 +417,8 @@ impl Automation {
             "thumbnails": o.thumbnails,
             "alternate_images": o.alternate_images,
             "tags_removed": o.tags_removed,
+            "print_settings": o.print_settings,
+            "form_actions": o.form_actions,
             "streams_compressed": o.streams_compressed,
             "lzw_streams": o.lzw_streams,
             "invalid_links": o.invalid_links,

crates/automation/src/tools.rs

@@ -1517,7 +1517,7 @@ pub fn tools() -> Vec<ToolDef> {
             .with(schema(json!({ "doc": doc() }), &["doc"])),
         t("doc_open_revision", "Open a revision", "Open saved revision `revision` (1 = the oldest) of a document as a new, unsaved document, to see the file as it was then.")
             .with(schema(json!({ "doc": doc(), "revision": { "type": "integer", "minimum": 1 } }), &["doc", "revision"])),
-        t("doc_optimize", "Optimize PDF", "Write an optimized copy to `path` (Acrobat's PDF Optimizer). preset: standard (default; Reduce File Size's choices) or mobile (images to 96 ppi above 144, JPEG high quality); the options below change it. compatibility: retain (default; keeps the document's version, or 1.5 when object streams are written), 1.4, 1.5, 1.6, 1.7 or 2.0. merge_fragments (default true) first puts a page picture drawn as many stacked image strips (as some PDF printers write it) back together into one image, so it can be resampled (merged_images, fragments_merged). color / gray: { downsample, ppi, above_ppi, compression: jpeg|zip|retain, quality 1–100 } (defaults: downsample to 150 ppi above 225, JPEG 60). mono: { downsample, ppi, above_ppi, compression: ccitt_g4|jbig2|retain } for black-and-white images and image masks (default: averaged down to 300 ppi above 450 ppi, counted in images_resampled; stored losslessly as CCITT Group 4 or JBIG2 (or 1-bit Flate, once resampled or packed from more bits) when that is smaller, up to 16 JBIG2 images sharing one symbol dictionary (/JBIG2Globals) where that is smaller still (image masks and DeviceGray images named directly, of at most 64 Mi pixels, which redaction can store again without it), Group 3 fax images, JBIG2 images, black-and-white RGB and indexed images using only palette entries 0 and 1 among them, counted in images_recompressed; retain resamples only, a CCITT image staying CCITT, a JBIG2 image JBIG2 and any other becoming Flate). Images past what one run may decode stay as they are, counted in images_refused; streams it only stores with Flate past that stay LZW, uncounted. Images are measured where pages draw them and replaced only when smaller. discard_*: thumbnails (default true), alternate_images (true), tags, print_settings; flate_unencoded (true); object_streams (default true; always off for 1.4); lzw_to_flate (true) decodes LZW streams and stores them with Flate instead, leaving any it cannot decode unchanged (lzw_streams counts the streams converted); remove_invalid_links and remove_unreferenced_dests (true); images and forms the pages list but never draw are always dropped (unused_xobjects). discard: Remove Hidden Information categories (metadata, attachments, comments, form-fields, hidden-text, hidden-layers, bookmarks, links-actions-scripts, private-data). Signed documents are refused. The open document is unchanged.")
+        t("doc_optimize", "Optimize PDF", "Write an optimized copy to `path` (Acrobat's PDF Optimizer). preset: standard (default; Reduce File Size's choices) or mobile (images to 96 ppi above 144, JPEG high quality); the options below change it. compatibility: retain (default; keeps the document's version, or 1.5 when object streams are written), 1.4, 1.5, 1.6, 1.7 or 2.0. merge_fragments (default true) first puts a page picture drawn as many stacked image strips (as some PDF printers write it) back together into one image, so it can be resampled (merged_images, fragments_merged). color / gray: { downsample, ppi, above_ppi, compression: jpeg|zip|retain, quality 1–100 } (defaults: downsample to 150 ppi above 225, JPEG 60). mono: { downsample, ppi, above_ppi, compression: ccitt_g4|jbig2|retain } for black-and-white images and image masks (default: averaged down to 300 ppi above 450 ppi, counted in images_resampled; stored losslessly as CCITT Group 4 or JBIG2 (or 1-bit Flate, once resampled or packed from more bits) when that is smaller, up to 16 JBIG2 images sharing one symbol dictionary (/JBIG2Globals) where that is smaller still (image masks and DeviceGray images named directly, of at most 64 Mi pixels, which redaction can store again without it), Group 3 fax images, JBIG2 images, black-and-white RGB and indexed images using only palette entries 0 and 1 among them, counted in images_recompressed; retain resamples only, a CCITT image staying CCITT, a JBIG2 image JBIG2 and any other becoming Flate). Images past what one run may decode stay as they are, counted in images_refused; streams it only stores with Flate past that stay LZW, uncounted. Images are measured where pages draw them and replaced only when smaller. discard_*: thumbnails (default true), alternate_images (true), tags, print_settings (entries removed: print_settings), form_actions (submit, import and reset actions removed: form_actions; the fields and links stay, and the actions chained after one still run); flate_unencoded (true); object_streams (default true; always off for 1.4); lzw_to_flate (true) decodes LZW streams and stores them with Flate instead, leaving any it cannot decode unchanged (lzw_streams counts the streams converted); remove_invalid_links and remove_unreferenced_dests (true); images and forms the pages list but never draw are always dropped (unused_xobjects). discard: Remove Hidden Information categories (metadata, attachments, comments, form-fields, hidden-text, hidden-layers, bookmarks, links-actions-scripts, private-data). Signed documents are refused. The open document is unchanged.")
             .cmd("optimize.advanced")
             .with(schema(
                 json!({
@@ -1533,6 +1533,7 @@ pub fn tools() -> Vec<ToolDef> {
                     "discard_alternate_images": { "type": "boolean" },
                     "discard_tags": { "type": "boolean" },
                     "discard_print_settings": { "type": "boolean" },
+                    "discard_form_actions": { "type": "boolean" },
                     "flate_unencoded": { "type": "boolean" },
                     "object_streams": { "type": "boolean" },
                     "lzw_to_flate": { "type": "boolean" },

crates/automation/tests/it/automation.rs

@@ -6771,6 +6771,32 @@ fn optimizing_through_tools() {
     assert!(matches!(a.call("doc_optimize", &json!({ "doc": doc, "path": "x.pdf", "discard": ["everything"] })), Err(ToolError::InvalidArgs(_))));
 }
 
+#[test]
+fn optimizing_discards_form_actions_through_tools() {
+    let dir = workdir("optimize-form-actions");
+    let mut a = auto(&dir);
+    let doc = ok(&mut a, "doc_open", json!({ "path": "a.pdf" }))["doc"].as_u64().unwrap();
+    ok(&mut a, "form_add_field", json!({ "doc": doc, "page": 1, "type": "button", "rect": [20, 20, 120, 42], "name": "Send" }));
+    ok(
+        &mut a,
+        "form_set_actions",
+        json!({ "doc": doc, "field": "Send", "actions": [
+            { "trigger": "mouse_up", "submit": "https://example.com/submit" },
+            { "trigger": "mouse_down", "reset": [] },
+            { "trigger": "mouse_enter", "javascript": "app.alert(1);" }
+        ] }),
+    );
+    let kept = ok(&mut a, "doc_optimize", json!({ "doc": doc, "path": "kept.pdf" }));
+    assert_eq!(kept["form_actions"], 0, "{kept}");
+    let r = ok(&mut a, "doc_optimize", json!({ "doc": doc, "path": "small.pdf", "discard_form_actions": true }));
+    assert_eq!(r["form_actions"], 2, "{r}");
+    let small = ok(&mut a, "doc_open", json!({ "path": "small.pdf" }))["doc"].as_u64().unwrap();
+    let fields = ok(&mut a, "form_fields", json!({ "doc": small }));
+    assert!(fields.to_string().contains("Send"), "the button stays: {fields}");
+    let actions = ok(&mut a, "form_actions", json!({ "doc": small, "field": "Send" }));
+    assert_eq!(actions["actions"], json!([{ "trigger": "mouse_enter", "javascript": "app.alert(1);" }]), "{actions}");
+}
+
 /// #3227 review: retaining the version, a catalog `/Version` below the 1.5 an object stream
 /// needs is not what viewers read: the header is raised, and the later of the two is reported.
 #[test]

crates/optimize/README.md

@@ -118,7 +118,10 @@ let report = optimize_with_progress(&mut doc, &settings, &mut |stage| keep_going
     1,000 scanned pages' worth, plus more for each byte of the file, enough to decode a stream
     about 8 times at Flate's best. Images past it stay as they are, and `Report::images_refused`
     counts those the image step read. Streams it only stores with Flate (below) aren't counted.
-- **Discard objects:** thumbnails, alternate images, document tags, print settings.
+- **Discard objects:** thumbnails, alternate images, document tags, print settings, and form
+  submission, import and reset actions (`/SubmitForm`, `/ImportData`, `/ResetForm`, off by
+  default). The fields, links, bookmarks and pages that ran a removed action keep their other
+  actions, and the actions chained after it through `/Next` still run in order.
 - **Clean up:** Flate for streams with no filter; for streams with an outer ASCII85 or ASCIIHex
   layer, that layer is removed when the result is smaller (the inner filters keep their encoded
   bytes; streams with `/DecodeParms`, images and object streams keep their ASCII layer. LZW-compressed