Merge pull request #2737 from dotCooCoo/fix/export-for-screens-keeps-warnings

Export for Screens: exports warn when an image couldn't be decoded or a font is missing

crates/engine/src/cmd/fileio/mod.rs

@@ -142,7 +142,7 @@ pub fn specs() -> Vec<CommandSpec> {
             "Export for Screens",
             ["File", "Export"],
             None,
-            "{folder?, zip?: false (one store-only .zip of every file: no folder → {name, dataBase64, bytes, files: [name…]}; with a folder it is written there → {path, bytes, files}), artboards?: [index…] | range?: \"1-3\" (default all), assets?: [asset id…] (instead of artboards: each asset's art alone, cropped to its bounds and named after the asset; see assets.list), layers?: [layer id…] (instead of artboards: each layer's art alone, sublayers included, named after the layer), selection?: one|each (instead of artboards: the selected art as one file, or a file per selected object, named after it), fullDocument?: false (one file per format instead: a PDF of every artboard, other formats the bounds of all visible art, named after the document), includeBleed?: false (artboards grown by the document's bleed), exportPreset?: (a preset of document.exportPresets.list: its settings, under these params), subfolders?: false (each row's files in a sub-folder: its folder, else its size for raster (1x, 2x, 100w…) or its format (SVG, PDF)), folders?: none|rows (as subfolders)|format (a folder per extension: png, svg, pdf…)|item (a folder per artboard, asset, layer or object)|itemFormat (item/extension) (default: rows with subfolders or a preset, else none), name?: (a file name pattern instead of the item's name, with <filename> for the document, <name> for the artboard, asset, layer or object, <index> from 1, #### for the counter zero-padded to the run of #, <format>, <scale>, <suffix> (else the row's suffix ends the name), YYYYMMDD, YYYY-MM-DD, YYYY, <date>, <time>, <YYYY>, <MM>, <DD>, <hh>, <mm> and <ss>; a trailing .ext is dropped, as in `COMPANY-Logo-<filename>-####-YYYYMMDD`; different files it names alike get -2, -3…), counterStart?: 1, counterPer?: item (every file of an item has its number)|file, date?: YYYY-MM-DD (the date the pattern uses; default today, UTC), preset?: mobile (PNG 1x, 2x, 3x) | density (PNG 0.75x–4x in ldpi…xxxhdpi sub-folders) instead of formats (turns subfolders on), formats?: [{format: png|png8|jpg|webp|gif|tiff|bmp|tga|psd|svg|svgz|pdf|eps|ai|vectorcraft, scale?: 1 | \"2x\" | \"100w\" | \"100h\" | \"72ppi\", width?: px | height?: px | ppi? (raster only; width, then height, then ppi win over scale), suffix?: (raster default: @2x, @100w, @100h, none at 1x; vector formats drop size suffixes), folder?: (its sub-folder), quality?: (jpg 0–100), …the format's options (antiAlias, background, preset (pdf)…)}], settings?: {png|png8|jpg|webp|gif|tiff|bmp|tga|psd|svg|svgz|pdf|eps|ai|vectorcraft: {…options for every row of that format}} (rows' own options win), prefix?, antiAlias?: none|art|type (raster rows without their own), openLocation?: (remembered; the app shows the files after exporting)} one file per artboard and format (a PDF holds its artboard alone; artboards with the same name, in any case, get -2, -3…; an unnamed one is Artboard-N) → {files: [path…]}; no folder → {files: [{name, dataBase64}]} (names include sub-folders: 2x/Icon@2x.png). eps, ai and vectorcraft rows write a document of the item alone (its one artboard). The params (but zip and assets) are remembered in the document (document.exportSettings; not an undo step)",
+            "{folder?, zip?: false (one store-only .zip of every file: no folder → {name, dataBase64, bytes, files: [name…]}; with a folder it is written there → {path, bytes, files}), artboards?: [index…] | range?: \"1-3\" (default all), assets?: [asset id…] (instead of artboards: each asset's art alone, cropped to its bounds and named after the asset; see assets.list), layers?: [layer id…] (instead of artboards: each layer's art alone, sublayers included, named after the layer), selection?: one|each (instead of artboards: the selected art as one file, or a file per selected object, named after it), fullDocument?: false (one file per format instead: a PDF of every artboard, other formats the bounds of all visible art, named after the document), includeBleed?: false (artboards grown by the document's bleed), exportPreset?: (a preset of document.exportPresets.list: its settings, under these params), subfolders?: false (each row's files in a sub-folder: its folder, else its size for raster (1x, 2x, 100w…) or its format (SVG, PDF)), folders?: none|rows (as subfolders)|format (a folder per extension: png, svg, pdf…)|item (a folder per artboard, asset, layer or object)|itemFormat (item/extension) (default: rows with subfolders or a preset, else none), name?: (a file name pattern instead of the item's name, with <filename> for the document, <name> for the artboard, asset, layer or object, <index> from 1, #### for the counter zero-padded to the run of #, <format>, <scale>, <suffix> (else the row's suffix ends the name), YYYYMMDD, YYYY-MM-DD, YYYY, <date>, <time>, <YYYY>, <MM>, <DD>, <hh>, <mm> and <ss>; a trailing .ext is dropped, as in `COMPANY-Logo-<filename>-####-YYYYMMDD`; different files it names alike get -2, -3…), counterStart?: 1, counterPer?: item (every file of an item has its number)|file, date?: YYYY-MM-DD (the date the pattern uses; default today, UTC), preset?: mobile (PNG 1x, 2x, 3x) | density (PNG 0.75x–4x in ldpi…xxxhdpi sub-folders) instead of formats (turns subfolders on), formats?: [{format: png|png8|jpg|webp|gif|tiff|bmp|tga|psd|svg|svgz|pdf|eps|ai|vectorcraft, scale?: 1 | \"2x\" | \"100w\" | \"100h\" | \"72ppi\", width?: px | height?: px | ppi? (raster only; width, then height, then ppi win over scale), suffix?: (raster default: @2x, @100w, @100h, none at 1x; vector formats drop size suffixes), folder?: (its sub-folder), quality?: (jpg 0–100), …the format's options (antiAlias, background, preset (pdf)…)}], settings?: {png|png8|jpg|webp|gif|tiff|bmp|tga|psd|svg|svgz|pdf|eps|ai|vectorcraft: {…options for every row of that format}} (rows' own options win), prefix?, antiAlias?: none|art|type (raster rows without their own), openLocation?: (remembered; the app shows the files after exporting)} one file per artboard and format (a PDF holds its artboard alone; artboards with the same name, in any case, get -2, -3…; an unnamed one is Artboard-N) → {files: [path…]}; no folder → {files: [{name, dataBase64}]} (names include sub-folders: 2x/Icon@2x.png); every reply has warnings: [the encoders' warnings for the files, each once: an image that couldn't be decoded, type written in the fallback font…]. eps, ai and vectorcraft rows write a document of the item alone (its one artboard). The params (but zip and assets) are remembered in the document (document.exportSettings; not an undo step)",
             has_doc,
             screens::export_for_screens
         ),

crates/engine/src/cmd/fileio/screens.rs

@@ -21,8 +21,8 @@ use super::encode::single_artboard;
 use super::export::{isolated, selected_artwork, without_artboards};
 use super::naming::{self, NameParts};
 use super::{
-    ARTBOARD_PARAMS, ArtboardPick, Format, artboard_file_names, create_dir, distinct_names, encode, unique_file_names, with_black_output, writable,
-    write_file,
+    ARTBOARD_PARAMS, ArtboardPick, Format, artboard_file_names, create_dir, distinct_names, encode_with_warnings, unique_file_names,
+    with_black_output, writable, write_file,
 };
 
 const C: &str = "document.exportForScreens";
@@ -561,7 +561,8 @@ pub(super) fn presets_delete(s: &mut Session, p: &Value) -> Result<Value> {
 /// Every chosen artboard (asset, layer, selected object) in every format row, one file each (a PDF
 /// holds its artboard alone), or with `fullDocument` one file per row (a PDF of every artboard,
 /// else the bounds of all art). Items that share a name get `-2`, `-3`… instead of overwriting, and
-/// so do different files the `name` pattern gives one name.
+/// so do different files the `name` pattern gives one name. The reply's `warnings` lists every
+/// warning the encoders give for the files, each once.
 pub(crate) fn export(s: &mut Session, p: &Value) -> Result<Value> {
     let o = ScreenParams::of(p)?;
     let rows = rows_of(s, p, o.preset.as_deref())?;
@@ -608,8 +609,18 @@ pub(crate) fn export(s: &mut Session, p: &Value) -> Result<Value> {
     let crop = rows.iter().any(|r| r.format.id != "pdf");
     let items = items(&doc, &o, selection, &selected, &filename, crop)?;
     let mut out = Output::default();
+    // The encoders' warnings for every file, each once.
+    let mut warnings: Vec<String> = Vec::new();
     // Appearance of Black › Printing / Exporting for RGB raster rows.
-    let write = |doc: &Document, format: &str, options: &Value| encode(doc, format, &with_black_output(s, options));
+    let mut write = |doc: &Document, format: &str, options: &Value| -> Result<Vec<u8>> {
+        let (bytes, notes) = encode_with_warnings(doc, format, &with_black_output(s, options))?;
+        for w in notes {
+            if !warnings.contains(&w) {
+                warnings.push(w);
+            }
+        }
+        Ok(bytes)
+    };
     // A whole-document copy of an artboard, for the formats that write documents to edit.
     let mut board_docs: std::collections::HashMap<usize, Arc<Document>> = std::collections::HashMap::new();
     let mut files = 0u64;
@@ -669,15 +680,19 @@ pub(crate) fn export(s: &mut Session, p: &Value) -> Result<Value> {
             Some(dir) => {
                 let path = format!("{dir}/{zip_name}");
                 write_file(&path, &zip)?;
-                Ok(json!({ "path": path, "bytes": zip.len(), "files": names }))
+                Ok(json!({ "path": path, "bytes": zip.len(), "files": names, "warnings": warnings }))
             }
-            None => Ok(json!({ "name": zip_name, "dataBase64": vectorcraft_format::base64_encode(&zip), "bytes": zip.len(), "files": names })),
+            None => Ok(
+                json!({ "name": zip_name, "dataBase64": vectorcraft_format::base64_encode(&zip), "bytes": zip.len(), "files": names, "warnings": warnings }),
+            ),
         };
     }
     Ok(match folder {
-        Some(_) => json!({ "files": out.written }),
+        Some(_) => json!({ "files": out.written, "warnings": warnings }),
         None => {
-            json!({ "files": out.kept.iter().map(|(name, bytes)| json!({ "name": name, "dataBase64": vectorcraft_format::base64_encode(bytes) })).collect::<Vec<_>>() })
+            let files: Vec<Value> =
+                out.kept.iter().map(|(name, bytes)| json!({ "name": name, "dataBase64": vectorcraft_format::base64_encode(bytes) })).collect();
+            json!({ "files": files, "warnings": warnings })
         }
     })
 }

crates/engine/src/cmd/fileio/tests_screens.rs

@@ -200,6 +200,45 @@ fn a_zip_is_written_into_the_folder() {
     let _ = std::fs::remove_dir_all(dir);
 }
 
+/// The warnings in `r` that contain `text`.
+fn warned<'a>(r: &'a Value, text: &str) -> Vec<&'a str> {
+    r["warnings"].as_array().unwrap().iter().filter_map(Value::as_str).filter(|w| w.contains(text)).collect()
+}
+
+#[cfg(not(target_arch = "wasm32"))]
+#[test]
+fn every_reply_says_once_when_an_image_could_not_be_decoded() {
+    let mut s = session(1);
+    let rows = json!([{"format": "png"}, {"format": "jpg", "scale": "2x"}]);
+    assert_eq!(export(&mut s, json!({ "formats": rows }))["warnings"], json!([]));
+    // The renderer can't decode the placed image and draws nothing in its place.
+    crate::tests_menucmds::place_undecodable_png(&mut s);
+    let dir = std::env::temp_dir().join(format!("vc-screens-undecoded-{}", std::process::id()));
+    let folder = dir.to_string_lossy().replace(std::path::MAIN_SEPARATOR, "/");
+    for p in [
+        json!({ "formats": rows }),
+        json!({ "formats": rows, "zip": true }),
+        json!({ "formats": rows, "folder": folder }),
+        json!({ "formats": rows, "folder": folder, "zip": true }),
+        json!({ "formats": rows, "fullDocument": true }),
+    ] {
+        let r = export(&mut s, p.clone());
+        assert_eq!(warned(&r, "couldn't be decoded").len(), 1, "{p}: {}", r["warnings"]);
+    }
+    assert_eq!(std::fs::read_dir(&dir).unwrap().count(), 3, "the files are still written");
+    let _ = std::fs::remove_dir_all(dir);
+}
+
+#[test]
+fn type_in_a_missing_family_is_named_once_for_every_format() {
+    let mut s = session(2);
+    s.execute("text.create", &json!({"x": 5, "y": 20, "text": "Ab", "font": "Nonexistent Sans Probe"})).unwrap();
+    let r = export(&mut s, json!({"formats": [{"format": "png"}, {"format": "pdf"}, {"format": "eps"}]}));
+    let fallback = warned(&r, "fallback font");
+    assert_eq!(fallback.len(), 1, "{}", r["warnings"]);
+    assert!(fallback[0].contains("Nonexistent Sans Probe"), "{fallback:?}");
+}
+
 #[test]
 fn full_document_gives_one_file_per_format() {
     let mut s = session(3);

crates/ui-egui/src/dialogs/tests_screens.rs

@@ -249,6 +249,43 @@ fn the_web_downloads_one_zip_or_the_file() {
     assert_eq!(image::load_from_memory(&log[0].1).unwrap().to_rgba8().get_pixel(1, 1).0, [0, 0, 0, 255], "the PNG settings' background");
 }
 
+#[test]
+fn the_status_bar_says_when_an_image_could_not_be_decoded() {
+    const NOTE: &str = "with 1 note(s): an image couldn't be decoded and is missing from the picture";
+    // A PNG whose header reads but whose pixel data is cut short: the renderer draws nothing for it.
+    let mut png = Vec::new();
+    image::RgbaImage::from_pixel(64, 32, image::Rgba([200, 30, 30, 255]))
+        .write_to(&mut std::io::Cursor::new(&mut png), image::ImageFormat::Png)
+        .unwrap();
+    let idat = png.windows(4).position(|w| w == b"IDAT").unwrap();
+    png.truncate(idat + 8);
+    let place = |app: &mut VectorcraftApp| {
+        app.run("file.place", json!({"name": "cut.png", "dataBase64": vectorcraft_format::base64_encode(&png), "at": [10, 10]})).unwrap()
+    };
+    let rows = json!([{"format": "png", "scale": "1x", "suffix": ""}, {"format": "jpg", "scale": "2x", "suffix": "@2x"}]);
+    let dir = temp_folder("undecoded");
+    let folder = dir.to_string_lossy().replace('\\', "/");
+    let (mut desktop, log) = app(1, false);
+    desktop.run("file.exportForScreens", json!({"folder": folder, "formats": rows})).unwrap();
+    assert_eq!(desktop.ui.status, format!("Exported 2 file(s) to {folder}"));
+    place(&mut desktop);
+    desktop.run("file.exportForScreens", json!({"folder": folder, "formats": rows, "openLocation": true})).unwrap();
+    assert_eq!(desktop.ui.status, format!("Saved {folder} {NOTE}"));
+    assert_eq!(log.borrow().len(), 1, "Open Location still shows the first file");
+    let r = desktop.run("file.exportForScreens", json!({"folder": folder, "formats": rows, "zip": true})).unwrap();
+    assert_eq!(desktop.ui.status, format!("Saved {} {NOTE}", r["path"].as_str().unwrap()));
+    // The Asset Export panel's export goes the same way.
+    desktop.run("select.all", json!({})).unwrap();
+    desktop.run("assets.add", json!({"multiple": false})).unwrap();
+    crate::io::export_files(&mut desktop, "assets.export", json!({"folder": folder, "formats": rows})).unwrap();
+    assert_eq!(desktop.ui.status, format!("Saved {folder} {NOTE}"), "assets.export");
+    let (mut web, _) = app(1, true);
+    place(&mut web);
+    web.run("file.exportForScreens", json!({"zip": true, "formats": rows})).unwrap();
+    assert_eq!(web.ui.status, format!("Saved Untitled-1.zip {NOTE}"));
+    let _ = std::fs::remove_dir_all(dir);
+}
+
 #[test]
 fn a_preset_export_reopens_on_its_rows() {
     let (mut app, _) = app(1, true);

crates/ui-egui/src/io.rs

@@ -566,11 +566,16 @@ fn view_file(app: &mut VectorcraftApp, path: &str) {
 
 /// "Saved <path>", with the first of the result's warnings.
 pub(crate) fn report_saved(app: &mut VectorcraftApp, path: &str, r: &Value) {
+    app.status(saved_status(path, r));
+}
+
+/// [`report_saved`]'s message.
+fn saved_status(path: &str, r: &Value) -> String {
     let warnings: Vec<&str> = r["warnings"].as_array().map(|w| w.iter().filter_map(Value::as_str).collect()).unwrap_or_default();
-    app.status(match warnings.first() {
+    match warnings.first() {
         Some(first) => format!("Saved {path} with {} note(s): {first}", warnings.len()),
         None => format!("Saved {path}"),
-    });
+    }
 }
 
 /// Write a planned save through the services and report it in the status bar.
@@ -828,7 +833,9 @@ pub(crate) fn open_in_app(app: &mut VectorcraftApp, path: &str) -> Result<(), St
 
 /// File → Export for Screens with `document.exportForScreens` params: the files go into `folder`;
 /// without one the web downloads them (the ZIP, or each file) and the other frontends get them
-/// back as base64. With `openLocation`, the file manager shows the first file written.
+/// back as base64. With `openLocation`, the file manager shows the first file written. When an
+/// export into a folder or a download has warnings, the status bar shows the first as
+/// [`report_saved`] shows a save's notes: "Saved <folder, ZIP or first download> with n note(s): …".
 pub fn export_for_screens(app: &mut VectorcraftApp, params: Value) -> Result<Value, String> {
     export_files(app, "document.exportForScreens", params)
 }
@@ -839,6 +846,7 @@ pub(crate) fn export_files(app: &mut VectorcraftApp, id: &str, params: Value) ->
     let folder = params.get("folder").and_then(Value::as_str).unwrap_or_default().to_string();
     let r = app.run(id, params)?;
     let count = r["files"].as_array().map_or(0, Vec::len);
+    let warned = r["warnings"].as_array().is_some_and(|w| !w.is_empty());
     // Files that came back as bytes: (name, base64).
     let returned: Vec<(&str, &str)> = match r["dataBase64"].as_str() {
         Some(zip) => vec![(r["name"].as_str().unwrap_or("Export.zip"), zip)],
@@ -849,6 +857,9 @@ pub(crate) fn export_files(app: &mut VectorcraftApp, id: &str, params: Value) ->
     if returned.is_empty() {
         let first = r["path"].as_str().or_else(|| r["files"][0].as_str());
         let mut status = format!("Exported {count} file(s) to {folder}");
+        if warned {
+            status = saved_status(r["path"].as_str().unwrap_or(&folder), &r);
+        }
         if open_location
             && let Some(first) = first
             && let Err(e) = reveal_path(app, first)
@@ -865,7 +876,10 @@ pub(crate) fn export_files(app: &mut VectorcraftApp, id: &str, params: Value) ->
             [(name, _)] => (*name).to_string(),
             files => format!("{} files", files.len()),
         };
-        app.status(format!("Downloaded {what}"));
+        match returned.first().filter(|_| warned) {
+            Some((name, _)) => report_saved(app, name, &r),
+            None => app.status(format!("Downloaded {what}")),
+        }
     }
     Ok(r)
 }

docs/control-protocol.md

@@ -119,7 +119,7 @@ the two can still win that race.
 | `engine.execute` `document.exportForOffice` | `{}` / `{path?, ppi?: 72 \| 150 \| 300, transparent?, artboard?}` | File → Save for Office Documents…: without params opens `saveForOffice` (fields `ppi`, `transparent`, `artboard`; OK picks the file); with params writes the artboard as a PNG (`path`, else a picked file) → `{path}`. Headless it returns `{dataBase64, width, height}` |
 | Native file dialogs | any command with no `path` that needs one (`file.open`, `file.saveAs`, `file.place`, exports…) | on macOS (a sheet on the window) and Linux the dialog doesn't hold the window: the call returns `"cancelled"` at once, `ui.inspect` reports `fileDialog`, and when the person at the computer picks a file the command runs again on the document it was asked for. While it is open another dialog is refused: that call returns `"cancelled"` too, and the status bar (`ui.inspect` → `ui.status`) says `"A file dialog is open: choose there first"`; on macOS `app.quit`, `file.close` and `file.closeAll` return that message and the menu bar does nothing (#592, #867). On Windows the dialog is shown in line: the call returns once it closes. Pass `path` to skip the dialog |
 | Background Save / Export | `app.save`, `app.export {path}`, `file.save`, `file.saveAs`, `file.saveCopy` | with the `backgroundSave` / `backgroundExport` preferences on (the default) the desktop app writes the file from a snapshot on a worker thread: the call returns `{path, background: true, status}` at once, `ui.inspect` lists the jobs still running in `background` (labels such as `"Saving a.vectorcraft"`), and the document counts as saved (as of the snapshot) once its file is written. Quit and Close wait for them. With the preferences off (`prefs.set`), saves return once written |
-| `engine.execute` `file.exportForScreens` | `{}` / `{…document.exportForScreens params}` | without params opens `exportForScreens` on the settings the document last exported with (`document.exportSettings`). While the Artboard tool is in use, the artboards it has selected (its `selected` option, the rows the Artboards panel highlights) are checked instead, and `select` is `range`, or `all` when every artboard is selected. Fields: `tab` (`artboards` \| `assets` \| `layers` \| `selection`; OK reads Export Layer or Export Selection on those), `layers` ([layer id…] checked), `selectionMode` (`one` \| `each`), `name` (the file name pattern of `document.exportForScreens`), `counterStart`, `folders` (`none` \| `rows` \| `format` \| `item` \| `itemFormat`), `exportPreset` (the preset applied last), `__savePreset` (the name typed to save one), `select` (`all` \| `range` \| `full`), `range` ("1-3, 5"), `boards` (a bool per artboard; checking them sets `select` and `range`), `includeBleed`, `folder` (desktop; default the Desktop, else home), `openLocation`, `subfolders`, `prefix`, `preset` (`""` \| `mobile` \| `density`), `formats` (rows `{format, scale: "2x" \| "100w" \| "100h" \| "72ppi", suffix, quality?, folder?}`), `settings` (`{png \| png8 \| jpg \| webp \| gif \| svg \| pdf: {…options}}`, the gear's Format Settings; `__settings` names the format shown). `ui.dialog.confirm` exports (a bad range or no folder keeps it open); on the web OK reads "Download" and the files download (several as one `.zip`). With params it runs `document.exportForScreens`: no `folder` returns the files (or with `zip: true` one store-only zip) as `dataBase64`; with `openLocation` the first file is shown in the file manager |
+| `engine.execute` `file.exportForScreens` | `{}` / `{…document.exportForScreens params}` | without params opens `exportForScreens` on the settings the document last exported with (`document.exportSettings`). While the Artboard tool is in use, the artboards it has selected (its `selected` option, the rows the Artboards panel highlights) are checked instead, and `select` is `range`, or `all` when every artboard is selected. Fields: `tab` (`artboards` \| `assets` \| `layers` \| `selection`; OK reads Export Layer or Export Selection on those), `layers` ([layer id…] checked), `selectionMode` (`one` \| `each`), `name` (the file name pattern of `document.exportForScreens`), `counterStart`, `folders` (`none` \| `rows` \| `format` \| `item` \| `itemFormat`), `exportPreset` (the preset applied last), `__savePreset` (the name typed to save one), `select` (`all` \| `range` \| `full`), `range` ("1-3, 5"), `boards` (a bool per artboard; checking them sets `select` and `range`), `includeBleed`, `folder` (desktop; default the Desktop, else home), `openLocation`, `subfolders`, `prefix`, `preset` (`""` \| `mobile` \| `density`), `formats` (rows `{format, scale: "2x" \| "100w" \| "100h" \| "72ppi", suffix, quality?, folder?}`), `settings` (`{png \| png8 \| jpg \| webp \| gif \| svg \| pdf: {…options}}`, the gear's Format Settings; `__settings` names the format shown). `ui.dialog.confirm` exports (a bad range or no folder keeps it open); on the web OK reads "Download" and the files download (several as one `.zip`). With params it runs `document.exportForScreens`: no `folder` returns the files (or with `zip: true` one store-only zip) as `dataBase64`; with `openLocation` the first file is shown in the file manager. When `warnings` is not empty, an export into a folder or a download shows the first in the status bar as Save As shows a save's notes |
 | Export for Screens' Assets tab, Asset Export panel | `ui.dialog.set` `tab: "assets"`, `assets: [asset id…]`; `window.panel {panel: "assetExport"}` | on the Assets tab of `exportForScreens` the `assets` field lists the checked asset ids (all of them when it opens); `ui.dialog.confirm` runs `document.exportForScreens {assets}` (nothing checked keeps it open) and OK reads "Export Asset". The Asset Export panel acts through `assets.*` and shares the format rows with the dialog (`assets.settings.set`) |
 | `engine.execute` `file.exportSelection` | `{multiple?}` | File › Export Selection…: collects the selected objects as assets (`assets.add`; one per object unless `multiple` is false) and opens `exportForScreens` on its Assets tab with just them checked → `{assets}`. `document.exportSelection` still exports the selection in one go, without the dialog |
 | CSS Properties panel | `window.panel {panel: "cssProperties"}`; `engine.execute` `css.copy` / `css.exportFile` | the panel shows `css.selection` of the selection (after Generate CSS, while nothing is selected, `css.generate`); its menu holds the options the commands take (`units`, `position`, `dimensions`, `unnamed`, `rasterize`). `css.copy {scope?, …options}` copies the CSS to the clipboard → `{css, rules}`; `css.exportFile {path?, scope?, …options}` writes `css.export` to `path` (else a picked file; the web downloads it) with the pictures of rasterized art next to it → `{path, rules, images}` |

docs/mcp.md

@@ -2903,7 +2903,9 @@ format its options. On every platform, `/`, `\`, `:`, `<`, `>`, `"`, `|`, `?`, `
 prefix, a suffix, a name pattern or an item's name become `-` in file and folder names, a folder name ends without
 periods or spaces, and a Windows device name (`CON`, `PRN`, `AUX`, `NUL`, `COM1` to `COM9`, `LPT1` to `LPT9`) that
 is the whole name or comes before its first period gets a `-` after it (`CON-.png`). The document remembers the last
-params: `document.exportSettings`.
+params: `document.exportSettings`. As in `document.export`,
+the reply's `warnings` lists the notes of every file exported (an image that couldn't be decoded, type written in the
+fallback font…), each note once; the export still writes or returns every file.
 
 Batch exports (#1935):
 - **What:** `layers: [id…]` (each layer's art alone) or `selection: "one" | "each"` instead of artboards