add translatable ariaLabel to block dropdown items

docs/defining-blocks.md

@@ -106,7 +106,7 @@ parameter = string
 * each `field` is mapped to a field name on the block.
 * the function parameters are mapped to the `$parameter` argument with an identical name. The loader automatically builds a mapping between the block field names and the function names.
 * the block will automatically switch to external inputs (wrapping) when there are four or more parameters.
-* the `|` indicates where to start a new line if the block is in external inputs mode. 
+* the `|` indicates where to start a new line if the block is in external inputs mode.
 
 ## Custom block localization
 
@@ -124,11 +124,12 @@ For example,
 export function square(x: number): number {}
 ```
 
-You can also override the ``jsdoc`` description and parameter info.
+You can also override the ``jsdoc`` description, parameter info, and ariaLabel (for dropdown values).
 
 ```
 jsdoc.loc.LOCALE = translated jsdoc
 PARAM.loc.LOCALE = parameter jsdoc
+ariaLabel.loc.LOCALE = translated aria label
 ```
 
 ```typescript-ignore
@@ -141,6 +142,14 @@ PARAM.loc.LOCALE = parameter jsdoc
 //% jsdoc.loc.fr="Calcule le carré de x"
 //% x.loc.fr="le nombre"
 export function square(x: number): number {}
+
+
+export enum MyEnum {
+    //% block="x"
+    //% ariaLabel="x axis"
+    //% ariaLabel.loc.fr="axe des x"
+    X
+}
 ```
 
 
@@ -339,14 +348,16 @@ Enum is supported and will automatically be represented by a dropdown in blocks.
 enum Button {
     A = 1,
     B = 2,
-    //% blockId="ApB" block="A+B"
+    //% block="A+B" ariaLabel="A and B"
     AB = 3,
 }
 ```
 
 * the initializer can be used to map the value
-* the `blockId` attribute can be used to override the block id
 * the `block` attribute can be used to override the rendered string
+* the `ariaLabel` attribute can be used to override the aria label on the dropdown value if the `block` value is not read correctly by screen readers
+
+The `block` and `ariaLabel` values can both be localized, either by including a strings JSON file or locally in the comments (see custom block localization section above).
 
 ### Tip: dropdown for non-enum parameters
 

localtypings/pxtarget.d.ts

@@ -980,6 +980,7 @@ declare namespace ts.pxtc {
         enumIsHash?: boolean; // if true, the name of the enum is normalized, then hashed to generate the value
         enumPromptHint?: string; // The hint that will be displayed in the member creation prompt
         enumInitialMembers?: string[]; // The initial enum values which will be given the lowest values available
+        ariaLabel?: string; // The aria label for the enum value if the screen reader text should differ from the block value in dropdown items
 
         /* end enum-only attributes */
 
@@ -1017,6 +1018,7 @@ declare namespace ts.pxtc {
         _untranslatedBlock?: string; // The block definition before it was translated
         _untranslatedJsDoc?: string // the jsDoc before it was translated
         _untranslatedParamDefl?: pxt.Map<string>; // the parameter defaults before they were translated
+        _untranslatedAriaLabel?: string; // the aria label before it was translated
         _translatedLanguageCode?: string // the language this block has been translated into
         _shadowOverrides?: pxt.Map<string>;
         jsDoc?: string;

pxtblocks/loader.ts

@@ -538,7 +538,8 @@ function initBlock(block: Blockly.Block, info: pxtc.BlocksInfo, fn: pxtc.SymbolI
                                     height: 36,
                                     value: v.name
                                 } : k,
-                                v.namespace + "." + v.name
+                                v.namespace + "." + v.name,
+                                v.attributes.ariaLabel
                             ];
                         });
                         // if a value is provided, move it first

pxtcompiler/emitter/service.ts

@@ -366,6 +366,10 @@ namespace ts.pxtc {
                     }
                 }
             }
+
+            if (si.attributes.ariaLabel) {
+                locStrings[`${si.qName}|ariaLabel`] = si.attributes.ariaLabel;
+            }
         }
         const mapLocs = (m: pxt.Map<string>, name: string) => {
             if (!options.locs) return;
@@ -385,6 +389,7 @@ namespace ts.pxtc {
         if (options.locs)
             enumMembers.forEach(em => {
                 if (em.attributes.block) locStrings[`${em.qName}|block`] = em.attributes.block;
+                if (em.attributes.ariaLabel) locStrings[`${em.qName}|ariaLabel`] = em.attributes.ariaLabel;
                 if (em.attributes.jsDoc) locStrings[em.qName] = em.attributes.jsDoc;
             });
         mapLocs(locStrings, "");

pxtlib/service.ts

@@ -706,6 +706,7 @@ namespace ts.pxtc {
         const langLower = lang.toLowerCase();
         const attrJsLocsKey = langLower + "|jsdoc";
         const attrBlockLocsKey = langLower + "|block";
+        const attrAriaLabelLocsKey = langLower + "|ariaLabel";
 
         const loc = await mainPkg.localizationStringsAsync(lang);
         if (apiLocalizationStrings)
@@ -717,7 +718,8 @@ namespace ts.pxtc {
             const altLocSrcFn = altLocSrc && apis.byQName[altLocSrc];
 
             if (fn.attributes._untranslatedJsDoc) fn.attributes.jsDoc = fn.attributes._untranslatedJsDoc;
-            if (fn.attributes._untranslatedBlock) fn.attributes.jsDoc = fn.attributes._untranslatedBlock;
+            if (fn.attributes._untranslatedBlock) fn.attributes.block = fn.attributes._untranslatedBlock;
+            if (fn.attributes._untranslatedAriaLabel) fn.attributes.ariaLabel = fn.attributes._untranslatedAriaLabel;
             if (fn.attributes._untranslatedParamDefl) {
                 fn.attributes.paramDefl = U.clone(fn.attributes._untranslatedParamDefl);
                 syncParameterDefaults(fn);
@@ -747,6 +749,7 @@ namespace ts.pxtc {
 
             const nsDoc = loc['{id:category}' + Util.capitalize(fn.qName)];
             let locBlock = loc[`${fn.qName}|block`] || fn.attributes.locs?.[attrBlockLocsKey];
+            const locAriaLabel = loc[`${fn.qName}|ariaLabel`] || fn.attributes.locs?.[attrAriaLabelLocsKey];
 
             if (fn.attributes.block) {
                 const comp = pxt.blocks.compileInfo(fn);
@@ -848,6 +851,13 @@ namespace ts.pxtc {
             } else {
                 updateBlockDef(fn.attributes);
             }
+
+            if (locAriaLabel) {
+                if (!fn.attributes._untranslatedAriaLabel) {
+                    fn.attributes._untranslatedAriaLabel = fn.attributes.ariaLabel;
+                }
+                fn.attributes.ariaLabel = locAriaLabel;
+            }
             fn.attributes._translatedLanguageCode = lang;
         });
 
@@ -990,6 +1000,9 @@ namespace ts.pxtc {
                     } else if (U.startsWith(n, "jsdoc.loc.")) {
                         if (!res.locs) res.locs = {};
                         res.locs[n.slice("jsdoc.loc.".length).toLowerCase() + "|jsdoc"] = v;
+                    } else if (U.startsWith(n, "ariaLabel.loc.")) {
+                        if (!res.locs) res.locs = {};
+                        res.locs[n.slice("ariaLabel.loc.".length).toLowerCase() + "|ariaLabel"] = v;
                     } else if (U.contains(n, ".loc.")) {
                         if (!res.locs) res.locs = {};
                         const p = n.slice(0, n.indexOf('.loc.'));

webapp/src/compiler.ts

@@ -837,6 +837,11 @@ function cleanApiForCache(apiInfo: pxtc.SymbolInfo) {
         delete cachedAttrs._untranslatedJsDoc;
         defChanged = true;
     }
+    if (cachedAttrs._untranslatedAriaLabel) {
+        cachedAttrs.ariaLabel = cachedAttrs._untranslatedAriaLabel;
+        delete cachedAttrs._untranslatedAriaLabel;
+        defChanged = true;
+    }
     if (defChanged) {
         ts.pxtc.updateBlockDef(cachedAttrs);
     }