Re-added remove() feature from bad merge

packages/perspective-jupyterlab/src/ts/index.ts

@@ -31,6 +31,7 @@ const PSP_CONTAINER_CLASS = 'jp-PSPContainer';
 
 interface PerspectiveSpec {
     data: string,
+    schema: string,
     layout: string,
     config: string;
 }
@@ -46,6 +47,7 @@ export class RenderedPSP extends Widget implements IRenderMime.IRenderer {
         let psp = (<any>(this.node.querySelector('perspective-viewer')));
 
         let layout = JSON.parse(this._lyt);
+
         for(let key in layout){
             if(layout[key]){
                 if(key !== 'view'){
@@ -56,8 +58,13 @@ export class RenderedPSP extends Widget implements IRenderMime.IRenderer {
             }
         }
 
+        if (this._schema !== '') {
+            let schema = JSON.parse(this._schema);
+            psp.load(schema);
+        }
+
         if (this._datatype === 'static') {
-            psp.load(this._data);
+            psp.update(this._data);
         } else if (this._datatype === 'ws' || this._datatype === 'wss') {
             let config = JSON.parse(this._config);
             let send = config.send || '';
@@ -111,8 +118,9 @@ export class RenderedPSP extends Widget implements IRenderMime.IRenderer {
     }
 
     renderModel(model: IRenderMime.IMimeModel): Promise<void> {
-        const {data, layout, config} = model.data[MIME_TYPE] as any | PerspectiveSpec;
+        const {data, schema, layout, config} = model.data[MIME_TYPE] as any | PerspectiveSpec;
         this._lyt = layout;
+        this._schema = schema;
 
         try {
             this._data = JSON.parse(data) as object;
@@ -156,6 +164,7 @@ export class RenderedPSP extends Widget implements IRenderMime.IRenderer {
     private _data: object;
     private _datatype: string;
     private _datasrc: string;
+    private _schema: string;
     private _lyt: string; // not widget layout
     private _config: string;
     private _loaded: boolean;

packages/perspective/src/cpp/main.cpp

@@ -503,7 +503,8 @@ make_table(
     val j_data,
     t_uint32 offset,
     t_str index,
-    t_bool is_arrow
+    t_bool is_arrow,
+    t_bool is_delete
 ) {
     // Create the input and port schemas
     t_svec colnames = vecFromJSArray<std::string>(j_colnames);
@@ -518,8 +519,13 @@ make_table(
     _fill_data(tbl, colnames, j_data, dtypes, offset, is_arrow);
 
     // Set up pkey and op columns
-    auto op_col = tbl->add_column("psp_op", DTYPE_UINT8, false);
-    op_col->raw_fill<t_uint8>(OP_INSERT);
+    if (is_delete) {
+        auto op_col = tbl->add_column("psp_op", DTYPE_UINT8, false);
+        op_col->raw_fill<t_uint8>(OP_DELETE);
+    } else {
+        auto op_col = tbl->add_column("psp_op", DTYPE_UINT8, false);
+        op_col->raw_fill<t_uint8>(OP_INSERT);
+    }
 
     if (index == "")
     {

packages/perspective/src/js/perspective.js

@@ -1071,7 +1071,7 @@ table.prototype.update = function (data) {
     try {
         tbl = __MODULE__.make_table(pdata.row_count || 0, 
             pdata.names, pdata.types, pdata.cdata,
-            this.gnode.get_table().size(), this.index || "", pdata.is_arrow);
+            this.gnode.get_table().size(), this.index || "", pdata.is_arrow, false);
 
         // Add any computed columns
         this._calculate_computed(tbl, this.computed);
@@ -1089,6 +1089,48 @@ table.prototype.update = function (data) {
     }
 }
 
+/**
+ * Removes the rows of a {@link table}.  Removed rows are pushed down to any
+ * derived {@link view} objects.
+ *
+ * @param {Array<Object>} data An array of primary keys to remove.
+ *
+ * @see {@link table}
+ */
+table.prototype.remove = function (data) {
+    let pdata;
+    let cols = this._columns();
+    let schema = this.gnode.get_tblschema();
+    let types = schema.types();
+
+    data = data.map(idx => ({[this.index]: idx}));
+
+    if (data instanceof ArrayBuffer) {
+        pdata = load_arrow_buffer(data, [this.index], types);
+    }
+    else {
+        pdata = parse_data(data, [this.index], types);
+    }
+
+    let tbl;
+    try {
+        tbl = __MODULE__.make_table(pdata.row_count || 0, 
+            pdata.names, pdata.types, pdata.cdata,
+            this.gnode.get_table().size(), this.index || "", pdata.is_arrow, true);
+
+        __MODULE__.fill(this.pool, this.gnode, tbl);
+        this.initialized = true;
+    } catch (e) {
+        console.error(e);
+    } finally {
+        if (tbl) {
+            tbl.delete();
+        }
+        schema.delete();
+        types.delete();
+    }
+}
+
 /**
  * Create a new table with the addition of new computed columns (defined as javascript functions)
  */
@@ -1403,7 +1445,7 @@ const perspective = {
             // Fill t_table with data
             tbl = __MODULE__.make_table(pdata.row_count || 0,
                 pdata.names, pdata.types, pdata.cdata,
-                0, options.index, pdata.is_arrow);
+                0, options.index, pdata.is_arrow, false);
 
             gnode = __MODULE__.make_gnode(tbl);
             pool.register_gnode(gnode);

packages/perspective/src/js/perspective.parallel.js

@@ -160,6 +160,8 @@ table.prototype.delete = async_queue('delete', "table_method");
 
 table.prototype.on_delete = subscribe('on_delete', 'table_method', true);
 
+table.prototype.remove = async_queue('remove', "table_method");
+
 table.prototype.update = function(data) {
     return new Promise( (resolve, reject) => {
         this._worker.handlers[++this._worker.msg_id] = {resolve, reject};

packages/perspective/test/js/updates.js

@@ -50,6 +50,30 @@ var arrow_indexed_result = [
 
 module.exports = (perspective) => {
 
+
+    describe("Removes", function() {
+
+        it("after an `update()`", async function () {
+            var table = perspective.table(meta, {index: "x"});
+            table.update(data);
+            var view = table.view();
+            table.remove([1, 2]);
+            let result = await view.to_json();
+            expect(result.length).toEqual(2);
+            expect(data.slice(2, 4)).toEqual(result);
+        });
+
+        it("after an regular data load`", async function () {
+            var table = perspective.table(data, {index: "x"});
+            var view = table.view();
+            table.remove([1, 2]);
+            let result = await view.to_json();
+            expect(result.length).toEqual(2);
+            expect(data.slice(2, 4)).toEqual(result);
+        });
+
+    });
+
     describe("Updates", function() {
 
         it("Meta constructor then `update()`", async function () {