Merge pull request #4 from awesome-panel/enhancement/decimal-seperator

Support decimal seperator

mkdocs.yml

@@ -48,7 +48,7 @@ markdown_extensions:
             kwds:
               type: panel
               requirements: |
-                panel-copy-paste>=0.0.2
+                panel-copy-paste>=0.0.3
               link_text: |
                 ►  Run
     - admonition

pixi.toml

@@ -24,6 +24,7 @@ pytest-cov = "*"
 mypy = "*"
 pandas = ">=2.2.3,<3"
 polars = ">=1.14.0,<2"
+pyarrow = "*"
 [feature.test.tasks]
 test = "pytest"
 test-coverage = "pytest --cov=panel_copy_paste --cov-report=xml --cov-report=term-missing"

src/panel_copy_paste/_copy_button.py

@@ -52,7 +52,6 @@ class CopyButton(pn.custom.JSComponent):
 
       if (model.decimal_separator === null) {
         model.decimal_separator = getDecimalSeparator();
-        console.log("set")
       }
 
       model.on("_data", (e)=>{

src/panel_copy_paste/_paste_button.py

@@ -22,7 +22,8 @@ def read_csv(self, data: str) -> "pd.DataFrame":
 
     if not data:
         return pd.DataFrame()
-    return pd.read_csv(StringIO(data), sep="\t", header=None)
+    decimal = self.decimal_separator or "."
+    return pd.read_csv(StringIO(data), sep="\t", decimal=decimal)
 
 
 class PasteButtonBase(pn.custom.JSComponent):
@@ -130,6 +131,37 @@ class PasteToDataFrameButton(PasteButtonBase):
 
     """
 
+    _esm = """
+    function getDecimalSeparator(locale) {
+        const numberWithDecimalSeparator = 1.1;
+        return Intl.NumberFormat(locale)
+            .formatToParts(numberWithDecimalSeparator)
+            .find(part => part.type === 'decimal')
+            .value;
+    }
+
+    export function render({ model, el }) {
+      const button = model.get_child("button")
+      el.appendChild(button)
+
+      if (model._decimal_separator === null) {
+        model.decimal_separator = getDecimalSeparator();
+      }
+
+      button.addEventListener('click', (event) => {
+            navigator.clipboard.readText()
+            .then(pastedData => {
+                if (model.data==pastedData){
+                    model.data=pastedData + " ";
+                } else {
+                    model.data = pastedData;
+                }
+            })
+
+        });
+    }
+    """
+
     value = param.DataFrame(doc="""The value from the clip board as a Pandas DataFrame.""")
     button = pn.custom.Child(constant=True, doc="""A custom Button or ButtonIcon to use.""")
     target = param.Parameter(
@@ -138,4 +170,9 @@ class PasteToDataFrameButton(PasteButtonBase):
         allow_refs=False,
     )
 
+    decimal_separator = param.Selector(
+        default=None,
+        objects=[None, ".", ","],
+        doc="""The decimal symbol used when transforming a DataFrame. If not provided set to the decimal symbol of the client.""",
+    )
     _transform_func = read_csv

tests/test_paste_button.py

@@ -26,8 +26,8 @@ def test_paste_csv_input():
     assert not widget.value
     assert not target.value
     # When
-    widget.data = """1\t2\t3\t4"""
+    widget.data = "x\n1.1\n2.2\n"
     # Then
-    expected = pd.DataFrame([{0: 1, 1: 2, 2: 3, 3: 4}])
+    expected = pd.DataFrame({"x": [1.1, 2.2]})
     pd.testing.assert_frame_equal(widget.value, expected)
     pd.testing.assert_frame_equal(widget.value, target.value)