feat: select all for code inputs

This enable the "select all" feature for `input.select-all` element.
input elements are used because these are the only one with the
`select()` method.
To obtain the same rendering as before the readonly attribute and the
class `code` have been added to these elements.

@vincent-peugnet: make sure to use this element for future select-all

Closes #107

1 files changed, 21 insertions, 0 deletions

diff --git a/src/fn/fn.js b/src/fn/fn.js
index bca4eaf..a5aa538 100644
--- a/src/fn/fn.js
+++ b/src/fn/fn.js
@@ -28,3 +28,24 @@ export function closeSubmenus(e) {
         }
     }
 }
+
+/**
+ * Select the whole content of the clicked item.
+ * @param {MouseEvent} e
+ */
+function selectAll(e) {
+    if (e.target instanceof HTMLInputElement) {
+        e.target.select();
+        e.target.focus();
+    }
+}
+
+/**
+ * Activate "select all" feature for `input.select-all` elements.
+ */
+export function activateSelectAll() {
+    let selectAllInputs = document.querySelectorAll('input.select-all');
+    for (const selectAllInput of selectAllInputs) {
+        selectAllInput.addEventListener('click', selectAll);
+    }
+}