From 3e52abf47146ce2914d848555b14b9d46fc8389b Mon Sep 17 00:00:00 2001
From: Pierre Tachoire <pierre@lightpanda.io>
Date: Mon, 29 Dec 2025 10:53:41 +0100
Subject: [PATCH] cdp: add input.insertText

---
 src/browser/Page.zig      | 31 +++++++++++++++++++++++++++++++
 src/cdp/domains/input.zig | 16 ++++++++++++++++
 2 files changed, 47 insertions(+)

diff --git a/src/browser/Page.zig b/src/browser/Page.zig
index 37f92b57..cbda9900 100644
--- a/src/browser/Page.zig
+++ b/src/browser/Page.zig
@@ -2571,6 +2571,37 @@ pub fn submitForm(self: *Page, submitter_: ?*Element, form_: ?*Element.Html.Form
     return self.scheduleNavigation(action, opts, .form);
 }
 
+// insertText is a shortcut to insert text into the active element.
+pub fn insertText(self: *Page, v: []const u8) !void {
+    const html_element = self.document._active_element orelse return;
+
+    if (html_element.is(Element.Html.Input)) |input| {
+        const input_type = input._input_type;
+        if (input_type == .radio or input_type == .checkbox) {
+            return;
+        }
+
+        // If the input is selected, replace the existing value
+        if (input._selected) {
+            const new_value = try self.arena.dupe(u8, v);
+            try input.setValue(new_value, self);
+            input._selected = false;
+            return;
+        }
+
+        // Or append the value
+        const current_value = input.getValue();
+        const new_value = try std.mem.concat(self.arena, u8, &.{ current_value, v });
+        try input.setValue(new_value, self);
+    }
+
+    if (html_element.is(Element.Html.TextArea)) |textarea| {
+        const current_value = textarea.getValue();
+        const new_value = try std.mem.concat(self.arena, u8, &.{ current_value, v });
+        try textarea.setValue(new_value, self);
+    }
+}
+
 const RequestCookieOpts = struct {
     is_http: bool = true,
     is_navigation: bool = false,
diff --git a/src/cdp/domains/input.zig b/src/cdp/domains/input.zig
index 777f7049..f97ee123 100644
--- a/src/cdp/domains/input.zig
+++ b/src/cdp/domains/input.zig
@@ -22,11 +22,13 @@ pub fn processMessage(cmd: anytype) !void {
     const action = std.meta.stringToEnum(enum {
         dispatchKeyEvent,
         dispatchMouseEvent,
+        insertText,
     }, cmd.input.action) orelse return error.UnknownMethod;
 
     switch (action) {
         .dispatchKeyEvent => return dispatchKeyEvent(cmd),
         .dispatchMouseEvent => return dispatchMouseEvent(cmd),
+        .insertText => return insertText(cmd),
     }
 }
 
@@ -101,6 +103,20 @@ fn dispatchMouseEvent(cmd: anytype) !void {
     // result already sent
 }
 
+// https://chromedevtools.github.io/devtools-protocol/tot/Input/#method-insertText
+fn insertText(cmd: anytype) !void {
+    const params = (try cmd.params(struct {
+        text: []const u8, // The text to insert
+    })) orelse return error.InvalidParams;
+
+    const bc = cmd.browser_context orelse return;
+    const page = bc.session.currentPage() orelse return;
+
+    try page.insertText(params.text);
+
+    try cmd.sendResult(null, .{});
+}
+
 fn clickNavigate(cmd: anytype, uri: std.Uri) !void {
     const bc = cmd.browser_context.?;