support url on createTarget and send lifecycle events

Support url parameter on createTarget. we now navigate on createTarget
to dispatch events correctly, even in case of about:blank

Author: krichprollsch

src/Notification.zig

@@ -109,13 +109,13 @@ pub const PageRemove = struct {};
 
 pub const PageNavigate = struct {
     timestamp: u64,
-    url: []const u8,
+    url: [:0]const u8,
     opts: Page.NavigateOpts,
 };
 
 pub const PageNavigated = struct {
     timestamp: u64,
-    url: []const u8,
+    url: [:0]const u8,
 };
 
 pub const PageNetworkIdle = struct {

src/browser/Page.zig

@@ -63,7 +63,7 @@ const timestamp = @import("../datetime.zig").timestamp;
 const milliTimestamp = @import("../datetime.zig").milliTimestamp;
 
 pub threadlocal var current: *Page = undefined;
-var default_url = URL{ ._raw = "about/blank" };
+var default_url = URL{ ._raw = "about:blank" };
 pub var default_location: Location = Location{ ._url = &default_url };
 
 pub const BUF_SIZE = 1024;
@@ -201,7 +201,7 @@ fn reset(self: *Page, comptime initializing: bool) !void {
     self._factory = Factory.init(self);
 
     self.version = 0;
-    self.url = "about/blank";
+    self.url = "about:blank";
 
     self.document = (try self._factory.document(Node.Document.HTMLDocument{ ._proto = undefined })).asDocument();
 

src/cdp/domains/page.zig

@@ -19,6 +19,7 @@
 const std = @import("std");
 const Page = @import("../../browser/Page.zig");
 const Notification = @import("../../Notification.zig");
+const timestampF = @import("../../datetime.zig").timestamp;
 
 const Allocator = std.mem.Allocator;
 
@@ -47,7 +48,7 @@ pub fn processMessage(cmd: anytype) !void {
 const Frame = struct {
     id: []const u8,
     loaderId: []const u8,
-    url: []const u8,
+    url: [:0]const u8,
     domainAndRegistry: []const u8 = "",
     securityOrigin: []const u8,
     mimeType: []const u8 = "text/html",
@@ -82,11 +83,36 @@ fn setLifecycleEventsEnabled(cmd: anytype) !void {
     })) orelse return error.InvalidParams;
 
     const bc = cmd.browser_context orelse return error.BrowserContextNotLoaded;
-    if (params.enabled) {
-        try bc.lifecycleEventsEnable();
-    } else {
+
+    if (params.enabled == false) {
         bc.lifecycleEventsDisable();
+        return cmd.sendResult(null, .{});
     }
+
+    // Enable lifecycle events.
+    try bc.lifecycleEventsEnable();
+
+    // When we enable lifecycle events, we must dispatch events for all
+    // attached targets.
+    const page = bc.session.currentPage() orelse return error.PageNotLoaded;
+
+    if (page._load_state == .complete) {
+        const now = timestampF(.monotonic);
+        const http_client = page._session.browser.http_client;
+
+        try sendPageLifecycle(bc, "DOMContentLoaded", now);
+        try sendPageLifecycle(bc, "load", now);
+
+        const http_active = http_client.active;
+        const total_network_activity = http_active + http_client.intercepted;
+        if (page._notified_network_almost_idle.check(total_network_activity <= 2)) {
+            try sendPageLifecycle(bc, "networkAlmostIdle", now);
+        }
+        if (page._notified_network_idle.check(total_network_activity == 0)) {
+            try sendPageLifecycle(bc, "networkIdle", now);
+        }
+    }
+
     return cmd.sendResult(null, .{});
 }
 

src/cdp/domains/target.zig

@@ -109,7 +109,7 @@ fn disposeBrowserContext(cmd: anytype) !void {
 
 fn createTarget(cmd: anytype) !void {
     const params = (try cmd.params(struct {
-        // url: []const u8,
+        url: [:0]const u8 = "about:blank",
         // width: ?u64 = null,
         // height: ?u64 = null,
         browserContextId: ?[]const u8 = null,
@@ -168,7 +168,7 @@ fn createTarget(cmd: anytype) !void {
         .targetInfo = TargetInfo{
             .attached = false,
             .targetId = target_id,
-            .title = "about:blank",
+            .title = params.url,
             .browserContextId = bc.id,
             .url = "about:blank",
         },
@@ -179,6 +179,10 @@ fn createTarget(cmd: anytype) !void {
         try doAttachtoTarget(cmd, target_id);
     }
 
+    try page.navigate(params.url, .{
+        .reason = .address_bar,
+    });
+
     try cmd.sendResult(.{
         .targetId = target_id,
     }, .{});
@@ -518,7 +522,7 @@ test "cdp.target: createTarget" {
     {
         var ctx = testing.context();
         defer ctx.deinit();
-        try ctx.processMessage(.{ .id = 10, .method = "Target.createTarget", .params = .{ .url = "about/blank" } });
+        try ctx.processMessage(.{ .id = 10, .method = "Target.createTarget", .params = .{ .url = "about:blank" } });
 
         // should create a browser context
         const bc = ctx.cdp().browser_context.?;
@@ -530,7 +534,7 @@ test "cdp.target: createTarget" {
         defer ctx.deinit();
         // active auto attach to get the Target.attachedToTarget event.
         try ctx.processMessage(.{ .id = 9, .method = "Target.setAutoAttach", .params = .{ .autoAttach = true, .waitForDebuggerOnStart = false } });
-        try ctx.processMessage(.{ .id = 10, .method = "Target.createTarget", .params = .{ .url = "about/blank" } });
+        try ctx.processMessage(.{ .id = 10, .method = "Target.createTarget", .params = .{ .url = "about:blank" } });
 
         // should create a browser context
         const bc = ctx.cdp().browser_context.?;