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Create a ChromeBrowserHostImpl for every Chrome tab (see issue #2969)

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The Browser object represents the top-level Chrome browser window. One or more
tabs (WebContents) are then owned by the Browser object via TabStripModel. A
new Browser object can be created programmatically using "new Browser" or
Browser::Create, or as a result of user action such as dragging a tab out of an
existing window. New or existing tabs can also be added to an already existing
Browser object.

The Browser object acts as the WebContentsDelegate for all attached tabs. CEF
integration requires WebContentsDelegate callbacks and notification of tab
attach/detach. To support this integration we add a cef::BrowserDelegate
(ChromeBrowserDelegate) member that is created in the Browser constructor and
receives delegation for the Browser callbacks. ChromeBrowserDelegate creates a
new ChromeBrowserHostImpl when a tab is added to a Browser for the first time,
and that ChromeBrowserHostImpl continues to exist until the tab's WebContents
is destroyed. The associated WebContents object does not change, but the
Browser object will change when the tab is dragged between windows.

CEF callback logic is shared between the chrome and alloy runtimes where
possible. This shared logic has been extracted from CefBrowserHostImpl to
create new CefBrowserHostBase and CefBrowserContentsDelegate classes. The
CefBrowserHostImpl class is now only used with the alloy runtime and will be
renamed to AlloyBrowserHostImpl in a future commit.
This commit is contained in:
Marshall Greenblatt
2020-09-17 18:24:08 -04:00
parent 7ca9e9c54b
commit 38d8acfa18
52 changed files with 3138 additions and 1603 deletions
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20
libcef_dll/cpptoc/browser_process_handler_cpptoc.cc
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@ -9,10 +9,11 @@
// implementations. See the translator.README.txt file in the tools directory
// for more information.
//
// $hash=7f01f5096df081ae224560eefba57b45fb9c758b$
// $hash=94217ee1df26d037136df93adda612261606c569$
//
#include "libcef_dll/cpptoc/browser_process_handler_cpptoc.h"
#include "libcef_dll/cpptoc/client_cpptoc.h"
#include "libcef_dll/cpptoc/print_handler_cpptoc.h"
#include "libcef_dll/ctocpp/command_line_ctocpp.h"
@ -81,6 +82,22 @@ void CEF_CALLBACK browser_process_handler_on_schedule_message_pump_work(
delay_ms);
}
struct _cef_client_t* CEF_CALLBACK browser_process_handler_get_default_client(
struct _cef_browser_process_handler_t* self) {
// AUTO-GENERATED CONTENT - DELETE THIS COMMENT BEFORE MODIFYING
DCHECK(self);
if (!self)
return NULL;
// Execute
CefRefPtr<CefClient> _retval =
CefBrowserProcessHandlerCppToC::Get(self)->GetDefaultClient();
// Return type: refptr_same
return CefClientCppToC::Wrap(_retval);
}
} // namespace
// CONSTRUCTOR - Do not edit by hand.
@ -93,6 +110,7 @@ CefBrowserProcessHandlerCppToC::CefBrowserProcessHandlerCppToC() {
GetStruct()->get_print_handler = browser_process_handler_get_print_handler;
GetStruct()->on_schedule_message_pump_work =
browser_process_handler_on_schedule_message_pump_work;
GetStruct()->get_default_client = browser_process_handler_get_default_client;
}
// DESTRUCTOR - Do not edit by hand.