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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/views/frame/multi_contents_view_delegate.h"
#include "chrome/browser/sessions/session_service.h"
#include "chrome/browser/sessions/session_service_factory.h"
#include "chrome/browser/ui/browser.h"
#include "chrome/browser/ui/tabs/split_tab_metrics.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/ui/tabs/tab_strip_model_delegate.h"
#include "chrome/browser/ui/views/frame/multi_contents_drop_target_view.h"
#include "components/tabs/public/split_tab_data.h"
#include "components/tabs/public/split_tab_visual_data.h"
MultiContentsViewDelegateImpl::MultiContentsViewDelegateImpl(Browser& browser)
: browser_(browser), tab_strip_model_(*browser.tab_strip_model()) {}
void MultiContentsViewDelegateImpl::WebContentsFocused(
content::WebContents* web_contents) {
int tab_index = tab_strip_model_->GetIndexOfWebContents(web_contents);
if (tab_index != TabStripModel::kNoTab) {
tab_strip_model_->ActivateTabAt(tab_index);
}
}
void MultiContentsViewDelegateImpl::ReverseWebContents() {
const int active_index = tab_strip_model_->active_index();
const std::optional<split_tabs::SplitTabId> split_tab_id =
tab_strip_model_->GetTabAtIndex(active_index)->GetSplit();
CHECK(split_tab_id.has_value());
tab_strip_model_->ReverseTabsInSplit(split_tab_id.value());
}
void MultiContentsViewDelegateImpl::ResizeWebContents(double start_ratio,
bool done_resizing) {
const std::optional<split_tabs::SplitTabId> split_tab_id =
tab_strip_model_->GetActiveTab()->GetSplit();
CHECK(split_tab_id.has_value());
tab_strip_model_->UpdateSplitRatio(split_tab_id.value(), start_ratio);
if (done_resizing) {
const split_tabs::SplitTabId split_id =
tab_strip_model_->GetActiveTab()->GetSplit().value();
SessionService* const session_service =
SessionServiceFactory::GetForProfile(browser_->profile());
if (!session_service) {
return;
}
const split_tabs::SplitTabVisualData* visual_data =
tab_strip_model_->GetSplitData(split_id)->visual_data();
session_service->SetSplitTabData(browser_->session_id(), split_id,
visual_data);
}
}
void MultiContentsViewDelegateImpl::HandleLinkDrop(
MultiContentsDropTargetView::DropSide side,
const std::vector<GURL>& urls) {
CHECK(!urls.empty());
CHECK(!tab_strip_model_->GetActiveTab()->IsSplit());
// Insert the tab before or after the active tab, according to the drop side.
const int new_tab_idx =
tab_strip_model_->active_index() +
(side == MultiContentsDropTargetView::DropSide::START ? 0 : 1);
// TODO(crbug.com/406792273): Support entrypoint for horizontal splits.
const split_tabs::SplitTabVisualData split_data(
split_tabs::SplitTabLayout::kVertical);
// We currently only support creating a split with one link; i.e., the first
// link in the provided list.
tab_strip_model_->delegate()->AddTabAt(urls.front(), new_tab_idx,
/*foreground=*/true);
// Create a split with the previously active tab, which should be before or
// after the newly created tab.
tab_strip_model_->AddToNewSplit(
{new_tab_idx +
(side == MultiContentsDropTargetView::DropSide::START ? 1 : -1)},
split_data, split_tabs::SplitTabCreatedSource::kDragAndDropLink);
}
void MultiContentsViewDelegateImpl::HandleTabDrop(
MultiContentsDropTargetView::DropSide side,
TabDragDelegate::DragController& drag_controller) {
CHECK(!tab_strip_model_->GetActiveTab()->IsSplit());
// TODO(crbug.com/406792273): Support entrypoint for horizontal splits.
const split_tabs::SplitTabVisualData split_data(
split_tabs::SplitTabLayout::kVertical);
std::unique_ptr<tabs::TabModel> detached_tab =
drag_controller.DetachTabAtForInsertion(
drag_controller.GetSessionData().source_view_index_);
// Insert the tab next to the currently active tab, add it to a split,
// then activate it.
const int new_tab_idx =
tab_strip_model_->active_index() +
(side == MultiContentsDropTargetView::DropSide::START ? 0 : 1);
const int inserted_tab_idx = tab_strip_model_->InsertDetachedTabAt(
new_tab_idx, std::move(detached_tab), AddTabTypes::ADD_NONE,
std::nullopt);
tab_strip_model_->AddToNewSplit(
{inserted_tab_idx}, split_data,
split_tabs::SplitTabCreatedSource::kDragAndDropTab);
tab_strip_model_->ActivateTabAt(inserted_tab_idx);
}
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