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-rw-r--r--dom/ipc/TabContext.cpp106
1 files changed, 106 insertions, 0 deletions
diff --git a/dom/ipc/TabContext.cpp b/dom/ipc/TabContext.cpp
new file mode 100644
index 0000000000..4344ec221a
--- /dev/null
+++ b/dom/ipc/TabContext.cpp
@@ -0,0 +1,106 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "mozilla/dom/TabContext.h"
+#include "mozilla/dom/PTabContext.h"
+#include "mozilla/dom/BrowserParent.h"
+#include "mozilla/dom/BrowserChild.h"
+#include "mozilla/StaticPrefs_dom.h"
+#include "nsServiceManagerUtils.h"
+
+using namespace mozilla::dom::ipc;
+using namespace mozilla::layout;
+
+namespace mozilla::dom {
+
+TabContext::TabContext()
+ : mInitialized(false),
+ mChromeOuterWindowID(0),
+ mMaxTouchPoints(0) {}
+
+uint64_t TabContext::ChromeOuterWindowID() const {
+ return mChromeOuterWindowID;
+}
+
+bool TabContext::SetTabContext(const TabContext& aContext) {
+ NS_ENSURE_FALSE(mInitialized, false);
+
+ *this = aContext;
+ mInitialized = true;
+
+ return true;
+}
+
+bool TabContext::UpdateTabContextAfterSwap(const TabContext& aContext) {
+ // This is only used after already initialized.
+ MOZ_ASSERT(mInitialized);
+
+ // The only permissable changes are to mChromeOuterWindowID. All other fields
+ // must match for the change to be accepted.
+
+ mChromeOuterWindowID = aContext.mChromeOuterWindowID;
+ return true;
+}
+
+bool TabContext::SetTabContext(uint64_t aChromeOuterWindowID,
+ uint32_t aMaxTouchPoints) {
+ NS_ENSURE_FALSE(mInitialized, false);
+
+ mInitialized = true;
+ mChromeOuterWindowID = aChromeOuterWindowID;
+ mMaxTouchPoints = aMaxTouchPoints;
+ return true;
+}
+
+IPCTabContext TabContext::AsIPCTabContext() const {
+ return IPCTabContext(
+ FrameIPCTabContext(mChromeOuterWindowID, mMaxTouchPoints));
+}
+
+MaybeInvalidTabContext::MaybeInvalidTabContext(const IPCTabContext& aParams)
+ : mInvalidReason(nullptr) {
+ uint64_t chromeOuterWindowID = 0;
+ uint32_t maxTouchPoints = 0;
+
+ switch (aParams.type()) {
+ case IPCTabContext::TPopupIPCTabContext: {
+ const PopupIPCTabContext& ipcContext = aParams.get_PopupIPCTabContext();
+
+ chromeOuterWindowID = ipcContext.chromeOuterWindowID();
+ break;
+ }
+ case IPCTabContext::TFrameIPCTabContext: {
+ const FrameIPCTabContext& ipcContext = aParams.get_FrameIPCTabContext();
+
+ chromeOuterWindowID = ipcContext.chromeOuterWindowID();
+ maxTouchPoints = ipcContext.maxTouchPoints();
+ break;
+ }
+ default: {
+ MOZ_CRASH();
+ }
+ }
+
+ if (!mTabContext.SetTabContext(chromeOuterWindowID, maxTouchPoints)) {
+ mInvalidReason = "Couldn't initialize TabContext.";
+ }
+}
+
+bool MaybeInvalidTabContext::IsValid() { return mInvalidReason == nullptr; }
+
+const char* MaybeInvalidTabContext::GetInvalidReason() {
+ return mInvalidReason;
+}
+
+const TabContext& MaybeInvalidTabContext::GetTabContext() {
+ if (!IsValid()) {
+ MOZ_CRASH("Can't GetTabContext() if !IsValid().");
+ }
+
+ return mTabContext;
+}
+
+} // namespace mozilla::dom