mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-07 04:05:49 +00:00
498 lines
12 KiB
C++
498 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "nsTreeBoxObject.h"
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#include "nsCOMPtr.h"
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#include "nsIDOMXULElement.h"
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#include "nsIXULTemplateBuilder.h"
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#include "nsTreeContentView.h"
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#include "nsITreeSelection.h"
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#include "nsChildIterator.h"
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#include "nsContentUtils.h"
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#include "nsError.h"
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#include "nsTreeBodyFrame.h"
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NS_IMPL_CYCLE_COLLECTION_1(nsTreeBoxObject, mView)
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NS_IMPL_ADDREF_INHERITED(nsTreeBoxObject, nsBoxObject)
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NS_IMPL_RELEASE_INHERITED(nsTreeBoxObject, nsBoxObject)
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NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION_INHERITED(nsTreeBoxObject)
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NS_INTERFACE_MAP_ENTRY(nsITreeBoxObject)
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NS_INTERFACE_MAP_END_INHERITING(nsBoxObject)
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void
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nsTreeBoxObject::Clear()
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{
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ClearCachedValues();
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// Drop the view's ref to us.
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if (mView) {
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nsCOMPtr<nsITreeSelection> sel;
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mView->GetSelection(getter_AddRefs(sel));
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if (sel)
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sel->SetTree(nullptr);
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mView->SetTree(nullptr); // Break the circular ref between the view and us.
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}
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mView = nullptr;
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nsBoxObject::Clear();
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}
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nsTreeBoxObject::nsTreeBoxObject()
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: mTreeBody(nullptr)
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{
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}
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nsTreeBoxObject::~nsTreeBoxObject()
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{
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/* destructor code */
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}
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static void FindBodyElement(nsIContent* aParent, nsIContent** aResult)
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{
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*aResult = nullptr;
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ChildIterator iter, last;
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for (ChildIterator::Init(aParent, &iter, &last); iter != last; ++iter) {
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nsCOMPtr<nsIContent> content = *iter;
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nsINodeInfo *ni = content->NodeInfo();
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if (ni->Equals(nsGkAtoms::treechildren, kNameSpaceID_XUL)) {
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*aResult = content;
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NS_ADDREF(*aResult);
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break;
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} else if (ni->Equals(nsGkAtoms::tree, kNameSpaceID_XUL)) {
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// There are nesting tree elements. Only the innermost should
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// find the treechilren.
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break;
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} else if (content->IsElement() &&
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!ni->Equals(nsGkAtoms::_template, kNameSpaceID_XUL)) {
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FindBodyElement(content, aResult);
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if (*aResult)
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break;
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}
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}
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}
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nsTreeBodyFrame*
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nsTreeBoxObject::GetTreeBody(bool aFlushLayout)
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{
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// Make sure our frames are up to date, and layout as needed. We
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// have to do this before checking for our cached mTreeBody, since
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// it might go away on style flush, and in any case if aFlushLayout
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// is true we need to make sure to flush no matter what.
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// XXXbz except that flushing style when we were not asked to flush
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// layout here breaks things. See bug 585123.
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nsIFrame* frame;
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if (aFlushLayout) {
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frame = GetFrame(aFlushLayout);
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if (!frame)
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return nullptr;
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}
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if (mTreeBody) {
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// Have one cached already.
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return mTreeBody;
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}
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if (!aFlushLayout) {
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frame = GetFrame(aFlushLayout);
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if (!frame)
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return nullptr;
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}
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// Iterate over our content model children looking for the body.
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nsCOMPtr<nsIContent> content;
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FindBodyElement(frame->GetContent(), getter_AddRefs(content));
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if (!content)
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return nullptr;
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frame = content->GetPrimaryFrame();
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if (!frame)
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return nullptr;
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// Make sure that the treebodyframe has a pointer to |this|.
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nsTreeBodyFrame *treeBody = do_QueryFrame(frame);
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NS_ENSURE_TRUE(treeBody && treeBody->GetTreeBoxObject() == this, nullptr);
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mTreeBody = treeBody;
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return mTreeBody;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetView(nsITreeView * *aView)
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{
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if (!mTreeBody) {
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if (!GetTreeBody()) {
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// Don't return an uninitialised view
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*aView = nullptr;
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return NS_OK;
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}
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if (mView)
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// Our new frame needs to initialise itself
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return mTreeBody->GetView(aView);
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}
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if (!mView) {
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nsCOMPtr<nsIDOMXULElement> xulele = do_QueryInterface(mContent);
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if (xulele) {
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// See if there is a XUL tree builder associated with the element
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nsCOMPtr<nsIXULTemplateBuilder> builder;
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xulele->GetBuilder(getter_AddRefs(builder));
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mView = do_QueryInterface(builder);
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if (!mView) {
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// No tree builder, create a tree content view.
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nsresult rv = NS_NewTreeContentView(getter_AddRefs(mView));
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NS_ENSURE_SUCCESS(rv, rv);
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}
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// Initialise the frame and view
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mTreeBody->SetView(mView);
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}
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}
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NS_IF_ADDREF(*aView = mView);
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return NS_OK;
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}
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static bool
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CanTrustView(nsISupports* aValue)
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{
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// Untrusted content is only allowed to specify known-good views
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if (nsContentUtils::IsCallerChrome())
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return true;
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nsCOMPtr<nsINativeTreeView> nativeTreeView = do_QueryInterface(aValue);
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if (!nativeTreeView || NS_FAILED(nativeTreeView->EnsureNative())) {
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// XXX ERRMSG need a good error here for developers
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return false;
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}
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return true;
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}
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NS_IMETHODIMP nsTreeBoxObject::SetView(nsITreeView * aView)
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{
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if (!CanTrustView(aView))
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return NS_ERROR_DOM_SECURITY_ERR;
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mView = aView;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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body->SetView(aView);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetFocused(bool* aFocused)
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{
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*aFocused = false;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->GetFocused(aFocused);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::SetFocused(bool aFocused)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->SetFocused(aFocused);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetTreeBody(nsIDOMElement** aElement)
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{
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*aElement = nullptr;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->GetTreeBody(aElement);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetColumns(nsITreeColumns** aColumns)
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{
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*aColumns = nullptr;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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*aColumns = body->Columns().get();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetRowHeight(int32_t* aRowHeight)
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{
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*aRowHeight = 0;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->GetRowHeight(aRowHeight);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetRowWidth(int32_t *aRowWidth)
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{
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*aRowWidth = 0;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->GetRowWidth(aRowWidth);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetFirstVisibleRow(int32_t *aFirstVisibleRow)
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{
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*aFirstVisibleRow = 0;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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*aFirstVisibleRow = body->FirstVisibleRow();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetLastVisibleRow(int32_t *aLastVisibleRow)
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{
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*aLastVisibleRow = 0;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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*aLastVisibleRow = body->LastVisibleRow();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetHorizontalPosition(int32_t *aHorizontalPosition)
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{
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*aHorizontalPosition = 0;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->GetHorizontalPosition(aHorizontalPosition);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetPageLength(int32_t *aPageLength)
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{
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*aPageLength = 0;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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*aPageLength = body->PageLength();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetSelectionRegion(nsIScriptableRegion **aRegion)
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{
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*aRegion = nullptr;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->GetSelectionRegion(aRegion);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTreeBoxObject::EnsureRowIsVisible(int32_t aRow)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->EnsureRowIsVisible(aRow);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTreeBoxObject::EnsureCellIsVisible(int32_t aRow, nsITreeColumn* aCol)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->EnsureCellIsVisible(aRow, aCol);
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return NS_OK;
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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NS_IMETHODIMP
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nsTreeBoxObject::ScrollToRow(int32_t aRow)
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{
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nsTreeBodyFrame* body = GetTreeBody(true);
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if (body)
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return body->ScrollToRow(aRow);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTreeBoxObject::ScrollByLines(int32_t aNumLines)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->ScrollByLines(aNumLines);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTreeBoxObject::ScrollByPages(int32_t aNumPages)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->ScrollByPages(aNumPages);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTreeBoxObject::ScrollToCell(int32_t aRow, nsITreeColumn* aCol)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->ScrollToCell(aRow, aCol);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTreeBoxObject::ScrollToColumn(nsITreeColumn* aCol)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->ScrollToColumn(aCol);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTreeBoxObject::ScrollToHorizontalPosition(int32_t aHorizontalPosition)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->ScrollToHorizontalPosition(aHorizontalPosition);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::Invalidate()
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->Invalidate();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::InvalidateColumn(nsITreeColumn* aCol)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->InvalidateColumn(aCol);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::InvalidateRow(int32_t aIndex)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->InvalidateRow(aIndex);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::InvalidateCell(int32_t aRow, nsITreeColumn* aCol)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->InvalidateCell(aRow, aCol);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::InvalidateRange(int32_t aStart, int32_t aEnd)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->InvalidateRange(aStart, aEnd);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::InvalidateColumnRange(int32_t aStart, int32_t aEnd, nsITreeColumn* aCol)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->InvalidateColumnRange(aStart, aEnd, aCol);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetRowAt(int32_t x, int32_t y, int32_t *aRow)
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{
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*aRow = 0;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->GetRowAt(x, y, aRow);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::GetCellAt(int32_t aX, int32_t aY, int32_t *aRow, nsITreeColumn** aCol,
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nsACString& aChildElt)
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{
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*aRow = 0;
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*aCol = nullptr;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->GetCellAt(aX, aY, aRow, aCol, aChildElt);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTreeBoxObject::GetCoordsForCellItem(int32_t aRow, nsITreeColumn* aCol, const nsACString& aElement,
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int32_t *aX, int32_t *aY, int32_t *aWidth, int32_t *aHeight)
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{
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*aX = *aY = *aWidth = *aHeight = 0;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->GetCoordsForCellItem(aRow, aCol, aElement, aX, aY, aWidth, aHeight);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsTreeBoxObject::IsCellCropped(int32_t aRow, nsITreeColumn* aCol, bool *aIsCropped)
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{
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*aIsCropped = false;
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->IsCellCropped(aRow, aCol, aIsCropped);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::RowCountChanged(int32_t aIndex, int32_t aDelta)
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->RowCountChanged(aIndex, aDelta);
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::BeginUpdateBatch()
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->BeginUpdateBatch();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::EndUpdateBatch()
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->EndUpdateBatch();
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return NS_OK;
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}
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NS_IMETHODIMP nsTreeBoxObject::ClearStyleAndImageCaches()
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{
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nsTreeBodyFrame* body = GetTreeBody();
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if (body)
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return body->ClearStyleAndImageCaches();
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return NS_OK;
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}
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void
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nsTreeBoxObject::ClearCachedValues()
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{
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mTreeBody = nullptr;
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}
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// Creation Routine ///////////////////////////////////////////////////////////////////////
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nsresult
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NS_NewTreeBoxObject(nsIBoxObject** aResult)
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{
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*aResult = new nsTreeBoxObject;
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if (!*aResult)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(*aResult);
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return NS_OK;
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}
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