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tenfourfox/toolkit/components/typeaheadfind/nsTypeAheadFind.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsCOMPtr.h"
#include "nsMemory.h"
#include "nsIServiceManager.h"
#include "mozilla/ModuleUtils.h"
#include "mozilla/Services.h"
#include "nsIWebBrowserChrome.h"
#include "nsCURILoader.h"
#include "nsCycleCollectionParticipant.h"
#include "nsNetUtil.h"
#include "nsIURL.h"
#include "nsIURI.h"
#include "nsIDocShell.h"
#include "nsIDocShellTreeOwner.h"
#include "nsISimpleEnumerator.h"
#include "nsPIDOMWindow.h"
#include "nsIPrefBranch.h"
#include "nsIPrefService.h"
#include "nsString.h"
#include "nsCRT.h"
#include "nsIDOMNode.h"
#include "mozilla/dom/Element.h"
#include "nsIFrame.h"
#include "nsFrameTraversal.h"
#include "nsIImageDocument.h"
#include "nsIDOMHTMLDocument.h"
#include "nsIDOMHTMLElement.h"
#include "nsIDocument.h"
#include "nsISelection.h"
#include "nsTextFragment.h"
#include "nsIDOMNSEditableElement.h"
#include "nsIEditor.h"
#include "nsIDocShellTreeItem.h"
#include "nsIWebNavigation.h"
#include "nsIInterfaceRequestor.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsContentCID.h"
#include "nsLayoutCID.h"
#include "nsWidgetsCID.h"
#include "nsIFormControl.h"
#include "nsNameSpaceManager.h"
#include "nsIWindowWatcher.h"
#include "nsIObserverService.h"
#include "nsFocusManager.h"
#include "mozilla/dom/Element.h"
#include "mozilla/dom/Link.h"
#include "nsRange.h"
#include "nsXBLBinding.h"
#include "nsTypeAheadFind.h"
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(nsTypeAheadFind)
NS_INTERFACE_MAP_ENTRY(nsITypeAheadFind)
NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsITypeAheadFind)
NS_INTERFACE_MAP_ENTRY(nsISupportsWeakReference)
NS_INTERFACE_MAP_ENTRY(nsIObserver)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsTypeAheadFind)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsTypeAheadFind)
NS_IMPL_CYCLE_COLLECTION(nsTypeAheadFind, mFoundLink, mFoundEditable,
mCurrentWindow, mStartFindRange, mSearchRange,
mStartPointRange, mEndPointRange, mSoundInterface,
mFind, mFoundRange)
static NS_DEFINE_CID(kFrameTraversalCID, NS_FRAMETRAVERSAL_CID);
#define NS_FIND_CONTRACTID "@mozilla.org/embedcomp/rangefind;1"
nsTypeAheadFind::nsTypeAheadFind():
mStartLinksOnlyPref(false),
mCaretBrowsingOn(false),
mDidAddObservers(false),
mLastFindLength(0),
mIsSoundInitialized(false),
mCaseSensitive(false)
{
}
nsTypeAheadFind::~nsTypeAheadFind()
{
nsCOMPtr<nsIPrefBranch> prefInternal(do_GetService(NS_PREFSERVICE_CONTRACTID));
if (prefInternal) {
prefInternal->RemoveObserver("accessibility.typeaheadfind", this);
prefInternal->RemoveObserver("accessibility.browsewithcaret", this);
}
}
nsresult
nsTypeAheadFind::Init(nsIDocShell* aDocShell)
{
nsCOMPtr<nsIPrefBranch> prefInternal(do_GetService(NS_PREFSERVICE_CONTRACTID));
mSearchRange = nullptr;
mStartPointRange = nullptr;
mEndPointRange = nullptr;
if (!prefInternal || !EnsureFind())
return NS_ERROR_FAILURE;
SetDocShell(aDocShell);
if (!mDidAddObservers) {
mDidAddObservers = true;
// ----------- Listen to prefs ------------------
nsresult rv = prefInternal->AddObserver("accessibility.browsewithcaret", this, true);
NS_ENSURE_SUCCESS(rv, rv);
// ----------- Get initial preferences ----------
PrefsReset();
nsCOMPtr<nsIObserverService> os = mozilla::services::GetObserverService();
if (os) {
os->AddObserver(this, DOM_WINDOW_DESTROYED_TOPIC, true);
}
}
return NS_OK;
}
nsresult
nsTypeAheadFind::PrefsReset()
{
nsCOMPtr<nsIPrefBranch> prefBranch(do_GetService(NS_PREFSERVICE_CONTRACTID));
NS_ENSURE_TRUE(prefBranch, NS_ERROR_FAILURE);
prefBranch->GetBoolPref("accessibility.typeaheadfind.startlinksonly",
&mStartLinksOnlyPref);
bool isSoundEnabled = true;
prefBranch->GetBoolPref("accessibility.typeaheadfind.enablesound",
&isSoundEnabled);
nsXPIDLCString soundStr;
if (isSoundEnabled)
prefBranch->GetCharPref("accessibility.typeaheadfind.soundURL", getter_Copies(soundStr));
mNotFoundSoundURL = soundStr;
prefBranch->GetBoolPref("accessibility.browsewithcaret",
&mCaretBrowsingOn);
return NS_OK;
}
NS_IMETHODIMP
nsTypeAheadFind::SetCaseSensitive(bool isCaseSensitive)
{
mCaseSensitive = isCaseSensitive;
if (mFind) {
mFind->SetCaseSensitive(mCaseSensitive);
}
return NS_OK;
}
NS_IMETHODIMP
nsTypeAheadFind::GetCaseSensitive(bool* isCaseSensitive)
{
*isCaseSensitive = mCaseSensitive;
return NS_OK;
}
NS_IMETHODIMP
nsTypeAheadFind::SetDocShell(nsIDocShell* aDocShell)
{
mDocShell = do_GetWeakReference(aDocShell);
mWebBrowserFind = do_GetInterface(aDocShell);
NS_ENSURE_TRUE(mWebBrowserFind, NS_ERROR_FAILURE);
nsCOMPtr<nsIPresShell> presShell;
presShell = aDocShell->GetPresShell();
mPresShell = do_GetWeakReference(presShell);
ReleaseStrongMemberVariables();
return NS_OK;
}
void
nsTypeAheadFind::ReleaseStrongMemberVariables()
{
mStartFindRange = nullptr;
mStartPointRange = nullptr;
mSearchRange = nullptr;
mEndPointRange = nullptr;
mFoundLink = nullptr;
mFoundEditable = nullptr;
mFoundRange = nullptr;
mCurrentWindow = nullptr;
mSelectionController = nullptr;
mFind = nullptr;
}
NS_IMETHODIMP
nsTypeAheadFind::SetSelectionModeAndRepaint(int16_t aToggle)
{
nsCOMPtr<nsISelectionController> selectionController =
do_QueryReferent(mSelectionController);
if (!selectionController) {
return NS_OK;
}
selectionController->SetDisplaySelection(aToggle);
selectionController->RepaintSelection(nsISelectionController::SELECTION_NORMAL);
return NS_OK;
}
NS_IMETHODIMP
nsTypeAheadFind::CollapseSelection()
{
nsCOMPtr<nsISelectionController> selectionController =
do_QueryReferent(mSelectionController);
if (!selectionController) {
return NS_OK;
}
nsCOMPtr<nsISelection> selection;
selectionController->GetSelection(nsISelectionController::SELECTION_NORMAL,
getter_AddRefs(selection));
if (selection)
selection->CollapseToStart();
return NS_OK;
}
NS_IMETHODIMP
nsTypeAheadFind::Observe(nsISupports *aSubject, const char *aTopic,
const char16_t *aData)
{
if (!nsCRT::strcmp(aTopic, NS_PREFBRANCH_PREFCHANGE_TOPIC_ID)) {
return PrefsReset();
} else if (!nsCRT::strcmp(aTopic, DOM_WINDOW_DESTROYED_TOPIC) &&
SameCOMIdentity(aSubject, mCurrentWindow)) {
ReleaseStrongMemberVariables();
}
return NS_OK;
}
void
nsTypeAheadFind::SaveFind()
{
if (mWebBrowserFind)
mWebBrowserFind->SetSearchString(mTypeAheadBuffer.get());
// save the length of this find for "not found" sound
mLastFindLength = mTypeAheadBuffer.Length();
}
void
nsTypeAheadFind::PlayNotFoundSound()
{
if (mNotFoundSoundURL.IsEmpty()) // no sound
return;
if (!mSoundInterface)
mSoundInterface = do_CreateInstance("@mozilla.org/sound;1");
if (mSoundInterface) {
mIsSoundInitialized = true;
if (mNotFoundSoundURL.EqualsLiteral("beep")) {
mSoundInterface->Beep();
return;
}
nsCOMPtr<nsIURI> soundURI;
if (mNotFoundSoundURL.EqualsLiteral("default"))
NS_NewURI(getter_AddRefs(soundURI), NS_LITERAL_CSTRING(TYPEAHEADFIND_NOTFOUND_WAV_URL));
else
NS_NewURI(getter_AddRefs(soundURI), mNotFoundSoundURL);
nsCOMPtr<nsIURL> soundURL(do_QueryInterface(soundURI));
if (soundURL)
mSoundInterface->Play(soundURL);
}
}
nsresult
nsTypeAheadFind::FindItNow(nsIPresShell *aPresShell, bool aIsLinksOnly,
bool aIsFirstVisiblePreferred, bool aFindPrev,
uint16_t* aResult)
{
*aResult = FIND_NOTFOUND;
mFoundLink = nullptr;
mFoundEditable = nullptr;
mFoundRange = nullptr;
mCurrentWindow = nullptr;
nsCOMPtr<nsIPresShell> startingPresShell (GetPresShell());
if (!startingPresShell) {
nsCOMPtr<nsIDocShell> ds = do_QueryReferent(mDocShell);
NS_ENSURE_TRUE(ds, NS_ERROR_FAILURE);
startingPresShell = ds->GetPresShell();
mPresShell = do_GetWeakReference(startingPresShell);
}
nsCOMPtr<nsIPresShell> presShell(aPresShell);
if (!presShell) {
presShell = startingPresShell; // this is the current document
if (!presShell)
return NS_ERROR_FAILURE;
}
RefPtr<nsPresContext> presContext = presShell->GetPresContext();
if (!presContext)
return NS_ERROR_FAILURE;
nsCOMPtr<nsISelection> selection;
nsCOMPtr<nsISelectionController> selectionController =
do_QueryReferent(mSelectionController);
if (!selectionController) {
GetSelection(presShell, getter_AddRefs(selectionController),
getter_AddRefs(selection)); // cache for reuse
mSelectionController = do_GetWeakReference(selectionController);
} else {
selectionController->GetSelection(
nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
}
nsCOMPtr<nsIDocShell> startingDocShell(presContext->GetDocShell());
NS_ASSERTION(startingDocShell, "Bug 175321 Crashes with Type Ahead Find [@ nsTypeAheadFind::FindItNow]");
if (!startingDocShell)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIDocShellTreeItem> rootContentTreeItem;
nsCOMPtr<nsIDocShell> currentDocShell;
startingDocShell->GetSameTypeRootTreeItem(getter_AddRefs(rootContentTreeItem));
nsCOMPtr<nsIDocShell> rootContentDocShell =
do_QueryInterface(rootContentTreeItem);
if (!rootContentDocShell)
return NS_ERROR_FAILURE;
nsCOMPtr<nsISimpleEnumerator> docShellEnumerator;
rootContentDocShell->GetDocShellEnumerator(nsIDocShellTreeItem::typeContent,
nsIDocShell::ENUMERATE_FORWARDS,
getter_AddRefs(docShellEnumerator));
// Default: can start at the current document
nsCOMPtr<nsISupports> currentContainer =
do_QueryInterface(rootContentDocShell);
// Iterate up to current shell, if there's more than 1 that we're
// dealing with
bool hasMoreDocShells;
while (NS_SUCCEEDED(docShellEnumerator->HasMoreElements(&hasMoreDocShells)) && hasMoreDocShells) {
docShellEnumerator->GetNext(getter_AddRefs(currentContainer));
currentDocShell = do_QueryInterface(currentContainer);
if (!currentDocShell || currentDocShell == startingDocShell || aIsFirstVisiblePreferred)
break;
}
// ------------ Get ranges ready ----------------
nsCOMPtr<nsIDOMRange> returnRange;
nsCOMPtr<nsIPresShell> focusedPS;
if (NS_FAILED(GetSearchContainers(currentContainer,
(!aIsFirstVisiblePreferred ||
mStartFindRange) ?
selectionController.get() : nullptr,
aIsFirstVisiblePreferred, aFindPrev,
getter_AddRefs(presShell),
getter_AddRefs(presContext)))) {
return NS_ERROR_FAILURE;
}
int16_t rangeCompareResult = 0;
if (!mStartPointRange) {
mStartPointRange = new nsRange(presShell->GetDocument());
}
mStartPointRange->CompareBoundaryPoints(nsIDOMRange::START_TO_START, mSearchRange, &rangeCompareResult);
// No need to wrap find in doc if starting at beginning
bool hasWrapped = (rangeCompareResult < 0);
if (mTypeAheadBuffer.IsEmpty() || !EnsureFind())
return NS_ERROR_FAILURE;
mFind->SetFindBackwards(aFindPrev);
while (true) { // ----- Outer while loop: go through all docs -----
while (true) { // === Inner while loop: go through a single doc ===
mFind->Find(mTypeAheadBuffer, mSearchRange, mStartPointRange,
mEndPointRange, getter_AddRefs(returnRange));
if (!returnRange)
break; // Nothing found in this doc, go to outer loop (try next doc)
// ------- Test resulting found range for success conditions ------
bool isInsideLink = false, isStartingLink = false;
if (aIsLinksOnly) {
// Don't check if inside link when searching all text
RangeStartsInsideLink(returnRange, presShell, &isInsideLink,
&isStartingLink);
}
bool usesIndependentSelection;
if (!IsRangeVisible(presShell, presContext, returnRange,
aIsFirstVisiblePreferred, false,
getter_AddRefs(mStartPointRange),
&usesIndependentSelection) ||
(aIsLinksOnly && !isInsideLink) ||
(mStartLinksOnlyPref && aIsLinksOnly && !isStartingLink)) {
// ------ Failure ------
// At this point mStartPointRange got updated to the first
// visible range in the viewport. We _may_ be able to just
// start there, if it's not taking us in the wrong direction.
if (aFindPrev) {
// We can continue at the end of mStartPointRange if its end is before
// the start of returnRange or coincides with it. Otherwise, we need
// to continue at the start of returnRange.
int16_t compareResult;
nsresult rv =
mStartPointRange->CompareBoundaryPoints(nsIDOMRange::START_TO_END,
returnRange, &compareResult);
if (NS_SUCCEEDED(rv) && compareResult <= 0) {
// OK to start at the end of mStartPointRange
mStartPointRange->Collapse(false);
} else {
// Start at the beginning of returnRange
returnRange->CloneRange(getter_AddRefs(mStartPointRange));
mStartPointRange->Collapse(true);
}
} else {
// We can continue at the start of mStartPointRange if its start is
// after the end of returnRange or coincides with it. Otherwise, we
// need to continue at the end of returnRange.
int16_t compareResult;
nsresult rv =
mStartPointRange->CompareBoundaryPoints(nsIDOMRange::END_TO_START,
returnRange, &compareResult);
if (NS_SUCCEEDED(rv) && compareResult >= 0) {
// OK to start at the start of mStartPointRange
mStartPointRange->Collapse(true);
} else {
// Start at the end of returnRange
returnRange->CloneRange(getter_AddRefs(mStartPointRange));
mStartPointRange->Collapse(false);
}
}
continue;
}
mFoundRange = returnRange;
// ------ Success! -------
// Hide old selection (new one may be on a different controller)
if (selection) {
selection->CollapseToStart();
SetSelectionModeAndRepaint(nsISelectionController::SELECTION_ON);
}
// Make sure new document is selected
if (presShell != startingPresShell) {
// We are in a new document (because of frames/iframes)
mPresShell = do_GetWeakReference(presShell);
}
nsCOMPtr<nsIDocument> document =
do_QueryInterface(presShell->GetDocument());
NS_ASSERTION(document, "Wow, presShell doesn't have document!");
if (!document)
return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsPIDOMWindow> window = document->GetInnerWindow();
NS_ASSERTION(window, "document has no window");
if (!window)
return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIFocusManager> fm = do_GetService(FOCUSMANAGER_CONTRACTID);
if (usesIndependentSelection) {
/* If a search result is found inside an editable element, we'll focus
* the element only if focus is in our content window, i.e.
* |if (focusedWindow.top == ourWindow.top)| */
bool shouldFocusEditableElement = false;
if (fm) {
nsCOMPtr<nsIDOMWindow> focusedWindow;
nsresult rv = fm->GetFocusedWindow(getter_AddRefs(focusedWindow));
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsPIDOMWindow> fwPI(do_QueryInterface(focusedWindow, &rv));
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIDocShellTreeItem> fwTreeItem
(do_QueryInterface(fwPI->GetDocShell(), &rv));
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIDocShellTreeItem> fwRootTreeItem;
rv = fwTreeItem->GetSameTypeRootTreeItem(getter_AddRefs(fwRootTreeItem));
if (NS_SUCCEEDED(rv) && fwRootTreeItem == rootContentTreeItem)
shouldFocusEditableElement = true;
}
}
}
}
// We may be inside an editable element, and therefore the selection
// may be controlled by a different selection controller. Walk up the
// chain of parent nodes to see if we find one.
nsCOMPtr<nsIDOMNode> node;
returnRange->GetStartContainer(getter_AddRefs(node));
while (node) {
nsCOMPtr<nsIDOMNSEditableElement> editable = do_QueryInterface(node);
if (editable) {
// Inside an editable element. Get the correct selection
// controller and selection.
nsCOMPtr<nsIEditor> editor;
editable->GetEditor(getter_AddRefs(editor));
NS_ASSERTION(editor, "Editable element has no editor!");
if (!editor) {
break;
}
editor->GetSelectionController(
getter_AddRefs(selectionController));
if (selectionController) {
selectionController->GetSelection(
nsISelectionController::SELECTION_NORMAL,
getter_AddRefs(selection));
}
mFoundEditable = do_QueryInterface(node);
if (!shouldFocusEditableElement)
break;
// Otherwise move focus/caret to editable element
if (fm)
fm->SetFocus(mFoundEditable, 0);
break;
}
nsIDOMNode* tmp = node;
tmp->GetParentNode(getter_AddRefs(node));
}
// If we reach here without setting mFoundEditable, then something
// besides editable elements can cause us to have an independent
// selection controller. I don't know whether this is possible.
// Currently, we simply fall back to grabbing the document's selection
// controller in this case. Perhaps we should reject this find match
// and search again.
NS_ASSERTION(mFoundEditable, "Independent selection controller on "
"non-editable element!");
}
if (!mFoundEditable) {
// Not using a separate selection controller, so just get the
// document's controller and selection.
GetSelection(presShell, getter_AddRefs(selectionController),
getter_AddRefs(selection));
}
mSelectionController = do_GetWeakReference(selectionController);
// Select the found text
if (selection) {
selection->RemoveAllRanges();
selection->AddRange(returnRange);
}
if (!mFoundEditable && fm) {
nsCOMPtr<nsIDOMWindow> win = do_QueryInterface(window);
fm->MoveFocus(win, nullptr, nsIFocusManager::MOVEFOCUS_CARET,
nsIFocusManager::FLAG_NOSCROLL | nsIFocusManager::FLAG_NOSWITCHFRAME,
getter_AddRefs(mFoundLink));
}
// Change selection color to ATTENTION and scroll to it. Careful: we
// must wait until after we goof with focus above before changing to
// ATTENTION, or when we MoveFocus() and the selection is not on a
// link, we'll blur, which will lose the ATTENTION.
if (selectionController) {
// Beware! This may flush notifications via synchronous
// ScrollSelectionIntoView.
SetSelectionModeAndRepaint(nsISelectionController::SELECTION_ATTENTION);
selectionController->ScrollSelectionIntoView(
nsISelectionController::SELECTION_NORMAL,
nsISelectionController::SELECTION_WHOLE_SELECTION,
nsISelectionController::SCROLL_CENTER_VERTICALLY |
nsISelectionController::SCROLL_SYNCHRONOUS);
}
mCurrentWindow = window;
*aResult = hasWrapped ? FIND_WRAPPED : FIND_FOUND;
return NS_OK;
}
// ======= end-inner-while (go through a single document) ==========
// ---------- Nothing found yet, try next document -------------
bool hasTriedFirstDoc = false;
do {
// ==== Second inner loop - get another while ====
if (NS_SUCCEEDED(docShellEnumerator->HasMoreElements(&hasMoreDocShells))
&& hasMoreDocShells) {
docShellEnumerator->GetNext(getter_AddRefs(currentContainer));
NS_ASSERTION(currentContainer, "HasMoreElements lied to us!");
currentDocShell = do_QueryInterface(currentContainer);
if (currentDocShell)
break;
}
else if (hasTriedFirstDoc) // Avoid potential infinite loop
return NS_ERROR_FAILURE; // No content doc shells
// Reached last doc shell, loop around back to first doc shell
rootContentDocShell->GetDocShellEnumerator(nsIDocShellTreeItem::typeContent,
nsIDocShell::ENUMERATE_FORWARDS,
getter_AddRefs(docShellEnumerator));
hasTriedFirstDoc = true;
} while (docShellEnumerator); // ==== end second inner while ===
bool continueLoop = false;
if (currentDocShell != startingDocShell)
continueLoop = true; // Try next document
else if (!hasWrapped || aIsFirstVisiblePreferred) {
// Finished searching through docshells:
// If aFirstVisiblePreferred == true, we may need to go through all
// docshells twice -once to look for visible matches, the second time
// for any match
aIsFirstVisiblePreferred = false;
hasWrapped = true;
continueLoop = true; // Go through all docs again
}
if (continueLoop) {
if (NS_FAILED(GetSearchContainers(currentContainer, nullptr,
aIsFirstVisiblePreferred, aFindPrev,
getter_AddRefs(presShell),
getter_AddRefs(presContext)))) {
continue;
}
if (aFindPrev) {
// Reverse mode: swap start and end points, so that we start
// at end of document and go to beginning
nsCOMPtr<nsIDOMRange> tempRange;
mStartPointRange->CloneRange(getter_AddRefs(tempRange));
if (!mEndPointRange) {
mEndPointRange = new nsRange(presShell->GetDocument());
}
mStartPointRange = mEndPointRange;
mEndPointRange = tempRange;
}
continue;
}
// ------------- Failed --------------
break;
} // end-outer-while: go through all docs
return NS_ERROR_FAILURE;
}
NS_IMETHODIMP
nsTypeAheadFind::GetSearchString(nsAString& aSearchString)
{
aSearchString = mTypeAheadBuffer;
return NS_OK;
}
NS_IMETHODIMP
nsTypeAheadFind::GetFoundLink(nsIDOMElement** aFoundLink)
{
NS_ENSURE_ARG_POINTER(aFoundLink);
*aFoundLink = mFoundLink;
NS_IF_ADDREF(*aFoundLink);
return NS_OK;
}
NS_IMETHODIMP
nsTypeAheadFind::GetFoundEditable(nsIDOMElement** aFoundEditable)
{
NS_ENSURE_ARG_POINTER(aFoundEditable);
*aFoundEditable = mFoundEditable;
NS_IF_ADDREF(*aFoundEditable);
return NS_OK;
}
NS_IMETHODIMP
nsTypeAheadFind::GetCurrentWindow(nsIDOMWindow** aCurrentWindow)
{
NS_ENSURE_ARG_POINTER(aCurrentWindow);
*aCurrentWindow = mCurrentWindow;
NS_IF_ADDREF(*aCurrentWindow);
return NS_OK;
}
nsresult
nsTypeAheadFind::GetSearchContainers(nsISupports *aContainer,
nsISelectionController *aSelectionController,
bool aIsFirstVisiblePreferred,
bool aFindPrev,
nsIPresShell **aPresShell,
nsPresContext **aPresContext)
{
NS_ENSURE_ARG_POINTER(aContainer);
NS_ENSURE_ARG_POINTER(aPresShell);
NS_ENSURE_ARG_POINTER(aPresContext);
*aPresShell = nullptr;
*aPresContext = nullptr;
nsCOMPtr<nsIDocShell> docShell(do_QueryInterface(aContainer));
if (!docShell)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIPresShell> presShell = docShell->GetPresShell();
RefPtr<nsPresContext> presContext;
docShell->GetPresContext(getter_AddRefs(presContext));
if (!presShell || !presContext)
return NS_ERROR_FAILURE;
nsIDocument* doc = presShell->GetDocument();
if (!doc)
return NS_ERROR_FAILURE;
nsCOMPtr<nsIContent> rootContent;
nsCOMPtr<nsIDOMHTMLDocument> htmlDoc(do_QueryInterface(doc));
if (htmlDoc) {
nsCOMPtr<nsIDOMHTMLElement> bodyEl;
htmlDoc->GetBody(getter_AddRefs(bodyEl));
rootContent = do_QueryInterface(bodyEl);
}
if (!rootContent)
rootContent = doc->GetRootElement();
nsCOMPtr<nsIDOMNode> rootNode(do_QueryInterface(rootContent));
if (!rootNode)
return NS_ERROR_FAILURE;
if (!mSearchRange) {
mSearchRange = new nsRange(doc);
}
nsCOMPtr<nsIDOMNode> searchRootNode = rootNode;
// Hack for XMLPrettyPrinter. nsFind can't handle complex anonymous content.
// If the root node has an XBL binding then there's not much we can do in
// in general, but we can try searching the binding's first child, which
// in the case of XMLPrettyPrinter contains the visible pretty-printed
// content.
nsXBLBinding* binding = rootContent->GetXBLBinding();
if (binding) {
nsIContent* anonContent = binding->GetAnonymousContent();
if (anonContent) {
searchRootNode = do_QueryInterface(anonContent->GetFirstChild());
}
}
mSearchRange->SelectNodeContents(searchRootNode);
if (!mStartPointRange) {
mStartPointRange = new nsRange(doc);
}
mStartPointRange->SetStart(searchRootNode, 0);
mStartPointRange->Collapse(true); // collapse to start
if (!mEndPointRange) {
mEndPointRange = new nsRange(doc);
}
nsCOMPtr<nsINode> searchRootTmp = do_QueryInterface(searchRootNode);
mEndPointRange->SetEnd(searchRootNode, searchRootTmp->Length());
mEndPointRange->Collapse(false); // collapse to end
// Consider current selection as null if
// it's not in the currently focused document
nsCOMPtr<nsIDOMRange> currentSelectionRange;
nsCOMPtr<nsIPresShell> selectionPresShell = GetPresShell();
if (aSelectionController && selectionPresShell && selectionPresShell == presShell) {
nsCOMPtr<nsISelection> selection;
aSelectionController->GetSelection(
nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
if (selection)
selection->GetRangeAt(0, getter_AddRefs(currentSelectionRange));
}
if (!currentSelectionRange) {
// Ensure visible range, move forward if necessary
// This uses ignores the return value, but usese the side effect of
// IsRangeVisible. It returns the first visible range after searchRange
IsRangeVisible(presShell, presContext, mSearchRange,
aIsFirstVisiblePreferred, true,
getter_AddRefs(mStartPointRange), nullptr);
}
else {
int32_t startOffset;
nsCOMPtr<nsIDOMNode> startNode;
if (aFindPrev) {
currentSelectionRange->GetStartContainer(getter_AddRefs(startNode));
currentSelectionRange->GetStartOffset(&startOffset);
} else {
currentSelectionRange->GetEndContainer(getter_AddRefs(startNode));
currentSelectionRange->GetEndOffset(&startOffset);
}
if (!startNode)
startNode = rootNode;
// We need to set the start point this way, other methods haven't worked
mStartPointRange->SelectNode(startNode);
mStartPointRange->SetStart(startNode, startOffset);
}
mStartPointRange->Collapse(true); // collapse to start
presShell.forget(aPresShell);
presContext.forget(aPresContext);
return NS_OK;
}
void
nsTypeAheadFind::RangeStartsInsideLink(nsIDOMRange *aRange,
nsIPresShell *aPresShell,
bool *aIsInsideLink,
bool *aIsStartingLink)
{
*aIsInsideLink = false;
*aIsStartingLink = true;
// ------- Get nsIContent to test -------
nsCOMPtr<nsIDOMNode> startNode;
nsCOMPtr<nsIContent> startContent, origContent;
aRange->GetStartContainer(getter_AddRefs(startNode));
int32_t startOffset;
aRange->GetStartOffset(&startOffset);
startContent = do_QueryInterface(startNode);
if (!startContent) {
NS_NOTREACHED("startContent should never be null");
return;
}
origContent = startContent;
if (startContent->IsElement()) {
nsIContent *childContent = startContent->GetChildAt(startOffset);
if (childContent) {
startContent = childContent;
}
}
else if (startOffset > 0) {
const nsTextFragment *textFrag = startContent->GetText();
if (textFrag) {
// look for non whitespace character before start offset
for (int32_t index = 0; index < startOffset; index++) {
// FIXME: take content language into account when deciding whitespace.
if (!mozilla::dom::IsSpaceCharacter(textFrag->CharAt(index))) {
*aIsStartingLink = false; // not at start of a node
break;
}
}
}
}
// ------- Check to see if inside link ---------
// We now have the correct start node for the range
// Search for links, starting with startNode, and going up parent chain
nsCOMPtr<nsIAtom> tag, hrefAtom(do_GetAtom("href"));
nsCOMPtr<nsIAtom> typeAtom(do_GetAtom("type"));
while (true) {
// Keep testing while startContent is equal to something,
// eventually we'll run out of ancestors
if (startContent->IsHTMLElement()) {
nsCOMPtr<mozilla::dom::Link> link(do_QueryInterface(startContent));
if (link) {
// Check to see if inside HTML link
*aIsInsideLink = startContent->HasAttr(kNameSpaceID_None, hrefAtom);
return;
}
}
else {
// Any xml element can be an xlink
*aIsInsideLink = startContent->HasAttr(kNameSpaceID_XLink, hrefAtom);
if (*aIsInsideLink) {
if (!startContent->AttrValueIs(kNameSpaceID_XLink, typeAtom,
NS_LITERAL_STRING("simple"),
eCaseMatters)) {
*aIsInsideLink = false; // Xlink must be type="simple"
}
return;
}
}
// Get the parent
nsCOMPtr<nsIContent> parent = startContent->GetParent();
if (!parent)
break;
nsIContent* parentsFirstChild = parent->GetFirstChild();
// We don't want to look at a whitespace-only first child
if (parentsFirstChild && parentsFirstChild->TextIsOnlyWhitespace()) {
parentsFirstChild = parentsFirstChild->GetNextSibling();
}
if (parentsFirstChild != startContent) {
// startContent wasn't a first child, so we conclude that
// if this is inside a link, it's not at the beginning of it
*aIsStartingLink = false;
}
startContent = parent;
}
*aIsStartingLink = false;
}
/* Find another match in the page. */
NS_IMETHODIMP
nsTypeAheadFind::FindAgain(bool aFindBackwards, bool aLinksOnly,
uint16_t* aResult)
{
*aResult = FIND_NOTFOUND;
if (!mTypeAheadBuffer.IsEmpty())
// Beware! This may flush notifications via synchronous
// ScrollSelectionIntoView.
FindItNow(nullptr, aLinksOnly, false, aFindBackwards, aResult);
return NS_OK;
}
NS_IMETHODIMP
nsTypeAheadFind::Find(const nsAString& aSearchString, bool aLinksOnly,
uint16_t* aResult)
{
*aResult = FIND_NOTFOUND;
nsCOMPtr<nsIPresShell> presShell (GetPresShell());
if (!presShell) {
nsCOMPtr<nsIDocShell> ds (do_QueryReferent(mDocShell));
NS_ENSURE_TRUE(ds, NS_ERROR_FAILURE);
presShell = ds->GetPresShell();
NS_ENSURE_TRUE(presShell, NS_ERROR_FAILURE);
mPresShell = do_GetWeakReference(presShell);
}
nsCOMPtr<nsISelection> selection;
nsCOMPtr<nsISelectionController> selectionController =
do_QueryReferent(mSelectionController);
if (!selectionController) {
GetSelection(presShell, getter_AddRefs(selectionController),
getter_AddRefs(selection)); // cache for reuse
mSelectionController = do_GetWeakReference(selectionController);
} else {
selectionController->GetSelection(
nsISelectionController::SELECTION_NORMAL, getter_AddRefs(selection));
}
if (selection)
selection->CollapseToStart();
if (aSearchString.IsEmpty()) {
mTypeAheadBuffer.Truncate();
// These will be initialized to their true values after the first character
// is typed
mStartFindRange = nullptr;
mSelectionController = nullptr;
*aResult = FIND_FOUND;
return NS_OK;
}
bool atEnd = false;
if (mTypeAheadBuffer.Length()) {
const nsAString& oldStr = Substring(mTypeAheadBuffer, 0, mTypeAheadBuffer.Length());
const nsAString& newStr = Substring(aSearchString, 0, mTypeAheadBuffer.Length());
if (oldStr.Equals(newStr))
atEnd = true;
const nsAString& newStr2 = Substring(aSearchString, 0, aSearchString.Length());
const nsAString& oldStr2 = Substring(mTypeAheadBuffer, 0, aSearchString.Length());
if (oldStr2.Equals(newStr2))
atEnd = true;
if (!atEnd)
mStartFindRange = nullptr;
}
if (!mIsSoundInitialized && !mNotFoundSoundURL.IsEmpty()) {
// This makes sure system sound library is loaded so that
// there's no lag before the first sound is played
// by waiting for the first keystroke, we still get the startup time benefits.
mIsSoundInitialized = true;
mSoundInterface = do_CreateInstance("@mozilla.org/sound;1");
if (mSoundInterface && !mNotFoundSoundURL.EqualsLiteral("beep")) {
mSoundInterface->Init();
}
}
#ifdef XP_WIN
// After each keystroke, ensure sound object is destroyed, to free up memory
// allocated for error sound, otherwise Windows' nsISound impl
// holds onto the last played sound, using up memory.
mSoundInterface = nullptr;
#endif
int32_t bufferLength = mTypeAheadBuffer.Length();
mTypeAheadBuffer = aSearchString;
bool isFirstVisiblePreferred = false;
// --------- Initialize find if 1st char ----------
if (bufferLength == 0) {
// If you can see the selection (not collapsed or thru caret browsing),
// or if already focused on a page element, start there.
// Otherwise we're going to start at the first visible element
bool isSelectionCollapsed = true;
if (selection)
selection->GetIsCollapsed(&isSelectionCollapsed);
// If true, we will scan from top left of visible area
// If false, we will scan from start of selection
isFirstVisiblePreferred = !atEnd && !mCaretBrowsingOn && isSelectionCollapsed;
if (isFirstVisiblePreferred) {
// Get the focused content. If there is a focused node, ensure the
// selection is at that point. Otherwise, we will just want to start
// from the caret position or the beginning of the document.
nsPresContext* presContext = presShell->GetPresContext();
NS_ENSURE_TRUE(presContext, NS_OK);
nsCOMPtr<nsIDocument> document =
do_QueryInterface(presShell->GetDocument());
if (!document)
return NS_ERROR_UNEXPECTED;
nsCOMPtr<nsIDOMWindow> window = do_QueryInterface(document->GetWindow());
nsCOMPtr<nsIFocusManager> fm = do_GetService(FOCUSMANAGER_CONTRACTID);
if (fm) {
nsCOMPtr<nsIDOMElement> focusedElement;
nsCOMPtr<nsIDOMWindow> focusedWindow;
fm->GetFocusedElementForWindow(window, false, getter_AddRefs(focusedWindow),
getter_AddRefs(focusedElement));
// If the root element is focused, then it's actually the document
// that has the focus, so ignore this.
if (focusedElement &&
!SameCOMIdentity(focusedElement, document->GetRootElement())) {
fm->MoveCaretToFocus(window);
isFirstVisiblePreferred = false;
}
}
}
}
// ----------- Find the text! ---------------------
// Beware! This may flush notifications via synchronous
// ScrollSelectionIntoView.
nsresult rv = FindItNow(nullptr, aLinksOnly, isFirstVisiblePreferred,
false, aResult);
// ---------Handle success or failure ---------------
if (NS_SUCCEEDED(rv)) {
if (mTypeAheadBuffer.Length() == 1) {
// If first letter, store where the first find succeeded
// (mStartFindRange)
mStartFindRange = nullptr;
if (selection) {
nsCOMPtr<nsIDOMRange> startFindRange;
selection->GetRangeAt(0, getter_AddRefs(startFindRange));
if (startFindRange)
startFindRange->CloneRange(getter_AddRefs(mStartFindRange));
}
}
}
else {
// Error sound
if (mTypeAheadBuffer.Length() > mLastFindLength)
PlayNotFoundSound();
}
SaveFind();
return NS_OK;
}
void
nsTypeAheadFind::GetSelection(nsIPresShell *aPresShell,
nsISelectionController **aSelCon,
nsISelection **aDOMSel)
{
if (!aPresShell)
return;
// if aCurrentNode is nullptr, get selection for document
*aDOMSel = nullptr;
nsPresContext* presContext = aPresShell->GetPresContext();
nsIFrame *frame = aPresShell->GetRootFrame();
if (presContext && frame) {
frame->GetSelectionController(presContext, aSelCon);
if (*aSelCon) {
(*aSelCon)->GetSelection(nsISelectionController::SELECTION_NORMAL,
aDOMSel);
}
}
}
NS_IMETHODIMP
nsTypeAheadFind::GetFoundRange(nsIDOMRange** aFoundRange)
{
NS_ENSURE_ARG_POINTER(aFoundRange);
if (mFoundRange == nullptr) {
*aFoundRange = nullptr;
return NS_OK;
}
mFoundRange->CloneRange(aFoundRange);
return NS_OK;
}
NS_IMETHODIMP
nsTypeAheadFind::IsRangeVisible(nsIDOMRange *aRange,
bool aMustBeInViewPort,
bool *aResult)
{
// Jump through hoops to extract the docShell from the range.
nsCOMPtr<nsIDOMNode> node;
aRange->GetStartContainer(getter_AddRefs(node));
nsCOMPtr<nsIDOMDocument> document;
node->GetOwnerDocument(getter_AddRefs(document));
nsCOMPtr<nsIDOMWindow> window;
document->GetDefaultView(getter_AddRefs(window));
nsCOMPtr<nsIWebNavigation> navNav (do_GetInterface(window));
nsCOMPtr<nsIDocShell> docShell (do_GetInterface(navNav));
// Set up the arguments needed to check if a range is visible.
nsCOMPtr<nsIPresShell> presShell (docShell->GetPresShell());
RefPtr<nsPresContext> presContext = presShell->GetPresContext();
nsCOMPtr<nsIDOMRange> startPointRange = new nsRange(presShell->GetDocument());
*aResult = IsRangeVisible(presShell, presContext, aRange,
aMustBeInViewPort, false,
getter_AddRefs(startPointRange),
nullptr);
return NS_OK;
}
bool
nsTypeAheadFind::IsRangeVisible(nsIPresShell *aPresShell,
nsPresContext *aPresContext,
nsIDOMRange *aRange, bool aMustBeInViewPort,
bool aGetTopVisibleLeaf,
nsIDOMRange **aFirstVisibleRange,
bool *aUsesIndependentSelection)
{
NS_ASSERTION(aPresShell && aPresContext && aRange && aFirstVisibleRange,
"params are invalid");
// We need to know if the range start is visible.
// Otherwise, return the first visible range start
// in aFirstVisibleRange
aRange->CloneRange(aFirstVisibleRange);
nsCOMPtr<nsIDOMNode> node;
aRange->GetStartContainer(getter_AddRefs(node));
nsCOMPtr<nsIContent> content(do_QueryInterface(node));
if (!content)
return false;
nsIFrame *frame = content->GetPrimaryFrame();
if (!frame)
return false; // No frame! Not visible then.
if (!frame->StyleVisibility()->IsVisible())
return false;
// Detect if we are _inside_ a text control, or something else with its own
// selection controller.
if (aUsesIndependentSelection) {
*aUsesIndependentSelection =
(frame->GetStateBits() & NS_FRAME_INDEPENDENT_SELECTION);
}
// ---- We have a frame ----
if (!aMustBeInViewPort)
return true; // Don't need it to be on screen, just in rendering tree
// Get the next in flow frame that contains the range start
int32_t startRangeOffset, startFrameOffset, endFrameOffset;
aRange->GetStartOffset(&startRangeOffset);
while (true) {
frame->GetOffsets(startFrameOffset, endFrameOffset);
if (startRangeOffset < endFrameOffset)
break;
nsIFrame *nextContinuationFrame = frame->GetNextContinuation();
if (nextContinuationFrame)
frame = nextContinuationFrame;
else
break;
}
// Set up the variables we need, return true if we can't get at them all
const uint16_t kMinPixels = 12;
nscoord minDistance = nsPresContext::CSSPixelsToAppUnits(kMinPixels);
// Get the bounds of the current frame, relative to the current view.
// We don't use the more accurate AccGetBounds, because that is
// more expensive and the STATE_OFFSCREEN flag that this is used
// for only needs to be a rough indicator
nsRectVisibility rectVisibility = nsRectVisibility_kAboveViewport;
if (!aGetTopVisibleLeaf && !frame->GetRect().IsEmpty()) {
rectVisibility =
aPresShell->GetRectVisibility(frame,
nsRect(nsPoint(0,0), frame->GetSize()),
minDistance);
if (rectVisibility != nsRectVisibility_kAboveViewport) {
return true;
}
}
// We know that the target range isn't usable because it's not in the
// view port. Move range forward to first visible point,
// this speeds us up a lot in long documents
nsCOMPtr<nsIFrameEnumerator> frameTraversal;
nsCOMPtr<nsIFrameTraversal> trav(do_CreateInstance(kFrameTraversalCID));
if (trav)
trav->NewFrameTraversal(getter_AddRefs(frameTraversal),
aPresContext, frame,
eLeaf,
false, // aVisual
false, // aLockInScrollView
false, // aFollowOOFs
false // aSkipPopupChecks
);
if (!frameTraversal)
return false;
while (rectVisibility == nsRectVisibility_kAboveViewport) {
frameTraversal->Next();
frame = frameTraversal->CurrentItem();
if (!frame)
return false;
if (!frame->GetRect().IsEmpty()) {
rectVisibility =
aPresShell->GetRectVisibility(frame,
nsRect(nsPoint(0,0), frame->GetSize()),
minDistance);
}
}
if (frame) {
nsCOMPtr<nsIDOMNode> firstVisibleNode = do_QueryInterface(frame->GetContent());
if (firstVisibleNode) {
frame->GetOffsets(startFrameOffset, endFrameOffset);
(*aFirstVisibleRange)->SetStart(firstVisibleNode, startFrameOffset);
(*aFirstVisibleRange)->SetEnd(firstVisibleNode, endFrameOffset);
}
}
return false;
}
already_AddRefed<nsIPresShell>
nsTypeAheadFind::GetPresShell()
{
if (!mPresShell)
return nullptr;
nsCOMPtr<nsIPresShell> shell = do_QueryReferent(mPresShell);
if (shell) {
nsPresContext *pc = shell->GetPresContext();
if (!pc || !pc->GetContainerWeak()) {
return nullptr;
}
}
return shell.forget();
}
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