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gecko-dev/toolkit/components/autocomplete/nsAutoCompleteController.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 "nsAutoCompleteController.h"
#include "nsAutoCompleteSimpleResult.h"
#include "nsAutoPtr.h"
#include "nsNetCID.h"
#include "nsIIOService.h"
#include "nsIServiceManager.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtils.h"
#include "nsIScriptSecurityManager.h"
#include "nsIObserverService.h"
#include "mozilla/Services.h"
#include "mozilla/Unused.h"
#include "mozilla/dom/KeyboardEventBinding.h"
#include "mozilla/dom/Event.h"
static const char *kAutoCompleteSearchCID =
"@mozilla.org/autocomplete/search;1?name=";
using namespace mozilla;
NS_IMPL_CYCLE_COLLECTION_CLASS(nsAutoCompleteController)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN(nsAutoCompleteController)
tmp->SetInput(nullptr);
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN(nsAutoCompleteController)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mInput)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSearches)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mResults)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mResultCache)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTING_ADDREF(nsAutoCompleteController)
NS_IMPL_CYCLE_COLLECTING_RELEASE(nsAutoCompleteController)
NS_INTERFACE_TABLE_HEAD(nsAutoCompleteController)
NS_INTERFACE_TABLE(nsAutoCompleteController, nsIAutoCompleteController,
nsIAutoCompleteObserver, nsITimerCallback, nsINamed)
NS_INTERFACE_TABLE_TO_MAP_SEGUE_CYCLE_COLLECTION(nsAutoCompleteController)
NS_INTERFACE_MAP_END
nsAutoCompleteController::nsAutoCompleteController()
: mDefaultIndexCompleted(false),
mPopupClosedByCompositionStart(false),
mProhibitAutoFill(false),
mUserClearedAutoFill(false),
mClearingAutoFillSearchesAgain(false),
mCompositionState(eCompositionState_None),
mSearchStatus(nsAutoCompleteController::STATUS_NONE),
mMatchCount(0),
mSearchesOngoing(0),
mSearchesFailed(0),
mImmediateSearchesCount(0),
mCompletedSelectionIndex(-1) {}
nsAutoCompleteController::~nsAutoCompleteController() { SetInput(nullptr); }
void nsAutoCompleteController::SetValueOfInputTo(const nsString &aValue,
uint16_t aReason) {
mSetValue = aValue;
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
nsresult rv = input->SetTextValueWithReason(aValue, aReason);
if (NS_FAILED(rv)) {
input->SetTextValue(aValue);
}
}
////////////////////////////////////////////////////////////////////////
//// nsIAutoCompleteController
NS_IMETHODIMP
nsAutoCompleteController::GetSearchStatus(uint16_t *aSearchStatus) {
*aSearchStatus = mSearchStatus;
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::GetMatchCount(uint32_t *aMatchCount) {
*aMatchCount = mMatchCount;
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::GetInput(nsIAutoCompleteInput **aInput) {
*aInput = mInput;
NS_IF_ADDREF(*aInput);
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::SetInitiallySelectedIndex(int32_t aSelectedIndex) {
// First forward to the popup.
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
NS_ENSURE_STATE(input);
nsCOMPtr<nsIAutoCompletePopup> popup(GetPopup());
NS_ENSURE_STATE(popup);
popup->SetSelectedIndex(aSelectedIndex);
// Now take care of internal stuff.
bool completeSelection;
if (NS_SUCCEEDED(input->GetCompleteSelectedIndex(&completeSelection)) &&
completeSelection) {
mCompletedSelectionIndex = aSelectedIndex;
}
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::SetInput(nsIAutoCompleteInput *aInput) {
// Don't do anything if the input isn't changing.
if (mInput == aInput) return NS_OK;
Unused << ResetInternalState();
if (mInput) {
mSearches.Clear();
ClosePopup();
}
mInput = aInput;
// Nothing more to do if the input was just being set to null.
if (!mInput) {
return NS_OK;
}
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
// Reset the current search string.
nsAutoString value;
input->GetTextValue(value);
SetSearchStringInternal(value);
// Since the controller can be used as a service it's important to reset this.
mClearingAutoFillSearchesAgain = false;
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::ResetInternalState() {
// Clear out the current search context
if (mInput) {
nsAutoString value;
mInput->GetTextValue(value);
// Stop all searches in case they are async.
Unused << StopSearch();
Unused << ClearResults();
SetSearchStringInternal(value);
}
mPlaceholderCompletionString.Truncate();
mDefaultIndexCompleted = false;
mProhibitAutoFill = false;
mSearchStatus = nsIAutoCompleteController::STATUS_NONE;
mMatchCount = 0;
mCompletedSelectionIndex = -1;
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::StartSearch(const nsAString &aSearchString) {
SetSearchStringInternal(aSearchString);
StartSearches();
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::HandleText(bool *_retval) {
*_retval = false;
// Note: the events occur in the following order when IME is used.
// 1. a compositionstart event(HandleStartComposition)
// 2. some input events (HandleText), eCompositionState_Composing
// 3. a compositionend event(HandleEndComposition)
// 4. an input event(HandleText), eCompositionState_Committing
// We should do nothing during composition.
if (mCompositionState == eCompositionState_Composing) {
return NS_OK;
}
bool handlingCompositionCommit =
(mCompositionState == eCompositionState_Committing);
bool popupClosedByCompositionStart = mPopupClosedByCompositionStart;
if (handlingCompositionCommit) {
mCompositionState = eCompositionState_None;
mPopupClosedByCompositionStart = false;
}
if (!mInput) {
// Stop all searches in case they are async.
StopSearch();
// Note: if now is after blur and IME end composition,
// check mInput before calling.
// See https://bugzilla.mozilla.org/show_bug.cgi?id=193544#c31
NS_ERROR(
"Called before attaching to the control or after detaching from the "
"control");
return NS_OK;
}
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
nsAutoString newValue;
input->GetTextValue(newValue);
// Stop all searches in case they are async.
StopSearch();
if (!mInput) {
// StopSearch() can call PostSearchCleanup() which might result
// in a blur event, which could null out mInput, so we need to check it
// again. See bug #395344 for more details
return NS_OK;
}
bool disabled;
input->GetDisableAutoComplete(&disabled);
NS_ENSURE_TRUE(!disabled, NS_OK);
// Usually we don't search again if the new string is the same as the last
// one. However, if this is called immediately after compositionend event, we
// need to search the same value again since the search was canceled at
// compositionstart event handler. The new string might also be the same as
// the last search if the autofilled portion was cleared. In this case, we may
// want to search again.
// Whether the user removed some text at the end.
bool userRemovedText =
newValue.Length() < mSearchString.Length() &&
Substring(mSearchString, 0, newValue.Length()).Equals(newValue);
// Whether the user is repeating the previous search.
bool repeatingPreviousSearch =
!userRemovedText && newValue.Equals(mSearchString);
mUserClearedAutoFill =
repeatingPreviousSearch &&
newValue.Length() < mPlaceholderCompletionString.Length() &&
Substring(mPlaceholderCompletionString, 0, newValue.Length())
.Equals(newValue);
bool searchAgainOnAutoFillClear =
mUserClearedAutoFill && mClearingAutoFillSearchesAgain;
if (!handlingCompositionCommit && !searchAgainOnAutoFillClear &&
newValue.Length() > 0 && repeatingPreviousSearch) {
return NS_OK;
}
if (userRemovedText || searchAgainOnAutoFillClear) {
if (userRemovedText) {
// We need to throw away previous results so we don't try to search
// through them again.
ClearResults();
}
mProhibitAutoFill = true;
mPlaceholderCompletionString.Truncate();
} else {
mProhibitAutoFill = false;
}
SetSearchStringInternal(newValue);
// Don't search if the value is empty
if (newValue.Length() == 0) {
// If autocomplete popup was closed by compositionstart event handler,
// we should reopen it forcibly even if the value is empty.
if (popupClosedByCompositionStart && handlingCompositionCommit) {
bool cancel;
HandleKeyNavigation(dom::KeyboardEvent_Binding::DOM_VK_DOWN, &cancel);
return NS_OK;
}
ClosePopup();
return NS_OK;
}
*_retval = true;
StartSearches();
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::HandleEnter(bool aIsPopupSelection,
dom::Event *aEvent, bool *_retval) {
*_retval = false;
if (!mInput) return NS_OK;
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
// allow the event through unless there is something selected in the popup
input->GetPopupOpen(_retval);
if (*_retval) {
nsCOMPtr<nsIAutoCompletePopup> popup(GetPopup());
if (popup) {
int32_t selectedIndex;
popup->GetSelectedIndex(&selectedIndex);
*_retval = selectedIndex >= 0;
}
}
// Stop the search, and handle the enter.
StopSearch();
// StopSearch() can call PostSearchCleanup() which might result
// in a blur event, which could null out mInput, so we need to check it
// again. See bug #408463 for more details
if (!mInput) {
return NS_OK;
}
EnterMatch(aIsPopupSelection, aEvent);
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::HandleEscape(bool *_retval) {
*_retval = false;
if (!mInput) return NS_OK;
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
// allow the event through if the popup is closed
input->GetPopupOpen(_retval);
// Stop all searches in case they are async.
StopSearch();
ClearResults();
RevertTextValue();
ClosePopup();
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::HandleStartComposition() {
NS_ENSURE_TRUE(mCompositionState != eCompositionState_Composing, NS_OK);
mPopupClosedByCompositionStart = false;
mCompositionState = eCompositionState_Composing;
if (!mInput) return NS_OK;
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
bool disabled;
input->GetDisableAutoComplete(&disabled);
if (disabled) return NS_OK;
// Stop all searches in case they are async.
StopSearch();
bool isOpen = false;
input->GetPopupOpen(&isOpen);
if (isOpen) {
ClosePopup();
bool stillOpen = false;
input->GetPopupOpen(&stillOpen);
mPopupClosedByCompositionStart = !stillOpen;
}
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::HandleEndComposition() {
NS_ENSURE_TRUE(mCompositionState == eCompositionState_Composing, NS_OK);
// We can't yet retrieve the committed value from the editor, since it isn't
// completely committed yet. Set mCompositionState to
// eCompositionState_Committing, so that when HandleText() is called (in
// response to the "input" event), we know that we should handle the
// committed text.
mCompositionState = eCompositionState_Committing;
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::HandleTab() {
bool cancel;
return HandleEnter(false, nullptr, &cancel);
}
NS_IMETHODIMP
nsAutoCompleteController::HandleKeyNavigation(uint32_t aKey, bool *_retval) {
// By default, don't cancel the event
*_retval = false;
if (!mInput) {
// Stop all searches in case they are async.
StopSearch();
// Note: if now is after blur and IME end composition,
// check mInput before calling.
// See https://bugzilla.mozilla.org/show_bug.cgi?id=193544#c31
NS_ERROR(
"Called before attaching to the control or after detaching from the "
"control");
return NS_OK;
}
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
nsCOMPtr<nsIAutoCompletePopup> popup(GetPopup());
NS_ENSURE_TRUE(popup != nullptr, NS_ERROR_FAILURE);
bool disabled;
input->GetDisableAutoComplete(&disabled);
NS_ENSURE_TRUE(!disabled, NS_OK);
if (aKey == dom::KeyboardEvent_Binding::DOM_VK_UP ||
aKey == dom::KeyboardEvent_Binding::DOM_VK_DOWN ||
aKey == dom::KeyboardEvent_Binding::DOM_VK_PAGE_UP ||
aKey == dom::KeyboardEvent_Binding::DOM_VK_PAGE_DOWN) {
// Prevent the input from handling up/down events, as it may move
// the cursor to home/end on some systems
*_retval = true;
bool isOpen = false;
input->GetPopupOpen(&isOpen);
if (isOpen) {
bool reverse = aKey == dom::KeyboardEvent_Binding::DOM_VK_UP ||
aKey == dom::KeyboardEvent_Binding::DOM_VK_PAGE_UP
? true
: false;
bool page = aKey == dom::KeyboardEvent_Binding::DOM_VK_PAGE_UP ||
aKey == dom::KeyboardEvent_Binding::DOM_VK_PAGE_DOWN
? true
: false;
// Fill in the value of the textbox with whatever is selected in the popup
// if the completeSelectedIndex attribute is set. We check this before
// calling SelectBy of an earlier attempt to avoid crashing.
bool completeSelection;
input->GetCompleteSelectedIndex(&completeSelection);
// The user has keyed up or down to change the selection. Stop the search
// (if there is one) now so that the results do not change while the user
// is making a selection.
Unused << StopSearch();
// Instruct the result view to scroll by the given amount and direction
popup->SelectBy(reverse, page);
if (completeSelection) {
int32_t selectedIndex;
popup->GetSelectedIndex(&selectedIndex);
if (selectedIndex >= 0) {
// A result is selected, so fill in its value
nsAutoString value;
if (NS_SUCCEEDED(GetResultValueAt(selectedIndex, false, value))) {
// If the result is the previously autofilled string, then restore
// the search string and selection that existed when the result was
// autofilled. Else, fill the result and move the caret to the end.
int32_t start;
if (value.Equals(mPlaceholderCompletionString,
nsCaseInsensitiveStringComparator())) {
start = mSearchString.Length();
value = mPlaceholderCompletionString;
SetValueOfInputTo(
value,
nsIAutoCompleteInput::TEXTVALUE_REASON_COMPLETEDEFAULT);
} else {
start = value.Length();
SetValueOfInputTo(
value,
nsIAutoCompleteInput::TEXTVALUE_REASON_COMPLETESELECTED);
}
input->SelectTextRange(start, value.Length());
}
mCompletedSelectionIndex = selectedIndex;
} else {
// Nothing is selected, so fill in the last typed value
SetValueOfInputTo(mSearchString,
nsIAutoCompleteInput::TEXTVALUE_REASON_REVERT);
input->SelectTextRange(mSearchString.Length(),
mSearchString.Length());
mCompletedSelectionIndex = -1;
}
}
} else {
#ifdef XP_MACOSX
// on Mac, only show the popup if the caret is at the start or end of
// the input and there is no selection, so that the default defined key
// shortcuts for up and down move to the beginning and end of the field
// otherwise.
int32_t start, end;
if (aKey == dom::KeyboardEvent_Binding::DOM_VK_UP) {
input->GetSelectionStart(&start);
input->GetSelectionEnd(&end);
if (start > 0 || start != end) *_retval = false;
} else if (aKey == dom::KeyboardEvent_Binding::DOM_VK_DOWN) {
nsAutoString text;
input->GetTextValue(text);
input->GetSelectionStart(&start);
input->GetSelectionEnd(&end);
if (start != end || end < (int32_t)text.Length()) *_retval = false;
}
#endif
if (*_retval) {
nsAutoString oldSearchString;
// Open the popup if there has been a previous search, or else kick off
// a new search
if (!mResults.IsEmpty() &&
NS_SUCCEEDED(mResults[0]->GetSearchString(oldSearchString)) &&
oldSearchString.Equals(mSearchString,
nsCaseInsensitiveStringComparator())) {
if (mMatchCount) {
OpenPopup();
}
} else {
// Stop all searches in case they are async.
StopSearch();
if (!mInput) {
// StopSearch() can call PostSearchCleanup() which might result
// in a blur event, which could null out mInput, so we need to check
// it again. See bug #395344 for more details
return NS_OK;
}
// Some script may have changed the value of the text field since our
// last keypress or after our focus handler and we don't want to
// search for a stale string.
nsAutoString value;
input->GetTextValue(value);
SetSearchStringInternal(value);
StartSearches();
}
}
}
} else if (aKey == dom::KeyboardEvent_Binding::DOM_VK_LEFT ||
aKey == dom::KeyboardEvent_Binding::DOM_VK_RIGHT
#ifndef XP_MACOSX
|| aKey == dom::KeyboardEvent_Binding::DOM_VK_HOME
#endif
) {
// The user hit a text-navigation key.
bool isOpen = false;
input->GetPopupOpen(&isOpen);
// If minresultsforpopup > 1 and there's less matches than the minimum
// required, the popup is not open, but the search suggestion is showing
// inline, so we should proceed as if we had the popup.
uint32_t minResultsForPopup;
input->GetMinResultsForPopup(&minResultsForPopup);
if (isOpen || (mMatchCount > 0 && mMatchCount < minResultsForPopup)) {
// For completeSelectedIndex autocomplete fields, if the popup shouldn't
// close when the caret is moved, don't adjust the text value or caret
// position.
bool completeSelection;
input->GetCompleteSelectedIndex(&completeSelection);
if (isOpen) {
bool noRollup;
input->GetNoRollupOnCaretMove(&noRollup);
if (noRollup) {
if (completeSelection) {
return NS_OK;
}
}
}
int32_t selectionEnd;
input->GetSelectionEnd(&selectionEnd);
int32_t selectionStart;
input->GetSelectionStart(&selectionStart);
bool shouldCompleteSelection =
(uint32_t)selectionEnd == mPlaceholderCompletionString.Length() &&
selectionStart < selectionEnd;
int32_t selectedIndex;
popup->GetSelectedIndex(&selectedIndex);
bool completeDefaultIndex;
input->GetCompleteDefaultIndex(&completeDefaultIndex);
if (completeDefaultIndex && shouldCompleteSelection) {
// We usually try to preserve the casing of what user has typed, but
// if he wants to autocomplete, we will replace the value with the
// actual autocomplete result. Note that the autocomplete input can also
// be showing e.g. "bar >> foo bar" if the search matched "bar", a
// word not at the start of the full value "foo bar".
// The user wants explicitely to use that result, so this ensures
// association of the result with the autocompleted text.
nsAutoString value;
nsAutoString inputValue;
input->GetTextValue(inputValue);
if (NS_SUCCEEDED(GetDefaultCompleteValue(-1, false, value))) {
nsAutoString suggestedValue;
int32_t pos = inputValue.Find(" >> ");
if (pos > 0) {
inputValue.Right(suggestedValue, inputValue.Length() - pos - 4);
} else {
suggestedValue = inputValue;
}
if (value.Equals(suggestedValue,
nsCaseInsensitiveStringComparator())) {
SetValueOfInputTo(
value, nsIAutoCompleteInput::TEXTVALUE_REASON_COMPLETEDEFAULT);
input->SelectTextRange(value.Length(), value.Length());
}
}
} else if (!completeDefaultIndex && !completeSelection &&
selectedIndex >= 0) {
// The pop-up is open and has a selection, take its value
nsAutoString value;
if (NS_SUCCEEDED(GetResultValueAt(selectedIndex, false, value))) {
SetValueOfInputTo(
value, nsIAutoCompleteInput::TEXTVALUE_REASON_COMPLETESELECTED);
input->SelectTextRange(value.Length(), value.Length());
}
}
// Close the pop-up even if nothing was selected
ClearSearchTimer();
ClosePopup();
}
// Update last-searched string to the current input, since the input may
// have changed. Without this, subsequent backspaces look like text
// additions, not text deletions.
nsAutoString value;
input->GetTextValue(value);
SetSearchStringInternal(value);
}
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::HandleDelete(bool *_retval) {
*_retval = false;
if (!mInput) return NS_OK;
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
bool isOpen = false;
input->GetPopupOpen(&isOpen);
if (!isOpen || mMatchCount == 0) {
// Nothing left to delete, proceed as normal
bool unused = false;
HandleText(&unused);
return NS_OK;
}
nsCOMPtr<nsIAutoCompletePopup> popup(GetPopup());
NS_ENSURE_TRUE(popup, NS_ERROR_FAILURE);
int32_t index, searchIndex, matchIndex;
popup->GetSelectedIndex(&index);
if (index == -1) {
// No match is selected in the list
bool unused = false;
HandleText(&unused);
return NS_OK;
}
MatchIndexToSearch(index, &searchIndex, &matchIndex);
NS_ENSURE_TRUE(searchIndex >= 0 && matchIndex >= 0, NS_ERROR_FAILURE);
nsIAutoCompleteResult *result = mResults.SafeObjectAt(searchIndex);
NS_ENSURE_TRUE(result, NS_ERROR_FAILURE);
nsAutoString search;
input->GetSearchParam(search);
// Clear the match in our result and in the DB.
result->RemoveValueAt(matchIndex, true);
--mMatchCount;
// We removed it, so make sure we cancel the event that triggered this call.
*_retval = true;
// Unselect the current item.
popup->SetSelectedIndex(-1);
// Adjust index, if needed.
MOZ_ASSERT(index >= 0); // We verified this above, after MatchIndexToSearch.
if (static_cast<uint32_t>(index) >= mMatchCount) index = mMatchCount - 1;
if (mMatchCount > 0) {
// There are still matches in the popup, select the current index again.
popup->SetSelectedIndex(index);
// Complete to the new current value.
bool shouldComplete = false;
input->GetCompleteDefaultIndex(&shouldComplete);
if (shouldComplete) {
nsAutoString value;
if (NS_SUCCEEDED(GetResultValueAt(index, false, value))) {
CompleteValue(value);
}
}
// Invalidate the popup.
popup->Invalidate(nsIAutoCompletePopup::INVALIDATE_REASON_DELETE);
} else {
// Nothing left in the popup, clear any pending search timers and
// close the popup.
ClearSearchTimer();
uint32_t minResults;
input->GetMinResultsForPopup(&minResults);
if (minResults) {
ClosePopup();
}
}
return NS_OK;
}
nsresult nsAutoCompleteController::GetResultAt(int32_t aIndex,
nsIAutoCompleteResult **aResult,
int32_t *aMatchIndex) {
int32_t searchIndex;
MatchIndexToSearch(aIndex, &searchIndex, aMatchIndex);
NS_ENSURE_TRUE(searchIndex >= 0 && *aMatchIndex >= 0, NS_ERROR_FAILURE);
*aResult = mResults.SafeObjectAt(searchIndex);
NS_ENSURE_TRUE(*aResult, NS_ERROR_FAILURE);
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::GetValueAt(int32_t aIndex, nsAString &_retval) {
GetResultLabelAt(aIndex, _retval);
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::GetLabelAt(int32_t aIndex, nsAString &_retval) {
GetResultLabelAt(aIndex, _retval);
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::GetCommentAt(int32_t aIndex, nsAString &_retval) {
int32_t matchIndex;
nsIAutoCompleteResult *result;
nsresult rv = GetResultAt(aIndex, &result, &matchIndex);
NS_ENSURE_SUCCESS(rv, rv);
return result->GetCommentAt(matchIndex, _retval);
}
NS_IMETHODIMP
nsAutoCompleteController::GetStyleAt(int32_t aIndex, nsAString &_retval) {
int32_t matchIndex;
nsIAutoCompleteResult *result;
nsresult rv = GetResultAt(aIndex, &result, &matchIndex);
NS_ENSURE_SUCCESS(rv, rv);
return result->GetStyleAt(matchIndex, _retval);
}
NS_IMETHODIMP
nsAutoCompleteController::GetImageAt(int32_t aIndex, nsAString &_retval) {
int32_t matchIndex;
nsIAutoCompleteResult *result;
nsresult rv = GetResultAt(aIndex, &result, &matchIndex);
NS_ENSURE_SUCCESS(rv, rv);
return result->GetImageAt(matchIndex, _retval);
}
NS_IMETHODIMP
nsAutoCompleteController::GetFinalCompleteValueAt(int32_t aIndex,
nsAString &_retval) {
int32_t matchIndex;
nsIAutoCompleteResult *result;
nsresult rv = GetResultAt(aIndex, &result, &matchIndex);
NS_ENSURE_SUCCESS(rv, rv);
return result->GetFinalCompleteValueAt(matchIndex, _retval);
}
NS_IMETHODIMP
nsAutoCompleteController::SetSearchString(const nsAString &aSearchString) {
SetSearchStringInternal(aSearchString);
return NS_OK;
}
NS_IMETHODIMP
nsAutoCompleteController::GetSearchString(nsAString &aSearchString) {
aSearchString = mSearchString;
return NS_OK;
}
////////////////////////////////////////////////////////////////////////
//// nsIAutoCompleteObserver
NS_IMETHODIMP
nsAutoCompleteController::OnSearchResult(nsIAutoCompleteSearch *aSearch,
nsIAutoCompleteResult *aResult) {
MOZ_ASSERT(mSearchesOngoing > 0 && mSearches.Contains(aSearch));
uint16_t result = 0;
if (aResult) {
aResult->GetSearchResult(&result);
}
// If our results are incremental, the search is still ongoing.
if (result != nsIAutoCompleteResult::RESULT_SUCCESS_ONGOING &&
result != nsIAutoCompleteResult::RESULT_NOMATCH_ONGOING) {
--mSearchesOngoing;
}
// Look up the index of the search which is returning.
for (uint32_t i = 0; i < mSearches.Length(); ++i) {
if (mSearches[i] == aSearch) {
ProcessResult(i, aResult);
}
}
if (mSearchesOngoing == 0) {
// If this is the last search to return, cleanup.
PostSearchCleanup();
}
return NS_OK;
}
////////////////////////////////////////////////////////////////////////
//// nsITimerCallback
NS_IMETHODIMP
nsAutoCompleteController::Notify(nsITimer *timer) {
mTimer = nullptr;
if (mImmediateSearchesCount == 0) {
// If there were no immediate searches, BeforeSearches has not yet been
// called, so do it now.
nsresult rv = BeforeSearches();
if (NS_FAILED(rv)) return rv;
}
StartSearch(nsIAutoCompleteSearchDescriptor::SEARCH_TYPE_DELAYED);
AfterSearches();
return NS_OK;
}
////////////////////////////////////////////////////////////////////////
//// nsINamed
NS_IMETHODIMP
nsAutoCompleteController::GetName(nsACString &aName) {
aName.AssignLiteral("nsAutoCompleteController");
return NS_OK;
}
////////////////////////////////////////////////////////////////////////
//// nsAutoCompleteController
nsresult nsAutoCompleteController::OpenPopup() {
uint32_t minResults;
mInput->GetMinResultsForPopup(&minResults);
if (mMatchCount >= minResults) {
return mInput->SetPopupOpen(true);
}
return NS_OK;
}
nsresult nsAutoCompleteController::ClosePopup() {
if (!mInput) {
return NS_OK;
}
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
bool isOpen = false;
input->GetPopupOpen(&isOpen);
if (!isOpen) return NS_OK;
nsCOMPtr<nsIAutoCompletePopup> popup(GetPopup());
NS_ENSURE_TRUE(popup != nullptr, NS_ERROR_FAILURE);
MOZ_ALWAYS_SUCCEEDS(input->SetPopupOpen(false));
return popup->SetSelectedIndex(-1);
}
nsresult nsAutoCompleteController::BeforeSearches() {
NS_ENSURE_STATE(mInput);
mSearchStatus = nsIAutoCompleteController::STATUS_SEARCHING;
mDefaultIndexCompleted = false;
// ClearResults will clear the mResults array, but we should pass the previous
// result to each search to allow reusing it. So we temporarily cache the
// current results until AfterSearches().
if (!mResultCache.AppendObjects(mResults)) {
return NS_ERROR_OUT_OF_MEMORY;
}
ClearResults(true);
mSearchesOngoing = mSearches.Length();
mSearchesFailed = 0;
// notify the input that the search is beginning
mInput->OnSearchBegin();
return NS_OK;
}
nsresult nsAutoCompleteController::StartSearch(uint16_t aSearchType) {
NS_ENSURE_STATE(mInput);
nsCOMPtr<nsIAutoCompleteInput> input = mInput;
// Iterate a copy of |mSearches| so that we don't run into trouble if the
// array is mutated while we're still in the loop. An nsIAutoCompleteSearch
// implementation could synchronously start a new search when StartSearch()
// is called and that would lead to assertions down the way.
nsCOMArray<nsIAutoCompleteSearch> searchesCopy(mSearches);
for (uint32_t i = 0; i < searchesCopy.Length(); ++i) {
nsCOMPtr<nsIAutoCompleteSearch> search = searchesCopy[i];
// Filter on search type. Not all the searches implement this interface,
// in such a case just consider them delayed.
uint16_t searchType = nsIAutoCompleteSearchDescriptor::SEARCH_TYPE_DELAYED;
nsCOMPtr<nsIAutoCompleteSearchDescriptor> searchDesc =
do_QueryInterface(search);
if (searchDesc) searchDesc->GetSearchType(&searchType);
if (searchType != aSearchType) continue;
nsIAutoCompleteResult *result = mResultCache.SafeObjectAt(i);
if (result) {
uint16_t searchResult;
result->GetSearchResult(&searchResult);
if (searchResult != nsIAutoCompleteResult::RESULT_SUCCESS &&
searchResult != nsIAutoCompleteResult::RESULT_SUCCESS_ONGOING &&
searchResult != nsIAutoCompleteResult::RESULT_NOMATCH)
result = nullptr;
}
nsAutoString searchParam;
nsresult rv = input->GetSearchParam(searchParam);
if (NS_FAILED(rv)) return rv;
// FormFill expects the searchParam to only contain the input element id,
// other consumers may have other expectations, so this modifies it only
// for new consumers handling autoFill by themselves.
if (mProhibitAutoFill && mClearingAutoFillSearchesAgain) {
searchParam.AppendLiteral(" prohibit-autofill");
}
uint32_t userContextId;
rv = input->GetUserContextId(&userContextId);
if (NS_SUCCEEDED(rv) &&
userContextId != nsIScriptSecurityManager::DEFAULT_USER_CONTEXT_ID) {
searchParam.AppendLiteral(" user-context-id:");
searchParam.AppendInt(userContextId, 10);
}
rv = search->StartSearch(mSearchString, searchParam, result,
static_cast<nsIAutoCompleteObserver *>(this));
if (NS_FAILED(rv)) {
++mSearchesFailed;
MOZ_ASSERT(mSearchesOngoing > 0);
--mSearchesOngoing;
}
// Because of the joy of nested event loops (which can easily happen when
// some code uses a generator for an asynchronous AutoComplete search),
// nsIAutoCompleteSearch::StartSearch might cause us to be detached from our
// input field. The next time we iterate, we'd be touching something that
// we shouldn't be, and result in a crash.
if (!mInput) {
// The search operation has been finished.
return NS_OK;
}
}
return NS_OK;
}
void nsAutoCompleteController::AfterSearches() {
mResultCache.Clear();
if (mSearchesFailed == mSearches.Length()) PostSearchCleanup();
}
NS_IMETHODIMP
nsAutoCompleteController::StopSearch() {
// Stop the timer if there is one
ClearSearchTimer();
// Stop any ongoing asynchronous searches
if (mSearchStatus == nsIAutoCompleteController::STATUS_SEARCHING) {
for (uint32_t i = 0; i < mSearches.Length(); ++i) {
nsCOMPtr<nsIAutoCompleteSearch> search = mSearches[i];
search->StopSearch();
}
mSearchesOngoing = 0;
// since we were searching, but now we've stopped,
// we need to call PostSearchCleanup()
PostSearchCleanup();
}
return NS_OK;
}
void nsAutoCompleteController::MaybeCompletePlaceholder() {
MOZ_ASSERT(mInput);
if (!mInput) { // or mInput depending on what you choose
MOZ_ASSERT_UNREACHABLE("Input should always be valid at this point");
return;
}
int32_t selectionStart;
mInput->GetSelectionStart(&selectionStart);
int32_t selectionEnd;
mInput->GetSelectionEnd(&selectionEnd);
// Check if the current input should be completed with the placeholder string
// from the last completion until the actual search results come back.
// The new input string needs to be compatible with the last completed string.
// E.g. if the new value is "fob", but the last completion was "foobar",
// then the last completion is incompatible.
// If the search string is the same as the last completion value, then don't
// complete the value again (this prevents completion to happen e.g. if the
// cursor is moved and StartSeaches() is invoked).
// In addition, the selection must be at the end of the current input to
// trigger the placeholder completion.
bool usePlaceholderCompletion =
!mUserClearedAutoFill && !mPlaceholderCompletionString.IsEmpty() &&
mPlaceholderCompletionString.Length() > mSearchString.Length() &&
selectionEnd == selectionStart &&
selectionEnd == (int32_t)mSearchString.Length() &&
StringBeginsWith(mPlaceholderCompletionString, mSearchString,
nsCaseInsensitiveStringComparator());
if (usePlaceholderCompletion) {
CompleteValue(mPlaceholderCompletionString);
} else {
mPlaceholderCompletionString.Truncate();
}
}
nsresult nsAutoCompleteController::StartSearches() {
// Don't create a new search timer if we're already waiting for one to fire.
// If we don't check for this, we won't be able to cancel the original timer
// and may crash when it fires (bug 236659).
if (mTimer || !mInput) return NS_OK;
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
if (!mSearches.Length()) {
// Initialize our list of search objects
uint32_t searchCount;
input->GetSearchCount(&searchCount);
mResults.SetCapacity(searchCount);
mSearches.SetCapacity(searchCount);
mImmediateSearchesCount = 0;
const char *searchCID = kAutoCompleteSearchCID;
for (uint32_t i = 0; i < searchCount; ++i) {
// Use the search name to create the contract id string for the search
// service
nsAutoCString searchName;
input->GetSearchAt(i, searchName);
nsAutoCString cid(searchCID);
cid.Append(searchName);
// Use the created cid to get a pointer to the search service and store it
// for later
nsCOMPtr<nsIAutoCompleteSearch> search = do_GetService(cid.get());
if (search) {
mSearches.AppendObject(search);
// Count immediate searches.
nsCOMPtr<nsIAutoCompleteSearchDescriptor> searchDesc =
do_QueryInterface(search);
if (searchDesc) {
uint16_t searchType =
nsIAutoCompleteSearchDescriptor::SEARCH_TYPE_DELAYED;
if (NS_SUCCEEDED(searchDesc->GetSearchType(&searchType)) &&
searchType ==
nsIAutoCompleteSearchDescriptor::SEARCH_TYPE_IMMEDIATE) {
mImmediateSearchesCount++;
}
if (!mClearingAutoFillSearchesAgain) {
searchDesc->GetClearingAutoFillSearchesAgain(
&mClearingAutoFillSearchesAgain);
}
}
}
}
}
// Check if the current input should be completed with the placeholder string
// from the last completion until the actual search results come back.
MaybeCompletePlaceholder();
// Get the timeout for delayed searches.
uint32_t timeout;
input->GetTimeout(&timeout);
uint32_t immediateSearchesCount = mImmediateSearchesCount;
if (timeout == 0) {
// All the searches should be executed immediately.
immediateSearchesCount = mSearches.Length();
}
if (immediateSearchesCount > 0) {
nsresult rv = BeforeSearches();
if (NS_FAILED(rv)) return rv;
StartSearch(nsIAutoCompleteSearchDescriptor::SEARCH_TYPE_IMMEDIATE);
if (mSearches.Length() == immediateSearchesCount) {
// Either all searches are immediate, or the timeout is 0. In the
// latter case we still have to execute the delayed searches, otherwise
// this will be a no-op.
StartSearch(nsIAutoCompleteSearchDescriptor::SEARCH_TYPE_DELAYED);
// All the searches have been started, just finish.
AfterSearches();
return NS_OK;
}
}
MOZ_ASSERT(timeout > 0, "Trying to delay searches with a 0 timeout!");
// Now start the delayed searches.
return NS_NewTimerWithCallback(getter_AddRefs(mTimer), this, timeout,
nsITimer::TYPE_ONE_SHOT);
}
nsresult nsAutoCompleteController::ClearSearchTimer() {
if (mTimer) {
mTimer->Cancel();
mTimer = nullptr;
}
return NS_OK;
}
nsresult nsAutoCompleteController::EnterMatch(bool aIsPopupSelection,
dom::Event *aEvent) {
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
nsCOMPtr<nsIAutoCompletePopup> popup(GetPopup());
NS_ENSURE_TRUE(popup != nullptr, NS_ERROR_FAILURE);
bool forceComplete;
input->GetForceComplete(&forceComplete);
// Ask the popup if it wants to enter a special value into the textbox
nsAutoString value;
popup->GetOverrideValue(value);
if (value.IsEmpty()) {
bool shouldComplete;
input->GetCompleteDefaultIndex(&shouldComplete);
bool completeSelection;
input->GetCompleteSelectedIndex(&completeSelection);
int32_t selectedIndex;
popup->GetSelectedIndex(&selectedIndex);
if (selectedIndex >= 0) {
nsAutoString inputValue;
input->GetTextValue(inputValue);
if (aIsPopupSelection || !completeSelection) {
// We need to fill-in the value if:
// * completeselectedindex is false
// * A match in the popup was confirmed
GetResultValueAt(selectedIndex, true, value);
} else if (mDefaultIndexCompleted &&
inputValue.Equals(mPlaceholderCompletionString,
nsCaseInsensitiveStringComparator())) {
// We also need to fill-in the value if the default index completion was
// confirmed, though we cannot use the selectedIndex cause the selection
// may have been changed by the mouse in the meanwhile.
GetFinalDefaultCompleteValue(value);
} else if (mCompletedSelectionIndex != -1) {
// If completeselectedindex is true, and EnterMatch was not invoked by
// mouse-clicking a match (for example the user pressed Enter),
// don't fill in the value as it will have already been filled in as
// needed, unless the selected match has a final complete value that
// differs from the user-facing value.
nsAutoString finalValue;
GetResultValueAt(mCompletedSelectionIndex, true, finalValue);
if (!inputValue.Equals(finalValue)) {
value = finalValue;
}
}
} else if (shouldComplete) {
// We usually try to preserve the casing of what user has typed, but
// if he wants to autocomplete, we will replace the value with the
// actual autocomplete result.
// The user wants explicitely to use that result, so this ensures
// association of the result with the autocompleted text.
nsAutoString defaultIndexValue;
if (NS_SUCCEEDED(GetFinalDefaultCompleteValue(defaultIndexValue)))
value = defaultIndexValue;
}
if (forceComplete && value.IsEmpty() && shouldComplete) {
// See if inputValue is one of the autocomplete results. It can be an
// identical value, or if it matched the middle of a result it can be
// something like "bar >> foobar" (user entered bar and foobar is
// the result value).
// If the current search matches one of the autocomplete results, we
// should use that result, and not overwrite it with the default value.
// It's indeed possible EnterMatch gets called a second time (for example
// by the blur handler) and it should not overwrite the current match.
nsAutoString inputValue;
input->GetTextValue(inputValue);
nsAutoString suggestedValue;
int32_t pos = inputValue.Find(" >> ");
if (pos > 0) {
inputValue.Right(suggestedValue, inputValue.Length() - pos - 4);
} else {
suggestedValue = inputValue;
}
for (uint32_t i = 0; i < mResults.Length(); ++i) {
nsIAutoCompleteResult *result = mResults[i];
if (result) {
uint32_t matchCount = 0;
result->GetMatchCount(&matchCount);
for (uint32_t j = 0; j < matchCount; ++j) {
nsAutoString matchValue;
result->GetValueAt(j, matchValue);
if (suggestedValue.Equals(matchValue,
nsCaseInsensitiveStringComparator())) {
nsAutoString finalMatchValue;
result->GetFinalCompleteValueAt(j, finalMatchValue);
value = finalMatchValue;
break;
}
}
}
}
// The value should have been set at this point. If not, then it's not
// a value that should be autocompleted.
} else if (forceComplete && value.IsEmpty() && completeSelection) {
// Since nothing was selected, and forceComplete is specified, that means
// we have to find the first default match and enter it instead.
for (uint32_t i = 0; i < mResults.Length(); ++i) {
nsIAutoCompleteResult *result = mResults[i];
if (result) {
int32_t defaultIndex;
result->GetDefaultIndex(&defaultIndex);
if (defaultIndex >= 0) {
result->GetFinalCompleteValueAt(defaultIndex, value);
break;
}
}
}
}
}
nsCOMPtr<nsIObserverService> obsSvc = services::GetObserverService();
NS_ENSURE_STATE(obsSvc);
obsSvc->NotifyObservers(input, "autocomplete-will-enter-text", nullptr);
if (!value.IsEmpty()) {
SetValueOfInputTo(value, nsIAutoCompleteInput::TEXTVALUE_REASON_ENTERMATCH);
input->SelectTextRange(value.Length(), value.Length());
SetSearchStringInternal(value);
}
obsSvc->NotifyObservers(input, "autocomplete-did-enter-text", nullptr);
ClosePopup();
bool cancel;
input->OnTextEntered(aEvent, &cancel);
return NS_OK;
}
nsresult nsAutoCompleteController::RevertTextValue() {
// StopSearch() can call PostSearchCleanup() which might result
// in a blur event, which could null out mInput, so we need to check it
// again. See bug #408463 for more details
if (!mInput) return NS_OK;
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
// If current input value is different from what we have set, it means
// somebody modified the value like JS of the web content. In such case,
// we shouldn't overwrite it with the old value.
nsAutoString currentValue;
input->GetTextValue(currentValue);
if (currentValue != mSetValue) {
SetSearchStringInternal(currentValue);
return NS_OK;
}
bool cancel = false;
input->OnTextReverted(&cancel);
if (!cancel) {
nsCOMPtr<nsIObserverService> obsSvc = services::GetObserverService();
NS_ENSURE_STATE(obsSvc);
obsSvc->NotifyObservers(input, "autocomplete-will-revert-text", nullptr);
// Don't change the value if it is the same to prevent sending useless
// events. NOTE: how can |RevertTextValue| be called with inputValue !=
// oldValue?
if (mSearchString != currentValue) {
SetValueOfInputTo(mSearchString,
nsIAutoCompleteInput::TEXTVALUE_REASON_REVERT);
}
obsSvc->NotifyObservers(input, "autocomplete-did-revert-text", nullptr);
}
return NS_OK;
}
nsresult nsAutoCompleteController::ProcessResult(
int32_t aSearchIndex, nsIAutoCompleteResult *aResult) {
NS_ENSURE_STATE(mInput);
MOZ_ASSERT(aResult, "ProcessResult should always receive a result");
NS_ENSURE_ARG(aResult);
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
uint16_t searchResult = 0;
aResult->GetSearchResult(&searchResult);
// The following code supports incremental updating results in 2 ways:
// * The search may reuse the same result, just by adding entries to it.
// * The search may send a new result every time. In this case we merge
// the results and proceed on the same code path as before.
// This way both mSearches and mResults can be indexed by the search index,
// cause we'll always have only one result per search.
if (mResults.IndexOf(aResult) == -1) {
nsIAutoCompleteResult *oldResult = mResults.SafeObjectAt(aSearchIndex);
if (oldResult) {
MOZ_ASSERT(false,
"Passing new matches to OnSearchResult with a new "
"nsIAutoCompleteResult every time is deprecated, please "
"update the same result until the search is done");
// Build a new nsIAutocompleteSimpleResult and merge results into it.
RefPtr<nsAutoCompleteSimpleResult> mergedResult =
new nsAutoCompleteSimpleResult();
mergedResult->AppendResult(oldResult);
mergedResult->AppendResult(aResult);
mResults.ReplaceObjectAt(mergedResult, aSearchIndex);
} else {
// This inserts and grows the array if needed.
mResults.ReplaceObjectAt(aResult, aSearchIndex);
}
}
// When found the result should have the same index as the search.
MOZ_ASSERT_IF(mResults.IndexOf(aResult) != -1,
mResults.IndexOf(aResult) == aSearchIndex);
MOZ_ASSERT(mResults.Count() >= aSearchIndex + 1,
"aSearchIndex should always be valid for mResults");
uint32_t oldMatchCount = mMatchCount;
// If the search failed, increase the match count to include the error
// description.
if (searchResult == nsIAutoCompleteResult::RESULT_FAILURE) {
nsAutoString error;
aResult->GetErrorDescription(error);
if (!error.IsEmpty()) {
++mMatchCount;
}
} else if (searchResult == nsIAutoCompleteResult::RESULT_SUCCESS ||
searchResult == nsIAutoCompleteResult::RESULT_SUCCESS_ONGOING) {
// Increase the match count for all matches in this result.
uint32_t totalMatchCount = 0;
for (uint32_t i = 0; i < mResults.Length(); i++) {
nsIAutoCompleteResult *result = mResults.SafeObjectAt(i);
if (result) {
uint32_t matchCount = 0;
result->GetMatchCount(&matchCount);
totalMatchCount += matchCount;
}
}
uint32_t delta = totalMatchCount - oldMatchCount;
mMatchCount += delta;
}
// Try to autocomplete the default index for this search.
// Do this before invalidating so the binding knows about it.
CompleteDefaultIndex(aSearchIndex);
// Refresh the popup view to display the new search results
nsCOMPtr<nsIAutoCompletePopup> popup(GetPopup());
NS_ENSURE_TRUE(popup != nullptr, NS_ERROR_FAILURE);
popup->Invalidate(nsIAutoCompletePopup::INVALIDATE_REASON_NEW_RESULT);
uint32_t minResults;
input->GetMinResultsForPopup(&minResults);
// Make sure the popup is open, if necessary, since we now have at least one
// search result ready to display. Don't force the popup closed if we might
// get results in the future to avoid unnecessarily canceling searches.
if (mMatchCount || !minResults) {
OpenPopup();
} else if (mSearchesOngoing == 0) {
ClosePopup();
}
return NS_OK;
}
nsresult nsAutoCompleteController::PostSearchCleanup() {
NS_ENSURE_STATE(mInput);
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
uint32_t minResults;
input->GetMinResultsForPopup(&minResults);
if (mMatchCount || minResults == 0) {
OpenPopup();
if (mMatchCount)
mSearchStatus = nsIAutoCompleteController::STATUS_COMPLETE_MATCH;
else
mSearchStatus = nsIAutoCompleteController::STATUS_COMPLETE_NO_MATCH;
} else {
mSearchStatus = nsIAutoCompleteController::STATUS_COMPLETE_NO_MATCH;
ClosePopup();
}
// notify the input that the search is complete
input->OnSearchComplete();
return NS_OK;
}
nsresult nsAutoCompleteController::ClearResults(bool aIsSearching) {
int32_t oldMatchCount = mMatchCount;
mMatchCount = 0;
mResults.Clear();
if (oldMatchCount != 0) {
if (mInput) {
nsCOMPtr<nsIAutoCompletePopup> popup(GetPopup());
NS_ENSURE_TRUE(popup != nullptr, NS_ERROR_FAILURE);
// Clear the selection.
popup->SetSelectedIndex(-1);
}
}
return NS_OK;
}
nsresult nsAutoCompleteController::CompleteDefaultIndex(int32_t aResultIndex) {
if (mDefaultIndexCompleted || mProhibitAutoFill ||
mSearchString.Length() == 0 || !mInput)
return NS_OK;
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
int32_t selectionStart;
input->GetSelectionStart(&selectionStart);
int32_t selectionEnd;
input->GetSelectionEnd(&selectionEnd);
bool isPlaceholderSelected =
selectionEnd == (int32_t)mPlaceholderCompletionString.Length() &&
selectionStart == (int32_t)mSearchString.Length() &&
StringBeginsWith(mPlaceholderCompletionString, mSearchString,
nsCaseInsensitiveStringComparator());
// Don't try to automatically complete to the first result if there's already
// a selection or the cursor isn't at the end of the input. In case the
// selection is from the current placeholder completion value, then still
// automatically complete.
if (!isPlaceholderSelected &&
(selectionEnd != selectionStart ||
selectionEnd != (int32_t)mSearchString.Length()))
return NS_OK;
bool shouldComplete;
input->GetCompleteDefaultIndex(&shouldComplete);
if (!shouldComplete) return NS_OK;
nsAutoString resultValue;
if (NS_SUCCEEDED(GetDefaultCompleteValue(aResultIndex, true, resultValue))) {
CompleteValue(resultValue);
mDefaultIndexCompleted = true;
} else {
// Reset the search string again, in case it was completed with
// mPlaceholderCompletionString, but the actually received result doesn't
// have a default index result. Only reset the input when necessary, to
// avoid triggering unnecessary new searches.
nsAutoString inputValue;
input->GetTextValue(inputValue);
if (!inputValue.Equals(mSearchString)) {
SetValueOfInputTo(mSearchString,
nsIAutoCompleteInput::TEXTVALUE_REASON_REVERT);
input->SelectTextRange(mSearchString.Length(), mSearchString.Length());
}
mPlaceholderCompletionString.Truncate();
}
return NS_OK;
}
nsresult nsAutoCompleteController::GetDefaultCompleteResult(
int32_t aResultIndex, nsIAutoCompleteResult **_result,
int32_t *_defaultIndex) {
*_defaultIndex = -1;
int32_t resultIndex = aResultIndex;
// If a result index was not provided, find the first defaultIndex result.
for (int32_t i = 0; resultIndex < 0 && i < mResults.Count(); ++i) {
nsIAutoCompleteResult *result = mResults.SafeObjectAt(i);
if (result && NS_SUCCEEDED(result->GetDefaultIndex(_defaultIndex)) &&
*_defaultIndex >= 0) {
resultIndex = i;
}
}
if (resultIndex < 0) {
return NS_ERROR_FAILURE;
}
*_result = mResults.SafeObjectAt(resultIndex);
NS_ENSURE_TRUE(*_result, NS_ERROR_FAILURE);
if (*_defaultIndex < 0) {
// The search must explicitly provide a default index in order
// for us to be able to complete.
(*_result)->GetDefaultIndex(_defaultIndex);
}
if (*_defaultIndex < 0) {
// We were given a result index, but that result doesn't want to
// be autocompleted.
return NS_ERROR_FAILURE;
}
// If the result wrongly notifies a RESULT_SUCCESS with no matches, or
// provides a defaultIndex greater than its matchCount, avoid trying to
// complete to an empty value.
uint32_t matchCount = 0;
(*_result)->GetMatchCount(&matchCount);
// Here defaultIndex is surely non-negative, so can be cast to unsigned.
if ((uint32_t)(*_defaultIndex) >= matchCount) {
return NS_ERROR_FAILURE;
}
return NS_OK;
}
nsresult nsAutoCompleteController::GetDefaultCompleteValue(int32_t aResultIndex,
bool aPreserveCasing,
nsAString &_retval) {
nsIAutoCompleteResult *result;
int32_t defaultIndex = -1;
nsresult rv = GetDefaultCompleteResult(aResultIndex, &result, &defaultIndex);
if (NS_FAILED(rv)) return rv;
nsAutoString resultValue;
result->GetValueAt(defaultIndex, resultValue);
if (aPreserveCasing &&
StringBeginsWith(resultValue, mSearchString,
nsCaseInsensitiveStringComparator())) {
// We try to preserve user casing, otherwise we would end up changing
// the case of what he typed, if we have a result with a different casing.
// For example if we have result "Test", and user starts writing "tuna",
// after digiting t, we would convert it to T trying to autocomplete "Test".
// We will still complete to cased "Test" if the user explicitely choose
// that result, by either selecting it in the results popup, or with
// keyboard navigation or if autocompleting in the middle.
nsAutoString casedResultValue;
casedResultValue.Assign(mSearchString);
// Use what the user has typed so far.
casedResultValue.Append(
Substring(resultValue, mSearchString.Length(), resultValue.Length()));
_retval = casedResultValue;
} else
_retval = resultValue;
return NS_OK;
}
nsresult nsAutoCompleteController::GetFinalDefaultCompleteValue(
nsAString &_retval) {
MOZ_ASSERT(mInput, "Must have a valid input");
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
nsIAutoCompleteResult *result;
int32_t defaultIndex = -1;
nsresult rv = GetDefaultCompleteResult(-1, &result, &defaultIndex);
if (NS_FAILED(rv)) return rv;
result->GetValueAt(defaultIndex, _retval);
nsAutoString inputValue;
input->GetTextValue(inputValue);
if (!_retval.Equals(inputValue, nsCaseInsensitiveStringComparator())) {
return NS_ERROR_FAILURE;
}
nsAutoString finalCompleteValue;
rv = result->GetFinalCompleteValueAt(defaultIndex, finalCompleteValue);
if (NS_SUCCEEDED(rv)) {
_retval = finalCompleteValue;
}
return NS_OK;
}
nsresult nsAutoCompleteController::CompleteValue(nsString &aValue)
/* mInput contains mSearchString, which we want to autocomplete to aValue. If
* selectDifference is true, select the remaining portion of aValue not
* contained in mSearchString. */
{
MOZ_ASSERT(mInput, "Must have a valid input");
nsCOMPtr<nsIAutoCompleteInput> input(mInput);
const int32_t mSearchStringLength = mSearchString.Length();
int32_t endSelect = aValue.Length(); // By default, select all of aValue.
if (aValue.IsEmpty() ||
StringBeginsWith(aValue, mSearchString,
nsCaseInsensitiveStringComparator())) {
// aValue is empty (we were asked to clear mInput), or mSearchString
// matches the beginning of aValue. In either case we can simply
// autocomplete to aValue.
mPlaceholderCompletionString = aValue;
SetValueOfInputTo(aValue,
nsIAutoCompleteInput::TEXTVALUE_REASON_COMPLETEDEFAULT);
} else {
nsresult rv;
nsCOMPtr<nsIIOService> ios = do_GetService(NS_IOSERVICE_CONTRACTID, &rv);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString scheme;
if (NS_SUCCEEDED(
ios->ExtractScheme(NS_ConvertUTF16toUTF8(aValue), scheme))) {
// Trying to autocomplete a URI from somewhere other than the beginning.
// Only succeed if the missing portion is "http://"; otherwise do not
// autocomplete. This prevents us from "helpfully" autocompleting to a
// URI that isn't equivalent to what the user expected.
const int32_t findIndex = 7; // length of "http://"
if ((endSelect < findIndex + mSearchStringLength) ||
!scheme.EqualsLiteral("http") ||
!Substring(aValue, findIndex, mSearchStringLength)
.Equals(mSearchString, nsCaseInsensitiveStringComparator())) {
return NS_OK;
}
mPlaceholderCompletionString =
mSearchString +
Substring(aValue, mSearchStringLength + findIndex, endSelect);
SetValueOfInputTo(mPlaceholderCompletionString,
nsIAutoCompleteInput::TEXTVALUE_REASON_COMPLETEDEFAULT);
endSelect -= findIndex; // We're skipping this many characters of aValue.
} else {
// Autocompleting something other than a URI from the middle.
// Use the format "searchstring >> full string" to indicate to the user
// what we are going to replace their search string with.
SetValueOfInputTo(mSearchString + NS_LITERAL_STRING(" >> ") + aValue,
nsIAutoCompleteInput::TEXTVALUE_REASON_COMPLETEDEFAULT);
endSelect = mSearchString.Length() + 4 + aValue.Length();
// Reset the last search completion.
mPlaceholderCompletionString.Truncate();
}
}
input->SelectTextRange(mSearchStringLength, endSelect);
return NS_OK;
}
nsresult nsAutoCompleteController::GetResultLabelAt(int32_t aIndex,
nsAString &_retval) {
return GetResultValueLabelAt(aIndex, false, false, _retval);
}
nsresult nsAutoCompleteController::GetResultValueAt(int32_t aIndex,
bool aGetFinalValue,
nsAString &_retval) {
return GetResultValueLabelAt(aIndex, aGetFinalValue, true, _retval);
}
nsresult nsAutoCompleteController::GetResultValueLabelAt(int32_t aIndex,
bool aGetFinalValue,
bool aGetValue,
nsAString &_retval) {
NS_ENSURE_TRUE(aIndex >= 0 && static_cast<uint32_t>(aIndex) < mMatchCount,
NS_ERROR_ILLEGAL_VALUE);
int32_t matchIndex;
nsIAutoCompleteResult *result;
nsresult rv = GetResultAt(aIndex, &result, &matchIndex);
NS_ENSURE_SUCCESS(rv, rv);
uint16_t searchResult;
result->GetSearchResult(&searchResult);
if (searchResult == nsIAutoCompleteResult::RESULT_FAILURE) {
if (aGetValue) return NS_ERROR_FAILURE;
result->GetErrorDescription(_retval);
} else if (searchResult == nsIAutoCompleteResult::RESULT_SUCCESS ||
searchResult == nsIAutoCompleteResult::RESULT_SUCCESS_ONGOING) {
if (aGetFinalValue) {
// Some implementations may miss finalCompleteValue, try to be backwards
// compatible.
if (NS_FAILED(result->GetFinalCompleteValueAt(matchIndex, _retval))) {
result->GetValueAt(matchIndex, _retval);
}
} else if (aGetValue) {
result->GetValueAt(matchIndex, _retval);
} else {
result->GetLabelAt(matchIndex, _retval);
}
}
return NS_OK;
}
/**
* Given the index of a match in the autocomplete popup, find the
* corresponding nsIAutoCompleteSearch index, and sub-index into
* the search's results list.
*/
nsresult nsAutoCompleteController::MatchIndexToSearch(int32_t aMatchIndex,
int32_t *aSearchIndex,
int32_t *aItemIndex) {
*aSearchIndex = -1;
*aItemIndex = -1;
uint32_t index = 0;
// Move index through the results of each registered nsIAutoCompleteSearch
// until we find the given match
for (uint32_t i = 0; i < mSearches.Length(); ++i) {
nsIAutoCompleteResult *result = mResults.SafeObjectAt(i);
if (!result) continue;
uint32_t matchCount = 0;
uint16_t searchResult;
result->GetSearchResult(&searchResult);
// Find out how many results were provided by the
// current nsIAutoCompleteSearch.
if (searchResult == nsIAutoCompleteResult::RESULT_SUCCESS ||
searchResult == nsIAutoCompleteResult::RESULT_SUCCESS_ONGOING) {
result->GetMatchCount(&matchCount);
}
// If the given match index is within the results range
// of the current nsIAutoCompleteSearch then return the
// search index and sub-index into the results array
if ((matchCount != 0) &&
(index + matchCount - 1 >= (uint32_t)aMatchIndex)) {
*aSearchIndex = i;
*aItemIndex = aMatchIndex - index;
return NS_OK;
}
// Advance the popup table index cursor past the
// results of the current search.
index += matchCount;
}
return NS_OK;
}
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