gecko-dev/camino/CHAutoCompleteTextField.mm

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Mozilla Public
* License Version 1.1 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* The Original Code is the Mozilla browser.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 2002 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
* Joe Hewitt <hewitt@netscape.com> (Original Author)
*/
#import "CHAutoCompleteTextField.h"
#import "BrowserWindowController.h"
#import "CHPageProxyIcon.h"
#include "nsIServiceManager.h"
#include "nsMemory.h"
#include "nsString.h"
static const int kMaxRows = 6;
static const int kFrameMargin = 1;
class AutoCompleteListener : public nsIAutoCompleteListener
{
public:
AutoCompleteListener(CHAutoCompleteTextField* aTextField)
{
NS_INIT_REFCNT();
mTextField = aTextField;
}
NS_DECL_ISUPPORTS
NS_IMETHODIMP OnStatus(const PRUnichar* aText) { return NS_OK; }
NS_IMETHODIMP SetParam(nsISupports *aParam) { return NS_OK; }
NS_IMETHODIMP GetParam(nsISupports **aParam) { return NS_OK; }
NS_IMETHODIMP OnAutoComplete(nsIAutoCompleteResults *aResults, AutoCompleteStatus aStatus)
{
[mTextField dataReady:aResults status:aStatus];
return NS_OK;
}
private:
CHAutoCompleteTextField *mTextField;
};
NS_IMPL_ISUPPORTS1(AutoCompleteListener, nsIAutoCompleteListener)
////////////////////////////////////////////////////////////////////////
@implementation CHAutoCompleteTextField
- (void) awakeFromNib
{
NSTableColumn *column;
NSScrollView *scrollView;
NSCell *dataCell;
mSearchString = nil;
mBackspaced = NO;
mCompleteResult = NO;
mOpenTimer = nil;
mSession = nsnull;
mResults = nsnull;
mListener = (nsIAutoCompleteListener *)new AutoCompleteListener(self);
NS_IF_ADDREF(mListener);
[self setDelegate: self];
// XXX the owner of the textfield should set this
[self setSession:@"history"];
// construct and configure the popup window
mPopupWin = [[[NSWindow alloc] initWithContentRect:NSMakeRect(0,0,0,0)
styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered defer:NO] retain];
[mPopupWin setReleasedWhenClosed:NO];
[mPopupWin setLevel:NSPopUpMenuWindowLevel];
[mPopupWin setHasShadow:YES];
[mPopupWin setAlphaValue:0.9];
// construct and configure the view
mTableView = [[[NSTableView alloc] initWithFrame:NSMakeRect(0,0,0,0)] autorelease];
[mTableView setIntercellSpacing:NSMakeSize(1, 2)];
[mTableView setTarget:self];
[mTableView setAction:@selector(onRowClicked:)];
// Create the icon column if we have a proxy icon
if (mProxyIcon) {
column = [[[NSTableColumn alloc] initWithIdentifier:@"icon"] autorelease];
[column setWidth:[mProxyIcon frame].origin.x + [mProxyIcon frame].size.width];
dataCell = [[[NSImageCell alloc] initImageCell:nil] autorelease];
[column setDataCell:dataCell];
[mTableView addTableColumn: column];
}
// create the text columns
column = [[[NSTableColumn alloc] initWithIdentifier:@"col1"] autorelease];
[mTableView addTableColumn: column];
column = [[[NSTableColumn alloc] initWithIdentifier:@"col2"] autorelease];
[[column dataCell] setTextColor:[NSColor darkGrayColor]];
[mTableView addTableColumn: column];
// hide the table header
[mTableView setHeaderView:nil];
// construct the scroll view that contains the table view
scrollView = [[[NSScrollView alloc] initWithFrame:NSMakeRect(0,0,0,0)] autorelease];
[scrollView setHasVerticalScroller:YES];
[[scrollView verticalScroller] setControlSize:NSSmallControlSize];
[scrollView setDocumentView: mTableView];
// construct the datasource
mDataSource = [[CHAutoCompleteDataSource alloc] init];
[mTableView setDataSource: mDataSource];
[mPopupWin setContentView:scrollView];
// listen for when window resigns from key handling
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onBlur:)
name:NSWindowDidResignKeyNotification object:nil];
// listen for when window is about to be moved or resized
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onBlur:)
name:NSWindowWillMoveNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onResize:)
name:NSWindowDidResizeNotification object:nil];
}
- (void) dealloc
{
[[NSNotificationCenter defaultCenter] removeObserver:self];
if (mSearchString)
[mSearchString release];
[mPopupWin release];
[mDataSource release];
NS_IF_RELEASE(mSession);
NS_IF_RELEASE(mResults);
NS_IF_RELEASE(mListener);
}
- (void) setSession:(NSString *)aSession
{
NS_IF_RELEASE(mSession);
// XXX add aSession to contract id
nsCOMPtr<nsIAutoCompleteSession> session =
do_GetService("@mozilla.org/autocompleteSession;1?type=history");
mSession = session;
NS_IF_ADDREF(mSession);
}
- (NSString *) session
{
// XXX return session name
return @"";
}
- (NSTableView *) tableView
{
return mTableView;
}
- (int) visibleRows
{
int minRows = [mDataSource rowCount];
return minRows < kMaxRows ? minRows : kMaxRows;
}
// searching ////////////////////////////
- (void) startSearch:(NSString*)aString complete:(BOOL)aComplete
{
if (mSearchString)
[mSearchString release];
mSearchString = [aString retain];
mCompleteResult = aComplete;
if ([self isOpen]) {
[self performSearch];
} else {
// delay the search when the popup is not yet opened so that users
// don't see a jerky flashing popup when they start typing for the first time
if (mOpenTimer) {
[mOpenTimer invalidate];
[mOpenTimer release];
}
mOpenTimer = [[NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:@selector(searchTimer:)
userInfo:nil repeats:NO] retain];
}
}
- (void) performSearch
{
PRUnichar* chars = nsMemory::Alloc(([mSearchString length]+1) * sizeof(PRUnichar));
[mSearchString getCharacters:chars];
chars[[mSearchString length]] = 0; // I shouldn't have to do this
nsresult rv = mSession->OnStartLookup(chars, mResults, mListener);
nsMemory::Free(chars);
if (NS_FAILED(rv))
NSLog(@"Unable to perform autocomplete lookup");
}
- (void) dataReady:(nsIAutoCompleteResults*)aResults status:(AutoCompleteStatus)aStatus
{
NS_IF_RELEASE(mResults);
mResults = nsnull;
if (aStatus == nsIAutoCompleteStatus::failed) {
[mDataSource setErrorMessage:@""];
} else if (aStatus == nsIAutoCompleteStatus::ignored) {
[mDataSource setErrorMessage:@""];
} else if (aStatus == nsIAutoCompleteStatus::noMatch) {
[mDataSource setErrorMessage:@""];
} else if (aStatus == nsIAutoCompleteStatus::matchFound) {
mResults = aResults;
NS_IF_ADDREF(mResults);
[mDataSource setResults:aResults];
[self completeDefaultResult];
}
if ([mDataSource rowCount] > 0) {
[mTableView noteNumberOfRowsChanged];
[self openPopup];
} else {
[self closePopup];
}
}
- (void) searchTimer:(NSTimer *)aTimer
{
[mOpenTimer release];
mOpenTimer = nil;
[self performSearch];
}
- (void) clearResults
{
// clear out search data
mSearchString = nil;
mResults = nil;
[mDataSource setResults:nil];
[self closePopup];
}
// handling the popup /////////////////////////////////
- (void) openPopup
{
[self resizePopup];
// show the popup
if ([mPopupWin isVisible] == NO)
[mPopupWin orderFront:nil];
}
- (void) resizePopup
{
NSRect locationFrame, winFrame;
NSPoint locationOrigin;
int tableHeight;
if ([self visibleRows] == 0) {
[self closePopup];
return;
}
// get the origin of the location bar in coordinates of the root view
locationFrame = [[self superview] frame];
locationOrigin = [[[self superview] superview] convertPoint:locationFrame.origin
toView:[[[self window] contentView] superview]];
// get the height of the table view
winFrame = [[self window] frame];
tableHeight = (int)([mTableView rowHeight]+[mTableView intercellSpacing].height)*[self visibleRows];
// make the columns split the width of the popup
[[mTableView tableColumnWithIdentifier:@"col1"] setWidth:locationFrame.size.width/2];
// position the popup anchored to bottom/left of location bar (
[mPopupWin setFrame:NSMakeRect(winFrame.origin.x + locationOrigin.x + kFrameMargin,
((winFrame.origin.y + locationOrigin.y) - tableHeight) - kFrameMargin,
locationFrame.size.width - (2*kFrameMargin),
tableHeight) display:NO];
}
- (void) closePopup
{
[mPopupWin close];
}
- (BOOL) isOpen
{
return [mPopupWin isVisible];
}
// url completion ////////////////////////////
- (void) completeDefaultResult
{
PRInt32 defaultRow;
mResults->GetDefaultItemIndex(&defaultRow);
if (mCompleteResult) {
[self selectRowAt:defaultRow];
[self completeResult:defaultRow];
} else {
[self selectRowAt:-1];
}
}
- (void) completeSelectedResult
{
[self completeResult:[mTableView selectedRow]];
}
- (void) completeResult:(int)aRow
{
NSRange matchRange;
NSText *text;
NSString *result1;
if (aRow < 0 && mSearchString) {
[self setStringValue:mSearchString];
} else {
if ([mDataSource rowCount] <= 0)
return;
result1 = [mDataSource resultString:aRow column:@"col1"];
matchRange = [result1 rangeOfString:mSearchString];
if (matchRange.length > 0) {
// cut off everything in the result string before the search string
result1 = [result1 substringWithRange:NSMakeRange(matchRange.location, [result1 length]-matchRange.location)];
// fill in the textfield with the matching string
[self setStringValue:result1];
// select the text after the search string
text = [[self window] fieldEditor:NO forObject:self];
[text setSelectedRange:NSMakeRange([mSearchString length], [result1 length]-[mSearchString length])];
}
}
}
- (void) enterResult:(int)aRow
{
if (aRow >= 0 && [mDataSource rowCount] > 0) {
[self setStringValue: [mDataSource resultString:[mTableView selectedRow] column:@"col1"]];
[self selectText:self];
[self closePopup];
} else if (mOpenTimer) {
// if there was a search timer going when we hit enter, cancel it
[mOpenTimer invalidate];
[mOpenTimer release];
mOpenTimer = nil;
}
}
- (void) revertText
{
BrowserWindowController *controller = (BrowserWindowController *)[[self window] windowController];
NSString *url = [[controller getBrowserWrapper] getCurrentURLSpec];
if (url) {
[self clearResults];
[self setStringValue:url];
[self selectText:self];
}
}
// selecting rows /////////////////////////////////////////
- (void) selectRowAt:(int)aRow
{
if (aRow >= -1 && [mDataSource rowCount] > 0) {
// show the popup
if ([mPopupWin isVisible] == NO)
[mPopupWin orderFront:nil];
[mTableView selectRow:aRow byExtendingSelection:NO];
[mTableView scrollRowToVisible: aRow];
}
}
- (void) selectRowBy:(int)aRows
{
int row = [mTableView selectedRow];
if (row == -1 && aRows < 0) {
// if nothing is selected and you scroll up, go to last row
row = [mTableView numberOfRows]-1;
} else if (row == [mTableView numberOfRows]-1 && aRows == 1) {
// if the last row is selected and you scroll down, go to first row
row = 0;
} else if (aRows+row < 0) {
// if you scroll up beyond first row...
if (row == 0)
row = -1; // ...and first row is selected, select nothing
else
row = 0; // ...else, go to first row
} else if (aRows+row >= [mTableView numberOfRows]) {
// if you scroll down beyond the last row...
if (row == [mTableView numberOfRows]-1)
row = 0; // and last row is selected, select first row
else
row = [mTableView numberOfRows]-1; // else, go to last row
} else {
// no special case, just increment current row
row += aRows;
}
[self selectRowAt:row];
}
// event handlers ////////////////////////////////////////////
- (void) onRowClicked:(id)sender
{
[self enterResult:[mTableView clickedRow]];
[self sendAction:[self action] to:[self target]];
}
- (void) onBlur:(id)sender
{
[self closePopup];
}
- (void) onResize:(id)sender
{
[self resizePopup];
}
// NSTextField delegate //////////////////////////////////
- (void)controlTextDidChange:(NSNotification *)aNotification
{
NSText *text = [[self window] fieldEditor:NO forObject:self];
NSRange range = [text selectedRange];
// make sure we're typing at the end of the string
if (range.location == [[self stringValue] length])
[self startSearch:[self stringValue] complete:!mBackspaced];
else
[self clearResults];
mBackspaced = NO;
}
- (void)controlTextDidEndEditing:(NSNotification *)aNotification
{
[self closePopup];
}
- (BOOL)control:(NSControl *)control textView:(NSTextView *)textView doCommandBySelector:(SEL)command
{
if (command == @selector(insertNewline:)) {
[self enterResult:[mTableView selectedRow]];
} else if (command == @selector(moveUp:)) {
[self selectRowBy:-1];
[self completeSelectedResult];
return YES;
} else if (command == @selector(moveDown:)) {
[self selectRowBy:1];
[self completeSelectedResult];
return YES;
} else if (command == @selector(scrollPageUp:)) {
[self selectRowBy:-kMaxRows];
[self completeSelectedResult];
} else if (command == @selector(scrollPageDown:)) {
[self selectRowBy:kMaxRows];
[self completeSelectedResult];
} else if (command == @selector(moveToBeginningOfDocument:)) {
[self selectRowAt:0];
[self completeSelectedResult];
} else if (command == @selector(moveToEndOfDocument:)) {
[self selectRowAt:[mTableView numberOfRows]-1];
[self completeSelectedResult];
} else if (command == @selector(insertTab:) || command == @selector(insertNewline:)) {
[self closePopup];
} else if (command == @selector(deleteBackward:) ||
command == @selector(deleteForward:)) {
// if the user deletes characters, we need to know so that
// we can prevent autocompletion later when search results come in
if ([[self stringValue] length] > 1)
mBackspaced = YES;
}
return NO;
}
@end