/*
 * Copyright (C) 2015 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 */

#include "config.h"

#import "PlatformUtilities.h"
#import <WebKit/WKWebViewPrivate.h>
#import <wtf/RetainPtr.h>

#if WK_API_ENABLED && PLATFORM(MAC)

static bool didFinishNavigation;
static bool didInvalidateIntrinsicContentSize;

@interface AutoLayoutNavigationDelegate : NSObject <WKNavigationDelegate>
@end

@implementation AutoLayoutNavigationDelegate

- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation
{
    didFinishNavigation = true;
}

@end

@interface AutoLayoutWKWebView : WKWebView
@end

@implementation AutoLayoutWKWebView {
    BOOL _expectingIntrinsicContentSizeChange;
    NSSize _expectedIntrinsicContentSize;
}

- (void)load:(NSString *)HTMLString withWidth:(CGFloat)width expectingContentSize:(NSSize)size
{
    EXPECT_FALSE(_expectingIntrinsicContentSizeChange);

    NSString *baseHTML = @"<style>"
    "body, html { margin: 0; padding: 0; }"
    "div { background-color: green; }"
    ".small { width: 10px; height: 10px; }"
    ".large { width: 100px; height: 100px; }"
    ".veryWide { width: 100px; height: 10px; }"
    ".inline { display: inline-block; }"
    "</style>";

    didFinishNavigation = false;
    [self loadHTMLString:[baseHTML stringByAppendingString:HTMLString] baseURL:nil];
    TestWebKitAPI::Util::run(&didFinishNavigation);

    [self layoutAtMinimumWidth:width andExpectContentSizeChange:size];
}

- (void)layoutAtMinimumWidth:(CGFloat)width andExpectContentSizeChange:(NSSize)size
{
    [self _setMinimumLayoutWidth:width];

    // NOTE: Each adjacent expected result must be different, or we'll early return and not call invalidateIntrinsicContentSize!
    EXPECT_FALSE(NSEqualSizes(size, self.intrinsicContentSize));

    _expectingIntrinsicContentSizeChange = YES;
    _expectedIntrinsicContentSize = size;
    didInvalidateIntrinsicContentSize = false;
    TestWebKitAPI::Util::run(&didInvalidateIntrinsicContentSize);

    [self _setMinimumLayoutWidth:0];
}

- (void)invalidateIntrinsicContentSize
{
    if (!_expectingIntrinsicContentSizeChange)
        return;

    _expectingIntrinsicContentSizeChange = NO;

    NSSize intrinsicContentSize = self.intrinsicContentSize;
    EXPECT_EQ(_expectedIntrinsicContentSize.width, intrinsicContentSize.width);
    EXPECT_EQ(_expectedIntrinsicContentSize.height, intrinsicContentSize.height);

    didInvalidateIntrinsicContentSize = true;
}

@end

TEST(WebKit2, AutoLayoutIntegration)
{
    RetainPtr<AutoLayoutWKWebView> webView = adoptNS([[AutoLayoutWKWebView alloc] initWithFrame:NSMakeRect(0, 0, 1000, 1000)]);

    AutoLayoutNavigationDelegate *delegate = [[AutoLayoutNavigationDelegate alloc] init];
    [webView setNavigationDelegate:delegate];

    // 10x10 rect with the constraint (width >= 50) -> 50x10
    [webView load:@"<div class='small'></div>" withWidth:50 expectingContentSize:NSMakeSize(50, 10)];

    // 100x100 rect with the constraint (width >= 50) -> 100x100
    [webView load:@"<div class='large'></div>" withWidth:50 expectingContentSize:NSMakeSize(100, 100)];

    // 100x10 rect with the constraint (width >= 50) -> 100x10
    [webView load:@"<div class='veryWide'></div>" withWidth:50 expectingContentSize:NSMakeSize(100, 10)];

    // Ten 10x10 rects, inline, should result in two rows of five; with the constraint (width >= 50) -> 50x20
    [webView load:@"<div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div>" withWidth:50 expectingContentSize:NSMakeSize(50, 20)];

    // Changing the width to 10 should result in ten rows of one; with the constraint (width >= 10) -> 10x100
    [webView layoutAtMinimumWidth:10 andExpectContentSizeChange:NSMakeSize(10, 100)];

    // Changing the width to 100 should result in one rows of ten; with the constraint (width >= 100) -> 100x10
    [webView layoutAtMinimumWidth:100 andExpectContentSizeChange:NSMakeSize(100, 10)];

    // One 100x100 rect and ten 10x10 rects, inline; with the constraint (width >= 20) -> 100x110
    [webView load:@"<div class='large'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div><div class='small inline'></div>" withWidth:20 expectingContentSize:NSMakeSize(100, 110)];
}

#endif