#ifndef WEBVIEW_H
#define WEBVIEW_H

#ifdef __cplusplus
extern "C" {
#endif

#include <stdlib.h>
#include <string.h>

#if defined(WEBVIEW_GTK)
#include <JavaScriptCore/JavaScript.h>
#include <gtk/gtk.h>
#include <webkit2/webkit2.h>

struct webview_priv {
    int ready;
    GtkWidget *window;
    GtkWidget *scroller;
    GtkWidget *webview;
    GtkWidget *inspector_window;
    int should_exit;
};
#elif defined(WEBVIEW_WINAPI)
#define CINTERFACE
#include <windows.h>

#include <commctrl.h>
#include <exdisp.h>
#include <mshtmhst.h>
#include <mshtml.h>
#include <shobjidl.h>

#include <stdio.h>

struct webview_priv {
    HWND hwnd;
    IOleObject **browser;
    BOOL is_fullscreen;
    DWORD saved_style;
    DWORD saved_ex_style;
    RECT saved_rect;
};
#elif defined(WEBVIEW_COCOA)
#import <Cocoa/Cocoa.h>
#import <WebKit/WebKit.h>
#import <objc/runtime.h>

struct webview_priv {
    NSAutoreleasePool *pool;
    NSWindow *window;
    WebView *webview;
    id windowDelegate;
    int should_exit;
};
#else
#error "Define one of: WEBVIEW_GTK, WEBVIEW_COCOA or WEBVIEW_WINAPI"
#endif

struct webview;

typedef void (*webview_external_invoke_cb_t)(struct webview *w,
        const char *arg);

struct webview {
    const char *url;
    const char *title;
    int width;
    int height;
    int resizable;
    int debug;
    webview_external_invoke_cb_t external_invoke_cb;
    struct webview_priv priv;
    void *userdata;
};

enum webview_dialog_type {
    WEBVIEW_DIALOG_TYPE_OPEN = 0,
    WEBVIEW_DIALOG_TYPE_SAVE = 1,
    WEBVIEW_DIALOG_TYPE_ALERT = 2
};

#define WEBVIEW_DIALOG_FLAG_FILE (0 << 0)
#define WEBVIEW_DIALOG_FLAG_DIRECTORY (1 << 0)

#define WEBVIEW_DIALOG_FLAG_INFO (1 << 1)
#define WEBVIEW_DIALOG_FLAG_WARNING (2 << 1)
#define WEBVIEW_DIALOG_FLAG_ERROR (3 << 1)
#define WEBVIEW_DIALOG_FLAG_ALERT_MASK (3 << 1)

typedef void (*webview_dispatch_fn)(struct webview *w, void *arg);

struct webview_dispatch_arg {
    webview_dispatch_fn fn;
    struct webview *w;
    void *arg;
};

#define DEFAULT_URL                                                            \
  "data:text/"                                                                 \
  "html,%3C%21DOCTYPE%20html%3E%0A%3Chtml%20lang=%22en%22%3E%0A%3Chead%3E%"    \
  "3Cmeta%20charset=%22utf-8%22%3E%3Cmeta%20http-equiv=%22X-UA-Compatible%22%" \
  "20content=%22IE=edge%22%3E%3C%2Fhead%3E%0A%3Cbody%3E%3Cdiv%20id=%22app%22%" \
  "3E%3C%2Fdiv%3E%3Cscript%20type=%22text%2Fjavascript%22%3E%3C%2Fscript%3E%"  \
  "3C%2Fbody%3E%0A%3C%2Fhtml%3E"

#define CSS_INJECT_FUNCTION                                                    \
  "(function(e){var "                                                          \
  "t=document.createElement('style'),d=document.head||document."               \
  "getElementsByTagName('head')[0];t.setAttribute('type','text/"               \
  "css'),t.styleSheet?t.styleSheet.cssText=e:t.appendChild(document."          \
  "createTextNode(e)),d.appendChild(t)})"

static const char *webview_check_url(const char *url)
{
    if (url == NULL || strlen(url) == 0) {
        return DEFAULT_URL;
    }
    return url;
}

static int webview_init(struct webview *w);
static int webview_loop(struct webview *w, int blocking);
static int webview_eval(struct webview *w, const char *js);
static int webview_inject_css(struct webview *w, const char *css);
static void webview_set_title(struct webview *w, const char *title);
static void webview_set_fullscreen(struct webview *w, int fullscreen);
static void webview_dialog(struct webview *w, enum webview_dialog_type dlgtype,
                           int flags, const char *title, const char *arg,
                           char *result, size_t resultsz);
static void webview_dispatch(struct webview *w, webview_dispatch_fn fn,
                             void *arg);
static void webview_terminate(struct webview *w);
static void webview_exit(struct webview *w);
static void webview_debug(const char *format, ...);
static void webview_print_log(const char *s);

static int webview(const char *title, const char *url, int w, int h,
                   int resizable)
{
    struct webview webview = {0};
    webview.title = title;
    webview.url = url;
    webview.width = w;
    webview.height = h;
    webview.resizable = resizable;
    int r = webview_init(&webview);
    if (r != 0) {
        return r;
    }
    while (webview_loop(&webview, 1) == 0)
        ;
    webview_exit(&webview);
    return 0;
}

static void webview_debug(const char *format, ...)
{
    char buf[4096];
    va_list ap;
    va_start(ap, format);
    vsnprintf(buf, sizeof(buf), format, ap);
    webview_print_log(buf);
    va_end(ap);
}

static int webview_js_encode(const char *s, char *esc, size_t n)
{
    int r = 1; /* At least one byte for trailing zero */
    for (; *s; s++) {
        const unsigned char c = *s;
        if (c >= 0x20 && c < 0x80 && strchr("<>\\'\"", c) == NULL) {
            if (n > 0) {
                *esc++ = c;
                n--;
            }
            r++;
        } else {
            if (n > 0) {
                snprintf(esc, n, "\\x%02x", (int)c);
                esc += 4;
                n -= 4;
            }
            r += 4;
        }
    }
    return r;
}

static int webview_inject_css(struct webview *w, const char *css)
{
    int n = webview_js_encode(css, NULL, 0);
    char *esc = (char *)calloc(1, sizeof(CSS_INJECT_FUNCTION) + n + 4);
    if (esc == NULL) {
        return -1;
    }
    strcpy(esc, CSS_INJECT_FUNCTION);
    strcat(esc, "(\"");
    webview_js_encode(css, esc + strlen(esc), n);
    strcat(esc, "\")");
    int r = webview_eval(w, esc);
    free(esc);
    return r;
}

#if defined(WEBVIEW_GTK)
static void external_message_received_cb(WebKitUserContentManager *m,
        WebKitJavascriptResult *r,
        gpointer arg)
{
    (void)m;
    struct webview *w = (struct webview *)arg;
    if (w->external_invoke_cb == NULL) {
        return;
    }
    JSGlobalContextRef context = webkit_javascript_result_get_global_context(r);
    JSValueRef value = webkit_javascript_result_get_value(r);
    JSStringRef js = JSValueToStringCopy(context, value, NULL);
    size_t n = JSStringGetMaximumUTF8CStringSize(js);
    char *s = g_new(char, n);
    JSStringGetUTF8CString(js, s, n);
    w->external_invoke_cb(w, s);
    JSStringRelease(js);
    g_free(s);
}

static void webview_load_changed_cb(WebKitWebView *webview,
                                    WebKitLoadEvent event, gpointer arg)
{
    (void)webview;
    struct webview *w = (struct webview *)arg;
    if (event == WEBKIT_LOAD_FINISHED) {
        w->priv.ready = 1;
    }
}

static void webview_desroy_cb(GtkWidget *widget, gpointer arg)
{
    (void)widget;
    struct webview *w = (struct webview *)arg;
    webview_terminate(w);
}

static gboolean webview_context_menu_cb(WebKitWebView *webview,
                                        GtkWidget *default_menu,
                                        WebKitHitTestResult *hit_test_result,
                                        gboolean triggered_with_keyboard,
                                        gpointer userdata)
{
    (void)webview;
    (void)default_menu;
    (void)hit_test_result;
    (void)triggered_with_keyboard;
    (void)userdata;
    return TRUE;
}

static int webview_init(struct webview *w)
{
    if (gtk_init_check(0, NULL) == FALSE) {
        return -1;
    }

    w->priv.ready = 0;
    w->priv.should_exit = 0;
    w->priv.window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
    gtk_window_set_title(GTK_WINDOW(w->priv.window), w->title);

    if (w->resizable) {
        gtk_window_set_default_size(GTK_WINDOW(w->priv.window), w->width,
                                    w->height);
    } else {
        gtk_widget_set_size_request(w->priv.window, w->width, w->height);
    }
    gtk_window_set_resizable(GTK_WINDOW(w->priv.window), !!w->resizable);
    gtk_window_set_position(GTK_WINDOW(w->priv.window), GTK_WIN_POS_CENTER);

    w->priv.scroller = gtk_scrolled_window_new(NULL, NULL);
    gtk_container_add(GTK_CONTAINER(w->priv.window), w->priv.scroller);

    WebKitUserContentManager *m = webkit_user_content_manager_new();
    webkit_user_content_manager_register_script_message_handler(m, "external");
    g_signal_connect(m, "script-message-received::external",
                     G_CALLBACK(external_message_received_cb), w);

    w->priv.webview = webkit_web_view_new_with_user_content_manager(m);
    webkit_web_view_load_uri(WEBKIT_WEB_VIEW(w->priv.webview),
                             webview_check_url(w->url));
    g_signal_connect(G_OBJECT(w->priv.webview), "load-changed",
                     G_CALLBACK(webview_load_changed_cb), w);
    gtk_container_add(GTK_CONTAINER(w->priv.scroller), w->priv.webview);

    if (w->debug) {
        WebKitSettings *settings =
            webkit_web_view_get_settings(WEBKIT_WEB_VIEW(w->priv.webview));
        webkit_settings_set_enable_write_console_messages_to_stdout(settings, true);
        webkit_settings_set_enable_developer_extras(settings, true);
    } else {
        g_signal_connect(G_OBJECT(w->priv.webview), "context-menu",
                         G_CALLBACK(webview_context_menu_cb), w);
    }

    gtk_widget_show_all(w->priv.window);

    webkit_web_view_run_javascript(
        WEBKIT_WEB_VIEW(w->priv.webview),
        "window.external={invoke:function(x){"
        "window.webkit.messageHandlers.external.postMessage(x);}}",
        NULL, NULL, NULL);

    g_signal_connect(G_OBJECT(w->priv.window), "destroy",
                     G_CALLBACK(webview_desroy_cb), w);
    return 0;
}

static int webview_loop(struct webview *w, int blocking)
{
    gtk_main_iteration_do(blocking);
    return w->priv.should_exit;
}

static void webview_set_title(struct webview *w, const char *title)
{
    gtk_window_set_title(GTK_WINDOW(w->priv.window), title);
}

static void webview_set_fullscreen(struct webview *w, int fullscreen)
{
    if (fullscreen) {
        gtk_window_fullscreen(GTK_WINDOW(w->priv.window));
    } else {
        gtk_window_unfullscreen(GTK_WINDOW(w->priv.window));
    }
}

static void webview_dialog(struct webview *w, enum webview_dialog_type dlgtype,
                           int flags, const char *title, const char *arg,
                           char *result, size_t resultsz)
{
    GtkWidget *dlg;
    if (result != NULL) {
        result[0] = '\0';
    }
    if (dlgtype == WEBVIEW_DIALOG_TYPE_OPEN ||
        dlgtype == WEBVIEW_DIALOG_TYPE_SAVE) {
        dlg = gtk_file_chooser_dialog_new(
                  title, GTK_WINDOW(w->priv.window),
                  (dlgtype == WEBVIEW_DIALOG_TYPE_OPEN
                   ? (flags & WEBVIEW_DIALOG_FLAG_DIRECTORY
                      ? GTK_FILE_CHOOSER_ACTION_SELECT_FOLDER
                      : GTK_FILE_CHOOSER_ACTION_OPEN)
                   : GTK_FILE_CHOOSER_ACTION_SAVE),
                  "_Cancel", GTK_RESPONSE_CANCEL,
                  (dlgtype == WEBVIEW_DIALOG_TYPE_OPEN ? "_Open" : "_Save"),
                  GTK_RESPONSE_ACCEPT, NULL);
        gtk_file_chooser_set_local_only(GTK_FILE_CHOOSER(dlg), FALSE);
        gtk_file_chooser_set_select_multiple(GTK_FILE_CHOOSER(dlg), FALSE);
        gtk_file_chooser_set_show_hidden(GTK_FILE_CHOOSER(dlg), TRUE);
        gtk_file_chooser_set_do_overwrite_confirmation(GTK_FILE_CHOOSER(dlg), TRUE);
        gtk_file_chooser_set_create_folders(GTK_FILE_CHOOSER(dlg), TRUE);
        gint response = gtk_dialog_run(GTK_DIALOG(dlg));
        if (response == GTK_RESPONSE_ACCEPT) {
            gchar *filename = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dlg));
            g_strlcpy(result, filename, resultsz);
            g_free(filename);
        }
        gtk_widget_destroy(dlg);
    } else if (dlgtype == WEBVIEW_DIALOG_TYPE_ALERT) {
        GtkMessageType type = GTK_MESSAGE_OTHER;
        switch (flags & WEBVIEW_DIALOG_FLAG_ALERT_MASK) {
        case WEBVIEW_DIALOG_FLAG_INFO:
            type = GTK_MESSAGE_INFO;
            break;
        case WEBVIEW_DIALOG_FLAG_WARNING:
            type = GTK_MESSAGE_WARNING;
            break;
        case WEBVIEW_DIALOG_FLAG_ERROR:
            type = GTK_MESSAGE_ERROR;
            break;
        }
        dlg = gtk_message_dialog_new(GTK_WINDOW(w->priv.window), GTK_DIALOG_MODAL,
                                     type, GTK_BUTTONS_OK, "%s", title);
        gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dlg), "%s",
                arg);
        gtk_dialog_run(GTK_DIALOG(dlg));
        gtk_widget_destroy(dlg);
    }
}

static int webview_eval(struct webview *w, const char *js)
{
    while (w->priv.ready == 0) {
        g_main_context_iteration(0, FALSE);
    }
    webkit_web_view_run_javascript(WEBKIT_WEB_VIEW(w->priv.webview), js, NULL,
                                   NULL, NULL);
    return 0;
}

static gboolean webview_dispatch_wrapper(gpointer userdata)
{
    struct webview_dispatch_arg *arg = (struct webview_dispatch_arg *)userdata;
    (arg->fn)(arg->w, arg->arg);
    g_free(arg);
    return FALSE;
}

static void webview_dispatch(struct webview *w, webview_dispatch_fn fn,
                             void *arg)
{
    struct webview_dispatch_arg *context =
        (struct webview_dispatch_arg *)g_new(struct webview_dispatch_arg *, 1);
    context->w = w;
    context->arg = arg;
    context->fn = fn;
    gdk_threads_add_idle(webview_dispatch_wrapper, context);
}

static void webview_terminate(struct webview *w) { w->priv.should_exit = 1; }

static void webview_exit(struct webview *w) { (void)w; }
static void webview_print_log(const char *s) { fprintf(stderr, "%s\n", s); }

#endif /* WEBVIEW_GTK */

#if defined(WEBVIEW_WINAPI)

#pragma comment(lib, "user32.lib")
#pragma comment(lib, "ole32.lib")
#pragma comment(lib, "oleaut32.lib")

#define WM_WEBVIEW_DISPATCH (WM_APP + 1)

typedef struct {
    IOleInPlaceFrame frame;
    HWND window;
} _IOleInPlaceFrameEx;

typedef struct {
    IOleInPlaceSite inplace;
    _IOleInPlaceFrameEx frame;
} _IOleInPlaceSiteEx;

typedef struct { IDocHostUIHandler ui; } _IDocHostUIHandlerEx;

typedef struct {
    IOleClientSite client;
    _IOleInPlaceSiteEx inplace;
    _IDocHostUIHandlerEx ui;
    IDispatch external;
} _IOleClientSiteEx;

#ifdef __cplusplus
#define iid_ref(x) &(x)
#define iid_unref(x) *(x)
#else
#define iid_ref(x) (x)
#define iid_unref(x) (x)
#endif

static inline WCHAR *webview_to_utf16(const char *s)
{
    DWORD size = MultiByteToWideChar(CP_UTF8, 0, s, -1, 0, 0);
    WCHAR *ws = (WCHAR *)GlobalAlloc(GMEM_FIXED, sizeof(WCHAR) * size);
    if (ws == NULL) {
        return NULL;
    }
    MultiByteToWideChar(CP_UTF8, 0, s, -1, ws, size);
    return ws;
}

static inline char *webview_from_utf16(WCHAR *ws)
{
    int n = WideCharToMultiByte(CP_UTF8, 0, ws, -1, NULL, 0, NULL, NULL);
    char *s = (char *)GlobalAlloc(GMEM_FIXED, n);
    if (s == NULL) {
        return NULL;
    }
    WideCharToMultiByte(CP_UTF8, 0, ws, -1, s, n, NULL, NULL);
    return s;
}

static int iid_eq(REFIID a, const IID *b)
{
    return memcmp((const void *)iid_ref(a), (const void *)b, sizeof(GUID)) == 0;
}

static HRESULT STDMETHODCALLTYPE JS_QueryInterface(IDispatch FAR *This,
        REFIID riid,
        LPVOID FAR *ppvObj)
{
    if (iid_eq(riid, &IID_IDispatch)) {
        *ppvObj = This;
        return S_OK;
    }
    *ppvObj = 0;
    return E_NOINTERFACE;
}
static ULONG STDMETHODCALLTYPE JS_AddRef(IDispatch FAR *This) { return 1; }
static ULONG STDMETHODCALLTYPE JS_Release(IDispatch FAR *This) { return 1; }
static HRESULT STDMETHODCALLTYPE JS_GetTypeInfoCount(IDispatch FAR *This,
        UINT *pctinfo)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE JS_GetTypeInfo(IDispatch FAR *This,
        UINT iTInfo, LCID lcid,
        ITypeInfo **ppTInfo)
{
    return S_OK;
}
#define WEBVIEW_JS_INVOKE_ID 0x1000
static HRESULT STDMETHODCALLTYPE JS_GetIDsOfNames(IDispatch FAR *This,
        REFIID riid,
        LPOLESTR *rgszNames,
        UINT cNames, LCID lcid,
        DISPID *rgDispId)
{
    if (cNames != 1) {
        return S_FALSE;
    }
    if (wcscmp(rgszNames[0], L"invoke") == 0) {
        rgDispId[0] = WEBVIEW_JS_INVOKE_ID;
        return S_OK;
    }
    return S_FALSE;
}

static HRESULT STDMETHODCALLTYPE
JS_Invoke(IDispatch FAR *This, DISPID dispIdMember, REFIID riid, LCID lcid,
          WORD wFlags, DISPPARAMS *pDispParams, VARIANT *pVarResult,
          EXCEPINFO *pExcepInfo, UINT *puArgErr)
{
    size_t offset = (size_t) & ((_IOleClientSiteEx *)NULL)->external;
    _IOleClientSiteEx *ex = (_IOleClientSiteEx *)((char *)(This) - offset);
    struct webview *w = (struct webview *)GetWindowLongPtr(
                            ex->inplace.frame.window, GWLP_USERDATA);
    if (pDispParams->cArgs == 1 && pDispParams->rgvarg[0].vt == VT_BSTR) {
        BSTR bstr = pDispParams->rgvarg[0].bstrVal;
        char *s = webview_from_utf16(bstr);
        if (s != NULL) {
            if (dispIdMember == WEBVIEW_JS_INVOKE_ID) {
                if (w->external_invoke_cb != NULL) {
                    w->external_invoke_cb(w, s);
                }
            } else {
                return S_FALSE;
            }
            GlobalFree(s);
        }
    }
    return S_OK;
}

static IDispatchVtbl ExternalDispatchTable = {
    JS_QueryInterface, JS_AddRef,        JS_Release, JS_GetTypeInfoCount,
    JS_GetTypeInfo,    JS_GetIDsOfNames, JS_Invoke
};

static ULONG STDMETHODCALLTYPE Site_AddRef(IOleClientSite FAR *This)
{
    return 1;
}
static ULONG STDMETHODCALLTYPE Site_Release(IOleClientSite FAR *This)
{
    return 1;
}
static HRESULT STDMETHODCALLTYPE Site_SaveObject(IOleClientSite FAR *This)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE Site_GetMoniker(IOleClientSite FAR *This,
        DWORD dwAssign,
        DWORD dwWhichMoniker,
        IMoniker **ppmk)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE
Site_GetContainer(IOleClientSite FAR *This, LPOLECONTAINER FAR *ppContainer)
{
    *ppContainer = 0;
    return E_NOINTERFACE;
}
static HRESULT STDMETHODCALLTYPE Site_ShowObject(IOleClientSite FAR *This)
{
    return NOERROR;
}
static HRESULT STDMETHODCALLTYPE Site_OnShowWindow(IOleClientSite FAR *This,
        BOOL fShow)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE
Site_RequestNewObjectLayout(IOleClientSite FAR *This)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE Site_QueryInterface(IOleClientSite FAR *This,
        REFIID riid,
        void **ppvObject)
{
    if (iid_eq(riid, &IID_IUnknown) || iid_eq(riid, &IID_IOleClientSite))
        *ppvObject = &((_IOleClientSiteEx *)This)->client;
    else if (iid_eq(riid, &IID_IOleInPlaceSite))
        *ppvObject = &((_IOleClientSiteEx *)This)->inplace;
    else if (iid_eq(riid, &IID_IDocHostUIHandler))
        *ppvObject = &((_IOleClientSiteEx *)This)->ui;
    else {
        *ppvObject = 0;
        return (E_NOINTERFACE);
    }
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE InPlace_QueryInterface(
    IOleInPlaceSite FAR *This, REFIID riid, LPVOID FAR *ppvObj)
{
    return (Site_QueryInterface(
                (IOleClientSite *)((char *)This - sizeof(IOleClientSite)), riid, ppvObj));
}
static ULONG STDMETHODCALLTYPE InPlace_AddRef(IOleInPlaceSite FAR *This)
{
    return 1;
}
static ULONG STDMETHODCALLTYPE InPlace_Release(IOleInPlaceSite FAR *This)
{
    return 1;
}
static HRESULT STDMETHODCALLTYPE InPlace_GetWindow(IOleInPlaceSite FAR *This,
        HWND FAR *lphwnd)
{
    *lphwnd = ((_IOleInPlaceSiteEx FAR *)This)->frame.window;
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
InPlace_ContextSensitiveHelp(IOleInPlaceSite FAR *This, BOOL fEnterMode)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE
InPlace_CanInPlaceActivate(IOleInPlaceSite FAR *This)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
InPlace_OnInPlaceActivate(IOleInPlaceSite FAR *This)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
InPlace_OnUIActivate(IOleInPlaceSite FAR *This)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE InPlace_GetWindowContext(
    IOleInPlaceSite FAR *This, LPOLEINPLACEFRAME FAR *lplpFrame,
    LPOLEINPLACEUIWINDOW FAR *lplpDoc, LPRECT lprcPosRect, LPRECT lprcClipRect,
    LPOLEINPLACEFRAMEINFO lpFrameInfo)
{
    *lplpFrame = (LPOLEINPLACEFRAME) & ((_IOleInPlaceSiteEx *)This)->frame;
    *lplpDoc = 0;
    lpFrameInfo->fMDIApp = FALSE;
    lpFrameInfo->hwndFrame = ((_IOleInPlaceFrameEx *)*lplpFrame)->window;
    lpFrameInfo->haccel = 0;
    lpFrameInfo->cAccelEntries = 0;
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE InPlace_Scroll(IOleInPlaceSite FAR *This,
        SIZE scrollExtent)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE
InPlace_OnUIDeactivate(IOleInPlaceSite FAR *This, BOOL fUndoable)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
InPlace_OnInPlaceDeactivate(IOleInPlaceSite FAR *This)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
InPlace_DiscardUndoState(IOleInPlaceSite FAR *This)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE
InPlace_DeactivateAndUndo(IOleInPlaceSite FAR *This)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE
InPlace_OnPosRectChange(IOleInPlaceSite FAR *This, LPCRECT lprcPosRect)
{
    IOleObject *browserObject;
    IOleInPlaceObject *inplace;
    browserObject = *((IOleObject **)((char *)This - sizeof(IOleObject *) -
                                      sizeof(IOleClientSite)));
    if (!browserObject->lpVtbl->QueryInterface(browserObject,
            iid_unref(&IID_IOleInPlaceObject),
            (void **)&inplace)) {
        inplace->lpVtbl->SetObjectRects(inplace, lprcPosRect, lprcPosRect);
        inplace->lpVtbl->Release(inplace);
    }
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE Frame_QueryInterface(
    IOleInPlaceFrame FAR *This, REFIID riid, LPVOID FAR *ppvObj)
{
    return E_NOTIMPL;
}
static ULONG STDMETHODCALLTYPE Frame_AddRef(IOleInPlaceFrame FAR *This)
{
    return 1;
}
static ULONG STDMETHODCALLTYPE Frame_Release(IOleInPlaceFrame FAR *This)
{
    return 1;
}
static HRESULT STDMETHODCALLTYPE Frame_GetWindow(IOleInPlaceFrame FAR *This,
        HWND FAR *lphwnd)
{
    *lphwnd = ((_IOleInPlaceFrameEx *)This)->window;
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
Frame_ContextSensitiveHelp(IOleInPlaceFrame FAR *This, BOOL fEnterMode)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE Frame_GetBorder(IOleInPlaceFrame FAR *This,
        LPRECT lprectBorder)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE Frame_RequestBorderSpace(
    IOleInPlaceFrame FAR *This, LPCBORDERWIDTHS pborderwidths)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE Frame_SetBorderSpace(
    IOleInPlaceFrame FAR *This, LPCBORDERWIDTHS pborderwidths)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE Frame_SetActiveObject(
    IOleInPlaceFrame FAR *This, IOleInPlaceActiveObject *pActiveObject,
    LPCOLESTR pszObjName)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
Frame_InsertMenus(IOleInPlaceFrame FAR *This, HMENU hmenuShared,
                  LPOLEMENUGROUPWIDTHS lpMenuWidths)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE Frame_SetMenu(IOleInPlaceFrame FAR *This,
        HMENU hmenuShared,
        HOLEMENU holemenu,
        HWND hwndActiveObject)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE Frame_RemoveMenus(IOleInPlaceFrame FAR *This,
        HMENU hmenuShared)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE Frame_SetStatusText(IOleInPlaceFrame FAR *This,
        LPCOLESTR pszStatusText)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
Frame_EnableModeless(IOleInPlaceFrame FAR *This, BOOL fEnable)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
Frame_TranslateAccelerator(IOleInPlaceFrame FAR *This, LPMSG lpmsg, WORD wID)
{
    return E_NOTIMPL;
}
static HRESULT STDMETHODCALLTYPE UI_QueryInterface(IDocHostUIHandler FAR *This,
        REFIID riid,
        LPVOID FAR *ppvObj)
{
    return (Site_QueryInterface((IOleClientSite *)((char *)This -
                                sizeof(IOleClientSite) -
                                sizeof(_IOleInPlaceSiteEx)),
                                riid, ppvObj));
}
static ULONG STDMETHODCALLTYPE UI_AddRef(IDocHostUIHandler FAR *This)
{
    return 1;
}
static ULONG STDMETHODCALLTYPE UI_Release(IDocHostUIHandler FAR *This)
{
    return 1;
}
static HRESULT STDMETHODCALLTYPE UI_ShowContextMenu(
    IDocHostUIHandler FAR *This, DWORD dwID, POINT __RPC_FAR *ppt,
    IUnknown __RPC_FAR *pcmdtReserved, IDispatch __RPC_FAR *pdispReserved)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
UI_GetHostInfo(IDocHostUIHandler FAR *This, DOCHOSTUIINFO __RPC_FAR *pInfo)
{
    pInfo->cbSize = sizeof(DOCHOSTUIINFO);
    pInfo->dwFlags = DOCHOSTUIFLAG_NO3DBORDER;
    pInfo->dwDoubleClick = DOCHOSTUIDBLCLK_DEFAULT;
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE UI_ShowUI(
    IDocHostUIHandler FAR *This, DWORD dwID,
    IOleInPlaceActiveObject __RPC_FAR *pActiveObject,
    IOleCommandTarget __RPC_FAR *pCommandTarget,
    IOleInPlaceFrame __RPC_FAR *pFrame, IOleInPlaceUIWindow __RPC_FAR *pDoc)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE UI_HideUI(IDocHostUIHandler FAR *This)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE UI_UpdateUI(IDocHostUIHandler FAR *This)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE UI_EnableModeless(IDocHostUIHandler FAR *This,
        BOOL fEnable)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
UI_OnDocWindowActivate(IDocHostUIHandler FAR *This, BOOL fActivate)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
UI_OnFrameWindowActivate(IDocHostUIHandler FAR *This, BOOL fActivate)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
UI_ResizeBorder(IDocHostUIHandler FAR *This, LPCRECT prcBorder,
                IOleInPlaceUIWindow __RPC_FAR *pUIWindow, BOOL fRameWindow)
{
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE
UI_TranslateAccelerator(IDocHostUIHandler FAR *This, LPMSG lpMsg,
                        const GUID __RPC_FAR *pguidCmdGroup, DWORD nCmdID)
{
    return S_FALSE;
}
static HRESULT STDMETHODCALLTYPE UI_GetOptionKeyPath(
    IDocHostUIHandler FAR *This, LPOLESTR __RPC_FAR *pchKey, DWORD dw)
{
    return S_FALSE;
}
static HRESULT STDMETHODCALLTYPE UI_GetDropTarget(
    IDocHostUIHandler FAR *This, IDropTarget __RPC_FAR *pDropTarget,
    IDropTarget __RPC_FAR *__RPC_FAR *ppDropTarget)
{
    return S_FALSE;
}
static HRESULT STDMETHODCALLTYPE UI_GetExternal(
    IDocHostUIHandler FAR *This, IDispatch __RPC_FAR *__RPC_FAR *ppDispatch)
{
    *ppDispatch = (IDispatch *)(This + 1);
    return S_OK;
}
static HRESULT STDMETHODCALLTYPE UI_TranslateUrl(
    IDocHostUIHandler FAR *This, DWORD dwTranslate, OLECHAR __RPC_FAR *pchURLIn,
    OLECHAR __RPC_FAR *__RPC_FAR *ppchURLOut)
{
    *ppchURLOut = 0;
    return S_FALSE;
}
static HRESULT STDMETHODCALLTYPE
UI_FilterDataObject(IDocHostUIHandler FAR *This, IDataObject __RPC_FAR *pDO,
                    IDataObject __RPC_FAR *__RPC_FAR *ppDORet)
{
    *ppDORet = 0;
    return S_FALSE;
}

static const TCHAR *classname = "WebView";
static const SAFEARRAYBOUND ArrayBound = {1, 0};

static IOleClientSiteVtbl MyIOleClientSiteTable = {
    Site_QueryInterface, Site_AddRef,       Site_Release,
    Site_SaveObject,     Site_GetMoniker,   Site_GetContainer,
    Site_ShowObject,     Site_OnShowWindow, Site_RequestNewObjectLayout
};
static IOleInPlaceSiteVtbl MyIOleInPlaceSiteTable = {
    InPlace_QueryInterface,
    InPlace_AddRef,
    InPlace_Release,
    InPlace_GetWindow,
    InPlace_ContextSensitiveHelp,
    InPlace_CanInPlaceActivate,
    InPlace_OnInPlaceActivate,
    InPlace_OnUIActivate,
    InPlace_GetWindowContext,
    InPlace_Scroll,
    InPlace_OnUIDeactivate,
    InPlace_OnInPlaceDeactivate,
    InPlace_DiscardUndoState,
    InPlace_DeactivateAndUndo,
    InPlace_OnPosRectChange
};

static IOleInPlaceFrameVtbl MyIOleInPlaceFrameTable = {
    Frame_QueryInterface,
    Frame_AddRef,
    Frame_Release,
    Frame_GetWindow,
    Frame_ContextSensitiveHelp,
    Frame_GetBorder,
    Frame_RequestBorderSpace,
    Frame_SetBorderSpace,
    Frame_SetActiveObject,
    Frame_InsertMenus,
    Frame_SetMenu,
    Frame_RemoveMenus,
    Frame_SetStatusText,
    Frame_EnableModeless,
    Frame_TranslateAccelerator
};

static IDocHostUIHandlerVtbl MyIDocHostUIHandlerTable = {
    UI_QueryInterface,
    UI_AddRef,
    UI_Release,
    UI_ShowContextMenu,
    UI_GetHostInfo,
    UI_ShowUI,
    UI_HideUI,
    UI_UpdateUI,
    UI_EnableModeless,
    UI_OnDocWindowActivate,
    UI_OnFrameWindowActivate,
    UI_ResizeBorder,
    UI_TranslateAccelerator,
    UI_GetOptionKeyPath,
    UI_GetDropTarget,
    UI_GetExternal,
    UI_TranslateUrl,
    UI_FilterDataObject
};

static void UnEmbedBrowserObject(struct webview *w)
{
    if (w->priv.browser != NULL) {
        (*w->priv.browser)->lpVtbl->Close(*w->priv.browser, OLECLOSE_NOSAVE);
        (*w->priv.browser)->lpVtbl->Release(*w->priv.browser);
        GlobalFree(w->priv.browser);
        w->priv.browser = NULL;
    }
}

static int EmbedBrowserObject(struct webview *w)
{
    RECT rect;
    IWebBrowser2 *webBrowser2 = NULL;
    LPCLASSFACTORY pClassFactory = NULL;
    _IOleClientSiteEx *_iOleClientSiteEx = NULL;
    IOleObject **browser = (IOleObject **)GlobalAlloc(
                               GMEM_FIXED, sizeof(IOleObject *) + sizeof(_IOleClientSiteEx));
    if (browser == NULL) {
        goto error;
    }
    w->priv.browser = browser;

    _iOleClientSiteEx = (_IOleClientSiteEx *)(browser + 1);
    _iOleClientSiteEx->client.lpVtbl = &MyIOleClientSiteTable;
    _iOleClientSiteEx->inplace.inplace.lpVtbl = &MyIOleInPlaceSiteTable;
    _iOleClientSiteEx->inplace.frame.frame.lpVtbl = &MyIOleInPlaceFrameTable;
    _iOleClientSiteEx->inplace.frame.window = w->priv.hwnd;
    _iOleClientSiteEx->ui.ui.lpVtbl = &MyIDocHostUIHandlerTable;
    _iOleClientSiteEx->external.lpVtbl = &ExternalDispatchTable;

    if (CoGetClassObject(iid_unref(&CLSID_WebBrowser),
                         CLSCTX_INPROC_SERVER | CLSCTX_INPROC_HANDLER, NULL,
                         iid_unref(&IID_IClassFactory),
                         (void **)&pClassFactory) != S_OK) {
        goto error;
    }

    if (pClassFactory == NULL) {
        goto error;
    }

    if (pClassFactory->lpVtbl->CreateInstance(pClassFactory, 0,
            iid_unref(&IID_IOleObject),
            (void **)browser) != S_OK) {
        goto error;
    }
    pClassFactory->lpVtbl->Release(pClassFactory);
    if ((*browser)->lpVtbl->SetClientSite(
            *browser, (IOleClientSite *)_iOleClientSiteEx) != S_OK) {
        goto error;
    }
    (*browser)->lpVtbl->SetHostNames(*browser, L"My Host Name", 0);

    if (OleSetContainedObject((struct IUnknown *)(*browser), TRUE) != S_OK) {
        goto error;
    }
    GetClientRect(w->priv.hwnd, &rect);
    if ((*browser)->lpVtbl->DoVerb((*browser), OLEIVERB_SHOW, NULL,
                                   (IOleClientSite *)_iOleClientSiteEx, -1,
                                   w->priv.hwnd, &rect) != S_OK) {
        goto error;
    }
    if ((*browser)->lpVtbl->QueryInterface((*browser),
                                           iid_unref(&IID_IWebBrowser2),
                                           (void **)&webBrowser2) != S_OK) {
        goto error;
    }

    webBrowser2->lpVtbl->put_Left(webBrowser2, 0);
    webBrowser2->lpVtbl->put_Top(webBrowser2, 0);
    webBrowser2->lpVtbl->put_Width(webBrowser2, rect.right);
    webBrowser2->lpVtbl->put_Height(webBrowser2, rect.bottom);
    webBrowser2->lpVtbl->Release(webBrowser2);

    return 0;
error:
    UnEmbedBrowserObject(w);
    if (pClassFactory != NULL) {
        pClassFactory->lpVtbl->Release(pClassFactory);
    }
    if (browser != NULL) {
        GlobalFree(browser);
    }
    return -1;
}

#define WEBVIEW_DATA_URL_PREFIX "data:text/html,"
static long DisplayHTMLPage(struct webview *w)
{
    IWebBrowser2 *webBrowser2;
    VARIANT myURL;
    LPDISPATCH lpDispatch;
    IHTMLDocument2 *htmlDoc2;
    BSTR bstr;
    IOleObject *browserObject;
    SAFEARRAY *sfArray;
    VARIANT *pVar;
    browserObject = *w->priv.browser;
    int isDataURL = 0;
    const char *webview_url = webview_check_url(w->url);
    if (!browserObject->lpVtbl->QueryInterface(
            browserObject, iid_unref(&IID_IWebBrowser2), (void **)&webBrowser2)) {
        LPCSTR webPageName;
        isDataURL = (strncmp(webview_url, WEBVIEW_DATA_URL_PREFIX,
                             strlen(WEBVIEW_DATA_URL_PREFIX)) == 0);
        if (isDataURL) {
            webPageName = "about:blank";
        } else {
            webPageName = (LPCSTR)webview_url;
        }
        VariantInit(&myURL);
        myURL.vt = VT_BSTR;
#ifndef UNICODE
        {
            wchar_t *buffer = webview_to_utf16(webPageName);
            if (buffer == NULL) {
                goto badalloc;
            }
            myURL.bstrVal = SysAllocString(buffer);
            GlobalFree(buffer);
        }
#else
        myURL.bstrVal = SysAllocString(webPageName);
#endif
        if (!myURL.bstrVal) {
badalloc:
            webBrowser2->lpVtbl->Release(webBrowser2);
            return (-6);
        }
        webBrowser2->lpVtbl->Navigate2(webBrowser2, &myURL, 0, 0, 0, 0);
        VariantClear(&myURL);
        if (!isDataURL) {
            return 0;
        }

        char *url = (char *)calloc(1, strlen(webview_url) + 1);
        char *q = url;
        for (const char *p = webview_url + strlen(WEBVIEW_DATA_URL_PREFIX); *q = *p;
             p++, q++) {
            if (*q == '%' && *(p + 1) && *(p + 2)) {
                sscanf(p + 1, "%02x", q);
                p = p + 2;
            }
        }

        if (webBrowser2->lpVtbl->get_Document(webBrowser2, &lpDispatch) == S_OK) {
            if (lpDispatch->lpVtbl->QueryInterface(lpDispatch,
                                                   iid_unref(&IID_IHTMLDocument2),
                                                   (void **)&htmlDoc2) == S_OK) {
                if ((sfArray = SafeArrayCreate(VT_VARIANT, 1,
                                               (SAFEARRAYBOUND *)&ArrayBound))) {
                    if (!SafeArrayAccessData(sfArray, (void **)&pVar)) {
                        pVar->vt = VT_BSTR;
#ifndef UNICODE
                        {
                            wchar_t *buffer = webview_to_utf16(url);
                            if (buffer == NULL) {
                                goto release;
                            }
                            bstr = SysAllocString(buffer);
                            GlobalFree(buffer);
                        }
#else
                        bstr = SysAllocString(string);
#endif
                        if ((pVar->bstrVal = bstr)) {
                            htmlDoc2->lpVtbl->write(htmlDoc2, sfArray);
                            htmlDoc2->lpVtbl->close(htmlDoc2);
                        }
                    }
                    SafeArrayDestroy(sfArray);
                }
release:
                free(url);
                htmlDoc2->lpVtbl->Release(htmlDoc2);
            }
            lpDispatch->lpVtbl->Release(lpDispatch);
        }
        webBrowser2->lpVtbl->Release(webBrowser2);
        return (0);
    }
    return (-5);
}

static LRESULT CALLBACK wndproc(HWND hwnd, UINT uMsg, WPARAM wParam,
                                LPARAM lParam)
{
    struct webview *w = (struct webview *)GetWindowLongPtr(hwnd, GWLP_USERDATA);
    switch (uMsg) {
    case WM_CREATE:
        w = (struct webview *)((CREATESTRUCT *)lParam)->lpCreateParams;
        w->priv.hwnd = hwnd;
        return EmbedBrowserObject(w);
    case WM_DESTROY:
        UnEmbedBrowserObject(w);
        PostQuitMessage(0);
        return TRUE;
    case WM_SIZE: {
        IWebBrowser2 *webBrowser2;
        IOleObject *browser = *w->priv.browser;
        if (browser->lpVtbl->QueryInterface(browser, iid_unref(&IID_IWebBrowser2),
                                            (void **)&webBrowser2) == S_OK) {
            RECT rect;
            GetClientRect(hwnd, &rect);
            webBrowser2->lpVtbl->put_Width(webBrowser2, rect.right);
            webBrowser2->lpVtbl->put_Height(webBrowser2, rect.bottom);
        }
        return TRUE;
    }
    case WM_WEBVIEW_DISPATCH: {
        webview_dispatch_fn f = (webview_dispatch_fn)wParam;
        void *arg = (void *)lParam;
        (*f)(w, arg);
        return TRUE;
    }
    }
    return DefWindowProc(hwnd, uMsg, wParam, lParam);
}

#define WEBVIEW_KEY_FEATURE_BROWSER_EMULATION                                  \
  "Software\\Microsoft\\Internet "                                             \
  "Explorer\\Main\\FeatureControl\\FEATURE_BROWSER_EMULATION"

static int webview_fix_ie_compat_mode()
{
    HKEY hKey;
    DWORD ie_version = 11000;
    TCHAR appname[MAX_PATH + 1];
    TCHAR *p;
    if (GetModuleFileName(NULL, appname, MAX_PATH + 1) == 0) {
        return -1;
    }
    for (p = &appname[strlen(appname) - 1]; p != appname && *p != '\\'; p--)
        ;
    p++;
    if (RegCreateKey(HKEY_CURRENT_USER, WEBVIEW_KEY_FEATURE_BROWSER_EMULATION,
                     &hKey) != ERROR_SUCCESS) {
        return -1;
    }
    if (RegSetValueEx(hKey, p, 0, REG_DWORD, (BYTE *)&ie_version,
                      sizeof(ie_version)) != ERROR_SUCCESS) {
        RegCloseKey(hKey);
        return -1;
    }
    RegCloseKey(hKey);
    return 0;
}

static int webview_init(struct webview *w)
{
    WNDCLASSEX wc;
    HINSTANCE hInstance;
    STARTUPINFO info;
    DWORD style;
    RECT clientRect;
    RECT rect;

    if (webview_fix_ie_compat_mode() < 0) {
        return -1;
    }

    hInstance = GetModuleHandle(NULL);
    if (hInstance == NULL) {
        return -1;
    }
    GetStartupInfo(&info);
    if (OleInitialize(NULL) != S_OK) {
        return -1;
    }
    ZeroMemory(&wc, sizeof(WNDCLASSEX));
    wc.cbSize = sizeof(WNDCLASSEX);
    wc.hInstance = hInstance;
    wc.lpfnWndProc = wndproc;
    wc.lpszClassName = classname;
    RegisterClassEx(&wc);

    style = WS_OVERLAPPEDWINDOW;
    if (!w->resizable) {
        style = WS_OVERLAPPED | WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU;
    }

    rect.left = 0;
    rect.top = 0;
    rect.right = w->width;
    rect.bottom = w->height;
    AdjustWindowRect(&rect, WS_OVERLAPPEDWINDOW, 0);

    GetClientRect(GetDesktopWindow(), &clientRect);
    int left = (clientRect.right / 2) - ((rect.right - rect.left) / 2);
    int top = (clientRect.bottom / 2) - ((rect.bottom - rect.top) / 2);
    rect.right = rect.right - rect.left + left;
    rect.left = left;
    rect.bottom = rect.bottom - rect.top + top;
    rect.top = top;

    w->priv.hwnd =
        CreateWindowEx(0, classname, w->title, style, rect.left, rect.top,
                       rect.right - rect.left, rect.bottom - rect.top,
                       HWND_DESKTOP, NULL, hInstance, (void *)w);
    if (w->priv.hwnd == 0) {
        OleUninitialize();
        return -1;
    }

    SetWindowLongPtr(w->priv.hwnd, GWLP_USERDATA, (LONG_PTR)w);

    DisplayHTMLPage(w);

    SetWindowText(w->priv.hwnd, w->title);
    ShowWindow(w->priv.hwnd, info.wShowWindow);
    UpdateWindow(w->priv.hwnd);
    SetFocus(w->priv.hwnd);

    return 0;
}

static int webview_loop(struct webview *w, int blocking)
{
    MSG msg;
    if (blocking) {
        GetMessage(&msg, 0, 0, 0);
    } else {
        PeekMessage(&msg, 0, 0, 0, PM_REMOVE);
    }
    switch (msg.message) {
    case WM_QUIT:
        return -1;
    case WM_COMMAND:
    case WM_KEYDOWN:
    case WM_KEYUP: {
        HRESULT r = S_OK;
        IWebBrowser2 *webBrowser2;
        IOleObject *browser = *w->priv.browser;
        if (browser->lpVtbl->QueryInterface(browser, iid_unref(&IID_IWebBrowser2),
                                            (void **)&webBrowser2) == S_OK) {
            IOleInPlaceActiveObject *pIOIPAO;
            if (browser->lpVtbl->QueryInterface(
                    browser, iid_unref(&IID_IOleInPlaceActiveObject),
                    (void **)&pIOIPAO) == S_OK) {
                r = pIOIPAO->lpVtbl->TranslateAccelerator(pIOIPAO, &msg);
                pIOIPAO->lpVtbl->Release(pIOIPAO);
            }
            webBrowser2->lpVtbl->Release(webBrowser2);
        }
        if (r != S_FALSE) {
            break;
        }
    }
    default:
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return 0;
}

static int webview_eval(struct webview *w, const char *js)
{
    IWebBrowser2 *webBrowser2;
    IHTMLDocument2 *htmlDoc2;
    IDispatch *docDispatch;
    IDispatch *scriptDispatch;
    if ((*w->priv.browser)
        ->lpVtbl->QueryInterface((*w->priv.browser),
                                 iid_unref(&IID_IWebBrowser2),
                                 (void **)&webBrowser2) != S_OK) {
        return -1;
    }

    if (webBrowser2->lpVtbl->get_Document(webBrowser2, &docDispatch) != S_OK) {
        return -1;
    }
    if (docDispatch->lpVtbl->QueryInterface(docDispatch,
                                            iid_unref(&IID_IHTMLDocument2),
                                            (void **)&htmlDoc2) != S_OK) {
        return -1;
    }
    if (htmlDoc2->lpVtbl->get_Script(htmlDoc2, &scriptDispatch) != S_OK) {
        return -1;
    }
    DISPID dispid;
    BSTR evalStr = SysAllocString(L"eval");
    if (scriptDispatch->lpVtbl->GetIDsOfNames(
            scriptDispatch, iid_unref(&IID_NULL), &evalStr, 1,
            LOCALE_SYSTEM_DEFAULT, &dispid) != S_OK) {
        SysFreeString(evalStr);
        return -1;
    }
    SysFreeString(evalStr);

    DISPPARAMS params;
    VARIANT arg;
    VARIANT result;
    EXCEPINFO excepInfo;
    UINT nArgErr = (UINT) - 1;
    params.cArgs = 1;
    params.cNamedArgs = 0;
    params.rgvarg = &arg;
    arg.vt = VT_BSTR;
    static const char *prologue = "(function(){";
    static const char *epilogue = ";})();";
    int n = strlen(prologue) + strlen(epilogue) + strlen(js) + 1;
    char *eval = (char *)malloc(n);
    strcpy(eval, prologue);
    strcat(eval, js);
    strcat(eval, epilogue);
    wchar_t *buf = webview_to_utf16(eval);
    if (buf == NULL) {
        return -1;
    }
    arg.bstrVal = SysAllocString(buf);
    if (scriptDispatch->lpVtbl->Invoke(
            scriptDispatch, dispid, iid_unref(&IID_NULL), 0, DISPATCH_METHOD,
            &params, &result, &excepInfo, &nArgErr) != S_OK) {
        return -1;
    }
    SysFreeString(arg.bstrVal);
    free(eval);
    scriptDispatch->lpVtbl->Release(scriptDispatch);
    htmlDoc2->lpVtbl->Release(htmlDoc2);
    docDispatch->lpVtbl->Release(docDispatch);
    return 0;
}

static void webview_dispatch(struct webview *w, webview_dispatch_fn fn,
                             void *arg)
{
    PostMessageW(w->priv.hwnd, WM_WEBVIEW_DISPATCH, (WPARAM)fn, (LPARAM)arg);
}

static void webview_set_title(struct webview *w, const char *title)
{
    SetWindowText(w->priv.hwnd, title);
}

static void webview_set_fullscreen(struct webview *w, int fullscreen)
{
    if (w->priv.is_fullscreen == !!fullscreen) {
        return;
    }
    if (w->priv.is_fullscreen == 0) {
        w->priv.saved_style = GetWindowLong(w->priv.hwnd, GWL_STYLE);
        w->priv.saved_ex_style = GetWindowLong(w->priv.hwnd, GWL_EXSTYLE);
        GetWindowRect(w->priv.hwnd, &w->priv.saved_rect);
    }
    w->priv.is_fullscreen = !!fullscreen;
    if (fullscreen) {
        MONITORINFO monitor_info;
        SetWindowLong(w->priv.hwnd, GWL_STYLE, w->priv.saved_style & ~(WS_CAPTION | WS_THICKFRAME));
        SetWindowLong(w->priv.hwnd, GWL_EXSTYLE, w->priv.saved_ex_style & ~(WS_EX_DLGMODALFRAME |  WS_EX_WINDOWEDGE | WS_EX_CLIENTEDGE | WS_EX_STATICEDGE));
        monitor_info.cbSize = sizeof(monitor_info);
        GetMonitorInfo(MonitorFromWindow(w->priv.hwnd, MONITOR_DEFAULTTONEAREST), &monitor_info);
        RECT r;
        r.left = monitor_info.rcMonitor.left;
        r.top = monitor_info.rcMonitor.top;
        r.right = monitor_info.rcMonitor.right;
        r.bottom = monitor_info.rcMonitor.bottom;
        SetWindowPos(w->priv.hwnd, NULL, r.left, r.top, r.right - r.left, r.bottom - r.top, SWP_NOZORDER | SWP_NOACTIVATE | SWP_FRAMECHANGED);
    } else {
        SetWindowLong(w->priv.hwnd, GWL_STYLE, w->priv.saved_style);
        SetWindowLong(w->priv.hwnd, GWL_EXSTYLE, w->priv.saved_ex_style);
        SetWindowPos(w->priv.hwnd, NULL, w->priv.saved_rect.left, w->priv.saved_rect.top, w->priv.saved_rect.right - w->priv.saved_rect.left, w->priv.saved_rect.bottom - w->priv.saved_rect.top, SWP_NOZORDER | SWP_NOACTIVATE | SWP_FRAMECHANGED);
    }
}

/* These are missing parts from MinGW */
#ifndef __IFileDialog_INTERFACE_DEFINED__
#define __IFileDialog_INTERFACE_DEFINED__
enum _FILEOPENDIALOGOPTIONS {
    FOS_OVERWRITEPROMPT = 0x2,
    FOS_STRICTFILETYPES = 0x4,
    FOS_NOCHANGEDIR = 0x8,
    FOS_PICKFOLDERS = 0x20,
    FOS_FORCEFILESYSTEM = 0x40,
    FOS_ALLNONSTORAGEITEMS = 0x80,
    FOS_NOVALIDATE = 0x100,
    FOS_ALLOWMULTISELECT = 0x200,
    FOS_PATHMUSTEXIST = 0x800,
    FOS_FILEMUSTEXIST = 0x1000,
    FOS_CREATEPROMPT = 0x2000,
    FOS_SHAREAWARE = 0x4000,
    FOS_NOREADONLYRETURN = 0x8000,
    FOS_NOTESTFILECREATE = 0x10000,
    FOS_HIDEMRUPLACES = 0x20000,
    FOS_HIDEPINNEDPLACES = 0x40000,
    FOS_NODEREFERENCELINKS = 0x100000,
    FOS_DONTADDTORECENT = 0x2000000,
    FOS_FORCESHOWHIDDEN = 0x10000000,
    FOS_DEFAULTNOMINIMODE = 0x20000000,
    FOS_FORCEPREVIEWPANEON = 0x40000000
};
typedef DWORD FILEOPENDIALOGOPTIONS;
typedef enum FDAP { FDAP_BOTTOM = 0, FDAP_TOP = 1 } FDAP;
DEFINE_GUID(IID_IFileDialog, 0x42f85136, 0xdb7e, 0x439c, 0x85, 0xf1, 0xe4, 0x07,
            0x5d, 0x13, 0x5f, 0xc8);
typedef struct IFileDialogVtbl {
    BEGIN_INTERFACE
    HRESULT(STDMETHODCALLTYPE *QueryInterface)
    (IFileDialog *This, REFIID riid, void **ppvObject);
    ULONG(STDMETHODCALLTYPE *AddRef)(IFileDialog *This);
    ULONG(STDMETHODCALLTYPE *Release)(IFileDialog *This);
    HRESULT(STDMETHODCALLTYPE *Show)(IFileDialog *This, HWND hwndOwner);
    HRESULT(STDMETHODCALLTYPE *SetFileTypes)
    (IFileDialog *This, UINT cFileTypes, const COMDLG_FILTERSPEC *rgFilterSpec);
    HRESULT(STDMETHODCALLTYPE *SetFileTypeIndex)
    (IFileDialog *This, UINT iFileType);
    HRESULT(STDMETHODCALLTYPE *GetFileTypeIndex)
    (IFileDialog *This, UINT *piFileType);
    HRESULT(STDMETHODCALLTYPE *Advise)
    (IFileDialog *This, IFileDialogEvents *pfde, DWORD *pdwCookie);
    HRESULT(STDMETHODCALLTYPE *Unadvise)(IFileDialog *This, DWORD dwCookie);
    HRESULT(STDMETHODCALLTYPE *SetOptions)
    (IFileDialog *This, FILEOPENDIALOGOPTIONS fos);
    HRESULT(STDMETHODCALLTYPE *GetOptions)
    (IFileDialog *This, FILEOPENDIALOGOPTIONS *pfos);
    HRESULT(STDMETHODCALLTYPE *SetDefaultFolder)
    (IFileDialog *This, IShellItem *psi);
    HRESULT(STDMETHODCALLTYPE *SetFolder)(IFileDialog *This, IShellItem *psi);
    HRESULT(STDMETHODCALLTYPE *GetFolder)(IFileDialog *This, IShellItem **ppsi);
    HRESULT(STDMETHODCALLTYPE *GetCurrentSelection)
    (IFileDialog *This, IShellItem **ppsi);
    HRESULT(STDMETHODCALLTYPE *SetFileName)(IFileDialog *This, LPCWSTR pszName);
    HRESULT(STDMETHODCALLTYPE *GetFileName)(IFileDialog *This, LPWSTR *pszName);
    HRESULT(STDMETHODCALLTYPE *SetTitle)(IFileDialog *This, LPCWSTR pszTitle);
    HRESULT(STDMETHODCALLTYPE *SetOkButtonLabel)
    (IFileDialog *This, LPCWSTR pszText);
    HRESULT(STDMETHODCALLTYPE *SetFileNameLabel)
    (IFileDialog *This, LPCWSTR pszLabel);
    HRESULT(STDMETHODCALLTYPE *GetResult)(IFileDialog *This, IShellItem **ppsi);
    HRESULT(STDMETHODCALLTYPE *AddPlace)
    (IFileDialog *This, IShellItem *psi, FDAP fdap);
    HRESULT(STDMETHODCALLTYPE *SetDefaultExtension)
    (IFileDialog *This, LPCWSTR pszDefaultExtension);
    HRESULT(STDMETHODCALLTYPE *Close)(IFileDialog *This, HRESULT hr);
    HRESULT(STDMETHODCALLTYPE *SetClientGuid)(IFileDialog *This, REFGUID guid);
    HRESULT(STDMETHODCALLTYPE *ClearClientData)(IFileDialog *This);
    HRESULT(STDMETHODCALLTYPE *SetFilter)
    (IFileDialog *This, IShellItemFilter *pFilter);
    END_INTERFACE
} IFileDialogVtbl;
interface IFileDialog {
    CONST_VTBL IFileDialogVtbl *lpVtbl;
};
DEFINE_GUID(IID_IFileOpenDialog, 0xd57c7288, 0xd4ad, 0x4768, 0xbe, 0x02, 0x9d,
            0x96, 0x95, 0x32, 0xd9, 0x60);
DEFINE_GUID(IID_IFileSaveDialog, 0x84bccd23, 0x5fde, 0x4cdb, 0xae, 0xa4, 0xaf,
            0x64, 0xb8, 0x3d, 0x78, 0xab);
#endif

static void webview_dialog(struct webview *w, enum webview_dialog_type dlgtype,
                           int flags, const char *title, const char *arg,
                           char *result, size_t resultsz)
{
    if (dlgtype == WEBVIEW_DIALOG_TYPE_OPEN ||
        dlgtype == WEBVIEW_DIALOG_TYPE_SAVE) {
        IFileDialog *dlg = NULL;
        IShellItem *res = NULL;
        WCHAR *ws = NULL;
        char *s = NULL;
        FILEOPENDIALOGOPTIONS opts, add_opts;
        if (dlgtype == WEBVIEW_DIALOG_TYPE_OPEN) {
            if (CoCreateInstance(
                    iid_unref(&CLSID_FileOpenDialog), NULL, CLSCTX_INPROC_SERVER,
                    iid_unref(&IID_IFileOpenDialog), (void **)&dlg) != S_OK) {
                goto error_dlg;
            }
            if (flags & WEBVIEW_DIALOG_FLAG_DIRECTORY) {
                add_opts |= FOS_PICKFOLDERS;
            }
            add_opts |= FOS_NOCHANGEDIR | FOS_ALLNONSTORAGEITEMS | FOS_NOVALIDATE |
                        FOS_PATHMUSTEXIST | FOS_FILEMUSTEXIST | FOS_SHAREAWARE |
                        FOS_NOTESTFILECREATE | FOS_NODEREFERENCELINKS |
                        FOS_FORCESHOWHIDDEN | FOS_DEFAULTNOMINIMODE;
        } else {
            if (CoCreateInstance(
                    iid_unref(&CLSID_FileSaveDialog), NULL, CLSCTX_INPROC_SERVER,
                    iid_unref(&IID_IFileSaveDialog), (void **)&dlg) != S_OK) {
                goto error_dlg;
            }
            add_opts |= FOS_OVERWRITEPROMPT | FOS_NOCHANGEDIR |
                        FOS_ALLNONSTORAGEITEMS | FOS_NOVALIDATE | FOS_SHAREAWARE |
                        FOS_NOTESTFILECREATE | FOS_NODEREFERENCELINKS |
                        FOS_FORCESHOWHIDDEN | FOS_DEFAULTNOMINIMODE;
        }
        if (dlg->lpVtbl->GetOptions(dlg, &opts) != S_OK) {
            goto error_dlg;
        }
        opts &= ~FOS_NOREADONLYRETURN;
        opts |= add_opts;
        if (dlg->lpVtbl->SetOptions(dlg, opts) != S_OK) {
            goto error_dlg;
        }
        if (dlg->lpVtbl->Show(dlg, w->priv.hwnd) != S_OK) {
            goto error_dlg;
        }
        if (dlg->lpVtbl->GetResult(dlg, &res) != S_OK) {
            goto error_dlg;
        }
        if (res->lpVtbl->GetDisplayName(res, SIGDN_FILESYSPATH, &ws) != S_OK) {
            goto error_result;
        }
        s = webview_from_utf16(ws);
        strncpy(result, s, resultsz);
        result[resultsz - 1] = '\0';
        CoTaskMemFree(ws);
error_result:
        res->lpVtbl->Release(res);
error_dlg:
        dlg->lpVtbl->Release(dlg);
        return;
    } else if (dlgtype == WEBVIEW_DIALOG_TYPE_ALERT) {
#if 0
        /* MinGW often doesn't contain TaskDialog, so we'll use MessageBox for now */
        WCHAR *wtitle = webview_to_utf16(title);
        WCHAR *warg = webview_to_utf16(arg);
        TaskDialog(w->priv.hwnd, NULL, NULL, wtitle, warg, 0, NULL, NULL);
        GlobalFree(warg);
        GlobalFree(wtitle);
#else
        UINT type = MB_OK;
        switch (flags & WEBVIEW_DIALOG_FLAG_ALERT_MASK) {
        case WEBVIEW_DIALOG_FLAG_INFO:
            type |= MB_ICONINFORMATION;
            break;
        case WEBVIEW_DIALOG_FLAG_WARNING:
            type |= MB_ICONWARNING;
            break;
        case WEBVIEW_DIALOG_FLAG_ERROR:
            type |= MB_ICONERROR;
            break;
        }
        MessageBox(w->priv.hwnd, arg, title, type);
#endif
    }
}

static void webview_terminate(struct webview *w) { PostQuitMessage(0); }
static void webview_exit(struct webview *w) { OleUninitialize(); }
static void webview_print_log(const char *s) { OutputDebugString(s); }

#endif /* WEBVIEW_WINAPI */

#if defined(WEBVIEW_COCOA)
#if (!defined MAC_OS_X_VERSION_10_12) ||                                       \
    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_12
#define NSWindowStyleMaskResizable NSResizableWindowMask
#define NSWindowStyleMaskMiniaturizable NSMiniaturizableWindowMask
#define NSWindowStyleMaskTitled NSTitledWindowMask
#define NSWindowStyleMaskClosable NSClosableWindowMask
#define NSWindowStyleMaskFullScreen NSFullScreenWindowMask
#define NSEventMaskAny NSAnyEventMask
#define NSEventModifierFlagCommand NSCommandKeyMask
#define NSEventModifierFlagOption NSAlternateKeyMask
#define NSAlertStyleInformational NSInformationalAlertStyle
#endif /* MAC_OS_X_VERSION_10_12 */
#if (!defined MAC_OS_X_VERSION_10_13) ||                                       \
    MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_13
#define NSModalResponseOK NSFileHandlingPanelOKButton
#endif /* MAC_OS_X_VERSION_10_12, MAC_OS_X_VERSION_10_13 */
static void webview_window_will_close(id self, SEL cmd, id notification)
{
    struct webview *w =
        (struct webview *)objc_getAssociatedObject(self, "webview");
    webview_terminate(w);
}

static BOOL webview_is_selector_excluded_from_web_script(id self, SEL cmd,
        SEL selector)
{
    return selector != @selector(invoke:);
}

static NSString *webview_webscript_name_for_selector(id self, SEL cmd,
        SEL selector)
{
    return selector == @selector(invoke:) ? @"invoke" : nil;
}

static void webview_did_clear_window_object(id self, SEL cmd, id webview,
        id script, id frame)
{
    [script setValue:self forKey:@"external"];
}

static void webview_external_invoke(id self, SEL cmd, id arg)
{
    struct webview *w =
        (struct webview *)objc_getAssociatedObject(self, "webview");
    if (w == NULL || w->external_invoke_cb == NULL) {
        return;
    }
    if ([arg isKindOfClass:[NSString class]] == NO) {
        return;
    }
    w->external_invoke_cb(w, [(NSString *)(arg)UTF8String]);
}

static int webview_init(struct webview *w)
{
    w->priv.pool = [[NSAutoreleasePool alloc] init];
    [NSApplication sharedApplication];

    Class webViewDelegateClass =
        objc_allocateClassPair([NSObject class], "WebViewDelegate", 0);
    class_addMethod(webViewDelegateClass, sel_registerName("windowWillClose:"),
                    (IMP)webview_window_will_close, "v@:@");
    class_addMethod(object_getClass(webViewDelegateClass),
                    sel_registerName("isSelectorExcludedFromWebScript:"),
                    (IMP)webview_is_selector_excluded_from_web_script, "c@::");
    class_addMethod(object_getClass(webViewDelegateClass),
                    sel_registerName("webScriptNameForSelector:"),
                    (IMP)webview_webscript_name_for_selector, "c@::");
    class_addMethod(webViewDelegateClass,
                    sel_registerName("webView:didClearWindowObject:forFrame:"),
                    (IMP)webview_did_clear_window_object, "v@:@@@");
    class_addMethod(webViewDelegateClass, sel_registerName("invoke:"),
                    (IMP)webview_external_invoke, "v@:@");
    objc_registerClassPair(webViewDelegateClass);

    w->priv.windowDelegate = [[webViewDelegateClass alloc] init];
    objc_setAssociatedObject(w->priv.windowDelegate, "webview", (id)(w),
                             OBJC_ASSOCIATION_ASSIGN);

    NSString *nsTitle = [NSString stringWithUTF8String:w->title];
    NSRect r = NSMakeRect(0, 0, w->width, w->height);
    NSUInteger style = NSWindowStyleMaskTitled | NSWindowStyleMaskClosable |
                       NSWindowStyleMaskMiniaturizable;
    if (w->resizable) {
        style = style | NSWindowStyleMaskResizable;
    }
    w->priv.window = [[NSWindow alloc] initWithContentRect:r
                      styleMask:style
                      backing:NSBackingStoreBuffered
                      defer:NO];
    [w->priv.window autorelease];
    [w->priv.window setTitle:nsTitle];
    [w->priv.window setDelegate:w->priv.windowDelegate];
    [w->priv.window center];

    [[NSUserDefaults standardUserDefaults] setBool:!!w->debug
     forKey:@"WebKitDeveloperExtras"];
    [[NSUserDefaults standardUserDefaults] synchronize];
    w->priv.webview =
        [[WebView alloc] initWithFrame:r frameName:@"WebView" groupName:nil];
    NSURL *nsURL = [NSURL
                    URLWithString:[NSString stringWithUTF8String:webview_check_url(w->url)]];
    [[w->priv.webview mainFrame] loadRequest:[NSURLRequest requestWithURL:nsURL]];

    [w->priv.webview setAutoresizesSubviews:YES];
    [w->priv.webview
     setAutoresizingMask:NSViewWidthSizable | NSViewHeightSizable];
    w->priv.webview.frameLoadDelegate = w->priv.windowDelegate;
    [[w->priv.window contentView] addSubview:w->priv.webview];
    [w->priv.window orderFrontRegardless];

    [NSApp setActivationPolicy:NSApplicationActivationPolicyRegular];
    [NSApp finishLaunching];
    [NSApp activateIgnoringOtherApps:YES];

    NSMenu *menubar = [[[NSMenu alloc] initWithTitle:@""] autorelease];

    NSString *appName = [[NSProcessInfo processInfo] processName];
    NSMenuItem *appMenuItem =
        [[[NSMenuItem alloc] initWithTitle:appName action:NULL keyEquivalent:@""]
         autorelease];
    NSMenu *appMenu = [[[NSMenu alloc] initWithTitle:appName] autorelease];
    [appMenuItem setSubmenu:appMenu];
    [menubar addItem:appMenuItem];

    NSString *title = [@"Hide " stringByAppendingString:appName];
    NSMenuItem *item = [[[NSMenuItem alloc] initWithTitle:title
                         action:@selector(hide:)
                         keyEquivalent:@"h"] autorelease];
    [appMenu addItem:item];
    item = [[[NSMenuItem alloc] initWithTitle:@"Hide Others"
             action:@selector(hideOtherApplications:)
             keyEquivalent:@"h"] autorelease];
    [item setKeyEquivalentModifierMask:(NSEventModifierFlagOption |
                                        NSEventModifierFlagCommand)];
    [appMenu addItem:item];
    item = [[[NSMenuItem alloc] initWithTitle:@"Show All"
             action:@selector(unhideAllApplications:)
             keyEquivalent:@""] autorelease];
    [appMenu addItem:item];
    [appMenu addItem:[NSMenuItem separatorItem]];

    title = [@"Quit " stringByAppendingString:appName];
    item = [[[NSMenuItem alloc] initWithTitle:title
             action:@selector(terminate:)
             keyEquivalent:@"q"] autorelease];
    [appMenu addItem:item];

    [NSApp setMainMenu:menubar];

    w->priv.should_exit = 0;
    return 0;
}

static int webview_loop(struct webview *w, int blocking)
{
    NSDate *until = (blocking ? [NSDate distantFuture] : [NSDate distantPast]);
    NSEvent *event = [NSApp nextEventMatchingMask:NSEventMaskAny
                      untilDate:until
                      inMode:NSDefaultRunLoopMode
                      dequeue:YES];
    if (event) {
        [NSApp sendEvent:event];
    }
    return w->priv.should_exit;
}

static int webview_eval(struct webview *w, const char *js)
{
    NSString *nsJS = [NSString stringWithUTF8String:js];
    [[w->priv.webview windowScriptObject] evaluateWebScript:nsJS];
    return 0;
}

static void webview_set_title(struct webview *w, const char *title)
{
    NSString *nsTitle = [NSString stringWithUTF8String:title];
    [w->priv.window setTitle:nsTitle];
}

static void webview_set_fullscreen(struct webview *w, int fullscreen)
{
    int b = ((([w->priv.window styleMask] & NSWindowStyleMaskFullScreen) == NSWindowStyleMaskFullScreen) ? 1 : 0);
    if (b != fullscreen) {
        [w->priv.window toggleFullScreen:nil];
    }
}

static void webview_dialog(struct webview *w, enum webview_dialog_type dlgtype,
                           int flags, const char *title, const char *arg,
                           char *result, size_t resultsz)
{
    if (dlgtype == WEBVIEW_DIALOG_TYPE_OPEN ||
        dlgtype == WEBVIEW_DIALOG_TYPE_SAVE) {
        NSSavePanel *panel;
        if (dlgtype == WEBVIEW_DIALOG_TYPE_OPEN) {
            NSOpenPanel *openPanel = [NSOpenPanel openPanel];
            if (flags & WEBVIEW_DIALOG_FLAG_DIRECTORY) {
                [openPanel setCanChooseFiles:NO];
                [openPanel setCanChooseDirectories:YES];
            } else {
                [openPanel setCanChooseFiles:YES];
                [openPanel setCanChooseDirectories:NO];
            }
            [openPanel setResolvesAliases:NO];
            [openPanel setAllowsMultipleSelection:NO];
            panel = openPanel;
        } else {
            panel = [NSSavePanel savePanel];
        }
        [panel setCanCreateDirectories:YES];
        [panel setShowsHiddenFiles:YES];
        [panel setExtensionHidden:NO];
        [panel setCanSelectHiddenExtension:NO];
        [panel setTreatsFilePackagesAsDirectories:YES];
        [panel beginSheetModalForWindow:w->priv.window
        completionHandler: ^ (NSInteger result) {
            [NSApp stopModalWithCode:result];
        }];
        if ([NSApp runModalForWindow:panel] == NSModalResponseOK) {
            const char *filename = [[[panel URL] path] UTF8String];
            strlcpy(result, filename, resultsz);
        }
    } else if (dlgtype == WEBVIEW_DIALOG_TYPE_ALERT) {
        NSAlert *a = [NSAlert new];
        switch (flags & WEBVIEW_DIALOG_FLAG_ALERT_MASK) {
        case WEBVIEW_DIALOG_FLAG_INFO:
            [a setAlertStyle:NSAlertStyleInformational];
            break;
        case WEBVIEW_DIALOG_FLAG_WARNING:
            NSLog(@"warning");
            [a setAlertStyle:NSAlertStyleWarning];
            break;
        case WEBVIEW_DIALOG_FLAG_ERROR:
            NSLog(@"error");
            [a setAlertStyle:NSAlertStyleCritical];
            break;
        }
        [a setShowsHelp:NO];
        [a setShowsSuppressionButton:NO];
        [a setMessageText:[NSString stringWithUTF8String:title]];
        [a setInformativeText:[NSString stringWithUTF8String:arg]];
        [a addButtonWithTitle:@"OK"];
        [a runModal];
        [a release];
    }
}

static void webview_dispatch_cb(void *arg)
{
    struct webview_dispatch_arg *context = (struct webview_dispatch_arg *)arg;
    (context->fn)(context->w, context->arg);
    free(context);
}

static void webview_dispatch(struct webview *w, webview_dispatch_fn fn,
                             void *arg)
{
    struct webview_dispatch_arg *context = (struct webview_dispatch_arg *)malloc(
            sizeof(struct webview_dispatch_arg));
    context->w = w;
    context->arg = arg;
    context->fn = fn;
    dispatch_async_f(dispatch_get_main_queue(), context, webview_dispatch_cb);
}

static void webview_terminate(struct webview *w) { w->priv.should_exit = 1; }
static void webview_exit(struct webview *w) { [NSApp terminate:NSApp]; }
static void webview_print_log(const char *s) { NSLog(@"%s", s); }

#endif /* WEBVIEW_COCOA */

#ifdef __cplusplus
}
#endif

#endif /* WEBVIEW_H */
