RetroZilla/modules/plugin/tools/sdk/samples/scriptable/unix/plugin.cpp
2015-10-20 23:03:22 -04:00

297 lines
8.1 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* 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 mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include <X11/Xlib.h>
#include <X11/Intrinsic.h>
#include <X11/cursorfont.h>
#include "plugin.h"
#include "nsIServiceManager.h"
#include "nsISupportsUtils.h" // some usefule macros are defined here
#define MIME_TYPES_HANDLED "application/scriptable-plugin"
#define PLUGIN_NAME "Scriptable Example Plugin for Mozilla"
#define MIME_TYPES_DESCRIPTION MIME_TYPES_HANDLED":scr:"PLUGIN_NAME
#define PLUGIN_DESCRIPTION PLUGIN_NAME " (Plug-ins SDK sample)"
char* NPP_GetMIMEDescription(void)
{
return(MIME_TYPES_DESCRIPTION);
}
//////////////////////////////////////
//
// general initialization and shutdown
//
NPError NS_PluginInitialize()
{
return NPERR_NO_ERROR;
}
void NS_PluginShutdown()
{
}
// get values per plugin
NPError NS_PluginGetValue(NPPVariable aVariable, void *aValue)
{
NPError err = NPERR_NO_ERROR;
switch (aVariable) {
case NPPVpluginNameString:
*((char **)aValue) = PLUGIN_NAME;
break;
case NPPVpluginDescriptionString:
*((char **)aValue) = PLUGIN_DESCRIPTION;
break;
default:
err = NPERR_INVALID_PARAM;
break;
}
return err;
}
/////////////////////////////////////////////////////////////
//
// construction and destruction of our plugin instance object
//
nsPluginInstanceBase * NS_NewPluginInstance(nsPluginCreateData * aCreateDataStruct)
{
if(!aCreateDataStruct)
return NULL;
nsPluginInstance * plugin = new nsPluginInstance(aCreateDataStruct->instance);
return plugin;
}
void NS_DestroyPluginInstance(nsPluginInstanceBase * aPlugin)
{
if(aPlugin)
delete (nsPluginInstance *)aPlugin;
}
////////////////////////////////////////
//
// nsPluginInstance class implementation
//
nsPluginInstance::nsPluginInstance(NPP aInstance) : nsPluginInstanceBase(),
mInstance(aInstance),
mInitialized(FALSE),
mWindow(0),
mXtwidget(0),
mFontInfo(0),
mScriptablePeer(NULL)
{
mString[0] = '\0';
}
nsPluginInstance::~nsPluginInstance()
{
// mScriptablePeer may be also held by the browser
// so releasing it here does not guarantee that it is over
// we should take precaution in case it will be called later
// and zero its mPlugin member
mScriptablePeer->SetInstance(NULL);
NS_IF_RELEASE(mScriptablePeer);
}
static void
xt_event_handler(Widget xtwidget, nsPluginInstance *plugin, XEvent *xevent, Boolean *b)
{
switch (xevent->type) {
case Expose:
// get rid of all other exposure events
if (plugin) {
//while(XCheckTypedWindowEvent(plugin->Display(), plugin->Window(), Expose, xevent));
plugin->draw();
}
default:
break;
}
}
void nsPluginInstance::draw()
{
unsigned int h = mHeight/2;
unsigned int w = 3 * mWidth/4;
int x = (mWidth - w)/2; // center
int y = h/2;
XClearArea(mDisplay, mWindow, 0, 0, 0, 0, False);
if (x >= 0 && y >= 0) {
GC gc = XCreateGC(mDisplay, mWindow, 0, NULL);
if (!gc)
return;
XDrawRectangle(mDisplay, mWindow, gc, x, y, w, h);
if (mString[0]) {
int l = strlen(mString);
int fmba = mFontInfo->max_bounds.ascent;
int fmbd = mFontInfo->max_bounds.descent;
int fh = fmba + fmbd;
y += fh;
x += 32;
XDrawString(mDisplay, mWindow, gc, x, y, mString, l);
}
XFreeGC(mDisplay, gc);
}
}
NPBool nsPluginInstance::init(NPWindow* aWindow)
{
if(aWindow == NULL)
return FALSE;
if (SetWindow(aWindow))
mInitialized = TRUE;
return mInitialized;
}
NPError nsPluginInstance::SetWindow(NPWindow* aWindow)
{
if(aWindow == NULL)
return FALSE;
mX = aWindow->x;
mY = aWindow->y;
mWidth = aWindow->width;
mHeight = aWindow->height;
if (mWindow != (Window) aWindow->window) {
mWindow = (Window) aWindow->window;
NPSetWindowCallbackStruct *ws_info = (NPSetWindowCallbackStruct *)aWindow->ws_info;
mDisplay = ws_info->display;
mVisual = ws_info->visual;
mDepth = ws_info->depth;
mColormap = ws_info->colormap;
if (!mFontInfo) {
if (!(mFontInfo = XLoadQueryFont(mDisplay, "9x15")))
printf("Cannot open 9X15 font\n");
}
// add xt event handler
Widget xtwidget = XtWindowToWidget(mDisplay, mWindow);
if (xtwidget && mXtwidget != xtwidget) {
mXtwidget = xtwidget;
long event_mask = ExposureMask;
XSelectInput(mDisplay, mWindow, event_mask);
XtAddEventHandler(xtwidget, event_mask, False, (XtEventHandler)xt_event_handler, this);
}
}
draw();
return TRUE;
}
void nsPluginInstance::shut()
{
mInitialized = FALSE;
}
NPBool nsPluginInstance::isInitialized()
{
return mInitialized;
}
// this will force to draw a version string in the plugin window
void nsPluginInstance::showVersion()
{
const char *ua = NPN_UserAgent(mInstance);
strcpy(mString, ua);
draw();
}
// this will clean the plugin window
void nsPluginInstance::clear()
{
strcpy(mString, "");
draw();
}
// ==============================
// ! Scriptability related code !
// ==============================
//
// here the plugin is asked by Mozilla to tell if it is scriptable
// we should return a valid interface id and a pointer to
// nsScriptablePeer interface which we should have implemented
// and which should be defined in the corressponding *.xpt file
// in the bin/components folder
NPError nsPluginInstance::GetValue(NPPVariable aVariable, void *aValue)
{
NPError rv = NPERR_NO_ERROR;
if (aVariable == NPPVpluginScriptableInstance) {
// addref happens in getter, so we don't addref here
nsIScriptablePluginSample * scriptablePeer = getScriptablePeer();
if (scriptablePeer) {
*(nsISupports **)aValue = scriptablePeer;
} else
rv = NPERR_OUT_OF_MEMORY_ERROR;
}
else if (aVariable == NPPVpluginScriptableIID) {
static nsIID scriptableIID = NS_ISCRIPTABLEPLUGINSAMPLE_IID;
nsIID* ptr = (nsIID *)NPN_MemAlloc(sizeof(nsIID));
if (ptr) {
*ptr = scriptableIID;
*(nsIID **)aValue = ptr;
} else
rv = NPERR_OUT_OF_MEMORY_ERROR;
}
return rv;
}
// ==============================
// ! Scriptability related code !
// ==============================
//
// this method will return the scriptable object (and create it if necessary)
nsScriptablePeer* nsPluginInstance::getScriptablePeer()
{
if (!mScriptablePeer) {
mScriptablePeer = new nsScriptablePeer(this);
if(!mScriptablePeer)
return NULL;
NS_ADDREF(mScriptablePeer);
}
// add reference for the caller requesting the object
NS_ADDREF(mScriptablePeer);
return mScriptablePeer;
}