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