1 /*

     2  * Copyright (c) 2015, 2017, Oracle and/or its affiliates. All rights reserved.

     3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

     4  *

     5  * This code is free software; you can redistribute it and/or modify it

     6  * under the terms of the GNU General Public License version 2 only, as

     7  * published by the Free Software Foundation.  Oracle designates this

     8  * particular file as subject to the "Classpath" exception as provided

     9  * by Oracle in the LICENSE file that accompanied this code.

    10  *

    11  * This code is distributed in the hope that it will be useful, but WITHOUT

    12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

    13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

    14  * version 2 for more details (a copy is included in the LICENSE file that

    15  * accompanied this code).

    16  *

    17  * You should have received a copy of the GNU General Public License version

    18  * 2 along with this work; if not, write to the Free Software Foundation,

    19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

    20  *

    21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

    22  * or visit www.oracle.com if you need additional information or have any

    23  * questions.

    24  */

    25 

    26 #include "jni.h"

    27 #include "jni_util.h"

    28 #include "jvm.h"

    29 #include "jdk_internal_jline_WindowsTerminal.h"

    30 

    31 #include <stdlib.h>

    32 #include <Wincon.h>

    33 #include <Winuser.h>

    34 

    35 static jclass recordClass;

    36 static jmethodID recordConstructor;

    37 

    38 JNIEXPORT void JNICALL Java_jdk_internal_jline_WindowsTerminal_initIDs

    39   (JNIEnv *env, jclass) {

    40     jclass cls = env->FindClass("jdk/internal/jline/WindowsTerminal$KEY_EVENT_RECORD");

    41     CHECK_NULL(cls);

    42     recordClass = (jclass) env->NewGlobalRef(cls);

    43     CHECK_NULL(recordClass);

    44     recordConstructor = env->GetMethodID(cls, "<init>", "(ZCIII)V");

    45     CHECK_NULL(recordConstructor);

    46 }

    47 

    48 JNIEXPORT jint JNICALL Java_jdk_internal_jline_WindowsTerminal_getConsoleMode

    49   (JNIEnv *, jobject) {

    50     HANDLE hStdIn;

    51     if ((hStdIn = GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) {

    52         return -1;

    53     }

    54     DWORD fdwMode;

    55     if (! GetConsoleMode(hStdIn, &fdwMode)) {

    56         return -1;

    57     }

    58     return fdwMode;

    59 }

    60 

    61 JNIEXPORT void JNICALL Java_jdk_internal_jline_WindowsTerminal_setConsoleMode

    62   (JNIEnv *, jobject, jint mode) {

    63     HANDLE hStdIn;

    64     if ((hStdIn = GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) {

    65         return ;

    66     }

    67     DWORD fdwMode = mode;

    68     SetConsoleMode(hStdIn, fdwMode);

    69 }

    70 

    71 JNIEXPORT jobject JNICALL Java_jdk_internal_jline_WindowsTerminal_readKeyEvent

    72   (JNIEnv *env, jobject) {

    73     HANDLE hStdIn;

    74     if ((hStdIn = GetStdHandle(STD_INPUT_HANDLE)) == INVALID_HANDLE_VALUE) {

    75         return NULL;

    76     }

    77     INPUT_RECORD record;

    78     DWORD n;

    79     while (TRUE) {

    80         if (ReadConsoleInputW(hStdIn, &record, 1, &n) == 0) {

    81             return NULL;

    82         }

    83         if (record.EventType == KEY_EVENT) {

    84             jclass clazz = env->FindClass("jdk/internal/jline/WindowsTerminal$KEY_EVENT_RECORD");

    85             jmethodID constr = env->GetMethodID(clazz, "<init>", "(ZCIII)V");

    86             return env->NewObject(recordClass,

    87                                   recordConstructor,

    88                                   record.Event.KeyEvent.bKeyDown,

    89                                   record.Event.KeyEvent.uChar.UnicodeChar,

    90                                   record.Event.KeyEvent.dwControlKeyState,

    91                                   record.Event.KeyEvent.wVirtualKeyCode,

    92                                   record.Event.KeyEvent.wRepeatCount);

    93         }

    94         continue;

    95     }

    96 }

    97 

    98 JNIEXPORT jint JNICALL Java_jdk_internal_jline_WindowsTerminal_getConsoleOutputCodepage

    99   (JNIEnv *, jobject) {

   100     return GetConsoleOutputCP();

   101 }

   102 

   103 JNIEXPORT jint JNICALL Java_jdk_internal_jline_WindowsTerminal_getWindowsTerminalWidth

   104   (JNIEnv *, jobject) {

   105     HANDLE hStdOut;

   106     if ((hStdOut = GetStdHandle(STD_OUTPUT_HANDLE)) == INVALID_HANDLE_VALUE) {

   107         return -1;

   108     }

   109     CONSOLE_SCREEN_BUFFER_INFO info;

   110     if (! GetConsoleScreenBufferInfo(hStdOut, &info)) {

   111         return -1;

   112     }

   113     return info.srWindow.Right - info.srWindow.Left;

   114 }

   115 

   116 JNIEXPORT jint JNICALL Java_jdk_internal_jline_WindowsTerminal_getWindowsTerminalHeight

   117   (JNIEnv *, jobject) {

   118     HANDLE hStdOut;

   119     if ((hStdOut = GetStdHandle(STD_OUTPUT_HANDLE)) == INVALID_HANDLE_VALUE) {

   120         return -1;

   121     }

   122     CONSOLE_SCREEN_BUFFER_INFO info;

   123     if (! GetConsoleScreenBufferInfo(hStdOut, &info)) {

   124         return -1;

   125     }

   126     return info.srWindow.Bottom - info.srWindow.Top + 1;

   127 }