android_cliprdr.c

 
#include <freerdp/config.h>
 
#include <jni.h>
 
#include <winpr/crt.h>
#include <winpr/stream.h>
 
#include <freerdp/client/channels.h>
#include <freerdp/client/cliprdr.h>
 
#include "android_cliprdr.h"
#include "android_jni_utils.h"
#include "android_jni_callback.h"
 
static void android_cliprdr_free_formats(CLIPRDR_FORMAT* formats, UINT32 numFormats)
{
  if (!formats)
    return;
 
  for (UINT32 index = 0; index < numFormats; index++)
    free(formats[index].formatName);
 
  free(formats);
}
 
UINT android_cliprdr_send_client_format_list(CliprdrClientContext* cliprdr)
{
  UINT rc = ERROR_INTERNAL_ERROR;
  UINT32 formatId;
  UINT32 numFormats;
  UINT32* pFormatIds;
  const char* formatName;
  CLIPRDR_FORMAT* formats;
  CLIPRDR_FORMAT_LIST formatList = WINPR_C_ARRAY_INIT;
 
  if (!cliprdr)
    return ERROR_INVALID_PARAMETER;
 
  androidContext* afc = (androidContext*)cliprdr->custom;
 
  if (!afc || !afc->cliprdr)
    return ERROR_INVALID_PARAMETER;
 
  pFormatIds = nullptr;
  numFormats = ClipboardGetFormatIds(afc->clipboard, &pFormatIds);
  formats = (CLIPRDR_FORMAT*)calloc(numFormats, sizeof(CLIPRDR_FORMAT));
 
  if (!formats)
    goto fail;
 
  for (UINT32 index = 0; index < numFormats; index++)
  {
    formatId = pFormatIds[index];
    formatName = ClipboardGetFormatName(afc->clipboard, formatId);
    formats[index].formatId = formatId;
    formats[index].formatName = nullptr;
 
    if ((formatId > CF_MAX) && formatName)
    {
      formats[index].formatName = _strdup(formatName);
 
      if (!formats[index].formatName)
        goto fail;
    }
  }
 
  formatList.common.msgFlags = 0;
  formatList.numFormats = numFormats;
  formatList.formats = formats;
  formatList.common.msgType = CB_FORMAT_LIST;
 
  if (!afc->cliprdr->ClientFormatList)
    goto fail;
 
  rc = afc->cliprdr->ClientFormatList(afc->cliprdr, &formatList);
fail:
  free(pFormatIds);
  android_cliprdr_free_formats(formats, numFormats);
  return rc;
}
 
static UINT android_cliprdr_send_client_format_data_request(CliprdrClientContext* cliprdr,
                                                            UINT32 formatId)
{
  UINT rc = ERROR_INVALID_PARAMETER;
  CLIPRDR_FORMAT_DATA_REQUEST formatDataRequest = WINPR_C_ARRAY_INIT;
  androidContext* afc;
 
  if (!cliprdr)
    goto fail;
 
  afc = (androidContext*)cliprdr->custom;
 
  if (!afc || !afc->clipboardRequestEvent || !cliprdr->ClientFormatDataRequest)
    goto fail;
 
  formatDataRequest.common.msgType = CB_FORMAT_DATA_REQUEST;
  formatDataRequest.common.msgFlags = 0;
  formatDataRequest.requestedFormatId = formatId;
  afc->requestedFormatId = formatId;
  (void)ResetEvent(afc->clipboardRequestEvent);
  rc = cliprdr->ClientFormatDataRequest(cliprdr, &formatDataRequest);
fail:
  return rc;
}
 
static UINT android_cliprdr_send_client_capabilities(CliprdrClientContext* cliprdr)
{
  CLIPRDR_CAPABILITIES capabilities;
  CLIPRDR_GENERAL_CAPABILITY_SET generalCapabilitySet;
 
  if (!cliprdr || !cliprdr->ClientCapabilities)
    return ERROR_INVALID_PARAMETER;
 
  capabilities.cCapabilitiesSets = 1;
  capabilities.capabilitySets = (CLIPRDR_CAPABILITY_SET*)&(generalCapabilitySet);
  generalCapabilitySet.capabilitySetType = CB_CAPSTYPE_GENERAL;
  generalCapabilitySet.capabilitySetLength = 12;
  generalCapabilitySet.version = CB_CAPS_VERSION_2;
  generalCapabilitySet.generalFlags = CB_USE_LONG_FORMAT_NAMES;
  return cliprdr->ClientCapabilities(cliprdr, &capabilities);
}
 
static UINT android_cliprdr_monitor_ready(CliprdrClientContext* cliprdr,
                                          const CLIPRDR_MONITOR_READY* monitorReady)
{
  UINT rc;
  androidContext* afc;
 
  if (!cliprdr || !monitorReady)
    return ERROR_INVALID_PARAMETER;
 
  afc = (androidContext*)cliprdr->custom;
 
  if (!afc)
    return ERROR_INVALID_PARAMETER;
 
  if ((rc = android_cliprdr_send_client_capabilities(cliprdr)) != CHANNEL_RC_OK)
    return rc;
 
  if ((rc = android_cliprdr_send_client_format_list(cliprdr)) != CHANNEL_RC_OK)
    return rc;
 
  afc->clipboardSync = TRUE;
  return CHANNEL_RC_OK;
}
 
static UINT android_cliprdr_server_capabilities(CliprdrClientContext* cliprdr,
                                                const CLIPRDR_CAPABILITIES* capabilities)
{
  CLIPRDR_CAPABILITY_SET* capabilitySet;
  androidContext* afc;
 
  if (!cliprdr || !capabilities)
    return ERROR_INVALID_PARAMETER;
 
  afc = (androidContext*)cliprdr->custom;
 
  if (!afc)
    return ERROR_INVALID_PARAMETER;
 
  for (UINT32 index = 0; index < capabilities->cCapabilitiesSets; index++)
  {
    capabilitySet = &(capabilities->capabilitySets[index]);
 
    if ((capabilitySet->capabilitySetType == CB_CAPSTYPE_GENERAL) &&
        (capabilitySet->capabilitySetLength >= CB_CAPSTYPE_GENERAL_LEN))
    {
      CLIPRDR_GENERAL_CAPABILITY_SET* generalCapabilitySet =
          (CLIPRDR_GENERAL_CAPABILITY_SET*)capabilitySet;
      afc->clipboardCapabilities = generalCapabilitySet->generalFlags;
      break;
    }
  }
 
  return CHANNEL_RC_OK;
}
 
static UINT android_cliprdr_send_client_format_list_response(CliprdrClientContext* cliprdr,
                                                             BOOL status)
{
  CLIPRDR_FORMAT_LIST_RESPONSE formatListResponse = WINPR_C_ARRAY_INIT;
 
  formatListResponse.common.msgType = CB_FORMAT_LIST_RESPONSE;
  formatListResponse.common.msgFlags = status ? CB_RESPONSE_OK : CB_RESPONSE_FAIL;
  formatListResponse.common.dataLen = 0;
 
  if (!cliprdr || !cliprdr->ClientFormatListResponse)
    return ERROR_INVALID_PARAMETER;
 
  return cliprdr->ClientFormatListResponse(cliprdr, &formatListResponse);
}
 
static UINT android_cliprdr_server_format_list(CliprdrClientContext* cliprdr,
                                               const CLIPRDR_FORMAT_LIST* formatList)
{
  UINT rc;
  CLIPRDR_FORMAT* format;
  androidContext* afc;
 
  if (!cliprdr || !formatList)
    return ERROR_INVALID_PARAMETER;
 
  afc = (androidContext*)cliprdr->custom;
 
  if (!afc)
    return ERROR_INVALID_PARAMETER;
 
  android_cliprdr_free_formats(afc->serverFormats, afc->numServerFormats);
  afc->serverFormats = nullptr;
  afc->numServerFormats = 0;
 
  if (formatList->numFormats < 1)
    return android_cliprdr_send_client_format_list_response(cliprdr, TRUE);
 
  afc->numServerFormats = formatList->numFormats;
  afc->serverFormats = (CLIPRDR_FORMAT*)calloc(afc->numServerFormats, sizeof(CLIPRDR_FORMAT));
 
  if (!afc->serverFormats)
    return CHANNEL_RC_NO_MEMORY;
 
  for (UINT32 index = 0; index < afc->numServerFormats; index++)
  {
    afc->serverFormats[index].formatId = formatList->formats[index].formatId;
    afc->serverFormats[index].formatName = nullptr;
 
    if (formatList->formats[index].formatName)
    {
      afc->serverFormats[index].formatName = _strdup(formatList->formats[index].formatName);
 
      if (!afc->serverFormats[index].formatName)
        return CHANNEL_RC_NO_MEMORY;
    }
  }
 
  if ((rc = android_cliprdr_send_client_format_list_response(cliprdr, TRUE)) != CHANNEL_RC_OK)
    return rc;
 
  /* Text formats take priority over image formats. Request the best available text format
   * first; if none is found, fall back to image. */
  for (UINT32 index = 0; index < afc->numServerFormats; index++)
  {
    format = &(afc->serverFormats[index]);
 
    if (format->formatId == CF_UNICODETEXT)
    {
      if ((rc = android_cliprdr_send_client_format_data_request(cliprdr, CF_UNICODETEXT)) !=
          CHANNEL_RC_OK)
        return rc;
 
      return CHANNEL_RC_OK;
    }
    else if (format->formatId == CF_TEXT)
    {
      if ((rc = android_cliprdr_send_client_format_data_request(cliprdr, CF_TEXT)) !=
          CHANNEL_RC_OK)
        return rc;
 
      return CHANNEL_RC_OK;
    }
  }
 
  /* No text format found — request the first available image format. */
  for (UINT32 index = 0; index < afc->numServerFormats; index++)
  {
    format = &(afc->serverFormats[index]);
 
    if (format->formatId == CF_DIB || format->formatId == CF_DIBV5)
    {
      if ((rc = android_cliprdr_send_client_format_data_request(cliprdr, format->formatId)) !=
          CHANNEL_RC_OK)
        return rc;
 
      break;
    }
  }
 
  return CHANNEL_RC_OK;
}
 
static UINT
android_cliprdr_server_format_list_response(CliprdrClientContext* cliprdr,
                                            const CLIPRDR_FORMAT_LIST_RESPONSE* formatListResponse)
{
  if (!cliprdr || !formatListResponse)
    return ERROR_INVALID_PARAMETER;
 
  return CHANNEL_RC_OK;
}
 
static UINT
android_cliprdr_server_lock_clipboard_data(CliprdrClientContext* cliprdr,
                                           const CLIPRDR_LOCK_CLIPBOARD_DATA* lockClipboardData)
{
  if (!cliprdr || !lockClipboardData)
    return ERROR_INVALID_PARAMETER;
 
  return CHANNEL_RC_OK;
}
 
static UINT android_cliprdr_server_unlock_clipboard_data(
    CliprdrClientContext* cliprdr, const CLIPRDR_UNLOCK_CLIPBOARD_DATA* unlockClipboardData)
{
  if (!cliprdr || !unlockClipboardData)
    return ERROR_INVALID_PARAMETER;
 
  return CHANNEL_RC_OK;
}
 
static UINT
android_cliprdr_server_format_data_request(CliprdrClientContext* cliprdr,
                                           const CLIPRDR_FORMAT_DATA_REQUEST* formatDataRequest)
{
  UINT rc;
  BYTE* data;
  UINT32 size;
  UINT32 formatId;
  CLIPRDR_FORMAT_DATA_RESPONSE response = WINPR_C_ARRAY_INIT;
  androidContext* afc;
 
  if (!cliprdr || !formatDataRequest || !cliprdr->ClientFormatDataResponse)
    return ERROR_INVALID_PARAMETER;
 
  afc = (androidContext*)cliprdr->custom;
 
  if (!afc)
    return ERROR_INVALID_PARAMETER;
 
  formatId = formatDataRequest->requestedFormatId;
  data = (BYTE*)ClipboardGetData(afc->clipboard, formatId, &size);
  response.common.msgFlags = CB_RESPONSE_OK;
  response.common.dataLen = size;
  response.requestedFormatData = data;
 
  if (!data)
  {
    response.common.msgFlags = CB_RESPONSE_FAIL;
    response.common.dataLen = 0;
    response.requestedFormatData = nullptr;
  }
 
  rc = cliprdr->ClientFormatDataResponse(cliprdr, &response);
  free(data);
  return rc;
}
 
static UINT
android_cliprdr_server_format_data_response(CliprdrClientContext* cliprdr,
                                            const CLIPRDR_FORMAT_DATA_RESPONSE* formatDataResponse)
{
  CLIPRDR_FORMAT* format = nullptr;
 
  if (!cliprdr || !formatDataResponse)
    return ERROR_INVALID_PARAMETER;
 
  androidContext* afc = (androidContext*)cliprdr->custom;
 
  if (!afc)
    return ERROR_INVALID_PARAMETER;
 
  freerdp* instance = ((rdpContext*)afc)->instance;
 
  if (!instance)
    return ERROR_INVALID_PARAMETER;
 
  for (UINT32 index = 0; index < afc->numServerFormats; index++)
  {
    if (afc->requestedFormatId == afc->serverFormats[index].formatId)
      format = &(afc->serverFormats[index]);
  }
 
  if (!format)
  {
    (void)SetEvent(afc->clipboardRequestEvent);
    return ERROR_INTERNAL_ERROR;
  }
 
  UINT32 formatId = format->formatId;
  if (format->formatName)
    formatId = ClipboardRegisterFormat(afc->clipboard, format->formatName);
 
  uint32_t size = formatDataResponse->common.dataLen;
 
  if (!ClipboardSetData(afc->clipboard, formatId, formatDataResponse->requestedFormatData, size))
    return ERROR_INTERNAL_ERROR;
 
  (void)SetEvent(afc->clipboardRequestEvent);
 
  switch (formatId)
  {
    case CF_TEXT:
    case CF_UNICODETEXT:
    {
      JNIEnv* env = nullptr;
      UINT32 plainFormatId = ClipboardRegisterFormat(afc->clipboard, "text/plain");
      char* data = (char*)ClipboardGetData(afc->clipboard, plainFormatId, &size);
      if (!data)
        break;
      jboolean attached = jni_attach_thread(&env);
      size = strnlen(data, size);
      jstring jdata = jniNewStringUTF(env, data, size);
      freerdp_callback("OnRemoteClipboardChanged", "(JLjava/lang/String;)V", (jlong)instance,
                       jdata);
      (*env)->DeleteLocalRef(env, jdata);
      free(data);
 
      if (attached == JNI_TRUE)
        jni_detach_thread();
    }
    break;
    case CF_DIB:
    case CF_DIBV5:
    {
      UINT32 pngFormatId = ClipboardRegisterFormat(afc->clipboard, "image/png");
      BYTE* pngData = (BYTE*)ClipboardGetData(afc->clipboard, pngFormatId, &size);
 
      if (pngData)
      {
        JNIEnv* env = nullptr;
        jboolean attached = jni_attach_thread(&env);
        jbyteArray jpngData = (*env)->NewByteArray(env, (jsize)size);
 
        if (jpngData)
        {
          (*env)->SetByteArrayRegion(env, jpngData, 0, (jsize)size,
                                     (const jbyte*)pngData);
          freerdp_callback("OnRemoteClipboardImageChanged", "(J[B)V", (jlong)instance,
                           jpngData);
          (*env)->DeleteLocalRef(env, jpngData);
        }
 
        free(pngData);
 
        if (attached == JNI_TRUE)
          jni_detach_thread();
      }
    }
    break;
    default:
      break;
  }
 
  return CHANNEL_RC_OK;
}
 
static UINT android_cliprdr_server_file_contents_request(
    CliprdrClientContext* cliprdr, const CLIPRDR_FILE_CONTENTS_REQUEST* fileContentsRequest)
{
  if (!cliprdr || !fileContentsRequest)
    return ERROR_INVALID_PARAMETER;
 
  return CHANNEL_RC_OK;
}
 
static UINT android_cliprdr_server_file_contents_response(
    CliprdrClientContext* cliprdr, const CLIPRDR_FILE_CONTENTS_RESPONSE* fileContentsResponse)
{
  if (!cliprdr || !fileContentsResponse)
    return ERROR_INVALID_PARAMETER;
 
  return CHANNEL_RC_OK;
}
 
BOOL android_cliprdr_init(androidContext* afc, CliprdrClientContext* cliprdr)
{
  wClipboard* clipboard;
  HANDLE hevent;
 
  if (!afc || !cliprdr)
    return FALSE;
 
  if (!(hevent = CreateEvent(nullptr, TRUE, FALSE, nullptr)))
    return FALSE;
 
  if (!(clipboard = ClipboardCreate()))
  {
    (void)CloseHandle(hevent);
    return FALSE;
  }
 
  afc->cliprdr = cliprdr;
  afc->clipboard = clipboard;
  afc->clipboardRequestEvent = hevent;
  cliprdr->custom = (void*)afc;
  cliprdr->MonitorReady = android_cliprdr_monitor_ready;
  cliprdr->ServerCapabilities = android_cliprdr_server_capabilities;
  cliprdr->ServerFormatList = android_cliprdr_server_format_list;
  cliprdr->ServerFormatListResponse = android_cliprdr_server_format_list_response;
  cliprdr->ServerLockClipboardData = android_cliprdr_server_lock_clipboard_data;
  cliprdr->ServerUnlockClipboardData = android_cliprdr_server_unlock_clipboard_data;
  cliprdr->ServerFormatDataRequest = android_cliprdr_server_format_data_request;
  cliprdr->ServerFormatDataResponse = android_cliprdr_server_format_data_response;
  cliprdr->ServerFileContentsRequest = android_cliprdr_server_file_contents_request;
  cliprdr->ServerFileContentsResponse = android_cliprdr_server_file_contents_response;
  return TRUE;
}
 
BOOL android_cliprdr_uninit(androidContext* afc, CliprdrClientContext* cliprdr)
{
  if (!afc || !cliprdr)
    return FALSE;
 
  cliprdr->custom = nullptr;
  afc->cliprdr = nullptr;
  ClipboardDestroy(afc->clipboard);
  (void)CloseHandle(afc->clipboardRequestEvent);
  return TRUE;
}