gdkim.c

gtk是linux一款强大的夸平台的图形化开发工具

			      XNPreeditAttributes,
			      preedit_attr,
			      XNStatusAttributes,
			      status_attr,
			      NULL);
  else if (preedit_attr != NULL)
    private->xic = XCreateIC (xim_im,
			      XNInputStyle,
			      attr->style,
			      XNClientWindow,
			      GDK_WINDOW_XWINDOW(attr->client_window),
			      XNPreeditAttributes,
			      preedit_attr,
			      NULL);
  else if (status_attr != NULL)
    private->xic = XCreateIC (xim_im,
			      XNInputStyle,
			      attr->style,
			      XNClientWindow,
			      GDK_WINDOW_XWINDOW(attr->client_window),
			      XNStatusAttributes,
			      status_attr,
			      NULL);
  else
    private->xic = XCreateIC (xim_im,
			      XNInputStyle,
			      attr->style,
			      XNClientWindow,
			      GDK_WINDOW_XWINDOW(attr->client_window),
			      NULL);

  if (preedit_attr)
    XFree (preedit_attr);
  if (status_attr)
    XFree (status_attr);

  if (private->xic == NULL)
    g_warning ("can not create input context with specified input style.");
  else
    gdk_ic_real_set_attr (ic, private->attr, private->mask & ~mask);
}

GdkIC *
gdk_ic_new (GdkICAttr *attr, GdkICAttributesType mask)
{
  GdkICPrivate *private;
  gboolean error = 0;
  GdkICAttributesType invalid_mask;
  GdkICAttr *pattr;

  g_return_val_if_fail (attr != NULL, NULL);
  g_return_val_if_fail ((mask & GDK_IC_ALL_REQ) == GDK_IC_ALL_REQ, NULL);

  switch (attr->style & GDK_IM_PREEDIT_MASK)
    {
    case 0:
      g_warning ("preedit style is not specified.\n");
      error = 1;
      break;

    case GDK_IM_PREEDIT_AREA:
      if ((mask & GDK_IC_PREEDIT_AREA_REQ) != GDK_IC_PREEDIT_AREA_REQ)
	error = 4;
      break;

    case GDK_IM_PREEDIT_POSITION:
      if ((mask & GDK_IC_PREEDIT_POSITION_REQ) != GDK_IC_PREEDIT_POSITION_REQ)
	error = 4;
      break;
    }

  switch (attr->style & GDK_IM_STATUS_MASK)
    {
    case 0:
      g_warning ("status style is not specified.\n");
      error = 2;
      break;

    case GDK_IM_STATUS_AREA:
      if ((mask & GDK_IC_STATUS_AREA_REQ) != GDK_IC_STATUS_AREA_REQ)
	error = 8;
      break;
    }

  if (error)
    {
      if (error & 12)
	g_warning ("IC attribute is not enough to required input style.\n");
      return NULL;
    }

  if (attr->client_window == NULL ||
      ((GdkWindowPrivate *)attr->client_window)->destroyed)
    {
      g_warning ("Client_window is null or already destroyed.\n");
      return NULL;
    }

  private = g_new0 (GdkICPrivate, 1);
  private->attr = pattr = gdk_ic_attr_new ();

  gdk_window_ref (attr->client_window);
  pattr->client_window = attr->client_window;
  pattr->style = attr->style;
  private->mask = GDK_IC_STYLE | GDK_IC_CLIENT_WINDOW;
  
  /* XIC is still not created, so following call only copies attributes */
  invalid_mask = gdk_ic_set_attr ((GdkIC *)private, attr, mask & ~GDK_IC_ALL_REQ);

  switch (attr->style & GDK_IM_PREEDIT_MASK)
    {
    case GDK_IM_PREEDIT_AREA:
      if (invalid_mask & GDK_IC_PREEDIT_AREA_REQ)
	error = TRUE;
      break;

    case GDK_IM_PREEDIT_POSITION:
      if (invalid_mask & GDK_IC_PREEDIT_POSITION_REQ)
	error = TRUE;
      break;
    }

  switch (attr->style & GDK_IM_STATUS_MASK)
    {
    case GDK_IM_STATUS_AREA:
      if (invalid_mask & GDK_IC_STATUS_AREA_REQ)
	error = TRUE;
      break;
    }

  if (error == TRUE)
    {
      g_warning ("Essential attributes for required style are invalid.\n");
      gdk_ic_destroy ((GdkIC *)private);
      return NULL;
    }

  if (gdk_im_ready ())
    gdk_ic_real_new ((GdkIC *)private);

  xim_ic_list = g_list_append (xim_ic_list, private);
  
  return (GdkIC *)private;
}

void 
gdk_ic_destroy (GdkIC *ic)
{
  GdkICPrivate *private;
  
  g_return_if_fail (ic != NULL);
  
  private = (GdkICPrivate *) ic;
  
  if (gdk_xim_ic == private)
    gdk_im_end ();
  
  GDK_NOTE (XIM, g_message ("ic_destroy %p\n", private->xic));
  if (private->xic != NULL)
    XDestroyIC (private->xic);

  if (private->mask & GDK_IC_CLIENT_WINDOW)
    gdk_window_unref (private->attr->client_window);
  if (private->mask & GDK_IC_FOCUS_WINDOW)
    gdk_window_unref (private->attr->focus_window);

  if (private->mask & GDK_IC_PREEDIT_FONTSET)
    gdk_font_unref (private->attr->preedit_fontset);
  if (private->mask & GDK_IC_PREEDIT_PIXMAP)
    gdk_pixmap_unref (private->attr->preedit_pixmap);
  if (private->mask & GDK_IC_PREEDIT_COLORMAP)
    gdk_colormap_unref (private->attr->preedit_colormap);

  if (private->mask & GDK_IC_STATUS_FONTSET)
    gdk_font_unref (private->attr->status_fontset);
  if (private->mask & GDK_IC_STATUS_PIXMAP)
    gdk_pixmap_unref (private->attr->status_pixmap);
  if (private->mask & GDK_IC_STATUS_COLORMAP)
    gdk_colormap_unref (private->attr->status_colormap);

  xim_ic_list = g_list_remove (xim_ic_list, private);
  gdk_ic_attr_destroy (private->attr);
  g_free (private);
}

GdkIMStyle
gdk_ic_get_style (GdkIC *ic)
{
  GdkICPrivate *private;
  
  g_return_val_if_fail (ic != NULL, 0);
  
  private = (GdkICPrivate *) ic;
  
  return private->attr->style;
}

/*
 * for keeping binary compatibility if member of ic attributes is added.
 */
GdkICAttr *
gdk_ic_attr_new (void)
{
  return g_new0 (GdkICAttr, 1);
}

void
gdk_ic_attr_destroy (GdkICAttr *attr)
{
  g_return_if_fail (attr != NULL);

  g_free (attr);
}

static GdkICAttributesType
gdk_ic_real_set_attr (GdkIC *ic,
    		      GdkICAttr *attr,
		      GdkICAttributesType mask)
{
  GdkICPrivate *private = (GdkICPrivate *)ic;
  XIC xic = private->xic;
  GdkICAttributesType error = 0;
  GdkImArg arg[2] = {{NULL, NULL}, {NULL, NULL}};

  if (mask & GDK_IC_FOCUS_WINDOW)
    {
      if (XSetICValues (xic, XNFocusWindow,
			GDK_WINDOW_XWINDOW(attr->focus_window), NULL) != NULL)
	error |= GDK_IC_FOCUS_WINDOW;
    }

  if (mask & GDK_IC_SPOT_LOCATION)
    {
      XPoint point;

      point.x = attr->spot_location.x;
      point.y = attr->spot_location.y;

      arg->name = XNSpotLocation;
      arg->value = (gpointer) &point;

      if (XSetICValues (xic, XNPreeditAttributes, arg, NULL))
	error |= GDK_IC_SPOT_LOCATION;
    }

  if (mask & GDK_IC_LINE_SPACING)
    {
      arg->name = XNLineSpace;
      arg->value = GINT_TO_POINTER( attr->line_spacing );

      if (XSetICValues (xic, XNPreeditAttributes, arg, NULL))
	error |= GDK_IC_LINE_SPACING;
    }

  if (mask & GDK_IC_CURSOR)
    {
      GdkCursorPrivate *cursor = (GdkCursorPrivate *) attr->cursor;

      if (XSetICValues (xic, XNCursor, cursor->xcursor, NULL))
	error |= GDK_IC_CURSOR;
    }

  if (mask & GDK_IC_PREEDIT_FONTSET)
    {
      arg->name = XNFontSet;
      arg->value = (gpointer) GDK_FONT_XFONT(attr->preedit_fontset);

      if (XSetICValues (xic, XNPreeditAttributes, arg, NULL))
	error |= GDK_IC_PREEDIT_FONTSET;
    }

  if (mask & GDK_IC_PREEDIT_AREA)
    {
      XRectangle rect;

      rect.x = attr->preedit_area.x;
      rect.y = attr->preedit_area.y;
      rect.width = attr->preedit_area.width;
      rect.height = attr->preedit_area.height;

      arg->name = XNArea;
      arg->value = (gpointer) ▭

      if (XSetICValues (xic, XNPreeditAttributes, arg, NULL))
	error |= GDK_IC_PREEDIT_AREA;
    }

  if (mask & GDK_IC_PREEDIT_AREA_NEEDED)
    {
      XRectangle rect;

      rect.x = attr->preedit_area_needed.x;
      rect.y = attr->preedit_area_needed.y;
      rect.width = attr->preedit_area_needed.width;
      rect.height = attr->preedit_area_needed.height;

      arg->name = XNArea;
      arg->value = (gpointer) ▭

      if (XSetICValues (xic, XNPreeditAttributes, arg, NULL))
	error |= GDK_IC_PREEDIT_AREA_NEEDED;
      else
	private->mask &= ~GDK_IC_PREEDIT_AREA_NEEDED;
    }

  if (mask & GDK_IC_PREEDIT_FOREGROUND)
    {
      arg->name = XNForeground;
      arg->value = (gpointer) attr->preedit_foreground.pixel;

      if (XSetICValues (xic, XNPreeditAttributes, arg, NULL))
	error |= GDK_IC_PREEDIT_FOREGROUND;
    }

  if (mask & GDK_IC_PREEDIT_BACKGROUND)
    {
      arg->name = XNBackground;
      arg->value = (gpointer) attr->preedit_background.pixel;

      if (XSetICValues (xic, XNPreeditAttributes, arg, NULL))
	error |= GDK_IC_PREEDIT_BACKGROUND;
    }

  if (mask & GDK_IC_PREEDIT_PIXMAP)
    {
      arg->name = XNBackgroundPixmap;
      arg->value = (gpointer) GDK_WINDOW_XWINDOW(attr->preedit_pixmap);

      if (XSetICValues (xic, XNPreeditAttributes, arg, NULL))
	error |= GDK_IC_PREEDIT_PIXMAP;
    }

  if (mask & GDK_IC_PREEDIT_COLORMAP)
    {
      arg->name = XNColormap;
      arg->value = (gpointer) GDK_COLORMAP_XCOLORMAP(attr->preedit_colormap);

      if (XSetICValues (xic, XNPreeditAttributes, arg, NULL))
	error |= GDK_IC_PREEDIT_COLORMAP;
    }


  if (mask & GDK_IC_STATUS_FONTSET)
    {
      arg->name = XNFontSet;
      arg->value = (gpointer) GDK_FONT_XFONT(attr->status_fontset);

      if (XSetICValues (xic, XNStatusAttributes, arg, NULL))
	error |= GDK_IC_STATUS_FONTSET;
    }

  if (mask & GDK_IC_STATUS_AREA)
    {
      XRectangle rect;

      rect.x = attr->status_area.x;
      rect.y = attr->status_area.y;
      rect.width = attr->status_area.width;
      rect.height = attr->status_area.height;

      arg->name = XNArea;
      arg->value = (gpointer) ▭

      if (XSetICValues (xic, XNStatusAttributes, arg, NULL))
	error |= GDK_IC_STATUS_AREA;
    }

  if (mask & GDK_IC_STATUS_AREA_NEEDED)
    {
      XRectangle rect;

      rect.x = attr->status_area_needed.x;
      rect.y = attr->status_area_needed.y;
      rect.width = attr->status_area_needed.width;
      rect.height = attr->status_area_needed.height;

      arg->name = XNArea;
      arg->value = (gpointer) ▭

      if (XSetICValues (xic, XNStatusAttributes, arg, NULL))
	error |= GDK_IC_STATUS_AREA_NEEDED;
      else
	private->mask &= ~GDK_IC_STATUS_AREA_NEEDED;
    }

  if (mask & GDK_IC_STATUS_FOREGROUND)
    {
      arg->name = XNForeground;
      arg->value = (gpointer) attr->status_foreground.pixel;

      if (XSetICValues (xic, XNStatusAttributes, arg, NULL))
	error |= GDK_IC_STATUS_FOREGROUND;
    }

  if (mask & GDK_IC_STATUS_BACKGROUND)
    {
      arg->name = XNBackground;
      arg->value = (gpointer) attr->status_background.pixel;

      if (XSetICValues (xic, XNStatusAttributes, arg, NULL))
	error |= GDK_IC_STATUS_BACKGROUND;
    }

  if (mask & GDK_IC_STATUS_PIXMAP)
    {
      arg->name = XNBackgroundPixmap;
      arg->value = (gpointer) GDK_WINDOW_XWINDOW(attr->status_pixmap);

      if (XSetICValues (xic, XNStatusAttributes, arg, NULL))
	error |= GDK_IC_STATUS_PIXMAP;
    }

  if (mask & GDK_IC_STATUS_COLORMAP)
    {
      arg->name = XNColormap;
      arg->value = (gpointer) GDK_COLORMAP_XCOLORMAP(attr->status_colormap);

      if (XSetICValues (xic, XNStatusAttributes, arg, NULL))
	error |= GDK_IC_STATUS_COLORMAP;
    }

  return error;
}

GdkICAttributesType
gdk_ic_set_attr (GdkIC *ic,
    		 GdkICAttr *attr,
		 GdkICAttributesType mask)
{
  GdkICPrivate *private;
  GdkICAttr *pattr;
  GdkICAttributesType error = 0;
  GdkICAttributesType newattr = 0;

  g_return_val_if_fail (ic != NULL, 0);
  g_return_val_if_fail (attr != NULL, 0);

  private = (GdkICPrivate *) ic;
  pattr = private->attr;

  /* Check and copy new attributes */

  if (mask & GDK_IC_STYLE)
    {
      g_warning ("input style can be specified only when creating new ic.\n");
      error |= GDK_IC_STYLE;
    }

  if (mask & GDK_IC_FILTER_EVENTS)
    {
      g_warning ("filter events is read only attributes.\n");
      error |= GDK_IC_FILTER_EVENTS;
    }

  if (mask & GDK_IC_CLIENT_WINDOW)
    {
      g_warning ("client window can be specified only when creating new ic.\n");
      error |= GDK_IC_CLIENT_WINDOW;
    }

  if (mask & GDK_IC_FOCUS_WINDOW)
    {
      if (attr->focus_window == NULL)
	{
	  g_warning ("specified focus_window is invalid.\n");
	  error |= GDK_IC_FOCUS_WINDOW;
	}
      else if (pattr->focus_window != attr->focus_window)
	{
	  if (pattr->focus_window != NULL)
	    gdk_window_unref (pattr->focus_window);
	  if (attr->focus_window != NULL)
	    gdk_window_ref (attr->focus_window);
	  pattr->focus_window = attr->focus_window;
	  newattr |= GDK_IC_FOCUS_WINDOW;
	}
    }

  if (mask & GDK_IC_SPOT_LOCATION)
    {
      pattr->spot_location = attr->spot_location;
      newattr |= GDK_IC_SPOT_LOCATION;
    }

  if (mask & GDK_IC_LINE_SPACING)
    {
      pattr->line_spacing = attr->line_spacing;
      newattr |= GDK_IC_LINE_SPACING;
    }

  if (mask & GDK_IC_CURSOR)
    {
      pattr->cursor = attr->cursor;
      newattr |= GDK_IC_CURSOR;
    }

  if (mask & GDK_IC_PREEDIT_FONTSET)
    {
      if (attr->preedit_fontset == NULL ||
	  attr->preedit_fontset->type != GDK_FONT_FONTSET)
	{
	  g_warning ("gdk_font is NULL or not a fontset.\n");
	  error |= GDK_IC_PREEDIT_FONTSET;
	}
      else if (pattr->preedit_fontset != attr->preedit_fontset)
	{
	  if (pattr->preedit_fontset != NULL)
	    gdk_font_unref (pattr->preedit_fontset);
	  if (attr->preedit_fontset != NULL)
	    gdk_font_ref (attr->preedit_fontset);
	  pattr->preedit_fontset = attr->preedit_fontset;
	  newattr |= GDK_IC_PREEDIT_FONTSET;
	}
    }

  if (mask & GDK_IC_PREEDIT_AREA)
    {
      pattr->preedit_area = attr->preedit_area;
      newattr |= GDK_IC_PREEDIT_AREA;
    }

  if (mask & GDK_IC_PREEDIT_AREA_NEEDED)
    {
      if (attr->preedit_area_needed.width == 0 ||
	  attr->preedit_area_needed.height == 0)
	{
	  g_warning ("width and height of preedit_area_needed must be non 0.\n");
	  error |= GDK_IC_PREEDIT_AREA_NEEDED;
	}
      else
	{
	  pattr->preedit_area_needed = attr->preedit_area_needed;