fl_text_input_handler.h File Reference

#include <gtk/gtk.h>
#include "flutter/shell/platform/linux/fl_key_event.h"
#include "flutter/shell/platform/linux/fl_text_input_view_delegate.h"
#include "flutter/shell/platform/linux/public/flutter_linux/fl_binary_messenger.h"

Go to the source code of this file.

Functions
G_BEGIN_DECLS	G_DECLARE_FINAL_TYPE (FlTextInputHandler, fl_text_input_handler, FL, TEXT_INPUT_HANDLER, GObject)
FlTextInputHandler *	fl_text_input_handler_new (FlBinaryMessenger *messenger, GtkIMContext *im_context, FlTextInputViewDelegate *view_delegate)
gboolean	fl_text_input_handler_filter_keypress (FlTextInputHandler *handler, FlKeyEvent *event)

Function Documentation

fl_text_input_handler_filter_keypress()

gboolean fl_text_input_handler_filter_keypress	(	FlTextInputHandler *	handler,
		FlKeyEvent *	event
	)

fl_text_input_handler_filter_keypress @handler: an #FlTextInputHandler. @event: a #FlKeyEvent

Process a Gdk key event.

Returns: TRUE if the event was used.

Definition at line 476 of file fl_text_input_handler.cc.

                                                                  {
  g_return_val_if_fail(FL_IS_TEXT_INPUT_HANDLER(self), FALSE);
 
  if (self->client_id == kClientIdUnset) {
    return FALSE;
  }
 
  if (gtk_im_context_filter_keypress(
          self->im_context,
          reinterpret_cast<GdkEventKey*>(fl_key_event_get_origin(event)))) {
    return TRUE;
  }
 
  std::string text_before_change = self->text_model->GetText();
  flutter::TextRange selection_before_change = self->text_model->selection();
  std::string text = self->text_model->GetText();
 
  // Handle the enter/return key.
  gboolean do_action = FALSE;
  // Handle navigation keys.
  gboolean changed = FALSE;
  if (fl_key_event_get_is_press(event)) {
    switch (fl_key_event_get_keyval(event)) {
      case GDK_KEY_End:
      case GDK_KEY_KP_End:
        if (fl_key_event_get_state(event) & GDK_SHIFT_MASK) {
          changed = self->text_model->SelectToEnd();
        } else {
          changed = self->text_model->MoveCursorToEnd();
        }
        break;
      case GDK_KEY_Return:
      case GDK_KEY_KP_Enter:
      case GDK_KEY_ISO_Enter:
        if (self->input_type == FL_TEXT_INPUT_TYPE_MULTILINE &&
            strcmp(self->input_action, kNewlineInputAction) == 0) {
          self->text_model->AddCodePoint('\n');
          text = "\n";
          changed = TRUE;
        }
        do_action = TRUE;
        break;
      case GDK_KEY_Home:
      case GDK_KEY_KP_Home:
        if (fl_key_event_get_state(event) & GDK_SHIFT_MASK) {
          changed = self->text_model->SelectToBeginning();
        } else {
          changed = self->text_model->MoveCursorToBeginning();
        }
        break;
      case GDK_KEY_BackSpace:
      case GDK_KEY_Delete:
      case GDK_KEY_KP_Delete:
      case GDK_KEY_Left:
      case GDK_KEY_KP_Left:
      case GDK_KEY_Right:
      case GDK_KEY_KP_Right:
        // Already handled inside the framework in RenderEditable.
        break;
    }
  }
 
  if (changed) {
    if (self->enable_delta_model) {
      flutter::TextEditingDelta delta = flutter::TextEditingDelta(
          text_before_change, selection_before_change, text);
      update_editing_state_with_delta(self, &delta);
    } else {
      update_editing_state(self);
    }
  }
  if (do_action) {
    perform_action(self);
  }
 
  return changed;
}

References fl_key_event_get_is_press(), fl_key_event_get_keyval(), fl_key_event_get_origin(), fl_key_event_get_state(), FL_TEXT_INPUT_TYPE_MULTILINE, kClientIdUnset, kNewlineInputAction, perform_action(), TRUE, update_editing_state(), and update_editing_state_with_delta().

Referenced by fl_view_keyboard_delegate_iface_init(), and send_key_event().

fl_text_input_handler_new()

FlTextInputHandler* fl_text_input_handler_new	(	FlBinaryMessenger *	messenger,
		GtkIMContext *	im_context,
		FlTextInputViewDelegate *	view_delegate
	)

FlTextInputHandler:

#FlTextInputHandler is a handler that implements the shell side of SystemChannels.textInput from the Flutter services library. fl_text_input_handler_new: @messenger: an #FlBinaryMessenger. @im_context: (allow-none): a #GtkIMContext. @view_delegate: an #FlTextInputViewDelegate.

Creates a new handler that implements SystemChannels.textInput from the Flutter services library.

Returns: a new #FlTextInputHandler.

Definition at line 455 of file fl_text_input_handler.cc.

                                            {
  g_return_val_if_fail(FL_IS_BINARY_MESSENGER(messenger), nullptr);
  g_return_val_if_fail(GTK_IS_IM_CONTEXT(im_context), nullptr);
  g_return_val_if_fail(FL_IS_TEXT_INPUT_VIEW_DELEGATE(view_delegate), nullptr);
 
  FlTextInputHandler* self = FL_TEXT_INPUT_HANDLER(
      g_object_new(fl_text_input_handler_get_type(), nullptr));
 
  self->channel =
      fl_text_input_channel_new(messenger, &text_input_vtable, self);
 
  init_im_context(self, im_context);
 
  g_weak_ref_init(&self->view_delegate, view_delegate);
 
  return self;
}

References fl_text_input_channel_new(), init_im_context(), and text_input_vtable.

Referenced by init_keyboard(), and TEST().

G_DECLARE_FINAL_TYPE()

G_BEGIN_DECLS G_DECLARE_FINAL_TYPE	(	FlTextInputHandler	,
		fl_text_input_handler	,
		FL	,
		TEXT_INPUT_HANDLER	,
		GObject
	)