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/*
* Copyright (C) 2010, 2011 Igalia S.L.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include "KeyBindingTranslator.h"
#include "GtkVersioning.h"
#include <gdk/gdkkeysyms.h>
#include <wtf/HashMap.h>
namespace WebCore {
typedef HashMap<int, const char*> IntConstCharHashMap;
static void backspaceCallback(GtkWidget* widget, KeyBindingTranslator* translator)
{
g_signal_stop_emission_by_name(widget, "backspace");
translator->addPendingEditorCommand("DeleteBackward");
}
static void selectAllCallback(GtkWidget* widget, gboolean select, KeyBindingTranslator* translator)
{
g_signal_stop_emission_by_name(widget, "select-all");
translator->addPendingEditorCommand(select ? "SelectAll" : "Unselect");
}
static void cutClipboardCallback(GtkWidget* widget, KeyBindingTranslator* translator)
{
g_signal_stop_emission_by_name(widget, "cut-clipboard");
translator->addPendingEditorCommand("Cut");
}
static void copyClipboardCallback(GtkWidget* widget, KeyBindingTranslator* translator)
{
g_signal_stop_emission_by_name(widget, "copy-clipboard");
translator->addPendingEditorCommand("Copy");
}
static void pasteClipboardCallback(GtkWidget* widget, KeyBindingTranslator* translator)
{
g_signal_stop_emission_by_name(widget, "paste-clipboard");
translator->addPendingEditorCommand("Paste");
}
static void toggleOverwriteCallback(GtkWidget* widget, KeyBindingTranslator* translator)
{
g_signal_stop_emission_by_name(widget, "toggle-overwrite");
translator->addPendingEditorCommand("OverWrite");
}
// GTK+ will still send these signals to the web view. So we can safely stop signal
// emission without breaking accessibility.
static void popupMenuCallback(GtkWidget* widget, KeyBindingTranslator*)
{
g_signal_stop_emission_by_name(widget, "popup-menu");
}
static void showHelpCallback(GtkWidget* widget, KeyBindingTranslator*)
{
g_signal_stop_emission_by_name(widget, "show-help");
}
static const char* const gtkDeleteCommands[][2] = {
{ "DeleteBackward", "DeleteForward" }, // Characters
{ "DeleteWordBackward", "DeleteWordForward" }, // Word ends
{ "DeleteWordBackward", "DeleteWordForward" }, // Words
{ "DeleteToBeginningOfLine", "DeleteToEndOfLine" }, // Lines
{ "DeleteToBeginningOfLine", "DeleteToEndOfLine" }, // Line ends
{ "DeleteToBeginningOfParagraph", "DeleteToEndOfParagraph" }, // Paragraph ends
{ "DeleteToBeginningOfParagraph", "DeleteToEndOfParagraph" }, // Paragraphs
{ 0, 0 } // Whitespace (M-\ in Emacs)
};
static void deleteFromCursorCallback(GtkWidget* widget, GtkDeleteType deleteType, gint count, KeyBindingTranslator* translator)
{
g_signal_stop_emission_by_name(widget, "delete-from-cursor");
int direction = count > 0 ? 1 : 0;
// Ensuring that deleteType <= G_N_ELEMENTS here results in a compiler warning
// that the condition is always true.
if (deleteType == GTK_DELETE_WORDS) {
if (!direction) {
translator->addPendingEditorCommand("MoveWordForward");
translator->addPendingEditorCommand("MoveWordBackward");
} else {
translator->addPendingEditorCommand("MoveWordBackward");
translator->addPendingEditorCommand("MoveWordForward");
}
} else if (deleteType == GTK_DELETE_DISPLAY_LINES) {
if (!direction)
translator->addPendingEditorCommand("MoveToBeginningOfLine");
else
translator->addPendingEditorCommand("MoveToEndOfLine");
} else if (deleteType == GTK_DELETE_PARAGRAPHS) {
if (!direction)
translator->addPendingEditorCommand("MoveToBeginningOfParagraph");
else
translator->addPendingEditorCommand("MoveToEndOfParagraph");
}
const char* rawCommand = gtkDeleteCommands[deleteType][direction];
if (!rawCommand)
return;
for (int i = 0; i < abs(count); i++)
translator->addPendingEditorCommand(rawCommand);
}
static const char* const gtkMoveCommands[][4] = {
{ "MoveBackward", "MoveForward",
"MoveBackwardAndModifySelection", "MoveForwardAndModifySelection" }, // Forward/backward grapheme
{ "MoveLeft", "MoveRight",
"MoveBackwardAndModifySelection", "MoveForwardAndModifySelection" }, // Left/right grapheme
{ "MoveWordBackward", "MoveWordForward",
"MoveWordBackwardAndModifySelection", "MoveWordForwardAndModifySelection" }, // Forward/backward word
{ "MoveUp", "MoveDown",
"MoveUpAndModifySelection", "MoveDownAndModifySelection" }, // Up/down line
{ "MoveToBeginningOfLine", "MoveToEndOfLine",
"MoveToBeginningOfLineAndModifySelection", "MoveToEndOfLineAndModifySelection" }, // Up/down line ends
{ "MoveParagraphBackward", "MoveParagraphForward",
"MoveParagraphBackwardAndModifySelection", "MoveParagraphForwardAndModifySelection" }, // Up/down paragraphs
{ "MoveToBeginningOfParagraph", "MoveToEndOfParagraph",
"MoveToBeginningOfParagraphAndModifySelection", "MoveToEndOfParagraphAndModifySelection" }, // Up/down paragraph ends.
{ "MovePageUp", "MovePageDown",
"MovePageUpAndModifySelection", "MovePageDownAndModifySelection" }, // Up/down page
{ "MoveToBeginningOfDocument", "MoveToEndOfDocument",
"MoveToBeginningOfDocumentAndModifySelection", "MoveToEndOfDocumentAndModifySelection" }, // Begin/end of buffer
{ 0, 0,
0, 0 } // Horizontal page movement
};
static void moveCursorCallback(GtkWidget* widget, GtkMovementStep step, gint count, gboolean extendSelection, KeyBindingTranslator* translator)
{
g_signal_stop_emission_by_name(widget, "move-cursor");
int direction = count > 0 ? 1 : 0;
if (extendSelection)
direction += 2;
if (static_cast<unsigned>(step) >= G_N_ELEMENTS(gtkMoveCommands))
return;
const char* rawCommand = gtkMoveCommands[step][direction];
if (!rawCommand)
return;
for (int i = 0; i < abs(count); i++)
translator->addPendingEditorCommand(rawCommand);
}
KeyBindingTranslator::KeyBindingTranslator()
: m_nativeWidget(gtk_text_view_new())
{
g_signal_connect(m_nativeWidget.get(), "backspace", G_CALLBACK(backspaceCallback), this);
g_signal_connect(m_nativeWidget.get(), "cut-clipboard", G_CALLBACK(cutClipboardCallback), this);
g_signal_connect(m_nativeWidget.get(), "copy-clipboard", G_CALLBACK(copyClipboardCallback), this);
g_signal_connect(m_nativeWidget.get(), "paste-clipboard", G_CALLBACK(pasteClipboardCallback), this);
g_signal_connect(m_nativeWidget.get(), "select-all", G_CALLBACK(selectAllCallback), this);
g_signal_connect(m_nativeWidget.get(), "move-cursor", G_CALLBACK(moveCursorCallback), this);
g_signal_connect(m_nativeWidget.get(), "delete-from-cursor", G_CALLBACK(deleteFromCursorCallback), this);
g_signal_connect(m_nativeWidget.get(), "toggle-overwrite", G_CALLBACK(toggleOverwriteCallback), this);
g_signal_connect(m_nativeWidget.get(), "popup-menu", G_CALLBACK(popupMenuCallback), this);
g_signal_connect(m_nativeWidget.get(), "show-help", G_CALLBACK(showHelpCallback), this);
}
struct KeyCombinationEntry {
unsigned gdkKeyCode;
unsigned state;
const char* name;
};
static const KeyCombinationEntry keyDownEntries[] = {
{ GDK_b, GDK_CONTROL_MASK, "ToggleBold" },
{ GDK_i, GDK_CONTROL_MASK, "ToggleItalic" },
{ GDK_Escape, 0, "Cancel" },
{ GDK_greater, GDK_CONTROL_MASK, "Cancel" },
};
// These commands are text insertion commands, so should take place
// while handling the KeyPress event.
static const KeyCombinationEntry keyPressEntries[] = {
{ GDK_Tab, 0, "InsertTab" },
{ GDK_Tab, GDK_SHIFT_MASK, "InsertBacktab" },
};
void KeyBindingTranslator::getEditorCommandsForKeyEvent(GdkEventKey* event, EventType type, Vector<WTF::String>& commandList)
{
m_pendingEditorCommands.clear();
#ifdef GTK_API_VERSION_2
gtk_bindings_activate_event(GTK_OBJECT(m_nativeWidget.get()), event);
#else
gtk_bindings_activate_event(G_OBJECT(m_nativeWidget.get()), event);
#endif
if (!m_pendingEditorCommands.isEmpty()) {
commandList.appendVector(m_pendingEditorCommands);
return;
}
DEFINE_STATIC_LOCAL(IntConstCharHashMap, keyDownCommandsMap, ());
DEFINE_STATIC_LOCAL(IntConstCharHashMap, keyPressCommandsMap, ());
if (keyDownCommandsMap.isEmpty()) {
for (unsigned i = 0; i < G_N_ELEMENTS(keyDownEntries); i++)
keyDownCommandsMap.set(keyDownEntries[i].state << 16 | keyDownEntries[i].gdkKeyCode, keyDownEntries[i].name);
for (unsigned i = 0; i < G_N_ELEMENTS(keyPressEntries); i++)
keyPressCommandsMap.set(keyPressEntries[i].state << 16 | keyPressEntries[i].gdkKeyCode, keyPressEntries[i].name);
}
// Special-case enter keys for we want them to work regardless of modifier.
if ((event->keyval == GDK_Return || event->keyval == GDK_KP_Enter || event->keyval == GDK_ISO_Enter) && type == KeyPress) {
commandList.append("InsertNewLine");
return;
}
// For keypress events, we want charCode(), but keyCode() does that.
int mapKey = event->state << 16 | event->keyval;
if (mapKey) {
HashMap<int, const char*>* commandMap = type == KeyDown ? &keyDownCommandsMap : &keyPressCommandsMap;
if (const char* commandString = commandMap->get(mapKey)) {
commandList.append(commandString);
return;
}
}
}
} // namespace WebCore
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