195 lines
8.1 KiB
C++
195 lines
8.1 KiB
C++
/* Scintilla source code edit control */
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/* ScintillaGTKAccessible.h - GTK+ accessibility for ScintillaGTK */
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/* Copyright 2016 by Colomban Wendling <colomban@geany.org>
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* The License.txt file describes the conditions under which this software may be distributed. */
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#ifndef SCINTILLAGTKACCESSIBLE_H
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#define SCINTILLAGTKACCESSIBLE_H
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namespace Scintilla {
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#ifndef ATK_CHECK_VERSION
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# define ATK_CHECK_VERSION(x, y, z) 0
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#endif
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class ScintillaGTKAccessible {
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private:
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// weak references to related objects
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GtkAccessible *accessible;
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ScintillaGTK *sci;
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// local state for comparing
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Sci::Position old_pos;
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std::vector<SelectionRange> old_sels;
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bool Enabled() const;
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void UpdateCursor();
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void Notify(GtkWidget *widget, gint code, SCNotification *nt);
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static void SciNotify(GtkWidget *widget, gint code, SCNotification *nt, gpointer data) {
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try {
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static_cast<ScintillaGTKAccessible*>(data)->Notify(widget, code, nt);
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} catch (...) {}
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}
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Sci::Position ByteOffsetFromCharacterOffset(Sci::Position startByte, int characterOffset) {
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if (!(sci->pdoc->LineCharacterIndex() & SC_LINECHARACTERINDEX_UTF32)) {
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return startByte + characterOffset;
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}
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if (characterOffset > 0) {
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// Try and reduce the range by reverse-looking into the character offset cache
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Sci::Line lineStart = sci->pdoc->LineFromPosition(startByte);
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Sci::Position posStart = sci->pdoc->IndexLineStart(lineStart, SC_LINECHARACTERINDEX_UTF32);
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Sci::Line line = sci->pdoc->LineFromPositionIndex(posStart + characterOffset, SC_LINECHARACTERINDEX_UTF32);
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if (line != lineStart) {
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startByte += sci->pdoc->LineStart(line) - sci->pdoc->LineStart(lineStart);
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characterOffset -= sci->pdoc->IndexLineStart(line, SC_LINECHARACTERINDEX_UTF32) - posStart;
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}
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}
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Sci::Position pos = sci->pdoc->GetRelativePosition(startByte, characterOffset);
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if (pos == INVALID_POSITION) {
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// clamp invalid positions inside the document
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if (characterOffset > 0) {
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return sci->pdoc->Length();
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} else {
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return 0;
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}
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}
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return pos;
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}
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Sci::Position ByteOffsetFromCharacterOffset(Sci::Position characterOffset) {
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return ByteOffsetFromCharacterOffset(0, characterOffset);
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}
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Sci::Position CharacterOffsetFromByteOffset(Sci::Position byteOffset) {
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if (!(sci->pdoc->LineCharacterIndex() & SC_LINECHARACTERINDEX_UTF32)) {
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return byteOffset;
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}
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const Sci::Line line = sci->pdoc->LineFromPosition(byteOffset);
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const Sci::Position lineStart = sci->pdoc->LineStart(line);
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return sci->pdoc->IndexLineStart(line, SC_LINECHARACTERINDEX_UTF32) + sci->pdoc->CountCharacters(lineStart, byteOffset);
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}
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void CharacterRangeFromByteRange(Sci::Position startByte, Sci::Position endByte, int *startChar, int *endChar) {
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*startChar = CharacterOffsetFromByteOffset(startByte);
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*endChar = *startChar + sci->pdoc->CountCharacters(startByte, endByte);
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}
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void ByteRangeFromCharacterRange(int startChar, int endChar, Sci::Position& startByte, Sci::Position& endByte) {
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startByte = ByteOffsetFromCharacterOffset(startChar);
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endByte = ByteOffsetFromCharacterOffset(startByte, endChar - startChar);
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}
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Sci::Position PositionBefore(Sci::Position pos) {
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return sci->pdoc->MovePositionOutsideChar(pos - 1, -1, true);
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}
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Sci::Position PositionAfter(Sci::Position pos) {
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return sci->pdoc->MovePositionOutsideChar(pos + 1, 1, true);
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}
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int StyleAt(Sci::Position position, bool ensureStyle = false) {
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if (ensureStyle)
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sci->pdoc->EnsureStyledTo(position);
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return sci->pdoc->StyleAt(position);
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}
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// For AtkText
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gchar *GetTextRangeUTF8(Sci::Position startByte, Sci::Position endByte);
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gchar *GetText(int startChar, int endChar);
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gchar *GetTextAfterOffset(int charOffset, AtkTextBoundary boundaryType, int *startChar, int *endChar);
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gchar *GetTextBeforeOffset(int charOffset, AtkTextBoundary boundaryType, int *startChar, int *endChar);
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gchar *GetTextAtOffset(int charOffset, AtkTextBoundary boundaryType, int *startChar, int *endChar);
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#if ATK_CHECK_VERSION(2, 10, 0)
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gchar *GetStringAtOffset(int charOffset, AtkTextGranularity granularity, int *startChar, int *endChar);
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#endif
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gunichar GetCharacterAtOffset(int charOffset);
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gint GetCharacterCount();
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gint GetCaretOffset();
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gboolean SetCaretOffset(int charOffset);
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gint GetOffsetAtPoint(gint x, gint y, AtkCoordType coords);
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void GetCharacterExtents(int charOffset, gint *x, gint *y, gint *width, gint *height, AtkCoordType coords);
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AtkAttributeSet *GetAttributesForStyle(unsigned int styleNum);
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AtkAttributeSet *GetRunAttributes(int charOffset, int *startChar, int *endChar);
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AtkAttributeSet *GetDefaultAttributes();
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gint GetNSelections();
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gchar *GetSelection(gint selection_num, int *startChar, int *endChar);
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gboolean AddSelection(int startChar, int endChar);
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gboolean RemoveSelection(int selection_num);
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gboolean SetSelection(gint selection_num, int startChar, int endChar);
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// for AtkEditableText
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bool InsertStringUTF8(Sci::Position bytePos, const gchar *utf8, Sci::Position lengthBytes);
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void SetTextContents(const gchar *contents);
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void InsertText(const gchar *text, int lengthBytes, int *charPosition);
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void CopyText(int startChar, int endChar);
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void CutText(int startChar, int endChar);
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void DeleteText(int startChar, int endChar);
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void PasteText(int charPosition);
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public:
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ScintillaGTKAccessible(GtkAccessible *accessible_, GtkWidget *widget_);
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~ScintillaGTKAccessible();
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static ScintillaGTKAccessible *FromAccessible(GtkAccessible *accessible);
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static ScintillaGTKAccessible *FromAccessible(AtkObject *accessible) {
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return FromAccessible(GTK_ACCESSIBLE(accessible));
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}
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// So ScintillaGTK can notify us
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void ChangeDocument(Document *oldDoc, Document *newDoc);
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void NotifyReadOnly();
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void SetAccessibility(bool enabled);
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// Helper GtkWidget methods
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static AtkObject *WidgetGetAccessibleImpl(GtkWidget *widget, AtkObject **cache, gpointer widget_parent_class);
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// ATK methods
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class AtkTextIface {
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public:
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static void init(::AtkTextIface *iface);
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private:
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AtkTextIface();
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static gchar *GetText(AtkText *text, int start_offset, int end_offset);
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static gchar *GetTextAfterOffset(AtkText *text, int offset, AtkTextBoundary boundary_type, int *start_offset, int *end_offset);
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static gchar *GetTextBeforeOffset(AtkText *text, int offset, AtkTextBoundary boundary_type, int *start_offset, int *end_offset);
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static gchar *GetTextAtOffset(AtkText *text, gint offset, AtkTextBoundary boundary_type, gint *start_offset, gint *end_offset);
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#if ATK_CHECK_VERSION(2, 10, 0)
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static gchar *GetStringAtOffset(AtkText *text, gint offset, AtkTextGranularity granularity, gint *start_offset, gint *end_offset);
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#endif
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static gunichar GetCharacterAtOffset(AtkText *text, gint offset);
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static gint GetCharacterCount(AtkText *text);
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static gint GetCaretOffset(AtkText *text);
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static gboolean SetCaretOffset(AtkText *text, gint offset);
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static gint GetOffsetAtPoint(AtkText *text, gint x, gint y, AtkCoordType coords);
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static void GetCharacterExtents(AtkText *text, gint offset, gint *x, gint *y, gint *width, gint *height, AtkCoordType coords);
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static AtkAttributeSet *GetRunAttributes(AtkText *text, gint offset, gint *start_offset, gint *end_offset);
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static AtkAttributeSet *GetDefaultAttributes(AtkText *text);
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static gint GetNSelections(AtkText *text);
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static gchar *GetSelection(AtkText *text, gint selection_num, gint *start_pos, gint *end_pos);
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static gboolean AddSelection(AtkText *text, gint start, gint end);
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static gboolean RemoveSelection(AtkText *text, gint selection_num);
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static gboolean SetSelection(AtkText *text, gint selection_num, gint start, gint end);
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};
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class AtkEditableTextIface {
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public:
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static void init(::AtkEditableTextIface *iface);
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private:
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AtkEditableTextIface();
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static void SetTextContents(AtkEditableText *text, const gchar *contents);
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static void InsertText(AtkEditableText *text, const gchar *contents, gint length, gint *position);
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static void CopyText(AtkEditableText *text, gint start, gint end);
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static void CutText(AtkEditableText *text, gint start, gint end);
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static void DeleteText(AtkEditableText *text, gint start, gint end);
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static void PasteText(AtkEditableText *text, gint position);
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};
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};
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}
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#endif /* SCINTILLAGTKACCESSIBLE_H */
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