Qt platform layer added. Based on an implementation from Jason Haslam

at Scientific Toolworks, Inc. with additions performed for Wingware.

1 files changed, 635 insertions, 0 deletions

diff --git a/qt/ScintillaEditBase/ScintillaEditBase.cpp b/qt/ScintillaEditBase/ScintillaEditBase.cpp
new file mode 100644
index 000000000..b6cca8166
--- /dev/null
+++ b/qt/ScintillaEditBase/ScintillaEditBase.cpp
@@ -0,0 +1,635 @@
+//
+//          Copyright (c) 1990-2011, Scientific Toolworks, Inc.
+//
+// The License.txt file describes the conditions under which this software may be distributed.
+//
+// Author: Jason Haslam
+//
+// Additions Copyright (c) 2011 Archaeopteryx Software, Inc. d/b/a Wingware
+// ScintillaEditBase.cpp - Qt widget that wraps ScintillaQt and provides events and scrolling
+
+#include "ScintillaEditBase.h"
+#include "ScintillaQt.h"
+#include "PlatQt.h"
+
+#include <QApplication>
+#include <QInputContext>
+#include <QPainter>
+#include <QScrollBar>
+#include <QTextFormat>
+#include <QVarLengthArray>
+
+#define INDIC_INPUTMETHOD 24
+
+#ifdef SCI_NAMESPACE
+using namespace Scintilla;
+#endif
+
+ScintillaEditBase::ScintillaEditBase(QWidget *parent)
+: QAbstractScrollArea(parent), sqt(0), preeditPos(-1), wheelDelta(0)
+{
+	sqt = new ScintillaQt(this);
+
+	time.start();
+
+	// Set Qt defaults.
+	setAcceptDrops(true);
+	setMouseTracking(true);
+	setAutoFillBackground(false);
+	setFrameStyle(QFrame::NoFrame);
+	setFocusPolicy(Qt::StrongFocus);
+	setAttribute(Qt::WA_StaticContents);
+	setAttribute(Qt::WA_OpaquePaintEvent);
+	setAttribute(Qt::WA_KeyCompression);
+	setAttribute(Qt::WA_InputMethodEnabled);
+
+	connect(sqt, SIGNAL(notifyParent(SCNotification)),
+	        this, SLOT(notifyParent(SCNotification)));
+
+	// Connect scroll bars.
+	connect(verticalScrollBar(), SIGNAL(valueChanged(int)),
+	        this, SLOT(scrollVertical(int)));
+	connect(horizontalScrollBar(), SIGNAL(valueChanged(int)),
+	        this, SLOT(scrollHorizontal(int)));
+
+	// Connect pass-through signals.
+	connect(sqt, SIGNAL(horizontalRangeChanged(int,int)),
+	        this, SIGNAL(horizontalRangeChanged(int,int)));
+	connect(sqt, SIGNAL(verticalRangeChanged(int,int)),
+	        this, SIGNAL(verticalRangeChanged(int,int)));
+	connect(sqt, SIGNAL(horizontalScrolled(int)),
+	        this, SIGNAL(horizontalScrolled(int)));
+	connect(sqt, SIGNAL(verticalScrolled(int)),
+	        this, SIGNAL(verticalScrolled(int)));
+
+	connect(sqt, SIGNAL(notifyChange()),
+	        this, SIGNAL(notifyChange()));
+
+	connect(sqt, SIGNAL(command(uptr_t, sptr_t)),
+	        this, SLOT(event_command(uptr_t, sptr_t)));
+
+	connect(sqt, SIGNAL(aboutToCopy(QMimeData *)),
+	        this, SIGNAL(aboutToCopy(QMimeData *)));
+}
+
+ScintillaEditBase::~ScintillaEditBase() {}
+
+sptr_t ScintillaEditBase::send(
+	unsigned int iMessage,
+	uptr_t wParam,
+	sptr_t lParam) const
+{
+	return sqt->WndProc(iMessage, wParam, lParam);
+}
+
+sptr_t ScintillaEditBase::sends(
+    unsigned int iMessage,
+    uptr_t wParam,
+    const char *s) const
+{
+	return sqt->WndProc(iMessage, wParam, (sptr_t)s);
+}
+
+void ScintillaEditBase::scrollHorizontal(int value)
+{
+	sqt->HorizontalScrollTo(value);
+}
+
+void ScintillaEditBase::scrollVertical(int value)
+{
+	sqt->ScrollTo(value);
+}
+
+bool ScintillaEditBase::event(QEvent *event)
+{
+	bool result = false;
+
+	if (event->type() == QEvent::KeyPress) {
+		// Circumvent the tab focus convention.
+		keyPressEvent(static_cast<QKeyEvent *>(event));
+		result = event->isAccepted();
+	} else {
+		result = QAbstractScrollArea::event(event);
+	}
+
+	return result;
+}
+
+void ScintillaEditBase::paintEvent(QPaintEvent *event)
+{
+	sqt->PartialPaint(PRectFromQRect(event->rect()));
+}
+
+void ScintillaEditBase::wheelEvent(QWheelEvent *event)
+{
+	if (event->orientation() == Qt::Horizontal) {
+		if (horizontalScrollBarPolicy() == Qt::ScrollBarAlwaysOff)
+			event->ignore();
+		else
+			QAbstractScrollArea::wheelEvent(event);
+	} else {
+		if (event->modifiers() & Qt::ControlModifier) {
+			// Zoom! We play with the font sizes in the styles.
+			// Number of steps/line is ignored, we just care if sizing up or down
+			if (event->delta() > 0) {
+				sqt->KeyCommand(SCI_ZOOMIN);
+			} else {
+				sqt->KeyCommand(SCI_ZOOMOUT);
+			}
+		} else {
+			// Ignore wheel events when the scroll bars are disabled.
+			if (verticalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) {
+				event->ignore();
+			} else {
+				// Scroll
+				QAbstractScrollArea::wheelEvent(event);
+			}
+		}
+	}
+}
+
+void ScintillaEditBase::focusInEvent(QFocusEvent *event)
+{
+	sqt->SetFocusState(true);
+	emit updateUi();
+
+	QAbstractScrollArea::focusInEvent(event);
+}
+
+void ScintillaEditBase::focusOutEvent(QFocusEvent *event)
+{
+	sqt->SetFocusState(false);
+
+	QAbstractScrollArea::focusOutEvent(event);
+}
+
+void ScintillaEditBase::resizeEvent(QResizeEvent *)
+{
+	sqt->ChangeSize();
+	emit resized();
+}
+
+void ScintillaEditBase::keyPressEvent(QKeyEvent *event)
+{
+	// All keystrokes containing the meta modifier are
+	// assumed to be shortcuts not handled by scintilla.
+	if (event->modifiers() & Qt::MetaModifier) {
+		QAbstractScrollArea::keyPressEvent(event);
+		emit keyPressed(event);
+		return;
+	}
+
+	int key = 0;
+	switch (event->key()) {
+		case Qt::Key_Down:          key = SCK_DOWN;     break;
+		case Qt::Key_Up:            key = SCK_UP;       break;
+		case Qt::Key_Left:          key = SCK_LEFT;     break;
+		case Qt::Key_Right:         key = SCK_RIGHT;    break;
+		case Qt::Key_Home:          key = SCK_HOME;     break;
+		case Qt::Key_End:           key = SCK_END;      break;
+		case Qt::Key_PageUp:        key = SCK_PRIOR;    break;
+		case Qt::Key_PageDown:      key = SCK_NEXT;     break;
+		case Qt::Key_Delete:        key = SCK_DELETE;   break;
+		case Qt::Key_Insert:        key = SCK_INSERT;   break;
+		case Qt::Key_Escape:        key = SCK_ESCAPE;   break;
+		case Qt::Key_Backspace:     key = SCK_BACK;     break;
+		case Qt::Key_Plus:          key = SCK_ADD;      break;
+		case Qt::Key_Minus:         key = SCK_SUBTRACT; break;
+		case Qt::Key_Backtab:       // fall through
+		case Qt::Key_Tab:           key = SCK_TAB;      break;
+		case Qt::Key_Enter:         // fall through
+		case Qt::Key_Return:        key = SCK_RETURN;   break;
+		case Qt::Key_Control:       key = 0;            break;
+		case Qt::Key_Alt:           key = 0;            break;
+		case Qt::Key_Shift:         key = 0;            break;
+		case Qt::Key_Meta:          key = 0;            break;
+		default:                    key = event->key(); break;
+	}
+
+	bool shift = event->modifiers() & Qt::ShiftModifier;
+	bool ctrl  = event->modifiers() & Qt::ControlModifier;
+	bool alt   = event->modifiers() & Qt::AltModifier;
+
+	bool consumed = false;
+	bool added = sqt->KeyDown(key, shift, ctrl, alt, &consumed) != 0;
+	if (!consumed)
+		consumed = added;
+
+	if (!consumed) {
+		// Don't insert text if the control key was pressed unless
+		// it was pressed in conjunction with alt for AltGr emulation.
+		bool input = (!ctrl || alt);
+
+		// Additionally, on non-mac platforms, don't insert text
+		// if the alt key was pressed unless control is also present.
+		// On mac alt can be used to insert special characters.
+#ifndef Q_WS_MAC
+		input &= (!alt || ctrl);
+#endif
+
+		QString text = event->text();
+		if (input && !text.isEmpty() && text[0].isPrint()) {
+			QByteArray utext = sqt->BytesForDocument(text);
+			sqt->AddCharUTF(utext.data(), utext.size());
+		} else {
+			event->ignore();
+		}
+	}
+
+	emit keyPressed(event);
+}
+
+static int modifierTranslated(int sciModifier)
+{
+	switch (sciModifier) {
+		case SCMOD_SHIFT:
+			return Qt::ShiftModifier;
+		case SCMOD_CTRL:
+			return Qt::ControlModifier;
+		case SCMOD_ALT:
+			return Qt::AltModifier;
+		case SCMOD_SUPER:
+			return Qt::MetaModifier;
+		default:
+			return 0;
+	}
+}
+
+void ScintillaEditBase::mousePressEvent(QMouseEvent *event)
+{
+	Point pos = PointFromQPoint(event->pos());
+
+	emit buttonPressed(event);
+
+	if (event->button() == Qt::MidButton &&
+	    QApplication::clipboard()->supportsSelection()) {
+		SelectionPosition selPos = sqt->SPositionFromLocation(
+					pos, false, false, sqt->UserVirtualSpace());
+		sqt->sel.Clear();
+		sqt->SetSelection(selPos, selPos);
+		sqt->PasteFromMode(QClipboard::Selection);
+		return;
+	}
+
+	bool button = event->button() == Qt::LeftButton;
+
+	if (button) {
+		bool shift = event->modifiers() & Qt::ShiftModifier;
+		bool ctrl  = event->modifiers() & Qt::ControlModifier;
+#ifdef Q_WS_X11
+		// On X allow choice of rectangular modifier since most window
+		// managers grab alt + click for moving windows.
+		bool alt   = event->modifiers() & modifierTranslated(sqt->rectangularSelectionModifier);
+#else
+		bool alt   = event->modifiers() & Qt::AltModifier;
+#endif
+
+		sqt->ButtonDown(pos, time.elapsed(), shift, ctrl, alt);
+	}
+}
+
+void ScintillaEditBase::mouseReleaseEvent(QMouseEvent *event)
+{
+	Point point = PointFromQPoint(event->pos());
+	bool ctrl  = event->modifiers() & Qt::ControlModifier;
+	if (event->button() == Qt::LeftButton)
+		sqt->ButtonUp(point, time.elapsed(), ctrl);
+
+	int pos = send(SCI_POSITIONFROMPOINT, point.x, point.y);
+	int line = send(SCI_LINEFROMPOSITION, pos);
+	int modifiers = event->modifiers();
+
+	emit textAreaClicked(line, modifiers);
+	emit buttonReleased(event);
+}
+
+void ScintillaEditBase::mouseDoubleClickEvent(QMouseEvent *event)
+{
+	// Scintilla does its own double-click detection.
+	mousePressEvent(event);
+}
+
+void ScintillaEditBase::mouseMoveEvent(QMouseEvent *event)
+{
+	Point pos = PointFromQPoint(event->pos());
+	sqt->ButtonMove(pos);
+}
+
+void ScintillaEditBase::contextMenuEvent(QContextMenuEvent *event)
+{
+	Point pos = PointFromQPoint(event->globalPos());
+	Point pt = PointFromQPoint(event->pos());
+	if (!sqt->PointInSelection(pt))
+		sqt->SetEmptySelection(sqt->PositionFromLocation(pt));
+	sqt->ContextMenu(pos);
+}
+
+void ScintillaEditBase::dragEnterEvent(QDragEnterEvent *event)
+{
+	if (event->mimeData()->hasText()) {
+		event->acceptProposedAction();
+
+		Point point = PointFromQPoint(event->pos());
+		sqt->DragEnter(point);
+	} else {
+		event->ignore();
+	}
+}
+
+void ScintillaEditBase::dragLeaveEvent(QDragLeaveEvent * /* event */)
+{
+	sqt->DragLeave();
+}
+
+void ScintillaEditBase::dragMoveEvent(QDragMoveEvent *event)
+{
+	if (event->mimeData()->hasText()) {
+		event->acceptProposedAction();
+
+		Point point = PointFromQPoint(event->pos());
+		sqt->DragMove(point);
+	} else {
+		event->ignore();
+	}
+}
+
+void ScintillaEditBase::dropEvent(QDropEvent *event)
+{
+	if (event->mimeData()->hasText()) {
+		event->acceptProposedAction();
+
+		Point point = PointFromQPoint(event->pos());
+		bool move = (event->source() == this &&
+                 event->proposedAction() == Qt::MoveAction);
+		sqt->Drop(point, event->mimeData(), move);
+	} else {
+		event->ignore();
+	}
+}
+
+void ScintillaEditBase::inputMethodEvent(QInputMethodEvent *event)
+{
+	// Clear the current selection.
+	sqt->ClearSelection();
+	if (preeditPos >= 0)
+		sqt->SetSelection(preeditPos, preeditPos);
+
+	// Insert the commit string.
+	if (!event->commitString().isEmpty() || event->replacementLength()) {
+		// Select the text to be removed.
+		int commitPos = send(SCI_GETCURRENTPOS);
+		int start = commitPos + event->replacementStart();
+		int end = start + event->replacementLength();
+		sqt->SetSelection(start, end);
+
+		// Replace the selection with the commit string.
+		QByteArray commitBytes = sqt->BytesForDocument(event->commitString());
+		char *commitData = commitBytes.data();
+		sqt->AddCharUTF(commitData, strlen(commitData));
+	}
+
+	// Select the previous preedit string.
+	int pos = send(SCI_GETCURRENTPOS);
+	int length = sqt->BytesForDocument(preeditString).length();
+	sqt->SetSelection(pos, pos + length);
+
+	// Replace the selection with the new preedit string.
+	QByteArray bytes = sqt->BytesForDocument(event->preeditString());
+	char *data = bytes.data();
+	bool recording = sqt->recordingMacro;
+	sqt->recordingMacro = false;
+	send(SCI_SETUNDOCOLLECTION, false);
+	sqt->AddCharUTF(data, strlen(data));
+	send(SCI_SETUNDOCOLLECTION, true);
+	sqt->recordingMacro = recording;
+	sqt->SetSelection(pos, pos);
+
+	// Store the state of the current preedit string.
+	preeditString = event->preeditString();
+	preeditPos = !preeditString.isEmpty() ? send(SCI_GETCURRENTPOS) : -1;
+
+	if (!preeditString.isEmpty()) {
+		// Apply attributes to the preedit string.
+		int indicNum = 0;
+		sqt->ShowCaretAtCurrentPosition();
+		foreach (QInputMethodEvent::Attribute a, event->attributes()) {
+			QString prefix = preeditString.left(a.start);
+			QByteArray prefixBytes = sqt->BytesForDocument(prefix);
+			int prefixLength = prefixBytes.length();
+			int caretPos = preeditPos + prefixLength;
+
+			if (a.type == QInputMethodEvent::Cursor) {
+				sqt->SetSelection(caretPos, caretPos);
+				if (!a.length)
+					sqt->DropCaret();
+
+			} else if (a.type == QInputMethodEvent::TextFormat) {
+				Q_ASSERT(a.value.canConvert(QVariant::TextFormat));
+				QTextFormat format = a.value.value<QTextFormat>();
+				Q_ASSERT(format.isCharFormat());
+				QTextCharFormat charFormat = format.toCharFormat();
+
+				QString sub = preeditString.mid(a.start, a.length);
+				QByteArray subBytes = sqt->BytesForDocument(sub);
+				int subLength = subBytes.length();
+
+				if (charFormat.underlineStyle() != QTextCharFormat::NoUnderline) {
+					// Set temporary indicator for underline style.
+					QColor uc = charFormat.underlineColor();
+					int style = INDIC_PLAIN;
+					if (charFormat.underlineStyle() == QTextCharFormat::DashUnderline)
+						style = INDIC_DASH;
+					send(SCI_INDICSETSTYLE, INDIC_INPUTMETHOD + indicNum, style);
+					send(SCI_INDICSETFORE, INDIC_INPUTMETHOD + indicNum, uc.rgb());
+					send(SCI_SETINDICATORCURRENT, INDIC_INPUTMETHOD + indicNum);
+					send(SCI_INDICATORFILLRANGE, caretPos, subLength);
+					indicNum++;
+				}
+			}
+		}
+	}
+}
+
+QVariant ScintillaEditBase::inputMethodQuery(Qt::InputMethodQuery query) const
+{
+	int pos = send(SCI_GETCURRENTPOS);
+	int line = send(SCI_LINEFROMPOSITION, pos);
+
+	switch (query) {
+		case Qt::ImMicroFocus:
+		{
+			int startPos = (preeditPos >= 0) ? preeditPos : pos;
+			Point pt = sqt->LocationFromPosition(startPos);
+			int width = send(SCI_GETCARETWIDTH);
+			int height = send(SCI_TEXTHEIGHT, line);
+			return QRect(pt.x, pt.y, width, height);
+		}
+
+		case Qt::ImFont:
+		{
+			char fontName[64];
+			int style = send(SCI_GETSTYLEAT, pos);
+			int len = send(SCI_STYLEGETFONT, style, (long)fontName);
+			int size = send(SCI_STYLEGETSIZE, style);
+			bool italic = send(SCI_STYLEGETITALIC, style);
+			int weight = send(SCI_STYLEGETBOLD, style) ? QFont::Bold : -1;
+			return QFont(QString::fromUtf8(fontName, len), size, weight, italic);
+		}
+
+		case Qt::ImCursorPosition:
+		{
+			int paraStart = sqt->pdoc->ParaUp(pos);
+			return pos - paraStart;
+		}
+
+		case Qt::ImSurroundingText:
+		{
+			int paraStart = sqt->pdoc->ParaUp(pos);
+			int paraEnd = sqt->pdoc->ParaDown(pos);
+			QVarLengthArray<char,1024> buffer(paraEnd - paraStart + 1);
+
+			Sci_CharacterRange charRange;
+			charRange.cpMin = paraStart;
+			charRange.cpMax = paraEnd;
+
+			Sci_TextRange textRange;
+			textRange.chrg = charRange;
+			textRange.lpstrText = buffer.data();
+
+			send(SCI_GETTEXTRANGE, 0, (long)&textRange);
+
+			return sqt->StringFromDocument(buffer.constData());
+		}
+
+		case Qt::ImCurrentSelection:
+		{
+			QVarLengthArray<char,1024> buffer(send(SCI_GETSELTEXT));
+			send(SCI_GETSELTEXT, 0, (long)buffer.data());
+
+			return sqt->StringFromDocument(buffer.constData());
+		}
+
+		default:
+			return QVariant();
+	}
+}
+
+void ScintillaEditBase::notifyParent(SCNotification scn)
+{
+	emit notify(&scn);
+	switch (scn.nmhdr.code) {
+		case SCN_STYLENEEDED:
+			emit styleNeeded(scn.position);
+			break;
+
+		case SCN_CHARADDED:
+			emit charAdded(scn.ch);
+			break;
+
+		case SCN_SAVEPOINTREACHED:
+			emit savePointChanged(false);
+			break;
+
+		case SCN_SAVEPOINTLEFT:
+			emit savePointChanged(true);
+			break;
+
+		case SCN_MODIFYATTEMPTRO:
+			emit modifyAttemptReadOnly();
+			break;
+
+		case SCN_KEY:
+			emit key(scn.ch);
+			break;
+
+		case SCN_DOUBLECLICK:
+			emit doubleClick(scn.position, scn.line);
+			break;
+
+		case SCN_UPDATEUI:
+			emit updateUi();
+			break;
+
+		case SCN_MODIFIED:
+		{
+			bool added = scn.modificationType & SC_MOD_INSERTTEXT;
+			bool deleted = scn.modificationType & SC_MOD_DELETETEXT;
+
+			int length = send(SCI_GETTEXTLENGTH);
+			bool firstLineAdded = (added && length == 1) ||
+			                      (deleted && length == 0);
+
+			if (scn.linesAdded != 0) {
+				emit linesAdded(scn.linesAdded);
+			} else if (firstLineAdded) {
+				emit linesAdded(added ? 1 : -1);
+			}
+
+			const QByteArray bytes = QByteArray::fromRawData(scn.text, scn.length);
+			emit modified(scn.modificationType, scn.position, scn.length,
+			              scn.linesAdded, bytes, scn.line,
+			              scn.foldLevelNow, scn.foldLevelPrev);
+			break;
+		}
+
+		case SCN_MACRORECORD:
+			emit macroRecord(scn.message, scn.wParam, scn.lParam);
+			break;
+
+		case SCN_MARGINCLICK:
+			emit marginClicked(scn.position, scn.modifiers, scn.margin);
+			break;
+
+		case SCN_NEEDSHOWN:
+			emit needShown(scn.position, scn.length);
+			break;
+
+		case SCN_PAINTED:
+			emit painted();
+			break;
+
+		case SCN_USERLISTSELECTION:
+			emit userListSelection();
+			break;
+
+		case SCN_URIDROPPED:
+			emit uriDropped();
+			break;
+
+		case SCN_DWELLSTART:
+			emit dwellStart(scn.x, scn.y);
+			break;
+
+		case SCN_DWELLEND:
+			emit dwellEnd(scn.x, scn.y);
+			break;
+
+		case SCN_ZOOM:
+			emit zoom(send(SCI_GETZOOM));
+			break;
+
+		case SCN_HOTSPOTCLICK:
+			emit hotSpotClick(scn.position, scn.modifiers);
+			break;
+
+		case SCN_HOTSPOTDOUBLECLICK:
+			emit hotSpotDoubleClick(scn.position, scn.modifiers);
+			break;
+
+		case SCN_CALLTIPCLICK:
+			emit callTipClick();
+			break;
+
+		case SCN_AUTOCSELECTION:
+			emit autoCompleteSelection(scn.lParam, QString::fromUtf8(scn.text));
+			break;
+
+		default:
+			return;
+	}
+}
+
+void ScintillaEditBase::event_command(uptr_t wParam, sptr_t lParam)
+{
+	emit command(wParam, lParam);
+}