Initial commit

gui/widgets/edittext.cpp

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+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "common/system.h"
+#include "common/unicode-bidi.h"
+#include "gui/widgets/edittext.h"
+#include "gui/gui-manager.h"
+
+#include "gui/ThemeEval.h"
+
+namespace GUI {
+
+EditTextWidget::EditTextWidget(GuiObject *boss, int x, int y, int w, int h, bool scale, const Common::U32String &text, const Common::U32String &tooltip, uint32 cmd, uint32 finishCmd, ThemeEngine::FontStyle font)
+	: EditableWidget(boss, x, y - 1, w, h + 2, scale, tooltip, cmd) {
+	setFlags(WIDGET_ENABLED | WIDGET_CLEARBG | WIDGET_RETAIN_FOCUS | WIDGET_WANT_TICKLE);
+	_type = kEditTextWidget;
+	_finishCmd = finishCmd;
+
+	_leftPadding = _rightPadding = 0;
+
+	setEditString(text);
+	setFontStyle(font);
+}
+
+EditTextWidget::EditTextWidget(GuiObject *boss, int x, int y, int w, int h, const Common::U32String &text, const Common::U32String &tooltip, uint32 cmd, uint32 finishCmd, ThemeEngine::FontStyle font)
+	: EditTextWidget(boss, x, y, w, h, false, text, tooltip, cmd, finishCmd, font) {
+}
+
+EditTextWidget::EditTextWidget(GuiObject *boss, const Common::String &name, const Common::U32String &text, const Common::U32String &tooltip, uint32 cmd, uint32 finishCmd, ThemeEngine::FontStyle font)
+	: EditableWidget(boss, name, tooltip, cmd) {
+	setFlags(WIDGET_ENABLED | WIDGET_CLEARBG | WIDGET_RETAIN_FOCUS | WIDGET_WANT_TICKLE);
+	_type = kEditTextWidget;
+	_finishCmd = finishCmd;
+
+	_leftPadding = _rightPadding = 0;
+	_shiftPressed = _isDragging = false;
+
+	setEditString(text);
+	setFontStyle(font);
+}
+
+void EditTextWidget::setEditString(const Common::U32String &str) {
+	EditableWidget::setEditString(str);
+	_backupString = str;
+}
+
+void EditTextWidget::reflowLayout() {
+	_leftPadding = g_gui.xmlEval()->getVar("Globals.EditTextWidget.Padding.Left", 0);
+	_rightPadding = g_gui.xmlEval()->getVar("Globals.EditTextWidget.Padding.Right", 0);
+
+	EditableWidget::reflowLayout();
+}
+
+void EditTextWidget::drawWidget() {
+	g_gui.theme()->drawWidgetBackground(Common::Rect(_x, _y, _x + _w, _y + _h),
+	                                    ThemeEngine::kWidgetBackgroundEditText);
+
+	// Draw the text
+	adjustOffset();
+	Common::Rect drawRect = getEditRect();
+	drawRect.translate(_x, _y);
+	setTextDrawableArea(drawRect);
+
+	int x = -_editScrollOffset;
+	int y = drawRect.top;
+
+	int selBegin = _selCaretPos;
+	int selEnd = _selOffset + _selCaretPos;
+	if (selBegin > selEnd)
+		SWAP(selBegin, selEnd);
+	selBegin = MAX(selBegin, 0);
+	selEnd = MAX(selEnd, 0);
+	
+	if (!g_gui.useRTL()) {
+		Common::UnicodeBiDiText utxt(_editString);
+		Common::U32String left = Common::U32String(utxt.visual.c_str(), utxt.visual.c_str() + selBegin);
+		Common::U32String selected = Common::U32String(utxt.visual.c_str() + selBegin, selEnd - selBegin);
+		Common::U32String right = Common::U32String(utxt.visual.c_str() + selEnd);
+		Common::U32StringArray parts {left, selected, right};
+		int scrollOffset = _editScrollOffset;
+		for (uint i = 0; i < parts.size(); i++) {
+			if (!parts[i].size())
+				continue;
+			Common::U32String part = parts[i];
+			int partW = g_gui.getStringWidth(part, _font);
+			int clipL = drawRect.left + (scrollOffset < 0 ? -scrollOffset : 0);
+			int clipR = MIN(clipL + partW, (int)drawRect.right);
+			if (x + partW > 0 && x < _w && clipL < drawRect.right) {
+				int sO = scrollOffset < 0 ? 0 : -scrollOffset;
+				_inversion = i == 1 ? ThemeEngine::kTextInversionFocus : ThemeEngine::kTextInversionNone;
+				g_gui.theme()->drawText(Common::Rect(clipL, y, clipR, y + drawRect.height()), part, _state,
+				                        _drawAlign, _inversion, sO, false, _font, ThemeEngine::kFontColorNormal, 
+				                        true, _textDrawableArea);
+			}
+			x += partW;
+			scrollOffset -= partW;
+		}
+	} else {
+		// The above method does not render RTL languages correctly, so fallback to default method
+		// There are only two possible cases, either the whole string has been selected
+		// or nothing has been selected.
+		_inversion = _selOffset ? ThemeEngine::kTextInversionFocus : ThemeEngine::kTextInversionNone;
+		g_gui.theme()->drawText(drawRect, _editString, _state, _drawAlign, _inversion, 
+		                        -_editScrollOffset, false, _font, ThemeEngine::kFontColorNormal, true, 
+		                        _textDrawableArea);
+	}
+
+	EditableWidget::drawWidget();
+}
+
+Common::Rect EditTextWidget::getEditRect() const {
+	// Calculate (right - left) difference for editRect's X-axis coordinates:
+	// (_w - 1 - _rightPadding) - (2 + _leftPadding)
+	int editWidth = _w - _rightPadding - _leftPadding - 3;
+	int editHeight = _h - 2;
+	// Ensure r will always be a valid rect
+	if (editWidth < 0) {
+		editWidth = 0;
+	}
+	if (editHeight < 0) {
+		editHeight = 0;
+	}
+	Common::Rect r(2 + _leftPadding, 1, 2 + _leftPadding + editWidth, 1 + editHeight);
+
+	return r;
+}
+
+void EditTextWidget::receivedFocusWidget() {
+	g_system->setFeatureState(OSystem::kFeatureVirtualKeyboard, true);
+}
+
+void EditTextWidget::lostFocusWidget() {
+	// If we lose focus, 'commit' the user changes and clear selection
+	_backupString = _editString;
+	drawCaret(true);
+	clearSelection();
+
+	g_system->setFeatureState(OSystem::kFeatureVirtualKeyboard, false);
+}
+
+void EditTextWidget::startEditMode() {
+}
+
+void EditTextWidget::endEditMode() {
+	releaseFocus();
+
+	sendCommand(_finishCmd, 0);
+}
+
+void EditTextWidget::abortEditMode() {
+	setEditString(_backupString);
+	sendCommand(_cmd, 0);
+
+	releaseFocus();
+}
+
+} // End of namespace GUI