From 327dab50c887d2818cac9109049bf5fc1f391a17 Mon Sep 17 00:00:00 2001
From: "Javier S. Pedro" <dev.git@javispedro.com>
Date: Sat, 27 Sep 2014 18:15:22 +0200
Subject: enable all the builtin watchfaces

---
 src/widgetinfomodel.cpp | 125 +++++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 113 insertions(+), 12 deletions(-)

(limited to 'src/widgetinfomodel.cpp')

diff --git a/src/widgetinfomodel.cpp b/src/widgetinfomodel.cpp
index e2f145f..9bb53e4 100644
--- a/src/widgetinfomodel.cpp
+++ b/src/widgetinfomodel.cpp
@@ -1,4 +1,5 @@
 #include <QtCore/QDebug>
+#include <QtCore/QBitArray>
 #include <QtCore/QStringList>
 #include "widgetinfomodel.h"
 
@@ -10,6 +11,82 @@ inline QString get_widget_dconf_base(int index)
 	return QString("widget%1_").arg(index);
 }
 
+WidgetInfo::WidgetPosition canonicalize_widget_pos(WidgetInfo::WidgetPosition pos, WidgetInfo::WidgetSize size)
+{
+	switch (size) {
+	case WidgetInfo::Size1Q:
+		return pos; // Any position is valid
+	case WidgetInfo::Size2QHorizontal:
+		switch (pos) {
+		case WidgetInfo::PosNW:
+		case WidgetInfo::PosNE:
+			return WidgetInfo::PosNW;
+		case WidgetInfo::PosSW:
+		case WidgetInfo::PosSE:
+			return WidgetInfo::PosSW;
+		}
+		break;
+	case WidgetInfo::Size2QVertical:
+		switch (pos) {
+		case WidgetInfo::PosNW:
+		case WidgetInfo::PosSW:
+			return WidgetInfo::PosNW;
+		case WidgetInfo::PosNE:
+		case WidgetInfo::PosSE:
+			return WidgetInfo::PosNE;
+		}
+		break;
+	case WidgetInfo::Size4Q:
+		return WidgetInfo::PosNW; // 4Q widgets use entire screen
+	}
+
+	return pos;
+}
+
+QBitArray used_positions(WidgetInfo::WidgetPosition pos, WidgetInfo::WidgetSize size)
+{
+	QBitArray used(4, false);
+
+	switch (size) {
+	case WidgetInfo::Size1Q:
+		used[pos] = true;
+		break;
+	case WidgetInfo::Size2QHorizontal:
+		switch (pos) {
+		case WidgetInfo::PosNW:
+		case WidgetInfo::PosNE:
+			used[WidgetInfo::PosNW] = true;
+			used[WidgetInfo::PosNE] = true;
+			break;
+		case WidgetInfo::PosSW:
+		case WidgetInfo::PosSE:
+			used[WidgetInfo::PosNW] = true;
+			used[WidgetInfo::PosNE] = true;
+			break;
+		}
+		break;
+	case WidgetInfo::Size2QVertical:
+		switch (pos) {
+		case WidgetInfo::PosNW:
+		case WidgetInfo::PosSW:
+			used[WidgetInfo::PosNW] = true;
+			used[WidgetInfo::PosSW] = true;
+			break;
+		case WidgetInfo::PosNE:
+		case WidgetInfo::PosSE:
+			used[WidgetInfo::PosNE] = true;
+			used[WidgetInfo::PosSE] = true;
+			break;
+		}
+		break;
+	case WidgetInfo::Size4Q:
+		used.fill(true);
+		break;
+	}
+
+	return used;
+}
+
 }
 
 WidgetInfoModel::WidgetInfoModel(const QString &settingsPrefix, QObject *parent) :
@@ -69,23 +146,21 @@ QList<WidgetInfo> WidgetInfoModel::toList() const
 	return _widgets.toList();
 }
 
-void WidgetInfoModel::reload()
+bool WidgetInfoModel::widgetOverlaps(int page, WidgetInfo::WidgetPosition pos, WidgetInfo::WidgetSize size) const
 {
-	beginResetModel();
-	_widgets.resize(16);
+	QBitArray usedPos = used_positions(pos, size);
 
 	for (int i = 0; i < _widgets.size(); i++) {
-		WidgetInfo &info = _widgets[i];
-		const QString base = get_widget_dconf_base(i);
+		if (_widgets[i].url().isEmpty()) continue;
+		if (_widgets[i].page() != page) continue;
 
-		info.setInvert(_settings->value(base + "invert").toBool());
-		info.setPage(_settings->value(base + "page").toInt());
-		info.setSize(static_cast<WidgetInfo::WidgetSize>(_settings->value(base + "size").toInt()));
-		info.setPosition(static_cast<WidgetInfo::WidgetPosition>(_settings->value(base + "position").toInt()));
-		info.setUrl(_settings->value(base + "url").toUrl());
+		QBitArray intersection = usedPos & used_positions(_widgets[i].position(), _widgets[i].size());
+		if (intersection.count(true) > 0) {
+			return true;
+		}
 	}
 
-	endResetModel();
+	return false;
 }
 
 int WidgetInfoModel::addWidget(const QUrl &url, int page, WidgetInfo::WidgetPosition pos, WidgetInfo::WidgetSize size)
@@ -93,11 +168,18 @@ int WidgetInfoModel::addWidget(const QUrl &url, int page, WidgetInfo::WidgetPosi
 	int slot = findEmptySlot();
 	if (slot == -1) {
 		qWarning() << "No empty slots!"; // This shouldn't happen
-		return slot;
+		return -1;
 	}
 
+	pos = canonicalize_widget_pos(pos, size);
+
 	qDebug() << "Adding widget" << url << page << pos << size;
 
+	if (widgetOverlaps(page, pos, size)) {
+		qWarning() << "Can't add the widget: it overlaps with an existing one!";
+		return -1;
+	}
+
 	const QString base = get_widget_dconf_base(slot);
 
 	_settings->setValue(base + "invert", QVariant::fromValue<bool>(false));
@@ -122,6 +204,25 @@ void WidgetInfoModel::removeWidget(int widgetId)
 	_settings->setValue(base + "position", QVariant());
 }
 
+void WidgetInfoModel::reload()
+{
+	beginResetModel();
+	_widgets.resize(16);
+
+	for (int i = 0; i < _widgets.size(); i++) {
+		WidgetInfo &info = _widgets[i];
+		const QString base = get_widget_dconf_base(i);
+
+		info.setInvert(_settings->value(base + "invert").toBool());
+		info.setPage(_settings->value(base + "page").toInt());
+		info.setSize(static_cast<WidgetInfo::WidgetSize>(_settings->value(base + "size").toInt()));
+		info.setPosition(static_cast<WidgetInfo::WidgetPosition>(_settings->value(base + "position").toInt()));
+		info.setUrl(_settings->value(base + "url").toUrl());
+	}
+
+	endResetModel();
+}
+
 int WidgetInfoModel::findEmptySlot()
 {
 	for (int i = 0; i < _widgets.size(); i++) {
-- 
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