core: create string-format.cpp source file

The mobile version of the list used string formatting functions
defined in DiveObjectHelper and declared in mobilelistmodels.h.
Very confusing. Move them to a separate source file where - in
the long run - all the string-formatting functions, which
are scattered all over the place, can be collected.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

7 files changed, 178 insertions, 156 deletions

diff --git a/Subsurface-mobile.pro b/Subsurface-mobile.pro
index 2da1e5703..5641f422d 100644
--- a/Subsurface-mobile.pro
+++ b/Subsurface-mobile.pro
@@ -89,6 +89,7 @@ SOURCES += subsurface-mobile-main.cpp \
 	core/membuffer.c \
 	core/selection.cpp \
 	core/sha1.c \
+	core/string-format.cpp \
 	core/strtod.c \
 	core/tag.c \
 	core/taxonomy.c \
@@ -222,6 +223,7 @@ HEADERS += \
 	core/selection.h \
 	core/sha1.h \
 	core/strndup.h \
+	core/string-format.h \
 	core/subsurfacestartup.h \
 	core/subsurfacesysinfo.h \
 	core/taxonomy.h \
diff --git a/core/CMakeLists.txt b/core/CMakeLists.txt
index 1ed24019c..5680c5f6b 100644
--- a/core/CMakeLists.txt
+++ b/core/CMakeLists.txt
@@ -164,6 +164,8 @@ set(SUBSURFACE_CORE_LIB_SRCS
 	statistics.c
 	statistics.h
 	strndup.h
+	string-format.h
+	string-format.cpp
 	strtod.c
 	subsurface-string.h
 	subsurfacestartup.c
diff --git a/core/string-format.cpp b/core/string-format.cpp
new file mode 100644
index 000000000..331fb64ba
--- /dev/null
+++ b/core/string-format.cpp
@@ -0,0 +1,145 @@
+#include "string-format.h"
+#include "dive.h"
+#include "divesite.h"
+#include "qthelper.h"
+#include "subsurface-string.h"
+#include <QTextDocument>
+
+enum returnPressureSelector { START_PRESSURE, END_PRESSURE };
+
+static QString getPressures(const struct dive *dive, int i, enum returnPressureSelector ret)
+{
+	const cylinder_t *cyl = get_cylinder(dive, i);
+	QString fmt;
+	if (ret == START_PRESSURE) {
+		if (cyl->start.mbar)
+			fmt = get_pressure_string(cyl->start, true);
+		else if (cyl->sample_start.mbar)
+			fmt = get_pressure_string(cyl->sample_start, true);
+	}
+	if (ret == END_PRESSURE) {
+		if (cyl->end.mbar)
+			fmt = get_pressure_string(cyl->end, true);
+		else if(cyl->sample_end.mbar)
+			fmt = get_pressure_string(cyl->sample_end, true);
+	}
+	return fmt;
+}
+
+QString formatSac(const dive *d)
+{
+	if (!d->sac)
+		return QString();
+	const char *unit;
+	int decimal;
+	double value = get_volume_units(d->sac, &decimal, &unit);
+	return QString::number(value, 'f', decimal).append(unit);
+}
+
+QString formatNotes(const dive *d)
+{
+	QString tmp = d->notes ? QString::fromUtf8(d->notes) : QString();
+	if (is_dc_planner(&d->dc)) {
+		QTextDocument notes;
+	#define _NOTES_BR "&#92n"
+		tmp.replace("<thead>", "<thead>" _NOTES_BR)
+			.replace("<br>", "<br>" _NOTES_BR)
+			.replace("<br/>", "<br/>" _NOTES_BR)
+			.replace("<br />", "<br />" _NOTES_BR)
+			.replace("<tr>", "<tr>" _NOTES_BR)
+			.replace("</tr>", "</tr>" _NOTES_BR);
+		notes.setHtml(tmp);
+		tmp = notes.toPlainText();
+		tmp.replace(_NOTES_BR, "<br/>");
+	#undef _NOTES_BR
+	} else {
+		tmp.replace("\n", "<br/>");
+	}
+	return tmp;
+}
+
+QString format_gps_decimal(const dive *d)
+{
+	bool savep = prefs.coordinates_traditional;
+
+	prefs.coordinates_traditional = false;
+	QString val = d->dive_site ? printGPSCoords(&d->dive_site->location) : QString();
+	prefs.coordinates_traditional = savep;
+	return val;
+}
+
+QStringList formatGetCylinder(const dive *d)
+{
+	QStringList getCylinder;
+	for (int i = 0; i < d->cylinders.nr; i++) {
+		if (is_cylinder_used(d, i))
+			getCylinder << get_cylinder(d, i)->type.description;
+	}
+	return getCylinder;
+}
+
+QStringList formatStartPressure(const dive *d)
+{
+	QStringList startPressure;
+	for (int i = 0; i < d->cylinders.nr; i++) {
+		if (is_cylinder_used(d, i))
+			startPressure << getPressures(d, i, START_PRESSURE);
+	}
+	return startPressure;
+}
+
+QStringList formatEndPressure(const dive *d)
+{
+	QStringList endPressure;
+	for (int i = 0; i < d->cylinders.nr; i++) {
+		if (is_cylinder_used(d, i))
+			endPressure << getPressures(d, i, END_PRESSURE);
+	}
+	return endPressure;
+}
+
+QStringList formatFirstGas(const dive *d)
+{
+	QStringList gas;
+	for (int i = 0; i < d->cylinders.nr; i++) {
+		if (is_cylinder_used(d, i))
+			gas << get_gas_string(get_cylinder(d, i)->gasmix);
+	}
+	return gas;
+}
+
+// Add string to sorted QStringList, if it doesn't already exist and
+// it isn't the empty string.
+static void addStringToSortedList(QStringList &l, const char *s)
+{
+	if (empty_string(s))
+		return;
+
+	// Do a binary search for the string. lower_bound() returns an iterator
+	// to either the searched-for element or the next higher element if it
+	// doesn't exist.
+	QString qs(s);
+	auto it = std::lower_bound(l.begin(), l.end(), qs); // TODO: use locale-aware sorting
+	if (it != l.end() && *it == s)
+		return;
+
+	// Add new string at sorted position
+	l.insert(it, s);
+}
+
+QStringList formatFullCylinderList()
+{
+	QStringList cylinders;
+	struct dive *d;
+	int i = 0;
+	for_each_dive (i, d) {
+		for (int j = 0; j < d->cylinders.nr; j++)
+			addStringToSortedList(cylinders, get_cylinder(d, j)->type.description);
+	}
+
+	for (int ti = 0; ti < tank_info_table.nr; ti++)
+		addStringToSortedList(cylinders, tank_info_table.infos[ti].name);
+
+	return cylinders;
+}
+
diff --git a/core/string-format.h b/core/string-format.h
new file mode 100644
index 000000000..96a9638e4
--- /dev/null
+++ b/core/string-format.h
@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0
+// Various functions that format data into QStrings or QStringLists
+#ifndef STRING_FORMAT_H
+#define STRING_FORMAT_H
+
+#include <QStringList>
+
+struct dive;
+
+QString formatSac(const dive *d);
+QString formatNotes(const dive *d);
+QString format_gps_decimal(const dive *d);
+QStringList formatGetCylinder(const dive *d);
+QStringList formatStartPressure(const dive *d);
+QStringList formatEndPressure(const dive *d);
+QStringList formatFirstGas(const dive *d);
+QStringList formatFullCylinderList();
+
+#endif
diff --git a/core/subsurface-qt/diveobjecthelper.cpp b/core/subsurface-qt/diveobjecthelper.cpp
index 1fa91a301..8f081fa04 100644
--- a/core/subsurface-qt/diveobjecthelper.cpp
+++ b/core/subsurface-qt/diveobjecthelper.cpp
@@ -9,6 +9,7 @@
 #include "core/divesite.h"
 #include "core/trip.h"
 #include "core/subsurface-string.h"
+#include "core/string-format.h"
 #include "qt-models/tankinfomodel.h"
 
 #if defined(DEBUG_DOH)
@@ -19,8 +20,6 @@ static int callCounter = 0;
 #endif /* defined(DEBUG_DOH) */
 
 
-enum returnPressureSelector {START_PRESSURE, END_PRESSURE};
-
 static QString getFormattedWeight(const struct dive *dive, int idx)
 {
 	const weightsystem_t *weight = &dive->weightsystems.weightsystems[idx];
@@ -43,57 +42,6 @@ static QString getFormattedCylinder(const struct dive *dive, int idx)
 	return fmt;
 }
 
-static QString getPressures(const struct dive *dive, int i, enum returnPressureSelector ret)
-{
-	const cylinder_t *cyl = get_cylinder(dive, i);
-	QString fmt;
-	if (ret == START_PRESSURE) {
-		if (cyl->start.mbar)
-			fmt = get_pressure_string(cyl->start, true);
-		else if (cyl->sample_start.mbar)
-			fmt = get_pressure_string(cyl->sample_start, true);
-	}
-	if (ret == END_PRESSURE) {
-		if (cyl->end.mbar)
-			fmt = get_pressure_string(cyl->end, true);
-		else if(cyl->sample_end.mbar)
-			fmt = get_pressure_string(cyl->sample_end, true);
-	}
-	return fmt;
-}
-
-QString format_gps_decimal(const dive *d)
-{
-	bool savep = prefs.coordinates_traditional;
-
-	prefs.coordinates_traditional = false;
-	QString val = d->dive_site ? printGPSCoords(&d->dive_site->location) : QString();
-	prefs.coordinates_traditional = savep;
-	return val;
-}
-
-QString formatNotes(const dive *d)
-{
-	QString tmp = d->notes ? QString::fromUtf8(d->notes) : QString();
-	if (is_dc_planner(&d->dc)) {
-		QTextDocument notes;
-	#define _NOTES_BR "&#92n"
-		tmp.replace("<thead>", "<thead>" _NOTES_BR)
-			.replace("<br>", "<br>" _NOTES_BR)
-			.replace("<br/>", "<br/>" _NOTES_BR)
-			.replace("<br />", "<br />" _NOTES_BR)
-			.replace("<tr>", "<tr>" _NOTES_BR)
-			.replace("</tr>", "</tr>" _NOTES_BR);
-		notes.setHtml(tmp);
-		tmp = notes.toPlainText();
-		tmp.replace(_NOTES_BR, "<br/>");
-	#undef _NOTES_BR
-	} else {
-		tmp.replace("\n", "<br/>");
-	}
-	return tmp;
-}
-
 static QString formatGas(const dive *d)
 {
 	/*WARNING: here should be the gastlist, returned
@@ -117,16 +65,6 @@ static QString formatGas(const dive *d)
 	return gases;
 }
 
-QString formatSac(const dive *d)
-{
-	if (!d->sac)
-		return QString();
-	const char *unit;
-	int decimal;
-	double value = get_volume_units(d->sac, &decimal, &unit);
-	return QString::number(value, 'f', decimal).append(unit);
-}
-
 static QString formatWeightList(const dive *d)
 {
 	QString weights;
@@ -172,81 +110,6 @@ static QVector<CylinderObjectHelper> makeCylinderObjects(const dive *d)
 	return res;
 }
 
-QStringList formatGetCylinder(const dive *d)
-{
-	QStringList getCylinder;
-	for (int i = 0; i < d->cylinders.nr; i++) {
-		if (is_cylinder_used(d, i))
-			getCylinder << get_cylinder(d, i)->type.description;
-	}
-	return getCylinder;
-}
-
-QStringList getStartPressure(const dive *d)
-{
-	QStringList startPressure;
-	for (int i = 0; i < d->cylinders.nr; i++) {
-		if (is_cylinder_used(d, i))
-			startPressure << getPressures(d, i, START_PRESSURE);
-	}
-	return startPressure;
-}
-
-QStringList getEndPressure(const dive *d)
-{
-	QStringList endPressure;
-	for (int i = 0; i < d->cylinders.nr; i++) {
-		if (is_cylinder_used(d, i))
-			endPressure << getPressures(d, i, END_PRESSURE);
-	}
-	return endPressure;
-}
-
-QStringList getFirstGas(const dive *d)
-{
-	QStringList gas;
-	for (int i = 0; i < d->cylinders.nr; i++) {
-		if (is_cylinder_used(d, i))
-			gas << get_gas_string(get_cylinder(d, i)->gasmix);
-	}
-	return gas;
-}
-
-// Add string to sorted QStringList, if it doesn't already exist and
-// it isn't the empty string.
-static void addStringToSortedList(QStringList &l, const char *s)
-{
-	if (empty_string(s))
-		return;
-
-	// Do a binary search for the string. lower_bound() returns an iterator
-	// to either the searched-for element or the next higher element if it
-	// doesn't exist.
-	QString qs(s);
-	auto it = std::lower_bound(l.begin(), l.end(), qs); // TODO: use locale-aware sorting
-	if (it != l.end() && *it == s)
-		return;
-
-	// Add new string at sorted position
-	l.insert(it, s);
-}
-
-QStringList getFullCylinderList()
-{
-	QStringList cylinders;
-	struct dive *d;
-	int i = 0;
-	for_each_dive (i, d) {
-		for (int j = 0; j < d->cylinders.nr; j++)
-			addStringToSortedList(cylinders, get_cylinder(d, j)->type.description);
-	}
-
-	for (int ti = 0; ti < tank_info_table.nr; ti++)
-		addStringToSortedList(cylinders, tank_info_table.infos[ti].name);
-
-	return cylinders;
-}
-
 QString formatDiveSalinity(const dive *d)
 {
 	int salinity = get_dive_salinity(d);
@@ -299,9 +162,9 @@ DiveObjectHelper::DiveObjectHelper(const struct dive *d) :
 	otu(d->otu),
 	sumWeight(get_weight_string(weight_t { total_weight(d) }, true)),
 	getCylinder(formatGetCylinder(d)),
-	startPressure(getStartPressure(d)),
-	endPressure(getEndPressure(d)),
-	firstGas(getFirstGas(d)),
+	startPressure(formatStartPressure(d)),
+	endPressure(formatEndPressure(d)),
+	firstGas(formatFirstGas(d)),
 	salinity(formatDiveSalinity(d)),
 	waterType(formatDiveWaterType(d))
 {
@@ -342,5 +205,5 @@ QString DiveObjectHelper::time() const
 
 QStringList DiveObjectHelper::cylinderList() const
 {
-	return getFullCylinderList();
+	return formatFullCylinderList();
 }
diff --git a/qt-models/divetripmodel.cpp b/qt-models/divetripmodel.cpp
index 6b700a92e..52ad937f5 100644
--- a/qt-models/divetripmodel.cpp
+++ b/qt-models/divetripmodel.cpp
@@ -3,6 +3,7 @@
 #include "core/divefilter.h"
 #ifdef SUBSURFACE_MOBILE
 #include "qt-models/mobilelistmodel.h"
+#include "core/string-format.h"
 #endif
 #include "core/gettextfromc.h"
 #include "core/metrics.h"
@@ -225,11 +226,11 @@ QVariant DiveTripModelBase::diveData(const struct dive *d, int column, int role)
 	case MobileListModel::DiveSiteRole: return QVariant::fromValue(d->dive_site);
 	case MobileListModel::CylinderRole: return formatGetCylinder(d).join(", ");
 	case MobileListModel::GetCylinderRole: return formatGetCylinder(d);
-	case MobileListModel::CylinderListRole: return getFullCylinderList();
+	case MobileListModel::CylinderListRole: return formatFullCylinderList();
 	case MobileListModel::SingleWeightRole: return d->weightsystems.nr <= 1;
-	case MobileListModel::StartPressureRole: return getStartPressure(d);
-	case MobileListModel::EndPressureRole: return getEndPressure(d);
-	case MobileListModel::FirstGasRole: return getFirstGas(d);
+	case MobileListModel::StartPressureRole: return formatStartPressure(d);
+	case MobileListModel::EndPressureRole: return formatEndPressure(d);
+	case MobileListModel::FirstGasRole: return formatFirstGas(d);
 	case MobileListModel::SelectedRole: return d->selected;
 	case MobileListModel::DiveInTripRole: return d->divetrip != NULL;
 	case MobileListModel::IsInvalidRole: return d->invalid;
diff --git a/qt-models/mobilelistmodel.h b/qt-models/mobilelistmodel.h
index e18481efc..5c03a02a7 100644
--- a/qt-models/mobilelistmodel.h
+++ b/qt-models/mobilelistmodel.h
@@ -186,14 +186,4 @@ private:
 	MobileSwipeModel sm;
 };
 
-// Helper functions - these are actually defined in DiveObjectHelper.cpp. Why declare them here?
-QString formatSac(const dive *d);
-QString formatNotes(const dive *d);
-QString format_gps_decimal(const dive *d);
-QStringList formatGetCylinder(const dive *d);
-QStringList getStartPressure(const dive *d);
-QStringList getEndPressure(const dive *d);
-QStringList getFirstGas(const dive *d);
-QStringList getFullCylinderList();
-
 #endif