Add combined memory and swap meter

Closes: #699

Makefile.am

@@ -52,6 +52,7 @@ myhtopsources = \
 	LoadAverageMeter.c \
 	MainPanel.c \
 	MemoryMeter.c \
+	MemorySwapMeter.c \
 	Meter.c \
 	MetersPanel.c \
 	NetworkIOMeter.c \
@@ -109,6 +110,7 @@ myhtopheaders = \
 	Macros.h \
 	MainPanel.h \
 	MemoryMeter.h \
+	MemorySwapMeter.h \
 	Meter.h \
 	MetersPanel.h \
 	NetworkIOMeter.h \

MemorySwapMeter.c

@@ -0,0 +1,104 @@
+/*
+htop - MemorySwapMeter.c
+(C) 2021 htop dev team
+Released under the GNU GPLv2, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "MemorySwapMeter.h"
+
+#include <math.h>
+#include <stddef.h>
+
+#include "CRT.h"
+#include "MemoryMeter.h"
+#include "Object.h"
+#include "Platform.h"
+#include "RichString.h"
+#include "SwapMeter.h"
+
+
+typedef struct MemorySwapMeterData_ {
+   Meter* memoryMeter;
+   Meter* swapMeter;
+} MemorySwapMeterData;
+
+static void MemorySwapMeter_updateValues(Meter* this) {
+   MemorySwapMeterData* data = this->meterData;
+
+   Meter_updateValues(data->memoryMeter);
+   Meter_updateValues(data->swapMeter);
+}
+
+static void MemorySwapMeter_draw(Meter* this, int x, int y, int w) {
+   MemorySwapMeterData* data = this->meterData;
+
+   int colwidth = (w - 2) / 2 + 1;
+
+   assert(data->memoryMeter->draw);
+   data->memoryMeter->draw(data->memoryMeter, x, y, colwidth);
+   assert(data->swapMeter->draw);
+   data->swapMeter->draw(data->swapMeter, x + w / 2, y, colwidth);
+}
+
+static void MemorySwapMeter_init(Meter* this) {
+   MemorySwapMeterData* data = this->meterData;
+
+   if (!data) {
+      data = this->meterData = xMalloc(sizeof(MemorySwapMeterData));
+      data->memoryMeter = NULL;
+      data->swapMeter = NULL;
+   }
+
+   if (!data->memoryMeter)
+      data->memoryMeter = Meter_new(this->pl, 0, (const MeterClass*) Class(MemoryMeter));
+   if (!data->swapMeter)
+      data->swapMeter = Meter_new(this->pl, 0, (const MeterClass*) Class(SwapMeter));
+
+   if (Meter_initFn(data->memoryMeter))
+      Meter_init(data->memoryMeter);
+   if (Meter_initFn(data->swapMeter))
+      Meter_init(data->swapMeter);
+
+   if (this->mode == 0)
+      this->mode = BAR_METERMODE;
+
+   this->h = MAXIMUM(Meter_modes[data->memoryMeter->mode]->h, Meter_modes[data->swapMeter->mode]->h);
+}
+
+static void MemorySwapMeter_updateMode(Meter* this, int mode) {
+   MemorySwapMeterData* data = this->meterData;
+
+   this->mode = mode;
+
+   Meter_setMode(data->memoryMeter, mode);
+   Meter_setMode(data->swapMeter, mode);
+
+   this->h = MAXIMUM(Meter_modes[data->memoryMeter->mode]->h, Meter_modes[data->swapMeter->mode]->h);
+}
+
+static void MemorySwapMeter_done(Meter* this) {
+   MemorySwapMeterData* data = this->meterData;
+
+   Meter_delete((Object*)data->swapMeter);
+   Meter_delete((Object*)data->memoryMeter);
+
+   free(data);
+}
+
+const MeterClass MemorySwapMeter_class = {
+   .super = {
+      .extends = Class(Meter),
+      .delete = Meter_delete,
+   },
+   .updateValues = MemorySwapMeter_updateValues,
+   .defaultMode = CUSTOM_METERMODE,
+   .name = "MemorySwap",
+   .uiName = "Memory & Swap",
+   .description = "Combined memory and swap usage",
+   .caption = "M&S",
+   .draw = MemorySwapMeter_draw,
+   .init = MemorySwapMeter_init,
+   .updateMode = MemorySwapMeter_updateMode,
+   .done = MemorySwapMeter_done
+};

MemorySwapMeter.h

@@ -0,0 +1,15 @@
+#ifndef HEADER_MemorySwapMeter
+#define HEADER_MemorySwapMeter
+/*
+htop - MemorySwapMeter.h
+(C) 2021 htop dev team
+Released under the GNU GPLv2, see the COPYING file
+in the source distribution for its full text.
+*/
+
+#include "Meter.h"
+
+
+extern const MeterClass MemorySwapMeter_class;
+
+#endif

darwin/Platform.c

@@ -28,6 +28,7 @@ in the source distribution for its full text.
 #include "LoadAverageMeter.h"
 #include "Macros.h"
 #include "MemoryMeter.h"
+#include "MemorySwapMeter.h"
 #include "ProcessLocksScreen.h"
 #include "SwapMeter.h"
 #include "SysArchMeter.h"
@@ -95,6 +96,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &LoadMeter_class,
    &MemoryMeter_class,
    &SwapMeter_class,
+   &MemorySwapMeter_class,
    &TasksMeter_class,
    &BatteryMeter_class,
    &HostnameMeter_class,

dragonflybsd/Platform.c

@@ -23,6 +23,7 @@ in the source distribution for its full text.
 #include "HostnameMeter.h"
 #include "LoadAverageMeter.h"
 #include "MemoryMeter.h"
+#include "MemorySwapMeter.h"
 #include "ProcessList.h"
 #include "SwapMeter.h"
 #include "SysArchMeter.h"
@@ -81,6 +82,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &LoadAverageMeter_class,
    &LoadMeter_class,
    &MemoryMeter_class,
+   &MemorySwapMeter_class,
    &SwapMeter_class,
    &TasksMeter_class,
    &UptimeMeter_class,

freebsd/Platform.c

@@ -35,6 +35,7 @@ in the source distribution for its full text.
 #include "LoadAverageMeter.h"
 #include "Macros.h"
 #include "MemoryMeter.h"
+#include "MemorySwapMeter.h"
 #include "Meter.h"
 #include "NetworkIOMeter.h"
 #include "ProcessList.h"
@@ -100,6 +101,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &LoadMeter_class,
    &MemoryMeter_class,
    &SwapMeter_class,
+   &MemorySwapMeter_class,
    &TasksMeter_class,
    &UptimeMeter_class,
    &BatteryMeter_class,

linux/Platform.c

@@ -36,6 +36,7 @@ in the source distribution for its full text.
 #include "MainPanel.h"
 #include "Meter.h"
 #include "MemoryMeter.h"
+#include "MemorySwapMeter.h"
 #include "NetworkIOMeter.h"
 #include "Object.h"
 #include "Panel.h"
@@ -195,6 +196,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &LoadMeter_class,
    &MemoryMeter_class,
    &SwapMeter_class,
+   &MemorySwapMeter_class,
    &SysArchMeter_class,
    &HugePageMeter_class,
    &TasksMeter_class,

netbsd/Platform.c

@@ -42,6 +42,7 @@ in the source distribution for its full text.
 #include "LoadAverageMeter.h"
 #include "Macros.h"
 #include "MemoryMeter.h"
+#include "MemorySwapMeter.h"
 #include "Meter.h"
 #include "ProcessList.h"
 #include "Settings.h"
@@ -149,6 +150,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &LoadMeter_class,
    &MemoryMeter_class,
    &SwapMeter_class,
+   &MemorySwapMeter_class,
    &TasksMeter_class,
    &UptimeMeter_class,
    &BatteryMeter_class,

openbsd/Platform.c

@@ -32,6 +32,7 @@ in the source distribution for its full text.
 #include "LoadAverageMeter.h"
 #include "Macros.h"
 #include "MemoryMeter.h"
+#include "MemorySwapMeter.h"
 #include "Meter.h"
 #include "ProcessList.h"
 #include "Settings.h"
@@ -98,6 +99,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &LoadMeter_class,
    &MemoryMeter_class,
    &SwapMeter_class,
+   &MemorySwapMeter_class,
    &TasksMeter_class,
    &UptimeMeter_class,
    &BatteryMeter_class,

pcp/Platform.c

@@ -29,6 +29,7 @@ in the source distribution for its full text.
 #include "LoadAverageMeter.h"
 #include "Macros.h"
 #include "MemoryMeter.h"
+#include "MemorySwapMeter.h"
 #include "Meter.h"
 #include "NetworkIOMeter.h"
 #include "ProcessList.h"
@@ -73,6 +74,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &LoadMeter_class,
    &MemoryMeter_class,
    &SwapMeter_class,
+   &MemorySwapMeter_class,
    &TasksMeter_class,
    &UptimeMeter_class,
    &BatteryMeter_class,

solaris/Platform.c

@@ -24,6 +24,7 @@ in the source distribution for its full text.
 #include "Meter.h"
 #include "CPUMeter.h"
 #include "MemoryMeter.h"
+#include "MemorySwapMeter.h"
 #include "SwapMeter.h"
 #include "TasksMeter.h"
 #include "LoadAverageMeter.h"
@@ -97,6 +98,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &LoadMeter_class,
    &MemoryMeter_class,
    &SwapMeter_class,
+   &MemorySwapMeter_class,
    &TasksMeter_class,
    &BatteryMeter_class,
    &HostnameMeter_class,

unsupported/Platform.c

@@ -20,6 +20,7 @@ in the source distribution for its full text.
 #include "LoadAverageMeter.h"
 #include "Macros.h"
 #include "MemoryMeter.h"
+#include "MemorySwapMeter.h"
 #include "SwapMeter.h"
 #include "SysArchMeter.h"
 #include "TasksMeter.h"
@@ -43,6 +44,7 @@ const MeterClass* const Platform_meterTypes[] = {
    &LoadMeter_class,
    &MemoryMeter_class,
    &SwapMeter_class,
+   &MemorySwapMeter_class,
    &TasksMeter_class,
    &BatteryMeter_class,
    &HostnameMeter_class,