Address items from review

Process.c

@@ -6,7 +6,6 @@ Released under the GNU GPLv2, see the COPYING file
 in the source distribution for its full text.
 */
 
-
 #include "config.h" // IWYU pragma: keep
 
 #include "Process.h"
@@ -383,10 +382,10 @@ void Process_display(const Object* cast, RichString* out) {
    if (this->tag == true)
       RichString_setAttr(out, CRT_colors[PROCESS_TAG]);
    if (this->settings->highlightChanges) {
-      if (Process_isNew(this))
-         out->highlightAttr = CRT_colors[PROCESS_NEW];
       if (Process_isTomb(this))
          out->highlightAttr = CRT_colors[PROCESS_TOMB];
+      else if (Process_isNew(this))
+         out->highlightAttr = CRT_colors[PROCESS_NEW];
    }
    assert(out->chlen > 0);
 }
@@ -421,13 +420,14 @@ void Process_toggleTag(Process* this) {
 }
 
 bool Process_isNew(const Process* this) {
-   if (this->processList && this->processList->scanTs >= this->seenTs)
-      return (this->processList->scanTs - this->seenTs <= this->processList->settings->highlightDelaySecs);
+   assert(this->processList);
+   if (this->processList->scanTs >= this->seenTs)
+      return this->processList->scanTs - this->seenTs <= this->processList->settings->highlightDelaySecs;
    return false;
 }
 
 bool Process_isTomb(const Process* this) {
-    return (this->tombTs > 0);
+    return this->tombTs > 0;
 }
 
 bool Process_setPriority(Process* this, int priority) {

Process.h

@@ -9,8 +9,8 @@ in the source distribution for its full text.
 */
 
 #include <stdbool.h>
-#include <sys/types.h>
 #include <time.h>
+#include <sys/types.h>
 
 #include "Object.h"
 #include "RichString.h"
@@ -78,6 +78,7 @@ typedef struct Process_ {
    bool tag;
    bool showChildren;
    bool show;
+   bool wasShown;
    unsigned int pgrp;
    unsigned int session;
    unsigned int tty_nr;

ProcessList.c

@@ -14,6 +14,7 @@ in the source distribution for its full text.
 #include "CRT.h"
 #include "XUtils.h"
 
+
 ProcessList* ProcessList_init(ProcessList* this, const ObjectClass* klass, UsersTable* usersTable, Hashtable* pidMatchList, uid_t userId) {
    this->processes = Vector_new(klass, true, DEFAULT_SIZE);
    this->processTable = Hashtable_new(140, false);
@@ -306,6 +307,7 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
    for (int i = 0; i < Vector_size(this->processes); i++) {
       Process* p = (Process*) Vector_get(this->processes, i);
       p->updated = false;
+      p->wasShown = p->show;
       p->show = true;
    }
 
@@ -334,7 +336,7 @@ void ProcessList_scan(ProcessList* this, bool pauseProcessUpdate) {
          }
       } else if (p->updated == false) {
          // process no longer exists
-         if (this->settings->highlightChanges) {
+         if (this->settings->highlightChanges && p->wasShown) {
             // mark tombed
             p->tombTs = this->scanTs + this->settings->highlightDelaySecs;
          } else {

Settings.c

@@ -313,6 +313,7 @@ Settings* Settings_new(int initialCpuCount) {
    this->updateProcessNames = false;
    this->showProgramPath = true;
    this->highlightThreads = true;
+   this->highlightChanges = false;
    this->highlightDelaySecs = DEFAULT_HIGHLIGHT_SECS;
    #ifdef HAVE_LIBHWLOC
    this->topologyAffinity = false;

htop.c

@@ -50,14 +50,14 @@ static void printHelpFlag(void) {
          "-d --delay=DELAY                Set the delay between updates, in tenths of seconds\n"
          "-F --filter=FILTER              Show only the commands matching the given filter\n"
          "-h --help                       Print this help screen\n"
+         "-H --highlight-changes[=DELAY]  Highlight new and old processes\n"
          "-M --no-mouse                   Disable the mouse\n"
-         "-p --pid=PID,[,PID,PID...]      Show only the given PIDs\n"
+         "-p --pid=PID[,PID,PID...]       Show only the given PIDs\n"
          "-s --sort-key=COLUMN            Sort by COLUMN (try --sort-key=help for a list)\n"
          "-t --tree                       Show the tree view by default\n"
          "-u --user[=USERNAME]            Show only processes for a given user (or $USER)\n"
          "-U --no-unicode                 Do not use unicode but plain ASCII\n"
          "-V --version                    Print version info\n"
-         "-H --highlight-changes[=DELAY]  Highlight new and old processes\n"
          "\n"
          "Long options may be passed with a single dash.\n\n"
          "Press F1 inside htop for online help.\n"
@@ -212,7 +212,8 @@ static CommandLineSettings parseArguments(int argc, char** argv) {
             }
             if (delay) {
                 if (sscanf(delay, "%16d", &(flags.highlightDelaySecs)) == 1) {
-                   if (flags.highlightDelaySecs < 1) flags.highlightDelaySecs = 1;
+                   if (flags.highlightDelaySecs < 1)
+                      flags.highlightDelaySecs = 1;
                 } else {
                    fprintf(stderr, "Error: invalid highlight delay value \"%s\".\n", delay);
                    exit(1);