Introduce Row and Table classes for screens beyond top-processes

This commit refactors the Process and ProcessList structures such
they each have a new parent - Row and Table, respectively.  These
new classes handle screen updates relating to anything that could
be represented in tabular format, e.g. cgroups, filesystems, etc,
without us having to reimplement the display logic repeatedly for
each new entity.

2 files changed, 27 insertions, 21 deletions

diff --git a/freebsd/FreeBSDProcess.c b/freebsd/FreeBSDProcess.c
index 4970ff2c..f6d3451d 100644
--- a/freebsd/FreeBSDProcess.c
+++ b/freebsd/FreeBSDProcess.c
@@ -71,8 +71,8 @@ void Process_delete(Object* cast) {
    free(this);
 }
 
-static void FreeBSDProcess_writeField(const Process* this, RichString* str, ProcessField field) {
-   const FreeBSDProcess* fp = (const FreeBSDProcess*) this;
+static void FreeBSDProcess_rowWriteField(const Row* super, RichString* str, ProcessField field) {
+   const FreeBSDProcess* fp = (const FreeBSDProcess*) super;
    char buffer[256];
    size_t n = sizeof(buffer);
    int attr = CRT_colors[DEFAULT_COLOR];
@@ -81,13 +81,13 @@ static void FreeBSDProcess_writeField(const Process* this, RichString* str, Proc
    // add FreeBSD-specific fields here
    case JID: xSnprintf(buffer, n, "%*d ", Process_pidDigits, fp->jid); break;
    case JAIL:
-      Process_printLeftAlignedField(str, attr, fp->jname ? fp->jname : "N/A", 11);
+      Row_printLeftAlignedField(str, attr, fp->jname ? fp->jname : "N/A", 11);
       return;
    case EMULATION:
-      Process_printLeftAlignedField(str, attr, fp->emul ? fp->emul : "N/A", 16);
+      Row_printLeftAlignedField(str, attr, fp->emul ? fp->emul : "N/A", 16);
       return;
    default:
-      Process_writeField(this, str, field);
+      Process_writeField(&fp->super, str, field);
       return;
    }
    RichString_appendWide(str, attr, buffer);
@@ -112,11 +112,18 @@ static int FreeBSDProcess_compareByKey(const Process* v1, const Process* v2, Pro
 
 const ProcessClass FreeBSDProcess_class = {
    .super = {
-      .extends = Class(Process),
-      .display = Process_display,
-      .delete = Process_delete,
-      .compare = Process_compare
+      .super = {
+         .extends = Class(Process),
+         .display = Row_display,
+         .delete = Process_delete,
+         .compare = Process_compare
+      },
+      .isHighlighted = Process_rowIsHighlighted,
+      .isVisible = Process_rowIsVisible,
+      .matchesFilter = Process_rowMatchesFilter,
+      .compareByParent = Process_compareByParent,
+      .sortKeyString = Process_rowGetSortKey,
+      .writeField = FreeBSDProcess_rowWriteField
    },
-   .writeField = FreeBSDProcess_writeField,
    .compareByKey = FreeBSDProcess_compareByKey
 };
diff --git a/freebsd/FreeBSDProcessList.c b/freebsd/FreeBSDProcessList.c
index d8d4bbe0..aabb61cc 100644
--- a/freebsd/FreeBSDProcessList.c
+++ b/freebsd/FreeBSDProcessList.c
@@ -43,18 +43,17 @@ in the source distribution for its full text.
 
 ProcessList* ProcessList_new(Machine* host, Hashtable* pidMatchList) {
    FreeBSDProcessList* this = xCalloc(1, sizeof(FreeBSDProcessList));
-   ProcessList* super = &this->super;
+   Object_setClass(this, Class(ProcessList));
 
+   ProcessList* super = &this->super;
    ProcessList_init(super, Class(FreeBSDProcess), host, pidMatchList);
 
    return super;
 }
 
-void ProcessList_delete(ProcessList* super) {
-   FreeBSDProcessList* this = (FreeBSDProcessList*) super;
-
-   ProcessList_done(super);
-
+void ProcessList_delete(Object* cast) {
+   FreeBSDProcessList* this = (FreeBSDProcessList*) cast;
+   ProcessList_done(&this->super);
    free(this);
 }
 
@@ -174,12 +173,12 @@ void ProcessList_goThroughEntries(ProcessList* super) {
 
       if (!preExisting) {
          fp->jid = kproc->ki_jid;
-         proc->pid = kproc->ki_pid;
+         Process_setPid(proc, kproc->ki_pid);
+         Process_setThreadGroup(proc, kproc->ki_pid);
+         Process_setParent(proc, kproc->ki_ppid);
          proc->isKernelThread = kproc->ki_pid != 1 && (kproc->ki_flag & P_SYSTEM);
          proc->isUserlandThread = false;
-         proc->ppid = kproc->ki_ppid;
          proc->tpgid = kproc->ki_tpgid;
-         proc->tgid = kproc->ki_pid;
          proc->session = kproc->ki_sid;
          proc->pgrp = kproc->ki_pgid;
          proc->st_uid = kproc->ki_uid;
@@ -279,11 +278,11 @@ void ProcessList_goThroughEntries(ProcessList* super) {
          Scheduling_readProcessPolicy(proc);
 #endif
 
-      proc->show = ! ((hideKernelThreads && Process_isKernelThread(proc)) || (hideUserlandThreads && Process_isUserlandThread(proc)));
+      proc->super.show = ! ((hideKernelThreads && Process_isKernelThread(proc)) || (hideUserlandThreads && Process_isUserlandThread(proc)));
 
       super->totalTasks++;
       if (proc->state == RUNNING)
          super->runningTasks++;
-      proc->updated = true;
+      proc->super.updated = true;
    }
 }