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.

1 files changed, 47 insertions, 5 deletions

diff --git a/Machine.c b/Machine.c
index 63a996ef..8846aed7 100644
--- a/Machine.c
+++ b/Machine.c
@@ -15,6 +15,7 @@ in the source distribution for its full text.
 #include "Hashtable.h"
 #include "Macros.h"
 #include "Platform.h"
+#include "Row.h"
 #include "XUtils.h"
 
 
@@ -22,6 +23,11 @@ void Machine_init(Machine* this, UsersTable* usersTable, uid_t userId) {
    this->usersTable = usersTable;
    this->userId = userId;
 
+   this->htopUserId = getuid();
+
+   // discover fixed column width limits
+   Row_setPidColumnWidth(Platform_getMaxPid());
+
    // always maintain valid realtime timestamps
    Platform_gettime_realtime(&this->realtime, &this->realtimeMs);
 
@@ -49,12 +55,48 @@ void Machine_done(Machine* this) {
    if (this->topologyOk) {
       hwloc_topology_destroy(this->topology);
    }
-#else
-   (void)this;
 #endif
+   for (size_t i = 0; i < this->tableCount; i++) {
+      Object_delete(&this->tables[i]->super);
+   }
 }
 
-void Machine_addList(Machine* this, struct ProcessList_ *pl) {
-   // currently only process lists are supported
-   this->pl = pl;
+void Machine_addTable(Machine* this, Table* table, bool processes) {
+   if (processes)
+      this->processTable = table;
+   this->activeTable = table;
+
+   size_t nmemb = this->tableCount + 1;
+   Table** tables = xReallocArray(this->tables, nmemb, sizeof(Table*));
+   tables[nmemb - 1] = table;
+   this->tables = tables;
+   this->tableCount++;
+}
+
+void Machine_scanTables(Machine* this) {
+   // set scan timestamp
+   static bool firstScanDone = false;
+
+   if (firstScanDone)
+      Platform_gettime_monotonic(&this->monotonicMs);
+   else
+      firstScanDone = true;
+
+   this->maxUserId = 0;
+   Row_resetFieldWidths();
+
+   for (size_t i = 0; i < this->tableCount; i++) {
+      Table* table = this->tables[i];
+
+      // pre-processing of each row
+      Table_scanPrepare(table);
+
+      // scan values for this table
+      Table_scanIterate(table);
+
+      // post-process after scanning
+      Table_scanCleanup(table);
+   }
+
+   Row_setUidColumnWidth(this->maxUserId);
 }