Separate tree and list sort orders

Implements the suggestion from https://github.com/htop-dev/htop/issues/399#issuecomment-747861013

Thanks to the refactors from 0bd5c8fb5da and 6393baa74e5, this was really easy
and clean to do.

It maintains the "Tree view always by PID" option in the Settings, which
results in some specific behaviors such as "clicking on the column header to
exit tree view" and "picking a new sort order to exit tree view", for the sake
of the muscle memory of long time htop users. :)

1 files changed, 14 insertions, 0 deletions

diff --git a/Settings.h b/Settings.h
index 41a60f59..35520638 100644
--- a/Settings.h
+++ b/Settings.h
@@ -33,7 +33,9 @@ typedef struct Settings_ {
    int delay;
 
    int direction;
+   int treeDirection;
    ProcessField sortKey;
+   ProcessField treeSortKey;
 
    bool countCPUsFromOne;
    bool detailedCPUTime;
@@ -71,6 +73,16 @@ typedef struct Settings_ {
 
 #define Settings_cpuId(settings, cpu) ((settings)->countCPUsFromOne ? (cpu)+1 : (cpu))
 
+static inline ProcessField Settings_getActiveSortKey(const Settings* this) {
+   return (this->treeView)
+          ? (this->treeViewAlwaysByPID ? PID : this->treeSortKey)
+          : this->sortKey;
+}
+
+static inline int Settings_getActiveDirection(const Settings* this) {
+   return this->treeView ? this->treeDirection : this->direction;
+}
+
 void Settings_delete(Settings* this);
 
 bool Settings_write(Settings* this);
@@ -79,4 +91,6 @@ Settings* Settings_new(int initialCpuCount);
 
 void Settings_invertSortOrder(Settings* this);
 
+void Settings_setSortKey(Settings* this, ProcessField sortKey);
+
 #endif