Introduce screen tabs

Action.c

@@ -26,6 +26,7 @@ in the source distribution for its full text.
 #include <math.h>
 #include <pwd.h>
 #include <stdlib.h>
+#include <string.h>
 #include <stdbool.h>
 #include <sys/param.h>
 #include <sys/time.h>
@@ -80,7 +81,7 @@ Object* Action_pickFromVector(State* st, Panel* list, int x) {
       header->pl->following = pid;
       unfollow = true;
    }
-   ScreenManager_run(scr, &panelFocus, &ch);
+   ScreenManager_run(scr, &panelFocus, &ch, NULL);
    if (unfollow) {
       header->pl->following = -1;
    }
@@ -106,7 +107,7 @@ static void Action_runSetup(Settings* settings, const Header* header, ProcessLis
    CategoriesPanel_makeMetersPage(panelCategories);
    Panel* panelFocus;
    int ch;
-   ScreenManager_run(scr, &panelFocus, &ch);
+   ScreenManager_run(scr, &panelFocus, &ch, "Setup");
    ScreenManager_delete(scr);
    if (settings->changed) {
       Header_writeBackToSettings(header);
@@ -307,14 +308,33 @@ static Htop_Reaction actionNextScreen(State* st) {
 
 static Htop_Reaction actionPrevScreen(State* st) {
    Settings* settings = st->settings;
-   settings->ssIndex--;
-   if (settings->ssIndex == -1) {
+   if (settings->ssIndex == 0) {
       settings->ssIndex = settings->nScreens - 1;
+   } else {
+      settings->ssIndex--;
    }
    settings->ss = settings->screens[settings->ssIndex];
    return HTOP_REFRESH;
 }
 
+Htop_Reaction Action_setScreenTab(Settings* settings, int x) {
+   int s = 2;
+   for (unsigned int i = 0; i < settings->nScreens; i++) {
+      if (x < s) {
+         return 0;
+      }
+      const char* name = settings->screens[i]->name;
+      int len = strlen(name);
+      if (x <= s + len + 1) {
+         settings->ssIndex = i;
+         settings->ss = settings->screens[i];
+         return HTOP_REFRESH;
+      }
+      s += len + 3;
+   }
+   return 0;
+}
+
 static Htop_Reaction actionSetAffinity(State* st) {
    if (st->pl->cpuCount == 1)
       return HTOP_OK;

Action.h

@@ -49,6 +49,8 @@ Htop_Reaction Action_setSortKey(Settings* settings, ProcessField sortKey);
 
 // ----------------------------------------
 
+Htop_Reaction Action_setScreenTab(Settings* settings, int x);
+
 Htop_Reaction Action_follow(State* st);
 
 

CRT.c

@@ -130,6 +130,10 @@ typedef enum ColorElements_ {
    CPU_STEAL,
    CPU_GUEST,
    PANEL_EDIT,
+   SCREENS_OTH_BORDER,
+   SCREENS_OTH_TEXT,
+   SCREENS_CUR_BORDER,
+   SCREENS_CUR_TEXT,
    LAST_COLORELEMENT
 } ColorElements;
 
@@ -235,6 +239,10 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_STEAL] = ColorPair(Cyan,Black),
       [CPU_GUEST] = ColorPair(Cyan,Black),
       [PANEL_EDIT] = ColorPair(White,Blue),
+      [SCREENS_OTH_BORDER] = ColorPair(Blue,Blue),
+      [SCREENS_OTH_TEXT] = ColorPair(Black,Blue),
+      [SCREENS_CUR_BORDER] = ColorPair(Green,Green),
+      [SCREENS_CUR_TEXT] = ColorPair(Black,Green),
    },
    [COLORSCHEME_MONOCHROME] = {
       [RESET_COLOR] = A_NORMAL,
@@ -295,6 +303,10 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_STEAL] = A_REVERSE,
       [CPU_GUEST] = A_REVERSE,
       [PANEL_EDIT] = A_BOLD,
+      [SCREENS_OTH_BORDER] = A_DIM,
+      [SCREENS_OTH_TEXT] = A_DIM,
+      [SCREENS_CUR_BORDER] = A_REVERSE,
+      [SCREENS_CUR_TEXT] = A_REVERSE,
    },
    [COLORSCHEME_BLACKONWHITE] = {
       [RESET_COLOR] = ColorPair(Black,White),
@@ -355,6 +367,10 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_STEAL] = ColorPair(Cyan,White),
       [CPU_GUEST] = ColorPair(Cyan,White),
       [PANEL_EDIT] = ColorPair(White,Blue),
+      [SCREENS_OTH_BORDER] = A_BOLD | ColorPair(Black,White),
+      [SCREENS_OTH_TEXT] = A_BOLD | ColorPair(Black,White),
+      [SCREENS_CUR_BORDER] = ColorPair(Green,Green),
+      [SCREENS_CUR_TEXT] = ColorPair(Black,Green),
    },
    [COLORSCHEME_LIGHTTERMINAL] = {
       [RESET_COLOR] = ColorPair(Black,Black),
@@ -415,6 +431,10 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_STEAL] = ColorPair(Black,Black),
       [CPU_GUEST] = ColorPair(Black,Black),
       [PANEL_EDIT] = ColorPair(White,Blue),
+      [SCREENS_OTH_BORDER] = ColorPair(Blue,Black),
+      [SCREENS_OTH_TEXT] = ColorPair(Blue,Black),
+      [SCREENS_CUR_BORDER] = ColorPair(Green,Green),
+      [SCREENS_CUR_TEXT] = ColorPair(Black,Green),
    },
    [COLORSCHEME_MIDNIGHT] = {
       [RESET_COLOR] = ColorPair(White,Blue),
@@ -475,6 +495,10 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_STEAL] = ColorPair(White,Blue),
       [CPU_GUEST] = ColorPair(White,Blue),
       [PANEL_EDIT] = ColorPair(White,Blue),
+      [SCREENS_OTH_BORDER] = A_BOLD | ColorPair(Yellow,Blue),
+      [SCREENS_OTH_TEXT] = ColorPair(Cyan,Blue),
+      [SCREENS_CUR_BORDER] = ColorPair(Cyan,Cyan),
+      [SCREENS_CUR_TEXT] = ColorPair(Black,Cyan),
    },
    [COLORSCHEME_BLACKNIGHT] = {
       [RESET_COLOR] = ColorPair(Cyan,Black),
@@ -535,6 +559,10 @@ int CRT_colorSchemes[LAST_COLORSCHEME][LAST_COLORELEMENT] = {
       [CPU_STEAL] = ColorPair(Cyan,Black),
       [CPU_GUEST] = ColorPair(Cyan,Black),
       [PANEL_EDIT] = ColorPair(White,Cyan),
+      [SCREENS_OTH_BORDER] = ColorPair(White,Black),
+      [SCREENS_OTH_TEXT] = ColorPair(Cyan,Black),
+      [SCREENS_CUR_BORDER] = A_BOLD | ColorPair(White,Black),
+      [SCREENS_CUR_TEXT] = A_BOLD | ColorPair(Green,Black),
    },
    [COLORSCHEME_BROKENGRAY] = { 0 } // dynamically generated.
 };

CRT.h

@@ -118,6 +118,10 @@ typedef enum ColorElements_ {
    CPU_STEAL,
    CPU_GUEST,
    PANEL_EDIT,
+   SCREENS_OTH_BORDER,
+   SCREENS_OTH_TEXT,
+   SCREENS_CUR_BORDER,
+   SCREENS_CUR_TEXT,
    LAST_COLORELEMENT
 } ColorElements;
 

CategoriesPanel.c

@@ -145,7 +145,7 @@ CategoriesPanel* CategoriesPanel_new(ScreenManager* scr, Settings* settings, Hea
    this->settings = settings;
    this->header = header;
    this->pl = pl;
-   Panel_setHeader(super, "Setup");
+   Panel_setHeader(super, "Categories");
    Panel_add(super, (Object*) ListItem_new("Meters", 0));
    Panel_add(super, (Object*) ListItem_new("Display options", 0));
    Panel_add(super, (Object*) ListItem_new("Colors", 0));

DisplayOptionsPanel.c

@@ -96,5 +96,6 @@ DisplayOptionsPanel* DisplayOptionsPanel_new(Settings* settings, ScreenManager*
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Count CPUs from 0 instead of 1"), &(settings->countCPUsFromZero)));
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Update process names on every refresh"), &(settings->updateProcessNames)));
    Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Add guest time in CPU meter percentage"), &(settings->accountGuestInCPUMeter)));
+   Panel_add(super, (Object*) CheckItem_newByRef(xStrdup("Show tabs for screens"), &(settings->screenTabs)));
    return this;
 }

Header.c

@@ -211,6 +211,9 @@ int Header_calculateHeight(Header* this) {
       }
       maxHeight = MAX(maxHeight, height);
    }
+   if (this->settings->screenTabs) {
+      maxHeight++;
+   }
    this->height = maxHeight;
    this->pad = pad;
    return maxHeight;

MainPanel.c

@@ -88,6 +88,10 @@ static HandlerResult MainPanel_eventHandler(Panel* super, int ch) {
       }
       reaction |= HTOP_RECALCULATE | HTOP_REDRAW_BAR | HTOP_SAVE_SETTINGS; 
       result = HANDLED;
+   } else if (EVENT_IS_SCREEN_TAB_CLICK(ch)) {
+      int x = EVENT_SCREEN_TAB_GET_X(ch);
+      reaction |= Action_setScreenTab(settings, x);
+      result = HANDLED;
    } else if (ch != ERR && this->inc->active) {
       bool filterChanged = IncSet_handleKey(this->inc, ch, super, (IncMode_GetPanelValue) MainPanel_getValue, NULL);
       if (filterChanged) {

Panel.c

@@ -40,8 +40,12 @@ typedef enum HandlerResult_ {
 #define EVENT_SET_SELECTED -1
 
 #define EVENT_HEADER_CLICK(x_) (-10000 + x_)
-#define EVENT_IS_HEADER_CLICK(ev_) (ev_ >= -10000 && ev_ <= -9000)
 #define EVENT_HEADER_CLICK_GET_X(ev_) (ev_ + 10000)
+#define EVENT_IS_HEADER_CLICK(ev_) (ev_ >= -10000 && ev_ < -9000)
+
+#define EVENT_SCREEN_TAB_CLICK(x_) (-20000 + x_)
+#define EVENT_SCREEN_TAB_GET_X(ev_) (ev_ + 20000)
+#define EVENT_IS_SCREEN_TAB_CLICK(ev_) (ev_ >= -20000 && ev_ < -10000)
 
 typedef HandlerResult(*Panel_EventHandler)(Panel*, int);
 

Panel.h

@@ -29,8 +29,12 @@ typedef enum HandlerResult_ {
 #define EVENT_SET_SELECTED -1
 
 #define EVENT_HEADER_CLICK(x_) (-10000 + x_)
-#define EVENT_IS_HEADER_CLICK(ev_) (ev_ >= -10000 && ev_ <= -9000)
 #define EVENT_HEADER_CLICK_GET_X(ev_) (ev_ + 10000)
+#define EVENT_IS_HEADER_CLICK(ev_) (ev_ >= -10000 && ev_ < -9000)
+
+#define EVENT_SCREEN_TAB_CLICK(x_) (-20000 + x_)
+#define EVENT_SCREEN_TAB_GET_X(ev_) (ev_ + 20000)
+#define EVENT_IS_SCREEN_TAB_CLICK(ev_) (ev_ >= -20000 && ev_ < -10000)
 
 typedef HandlerResult(*Panel_EventHandler)(Panel*, int);
 

ScreenManager.c

@@ -13,6 +13,7 @@ in the source distribution for its full text.
 
 #include <assert.h>
 #include <time.h>
+#include <string.h>
 #include <stdlib.h>
 #include <stdbool.h>
 
@@ -35,6 +36,7 @@ typedef struct ScreenManager_ {
    int y2;
    Orientation orientation;
    Vector* panels;
+   const char* name;
    int panelCount;
    const Header* header;
    const Settings* settings;
@@ -160,7 +162,50 @@ static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTi
    *rescan = false;
 }
 
+static inline bool drawTab(int* y, int* x, int l, const char* name, bool cur) {
+   attrset(CRT_colors[cur ? SCREENS_CUR_BORDER : SCREENS_OTH_BORDER]);
+   mvaddch(*y, *x, '[');
+   (*x)++;
+   if (*x >= l) return false;
+   int nameLen = strlen(name);
+   int n = MIN(l - *x, nameLen);
+   attrset(CRT_colors[cur ? SCREENS_CUR_TEXT : SCREENS_OTH_TEXT]);
+   mvaddnstr(*y, *x, name, n);
+   *x += n;
+   if (*x >= l) return false;
+   attrset(CRT_colors[cur ? SCREENS_CUR_BORDER : SCREENS_OTH_BORDER]);
+   mvaddch(*y, *x, ']');
+   *x += 2;
+   if (*x >= l) return false;
+   return true;
+}
+
+static void ScreenManager_drawScreenTabs(ScreenManager* this) {
+   ScreenSettings** screens = this->settings->screens;
+   int cur = this->settings->ssIndex;
+   int l = COLS;
+   Panel* panel = (Panel*) Vector_get(this->panels, 0);
+   int y = panel->y - 1;
+   int x = 2;
+   
+   if (this->name) {
+      drawTab(&y, &x, l, this->name, true);
+      return;
+   }
+   
+   for (int s = 0; screens[s]; s++) {
+      bool ok = drawTab(&y, &x, l, screens[s]->name, s == cur);
+      if (!ok) {
+         break;
+      }
+   }
+   attrset(CRT_colors[RESET_COLOR]);
+}
+
 static void ScreenManager_drawPanels(ScreenManager* this, int focus) {
+   if (this->settings->screenTabs) {
+      ScreenManager_drawScreenTabs(this);
+   }
    int nPanels = this->panelCount;
    for (int i = 0; i < nPanels; i++) {
       Panel* panel = (Panel*) Vector_get(this->panels, i);
@@ -179,7 +224,7 @@ static Panel* setCurrentPanel(ScreenManager* this, int focus) {
    return panel;
 }
 
-void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
+void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey, char* name) {
    bool quit = false;
    int focus = 0;
    
@@ -195,6 +240,8 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
    bool rescan = false;
    int sortTimeout = 0;
    int resetSortTimeout = 5;
+   
+   this->name = name;
 
    while (!quit) {
       if (this->header) {
@@ -224,6 +271,9 @@ void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey) {
                         if (mevent.y == panel->y) {
                            ch = EVENT_HEADER_CLICK(mevent.x - panel->x);
                            break;
+                        } else if (this->settings->screenTabs && mevent.y == panel->y - 1) {
+                           ch = EVENT_SCREEN_TAB_CLICK(mevent.x);
+                           break;
                         } else if (mevent.y > panel->y && mevent.y <= panel->y+panel->h) {
                            ch = KEY_MOUSE;
                            if (panel == panelFocus || this->allowFocusChange) {

ScreenManager.h

@@ -27,6 +27,7 @@ typedef struct ScreenManager_ {
    int y2;
    Orientation orientation;
    Vector* panels;
+   const char* name;
    int panelCount;
    const Header* header;
    const Settings* settings;
@@ -49,6 +50,6 @@ Panel* ScreenManager_remove(ScreenManager* this, int idx);
 
 void ScreenManager_resize(ScreenManager* this, int x1, int y1, int x2, int y2);
 
-void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey);
+void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey, char* name);
 
 #endif

ScreensPanel.c

@@ -149,6 +149,7 @@ static void rebuildSettingsArray(Panel* super) {
       ScreenListItem* item = (ScreenListItem*) Panel_get(super, i);
       this->settings->screens[i] = item->ss;
    }
+   this->settings->nScreens = n;
 }
 
 static void addNewScreen(Panel* super) {

Settings.c

@@ -73,6 +73,7 @@ typedef struct Settings_ {
    bool updateProcessNames;
    bool accountGuestInCPUMeter;
    bool headerMargin;
+   bool screenTabs;
 
    bool changed;
 } Settings;
@@ -267,6 +268,7 @@ ScreenSettings* Settings_newScreen(Settings* this, const char* name, const char*
    ss->direction = 1;
    ss->treeView = 0;
    readFields(ss->fields, &(ss->flags), line);
+   ss->sortKey = ss->fields[0];
    this->screens[this->nScreens] = ss;
    this->nScreens++;
    this->screens = xRealloc(this->screens, sizeof(ScreenSettings*) * (this->nScreens + 1));
@@ -331,6 +333,8 @@ static bool Settings_read(Settings* this, const char* fileName) {
          this->highlightThreads = atoi(option[1]);
       } else if (String_eq(option[0], "header_margin")) {
          this->headerMargin = atoi(option[1]);
+      } else if (String_eq(option[0], "screen_tabs")) {
+         this->screenTabs = atoi(option[1]);
       } else if (String_eq(option[0], "expand_system_time")) {
          // Compatibility option.
          this->detailedCPUTime = atoi(option[1]);
@@ -443,6 +447,7 @@ bool Settings_write(Settings* this) {
    fprintf(fd, "highlight_megabytes=%d\n", (int) this->highlightMegabytes);
    fprintf(fd, "highlight_threads=%d\n", (int) this->highlightThreads);
    fprintf(fd, "header_margin=%d\n", (int) this->headerMargin);
+   fprintf(fd, "screen_tabs=%d\n", (int) this->screenTabs);
    fprintf(fd, "detailed_cpu_time=%d\n", (int) this->detailedCPUTime);
    fprintf(fd, "cpu_count_from_zero=%d\n", (int) this->countCPUsFromZero);
    fprintf(fd, "update_process_names=%d\n", (int) this->updateProcessNames);
@@ -559,6 +564,7 @@ Settings* Settings_new(int cpuCount) {
       this->highlightMegabytes = true;
       this->highlightThreads = true;
       this->headerMargin = true;
+      this->screenTabs = true;
    }
 
    this->ssIndex = 0;

Settings.h

@@ -64,6 +64,7 @@ typedef struct Settings_ {
    bool updateProcessNames;
    bool accountGuestInCPUMeter;
    bool headerMargin;
+   bool screenTabs;
 
    bool changed;
 } Settings;

darwin/Platform.c

@@ -38,7 +38,7 @@ typedef enum DarwinProcessFields {
 
 ScreenDefaults Platform_defaultScreens[] = {
    {
-      .name = "Default",
+      .name = "Main",
       .columns = "PID USER PRIORITY NICE M_SIZE M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME Command",
       .sortKey = "PERCENT_CPU",
    },

dragonflybsd/Platform.c

@@ -42,7 +42,7 @@ extern ProcessFieldData Process_fields[];
 
 ScreenDefaults Platform_defaultScreens[] = {
    {
-      .name = "Default",
+      .name = "Main",
       .columns = "PID USER PRIORITY NICE M_SIZE M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME Command",
       .sortKey = "PERCENT_CPU",
    },

freebsd/Platform.c

@@ -41,7 +41,7 @@ extern ProcessFieldData Process_fields[];
 
 ScreenDefaults Platform_defaultScreens[] = {
    {
-      .name = "Default",
+      .name = "Main",
       .columns = "PID USER PRIORITY NICE M_SIZE M_RESIDENT STATE PERCENT_CPU PERCENT_MEM TIME Command",
       .sortKey = "PERCENT_CPU",
    },

htop.c

@@ -237,7 +237,7 @@ int main(int argc, char** argv) {
    millisleep(75);
    ProcessList_scan(pl);
 
-   ScreenManager_run(scr, NULL, NULL);   
+   ScreenManager_run(scr, NULL, NULL, NULL);
    
    attron(CRT_colors[RESET_COLOR]);
    mvhline(LINES-1, 0, ' ', COLS);

linux/Platform.c

@@ -84,7 +84,7 @@ const SignalItem Platform_signals[] = {
 
 ScreenDefaults Platform_defaultScreens[] = {
    {
-      .name = "Default",
+      .name = "Main",
       .columns = "PID USER PRIORITY NICE M_SIZE M_RESIDENT M_SHARE STATE PERCENT_CPU PERCENT_MEM TIME Command",
       .sortKey = "PERCENT_CPU",
    },