Allow typing to select items in various panels (sort, user, signal).

Factored code from the SignalsPanel to apply to all selections from main screen.
Closes feature request #3425304.

Makefile.am

@@ -23,7 +23,7 @@ ClockMeter.c ColorsPanel.c ColumnsPanel.c CPUMeter.c CRT.c DebugMemory.c \
 DisplayOptionsPanel.c FunctionBar.c Hashtable.c Header.c htop.c ListItem.c \
 LoadAverageMeter.c MemoryMeter.c Meter.c MetersPanel.c Object.c Panel.c \
 BatteryMeter.c Process.c ProcessList.c RichString.c ScreenManager.c Settings.c \
-SignalItem.c SignalsPanel.c String.c SwapMeter.c TasksMeter.c TraceScreen.c \
+SignalsPanel.c String.c SwapMeter.c TasksMeter.c TraceScreen.c \
 UptimeMeter.c UsersTable.c Vector.c AvailableColumnsPanel.c AffinityPanel.c \
 HostnameMeter.c OpenFilesScreen.c Affinity.c
 
@@ -32,7 +32,7 @@ CategoriesPanel.h CheckItem.h ClockMeter.h ColorsPanel.h ColumnsPanel.h \
 CPUMeter.h CRT.h DebugMemory.h DisplayOptionsPanel.h FunctionBar.h \
 Hashtable.h Header.h htop.h ListItem.h LoadAverageMeter.h MemoryMeter.h \
 BatteryMeter.h Meter.h MetersPanel.h Object.h Panel.h ProcessList.h RichString.h \
-ScreenManager.h Settings.h SignalItem.h SignalsPanel.h String.h \
+ScreenManager.h Settings.h SignalsPanel.h String.h \
 SwapMeter.h TasksMeter.h TraceScreen.h UptimeMeter.h UsersTable.h Vector.h \
 Process.h AffinityPanel.h HostnameMeter.h OpenFilesScreen.h Affinity.h
 

Panel.c

@@ -47,6 +47,7 @@ struct Panel_ {
    bool needsRedraw;
    RichString header;
    Panel_EventHandler eventHandler;
+   char* eventHandlerBuffer;
 };
 
 }*/

Panel.h

@@ -49,6 +49,7 @@ struct Panel_ {
    bool needsRedraw;
    RichString header;
    Panel_EventHandler eventHandler;
+   char* eventHandlerBuffer;
 };
 
 

SignalItem.c

-/*
-htop - SignalItem.c
-(C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPL, see the COPYING file
-in the source distribution for its full text.
-*/
-
-#include "SignalItem.h"
-#include "String.h"
-#include "Object.h"
-#include "RichString.h"
-#include <string.h>
-
-#include "debug.h"
-
-#define SIGNAL_COUNT 34
-
-/*{
-
-typedef struct Signal_ {
-   Object super;
-   const char* name;
-   int number;
-} Signal;
-
-}*/
-
-#ifdef DEBUG
-char* SIGNAL_CLASS = "Signal";
-#else
-#define SIGNAL_CLASS NULL
-#endif
-
-static void Signal_delete(Object* cast) {
-   Signal* this = (Signal*)cast;
-   assert (this != NULL);
-   // names are string constants, so we're not deleting them.
-   free(this);
-}
-
-static void Signal_display(Object* cast, RichString* out) {
-   Signal* this = (Signal*)cast;
-   assert (this != NULL);
-   
-   char buffer[31];
-   snprintf(buffer, 30, "%2d %s", this->number, this->name);
-   RichString_write(out, CRT_colors[DEFAULT_COLOR], buffer);
-}
-
-static Signal* Signal_new(const char* name, int number) {
-   Signal* this = malloc(sizeof(Signal));
-   Object_setClass(this, SIGNAL_CLASS);
-   ((Object*)this)->display = Signal_display;
-   ((Object*)this)->delete = Signal_delete;
-   this->name = name;
-   this->number = number;
-   return this;
-}
-
-int Signal_getSignalCount() {
-   return SIGNAL_COUNT;
-}
-
-Signal** Signal_getSignalTable() {
-   Signal** signals = malloc(sizeof(Signal*) * SIGNAL_COUNT);
-   signals[0] = Signal_new("Cancel", 0);
-   signals[1] = Signal_new("SIGHUP", 1);
-   signals[2] = Signal_new("SIGINT", 2);
-   signals[3] = Signal_new("SIGQUIT", 3);
-   signals[4] = Signal_new("SIGILL", 4);
-   signals[5] = Signal_new("SIGTRAP", 5);
-   signals[6] = Signal_new("SIGABRT", 6);
-   signals[7] = Signal_new("SIGIOT", 6);
-   signals[8] = Signal_new("SIGBUS", 7);
-   signals[9] = Signal_new("SIGFPE", 8);
-   signals[10] = Signal_new("SIGKILL", 9);
-   signals[11] = Signal_new("SIGUSR1", 10);
-   signals[12] = Signal_new("SIGSEGV", 11);
-   signals[13] = Signal_new("SIGUSR2", 12);
-   signals[14] = Signal_new("SIGPIPE", 13);
-   signals[15] = Signal_new("SIGALRM", 14);
-   signals[16] = Signal_new("SIGTERM", 15);
-   signals[17] = Signal_new("SIGSTKFLT", 16);
-   signals[18] = Signal_new("SIGCHLD", 17);
-   signals[19] = Signal_new("SIGCONT", 18);
-   signals[20] = Signal_new("SIGSTOP", 19);
-   signals[21] = Signal_new("SIGTSTP", 20);
-   signals[22] = Signal_new("SIGTTIN", 21);
-   signals[23] = Signal_new("SIGTTOU", 22);
-   signals[24] = Signal_new("SIGURG", 23);
-   signals[25] = Signal_new("SIGXCPU", 24);
-   signals[26] = Signal_new("SIGXFSZ", 25);
-   signals[27] = Signal_new("SIGVTALRM", 26);
-   signals[28] = Signal_new("SIGPROF", 27);
-   signals[29] = Signal_new("SIGWINCH", 28);
-   signals[30] = Signal_new("SIGIO", 29);
-   signals[31] = Signal_new("SIGPOLL", 29);
-   signals[32] = Signal_new("SIGPWR", 30);
-   signals[33] = Signal_new("SIGSYS", 31);
-   return signals;
-}

SignalItem.h

-/* Do not edit this file. It was automatically generated. */
-
-#ifndef HEADER_SignalItem
-#define HEADER_SignalItem
-/*
-htop - SignalItem.h
-(C) 2004-2011 Hisham H. Muhammad
-Released under the GNU GPL, see the COPYING file
-in the source distribution for its full text.
-*/
-
-#include "String.h"
-#include "Object.h"
-#include "RichString.h"
-#include <string.h>
-
-#include "debug.h"
-
-#define SIGNAL_COUNT 34
-
-
-typedef struct Signal_ {
-   Object super;
-   const char* name;
-   int number;
-} Signal;
-
-
-#ifdef DEBUG
-extern char* SIGNAL_CLASS;
-#else
-#define SIGNAL_CLASS NULL
-#endif
-
-int Signal_getSignalCount();
-
-Signal** Signal_getSignalTable();
-
-#endif

SignalsPanel.c

 
 #include "SignalsPanel.h"
 #include "Panel.h"
-#include "SignalItem.h"
+#include "ListItem.h"
 #include "RichString.h"
 
 #include "debug.h"
@@ -13,37 +13,14 @@
 
 typedef struct SignalsPanel_ {
    Panel super;
-
-   int state;
-   Signal** signals;
+   ListItem** signals;
 } SignalsPanel;
 
 }*/
 
-static HandlerResult SignalsPanel_eventHandler(Panel* super, int ch) {
-   SignalsPanel* this = (SignalsPanel*) super;
-
-   int size = Panel_size(super);
-   
-   if (ch <= 255 && isdigit(ch)) {
-      int sgn = ch-48 + this->state;
-      for (int i = 0; i < size; i++)
-         if (((Signal*) Panel_get(super, i))->number == sgn) {
-            Panel_setSelected(super, i);
-            break;
-         }
-      this->state = sgn * 10;
-      if (this->state > 100)
-         this->state = 0;
-      return HANDLED;
-   } else {
-      this->state = 0;
-   }
-   if (ch == 13) {
-      return BREAK_LOOP;
-   }
-   return IGNORED;
-}
+#ifndef SIGNAL_COUNT
+#define SIGNAL_COUNT 34
+#endif
 
 static void SignalsPanel_delete(Object* object) {
    Panel* super = (Panel*) object;
@@ -53,16 +30,53 @@ static void SignalsPanel_delete(Object* object) {
    free(this);
 }
 
+static ListItem** Signal_getSignalTable() {
+   ListItem** signals = malloc(sizeof(ListItem*) * SIGNAL_COUNT);
+   signals[0] = ListItem_new(" 0 Cancel", 0);
+   signals[1] = ListItem_new(" 1 SIGHUP", 1);
+   signals[2] = ListItem_new(" 2 SIGINT", 2);
+   signals[3] = ListItem_new(" 3 SIGQUIT", 3);
+   signals[4] = ListItem_new(" 4 SIGILL", 4);
+   signals[5] = ListItem_new(" 5 SIGTRAP", 5);
+   signals[6] = ListItem_new(" 6 SIGABRT", 6);
+   signals[7] = ListItem_new(" 6 SIGIOT", 6);
+   signals[8] = ListItem_new(" 7 SIGBUS", 7);
+   signals[9] = ListItem_new(" 8 SIGFPE", 8);
+   signals[10] = ListItem_new(" 9 SIGKILL", 9);
+   signals[11] = ListItem_new("10 SIGUSR1", 10);
+   signals[12] = ListItem_new("11 SIGSEGV", 11);
+   signals[13] = ListItem_new("12 SIGUSR2", 12);
+   signals[14] = ListItem_new("13 SIGPIPE", 13);
+   signals[15] = ListItem_new("14 SIGALRM", 14);
+   signals[16] = ListItem_new("15 SIGTERM", 15);
+   signals[17] = ListItem_new("16 SIGSTKFLT", 16);
+   signals[18] = ListItem_new("17 SIGCHLD", 17);
+   signals[19] = ListItem_new("18 SIGCONT", 18);
+   signals[20] = ListItem_new("19 SIGSTOP", 19);
+   signals[21] = ListItem_new("20 SIGTSTP", 20);
+   signals[22] = ListItem_new("21 SIGTTIN", 21);
+   signals[23] = ListItem_new("22 SIGTTOU", 22);
+   signals[24] = ListItem_new("23 SIGURG", 23);
+   signals[25] = ListItem_new("24 SIGXCPU", 24);
+   signals[26] = ListItem_new("25 SIGXFSZ", 25);
+   signals[27] = ListItem_new("26 SIGVTALRM", 26);
+   signals[28] = ListItem_new("27 SIGPROF", 27);
+   signals[29] = ListItem_new("28 SIGWINCH", 28);
+   signals[30] = ListItem_new("29 SIGIO", 29);
+   signals[31] = ListItem_new("29 SIGPOLL", 29);
+   signals[32] = ListItem_new("30 SIGPWR", 30);
+   signals[33] = ListItem_new("31 SIGSYS", 31);
+   return signals;
+}
+
 SignalsPanel* SignalsPanel_new(int x, int y, int w, int h) {
    SignalsPanel* this = (SignalsPanel*) malloc(sizeof(SignalsPanel));
    Panel* super = (Panel*) this;
-   Panel_init(super, x, y, w, h, SIGNAL_CLASS, true);
+   Panel_init(super, x, y, w, h, LISTITEM_CLASS, true);
    ((Object*)this)->delete = SignalsPanel_delete;
 
    this->signals = Signal_getSignalTable();
-   super->eventHandler = SignalsPanel_eventHandler;
-   int sigCount = Signal_getSignalCount();
-   for(int i = 0; i < sigCount; i++)
+   for(int i = 0; i < SIGNAL_COUNT; i++)
       Panel_set(super, i, (Object*) this->signals[i]);
    SignalsPanel_reset(this);
    return this;
@@ -73,5 +87,4 @@ void SignalsPanel_reset(SignalsPanel* this) {
 
    Panel_setHeader(super, "Send signal:");
    Panel_setSelected(super, 16); // 16th item is SIGTERM
-   this->state = 0;
 }

SignalsPanel.h

@@ -4,7 +4,7 @@
 #define HEADER_SignalsPanel
 
 #include "Panel.h"
-#include "SignalItem.h"
+#include "ListItem.h"
 #include "RichString.h"
 
 #include "debug.h"
@@ -15,12 +15,14 @@
 
 typedef struct SignalsPanel_ {
    Panel super;
-
-   int state;
-   Signal** signals;
+   ListItem** signals;
 } SignalsPanel;
 
 
+#ifndef SIGNAL_COUNT
+#define SIGNAL_COUNT 34
+#endif
+
 SignalsPanel* SignalsPanel_new(int x, int y, int w, int h);
 
 void SignalsPanel_reset(SignalsPanel* this);

htop.c

@@ -195,15 +195,41 @@ static bool changePriority(Panel* panel, int delta) {
 }
 
 static HandlerResult pickWithEnter(Panel* panel, int ch) {
-   (void) panel;
-   if (ch == 13)
+   int size = Panel_size(panel);
+ 
+   if (isalnum(ch)) {
+      int len = strlen(panel->eventHandlerBuffer);
+      if (len < 99) {
+         panel->eventHandlerBuffer[len] = ch;
+         panel->eventHandlerBuffer[len+1] = '\0';
+      }
+      for (int try = 0; try < 2; try++) {
+         len = strlen(panel->eventHandlerBuffer);
+         for (int i = 0; i < size; i++) {
+            char* cur = ((ListItem*) Panel_get(panel, i))->value;
+            while (*cur == ' ') cur++;
+            if (strncasecmp(cur, panel->eventHandlerBuffer, len) == 0) {
+               Panel_setSelected(panel, i);
+               return HANDLED;
+            }
+         }
+         panel->eventHandlerBuffer[0] = ch;
+         panel->eventHandlerBuffer[1] = '\0';
+      }
+      return HANDLED;
+   } else if (ch != ERR) {
+      panel->eventHandlerBuffer[0] = '\0';
+   }
+   if (ch == 13) {
       return BREAK_LOOP;
+   }
    return IGNORED;
 }
 
 static Object* pickFromVector(Panel* panel, Panel* list, int x, int y, const char** keyLabels, FunctionBar* prevBar, Header* header) {
    const char* fuKeys[] = {"Enter", "Esc", NULL};
    int fuEvents[] = {13, 27};
+   list->eventHandlerBuffer = calloc(100, 1);
    if (!list->eventHandler)
       Panel_setEventHandler(list, pickWithEnter);
    ScreenManager* scr = ScreenManager_new(0, y, 0, -1, HORIZONTAL, header, false);
@@ -213,6 +239,8 @@ static Object* pickFromVector(Panel* panel, Panel* list, int x, int y, const cha
    int ch;
    ScreenManager_run(scr, &panelFocus, &ch);
    ScreenManager_delete(scr);
+   free(list->eventHandlerBuffer);
+   list->eventHandlerBuffer = NULL;
    Panel_move(panel, 0, y);
    Panel_resize(panel, COLS, LINES-y-1);
    FunctionBar_draw(prevBar, NULL);
@@ -758,7 +786,7 @@ int main(int argc, char** argv) {
          const char* fuFunctions[] = {"Send  ", "Cancel ", NULL};
          Signal* sgn = (Signal*) pickFromVector(panel, killPanel, 15, headerHeight, fuFunctions, defaultBar, header);
          if (sgn) {
-            if (sgn->number != 0) {
+            if (sgn->super.key != 0) {
                Panel_setHeader(panel, "Sending...");
                Panel_draw(panel, true);
                refresh();
@@ -766,13 +794,13 @@ int main(int argc, char** argv) {
                for (int i = 0; i < Panel_size(panel); i++) {
                   Process* p = (Process*) Panel_get(panel, i);
                   if (p->tag) {
-                     Process_sendSignal(p, sgn->number);
+                     Process_sendSignal(p, sgn->super.key);
                      anyTagged = true;
                   }
                }
                if (!anyTagged) {
                   Process* p = (Process*) Panel_getSelected(panel);
-                  Process_sendSignal(p, sgn->number);
+                  Process_sendSignal(p, sgn->super.key);
                }
                napms(500);
             }