perf ui/tui: Implement header window

Implement a simple, full-screen header window which shows session header
(metadata) information.  Press 'i' key to display the header window.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1388036284-32342-4-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/Makefile.perf b/tools/perf/Makefile.perf
index 97a2145..3638b0b 100644 (file)
--- a/tools/perf/Makefile.perf
+++ b/tools/perf/Makefile.perf
@@ -489,6 +489,7 @@ ifndef NO_SLANG
   LIB_OBJS += $(OUTPUT)ui/browsers/hists.o
   LIB_OBJS += $(OUTPUT)ui/browsers/map.o
   LIB_OBJS += $(OUTPUT)ui/browsers/scripts.o
+  LIB_OBJS += $(OUTPUT)ui/browsers/header.o
   LIB_OBJS += $(OUTPUT)ui/tui/setup.o
   LIB_OBJS += $(OUTPUT)ui/tui/util.o
   LIB_OBJS += $(OUTPUT)ui/tui/helpline.o

diff --git a/tools/perf/ui/browser.h b/tools/perf/ui/browser.h
index 7d45d2f..118cca2 100644 (file)
--- a/tools/perf/ui/browser.h
+++ b/tools/perf/ui/browser.h
@@ -59,6 +59,8 @@ int ui_browser__help_window(struct ui_browser *browser, const char *text);
 bool ui_browser__dialog_yesno(struct ui_browser *browser, const char *text);
 int ui_browser__input_window(const char *title, const char *text, char *input,
                             const char *exit_msg, int delay_sec);
+struct perf_session_env;
+int tui__header_window(struct perf_session_env *env);
 
 void ui_browser__argv_seek(struct ui_browser *browser, off_t offset, int whence);
 unsigned int ui_browser__argv_refresh(struct ui_browser *browser);

diff --git a/tools/perf/ui/browsers/header.c b/tools/perf/ui/browsers/header.c
new file mode 100644 (file)
index 0000000..89c16b9
--- /dev/null
+++ b/tools/perf/ui/browsers/header.c
@@ -0,0 +1,127 @@
+#include "util/cache.h"
+#include "util/debug.h"
+#include "ui/browser.h"
+#include "ui/ui.h"
+#include "ui/util.h"
+#include "ui/libslang.h"
+#include "util/header.h"
+#include "util/session.h"
+
+static void ui_browser__argv_write(struct ui_browser *browser,
+                                  void *entry, int row)
+{
+       char **arg = entry;
+       char *str = *arg;
+       char empty[] = " ";
+       bool current_entry = ui_browser__is_current_entry(browser, row);
+       unsigned long offset = (unsigned long)browser->priv;
+
+       if (offset >= strlen(str))
+               str = empty;
+       else
+               str = str + offset;
+
+       ui_browser__set_color(browser, current_entry ? HE_COLORSET_SELECTED :
+                                                      HE_COLORSET_NORMAL);
+
+       slsmg_write_nstring(str, browser->width);
+}
+
+static int list_menu__run(struct ui_browser *menu)
+{
+       int key;
+       unsigned long offset;
+       const char help[] =
+       "h/?/F1        Show this window\n"
+       "UP/DOWN/PGUP\n"
+       "PGDN/SPACE\n"
+       "LEFT/RIGHT    Navigate\n"
+       "q/ESC/CTRL+C  Exit browser";
+
+       if (ui_browser__show(menu, "Header information", "Press 'q' to exit") < 0)
+               return -1;
+
+       while (1) {
+               key = ui_browser__run(menu, 0);
+
+               switch (key) {
+               case K_RIGHT:
+                       offset = (unsigned long)menu->priv;
+                       offset += 10;
+                       menu->priv = (void *)offset;
+                       continue;
+               case K_LEFT:
+                       offset = (unsigned long)menu->priv;
+                       if (offset >= 10)
+                               offset -= 10;
+                       menu->priv = (void *)offset;
+                       continue;
+               case K_F1:
+               case 'h':
+               case '?':
+                       ui_browser__help_window(menu, help);
+                       continue;
+               case K_ESC:
+               case 'q':
+               case CTRL('c'):
+                       key = -1;
+                       break;
+               default:
+                       continue;
+               }
+
+               break;
+       }
+
+       ui_browser__hide(menu);
+       return key;
+}
+
+static int ui__list_menu(int argc, char * const argv[])
+{
+       struct ui_browser menu = {
+               .entries    = (void *)argv,
+               .refresh    = ui_browser__argv_refresh,
+               .seek       = ui_browser__argv_seek,
+               .write      = ui_browser__argv_write,
+               .nr_entries = argc,
+       };
+
+       return list_menu__run(&menu);
+}
+
+int tui__header_window(struct perf_session_env *env)
+{
+       int i, argc = 0;
+       char **argv;
+       struct perf_session *session;
+       char *ptr, *pos;
+       size_t size;
+       FILE *fp = open_memstream(&ptr, &size);
+
+       session = container_of(env, struct perf_session, header.env);
+       perf_header__fprintf_info(session, fp, true);
+       fclose(fp);
+
+       for (pos = ptr, argc = 0; (pos = strchr(pos, '\n')) != NULL; pos++)
+               argc++;
+
+       argv = calloc(argc + 1, sizeof(*argv));
+       if (argv == NULL)
+               goto out;
+
+       argv[0] = pos = ptr;
+       for (i = 1; (pos = strchr(pos, '\n')) != NULL; i++) {
+               *pos++ = '\0';
+               argv[i] = pos;
+       }
+
+       BUG_ON(i != argc + 1);
+
+       ui__list_menu(argc, argv);
+
+out:
+       free(argv);
+       free(ptr);
+       return 0;
+}

diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
index d43ec79..0d9dd99 100644 (file)
--- a/tools/perf/ui/browsers/hists.c
+++ b/tools/perf/ui/browsers/hists.c
@@ -1417,6 +1417,7 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
 
        /* help messages are sorted by lexical order of the hotkey */
        const char report_help[] = HIST_BROWSER_HELP_COMMON
+       "i             Show header information\n"
        "P             Print histograms to perf.hist.N\n"
        "r             Run available scripts\n"
        "s             Switch to another data file in PWD\n"
@@ -1513,6 +1514,11 @@ static int perf_evsel__hists_browse(struct perf_evsel *evsel, int nr_events,
                        if (is_report_browser(hbt))
                                goto do_data_switch;
                        continue;
+               case 'i':
+                       /* env->arch is NULL for live-mode (i.e. perf top) */
+                       if (env->arch)
+                               tui__header_window(env);
+                       continue;
                case K_F1:
                case 'h':
                case '?':