kdbg/procattach.cpp

   1 // $Id$
   2
   3 // Copyright by Johannes Sixt
   4 // This file is under GPL, the GNU General Public Licence
   5
   6 #include "procattach.h"
   7 #include <qlistview.h>
   8 #include <qtoolbutton.h>
   9 #include <qlineedit.h>
  10 #include <kprocess.h>
  11 #include <ctype.h>
  12 #include <kapp.h>
  13 #include <kiconloader.h>
  14 #include <klocale.h>                    /* i18n */
  15 #ifdef HAVE_CONFIG_H
  16 #include "config.h"
  17 #endif
  18
  19
  20 ProcAttachPS::ProcAttachPS(QWidget* parent) :
  21         ProcAttachBase(parent),
  22         m_pidCol(-1),
  23         m_ppidCol(-1)
  24 {
  25     m_ps = new KProcess;
  26     connect(m_ps, SIGNAL(receivedStdout(KProcess*, char*, int)),
  27             this, SLOT(slotTextReceived(KProcess*, char*, int)));
  28     connect(m_ps, SIGNAL(processExited(KProcess*)),
  29             this, SLOT(slotPSDone()));
  30
  31     QIconSet icon = SmallIconSet("clear_left");
  32     filterClear->setIconSet(icon);
  33
  34     processList->setColumnWidth(0, 300);
  35     processList->setColumnWidthMode(0, QListView::Manual);
  36     processList->setColumnAlignment(1, Qt::AlignRight);
  37     processList->setColumnAlignment(2, Qt::AlignRight);
  38
  39     // set the command line
  40     static const char* const psCommand[] = {
  41 #ifdef PS_COMMAND
  42         PS_COMMAND,
  43 #else
  44         "/bin/false",
  45 #endif
  46         0
  47     };
  48     for (int i = 0; psCommand[i] != 0; i++) {
  49         *m_ps << psCommand[i];
  50     }
  51
  52     runPS();
  53 }
  54
  55 ProcAttachPS::~ProcAttachPS()
  56 {
  57     delete m_ps;        // kills a running ps
  58 }
  59
  60 void ProcAttachPS::runPS()
  61 {
  62     // clear the parse state from previous runs
  63     m_token = "";
  64     m_line.clear();
  65     m_pidCol = -1;
  66     m_ppidCol = -1;
  67
  68     m_ps->start(KProcess::NotifyOnExit, KProcess::Stdout);
  69 }
  70
  71 void ProcAttachPS::slotTextReceived(KProcess*, char* buffer, int buflen)
  72 {
  73     const char* end = buffer+buflen;
  74     while (buffer < end)
  75     {
  76         // check new line
  77         if (*buffer == '\n')
  78         {
  79             // push a tokens onto the line
  80             if (!m_token.isEmpty()) {
  81                 m_line.push_back(QString::fromLatin1(m_token));
  82                 m_token = "";
  83             }
  84             // and insert the line in the list
  85             pushLine();
  86             m_line.clear();
  87             ++buffer;
  88         }
  89         // blanks: the last column gets the rest of the line, including blanks
  90         else if ((m_pidCol < 0 || int(m_line.size()) < processList->columns()-1) &&
  91                  isspace(*buffer))
  92         {
  93             // push a token onto the line
  94             if (!m_token.isEmpty()) {
  95                 m_line.push_back(QString::fromLatin1(m_token));
  96                 m_token = "";
  97             }
  98             do {
  99                 ++buffer;
 100             } while (buffer < end && isspace(*buffer));
 101         }
 102         // tokens
 103         else
 104         {
 105             const char* start = buffer;
 106             do {
 107                 ++buffer;
 108             } while (buffer < end && !isspace(*buffer));
 109             // append to the current token
 110             m_token += QCString(start, buffer-start+1); // must count the '\0'
 111         }
 112     }
 113 }
 114
 115 void ProcAttachPS::pushLine()
 116 {
 117     if (m_line.size() < 3)      // we need the PID, PPID, and COMMAND columns
 118         return;
 119
 120     if (m_pidCol < 0)
 121     {
 122         // create columns if we don't have them yet
 123         bool allocate = processList->columns() == 3;
 124
 125         // we assume that the last column is the command
 126         m_line.pop_back();
 127
 128         for (uint i = 0; i < m_line.size(); i++) {
 129             // we don't allocate the PID and PPID columns,
 130             // but we need to know where in the ps output they are
 131             if (m_line[i] == "PID") {
 132                 m_pidCol = i;
 133             } else if (m_line[i] == "PPID") {
 134                 m_ppidCol = i;
 135             } else if (allocate) {
 136                 processList->addColumn(m_line[i]);
 137                 // these columns are normally numbers
 138                 processList->setColumnAlignment(processList->columns()-1,
 139                                                 Qt::AlignRight);
 140             }
 141         }
 142     }
 143     else
 144     {
 145         // insert a line
 146         // find the parent process
 147         QListViewItem* parent = 0;
 148         if (m_ppidCol >= 0 && m_ppidCol < int(m_line.size())) {
 149             parent = processList->findItem(m_line[m_ppidCol], 1);
 150         }
 151
 152         // we assume that the last column is the command
 153         QListViewItem* item;
 154         if (parent == 0) {
 155             item = new QListViewItem(processList, m_line.back());
 156         } else {
 157             item = new QListViewItem(parent, m_line.back());
 158         }
 159         item->setOpen(true);
 160         m_line.pop_back();
 161         int k = 3;
 162         for (uint i = 0; i < m_line.size(); i++)
 163         {
 164             // display the pid and ppid columns' contents in columns 1 and 2
 165             if (int(i) == m_pidCol)
 166                 item->setText(1, m_line[i]);
 167             else if (int(i) == m_ppidCol)
 168                 item->setText(2, m_line[i]);
 169             else
 170                 item->setText(k++, m_line[i]);
 171         }
 172
 173         if (m_ppidCol >= 0 && m_pidCol >= 0) {  // need PID & PPID for this
 174             /*
 175              * It could have happened that a process was earlier inserted,
 176              * whose parent process is the current process. Such processes
 177              * were placed at the root. Here we go through all root items
 178              * and check whether we must reparent them.
 179              */
 180             QListViewItem* i = processList->firstChild();
 181             while (i != 0)
 182             {
 183                 // advance before we reparent the item
 184                 QListViewItem* it = i;
 185                 i = i->nextSibling();
 186                 if (it->text(2) == m_line[m_pidCol]) {
 187                     processList->takeItem(it);
 188                     item->insertItem(it);
 189                 }
 190             }
 191         }
 192     }
 193 }
 194
 195 void ProcAttachPS::slotPSDone()
 196 {
 197     filterEdited(filterEdit->text());
 198 }
 199
 200 QString ProcAttachPS::text() const
 201 {
 202     QListViewItem* item = processList->selectedItem();
 203
 204     if (item == 0)
 205         return QString();
 206
 207     return item->text(1);
 208 }
 209
 210 void ProcAttachPS::refresh()
 211 {
 212     if (!m_ps->isRunning())
 213     {
 214         processList->clear();
 215         buttonOk->setEnabled(false);    // selection was cleared
 216         runPS();
 217     }
 218 }
 219
 220 void ProcAttachPS::filterEdited(const QString& text)
 221 {
 222     QListViewItem* i = processList->firstChild();
 223     if (i) {
 224         setVisibility(i, text);
 225     }
 226 }
 227
 228 /**
 229  * Sets the visibility of \a i and
 230  * returns whether it was made visible.
 231  */
 232 bool ProcAttachPS::setVisibility(QListViewItem* i, const QString& text)
 233 {
 234     bool visible = false;
 235     for (QListViewItem* j = i->firstChild(); j; j = j->nextSibling())
 236     {
 237         if (setVisibility(j, text))
 238             visible = true;
 239     }
 240     // look for text in the process name and in the PID
 241     visible = visible || text.isEmpty() ||
 242         i->text(0).find(text, 0, false) >= 0 ||
 243         i->text(1).find(text) >= 0;
 244
 245     i->setVisible(visible);
 246
 247     // disable the OK button if the selected item becomes invisible
 248     if (i->isSelected())
 249         buttonOk->setEnabled(visible);
 250
 251     return visible;
 252 }
 253
 254 void ProcAttachPS::selectedChanged()
 255 {
 256     buttonOk->setEnabled(processList->selectedItem() != 0);
 257 }
 258
 259
 260 ProcAttach::ProcAttach(QWidget* parent) :
 261         QDialog(parent, "procattach", true),
 262         m_label(this, "label"),
 263         m_processId(this, "procid"),
 264         m_buttonOK(this, "ok"),
 265         m_buttonCancel(this, "cancel"),
 266         m_layout(this, 8),
 267         m_buttons(4)
 268 {
 269     QString title = kapp->caption();
 270     title += i18n(": Attach to process");
 271     setCaption(title);
 272
 273     m_label.setMinimumSize(330, 24);
 274     m_label.setText(i18n("Specify the process number to attach to:"));
 275
 276     m_processId.setMinimumSize(330, 24);
 277     m_processId.setMaxLength(100);
 278     m_processId.setFrame(true);
 279
 280     m_buttonOK.setMinimumSize(100, 30);
 281     connect(&m_buttonOK, SIGNAL(clicked()), SLOT(accept()));
 282     m_buttonOK.setText(i18n("OK"));
 283     m_buttonOK.setDefault(true);
 284
 285     m_buttonCancel.setMinimumSize(100, 30);
 286     connect(&m_buttonCancel, SIGNAL(clicked()), SLOT(reject()));
 287     m_buttonCancel.setText(i18n("Cancel"));
 288
 289     m_layout.addWidget(&m_label);
 290     m_layout.addWidget(&m_processId);
 291     m_layout.addLayout(&m_buttons);
 292     m_layout.addStretch(10);
 293     m_buttons.addStretch(10);
 294     m_buttons.addWidget(&m_buttonOK);
 295     m_buttons.addSpacing(40);
 296     m_buttons.addWidget(&m_buttonCancel);
 297     m_buttons.addStretch(10);
 298
 299     m_layout.activate();
 300
 301     m_processId.setFocus();
 302     resize(350, 120);
 303 }
 304
 305 ProcAttach::~ProcAttach()
 306 {
 307 }