lyx_mirror/src/frontends/xforms/FormForks.C

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/**
* \file FormForks.C
* Copyright 2001 the LyX Team
* Read the file COPYING
*
* \author Angus Leeming, a.leeming@ic.ac.uk
* \date 2001-10-22
*/
#include <config.h>
#ifdef __GNUG__
#pragma implementation
#endif
#include "xformsBC.h"
#include "FormForks.h"
#include "ControlForks.h"
#include "forms/form_forks.h"
#include "Tooltips.h"
#include "helper_funcs.h"
#include "xforms_helpers.h"
#include "gettext.h"
#include "support/lstrings.h"
#include FORMS_H_LOCATION
using std::vector;
using std::find;
using std::find_if;
typedef FormCB<ControlForks, FormDB<FD_forks> > base_class;
FormForks::FormForks(ControlForks & c)
: base_class(c, _("Child processes"))
{}
void FormForks::build() {
dialog_.reset(build_forks(this));
// It appears that the browsers aren't initialised properly.
// This fudge fixes tings.
fl_add_browser_line(dialog_->browser_children, " ");
fl_add_browser_line(dialog_->browser_kill, " ");
fl_clear_browser(dialog_->browser_children);
fl_clear_browser(dialog_->browser_kill);
// Manage the ok, apply, restore and cancel/close buttons
bc().setOK(dialog_->button_ok);
bc().setApply(dialog_->button_apply);
bc().setCancel(dialog_->button_close);
bc().invalid();
// Set up the tooltip mechanism
string str = _("All currently running child processes forked by LyX.");
tooltips().init(dialog_->browser_children, str);
str = _("A list of all child processes to kill.");
tooltips().init(dialog_->browser_kill, str);
str = _("Add all processes to the list of processes to kill.");
tooltips().init(dialog_->button_all, str);
str = _("Add the currently selected child process to the list of processes to kill.");
tooltips().init(dialog_->button_add, str);
str = _("Remove the currently selected item from the list of processes to kill.");
tooltips().init(dialog_->button_remove, str);
}
void FormForks::update()
{
if (!form())
return;
string const current_pid_str =
getSelectedStringFromBrowser(dialog_->browser_kill);
pid_t const current_pid = strToInt(current_pid_str);
vector<pid_t> pids = controller().getPIDs();
// No child processes.
if (pids.empty()) {
if (fl_get_browser_maxline(dialog_->browser_kill) > 0)
fl_clear_browser(dialog_->browser_kill);
if (fl_get_browser_maxline(dialog_->browser_children) > 0)
fl_clear_browser(dialog_->browser_children);
setEnabled(dialog_->browser_children, false);
setEnabled(dialog_->browser_kill, false);
setEnabled(dialog_->button_all, false);
setEnabled(dialog_->button_add, false);
setEnabled(dialog_->button_remove, false);
return;
}
// Remove any processes from the kill browser that aren't in the
// vector of existing PIDs.
for (int i = 1; i <= fl_get_browser_maxline(dialog_->browser_kill);
++i) {
string const pid_str =
getStringFromBrowser(dialog_->browser_kill, i);
pid_t const pid = strToInt(pid_str);
vector<pid_t>::const_iterator it =
find(pids.begin(), pids.end(), pid);
if (it == pids.end())
fl_delete_browser_line(dialog_->browser_kill, i);
}
// Build the children browser from scratch.
if (fl_get_browser_maxline(dialog_->browser_children) > 0)
fl_clear_browser(dialog_->browser_children);
int i = 1;
for (vector<pid_t>::const_iterator it = pids.begin();
it != pids.end(); ++it) {
string const pid_str = tostr(*it);
string const command = controller().getCommand(*it);
string const line = pid_str + '\t' + command;
fl_add_browser_line(dialog_->browser_children, line.c_str());
if (*it == current_pid)
fl_select_browser_line(dialog_->browser_children, i);
++i;
}
setEnabled(dialog_->browser_children, true);
setEnabled(dialog_->button_all, true);
setEnabled(dialog_->button_add, true);
}
void FormForks::apply()
{
// Get the list of all processes to kill.
vector<string> const kill_vec =
getVectorFromBrowser(dialog_->browser_kill);
if (kill_vec.empty())
return;
// Remove these items from the vector of child processes.
for (int i = 1; i <= fl_get_browser_maxline(dialog_->browser_children);
++i) {
string const selection =
getStringFromBrowser(dialog_->browser_children, i);
string pid_str;
split(selection, pid_str, '\t');
vector<string>::const_iterator it =
find(kill_vec.begin(), kill_vec.end(), pid_str);
if (it != kill_vec.end())
fl_delete_browser_line(dialog_->browser_children, i);
}
// Clear the kill browser and deactivate appropriately.
fl_clear_browser(dialog_->browser_kill);
setEnabled(dialog_->browser_kill, false);
setEnabled(dialog_->button_remove, false);
// Pass these pids to the controller for destruction.
for (vector<string>::const_iterator it = kill_vec.begin();
it != kill_vec.end(); ++it) {
pid_t const pid = strToInt(*it);
controller().kill(pid);
}
}
ButtonPolicy::SMInput FormForks::input(FL_OBJECT * ob, long)
{
ButtonPolicy::SMInput activate = ButtonPolicy::SMI_NOOP;
if (ob == dialog_->browser_children) {
activate = input_browser_children();
} else if (ob == dialog_->browser_kill) {
activate = input_browser_kill();
} else if (ob == dialog_->button_all) {
activate = input_button_all();
} else if (ob == dialog_->button_add) {
activate = input_button_add();
} else if (ob == dialog_->button_remove) {
activate = input_button_remove();
}
return activate;
}
ButtonPolicy::SMInput FormForks::input_browser_children()
{
// Selected an item in the browser containing a list of all child
// processes.
// 1. Highlight this item in the browser of processes to kill
// if it is already there.
// 2. If it is there, enable the remove button so that it can
// be removed from this list, if so desired.
// 3. If it isn't there, activate the add button so that it can
// be added to this list if so desired.
string const selection =
getSelectedStringFromBrowser(dialog_->browser_children);
string pid_str;
split(selection, pid_str, '\t');
vector<string> const kill_vec =
getVectorFromBrowser(dialog_->browser_kill);
vector<string>::const_iterator it =
find(kill_vec.begin(), kill_vec.end(), pid_str);
fl_deselect_browser(dialog_->browser_kill);
if (it != kill_vec.end()) {
int const n = int(it - kill_vec.begin());
fl_select_browser_line(dialog_->browser_kill, n+1);
fl_set_browser_topline(dialog_->browser_kill, n+1);
}
setEnabled(dialog_->button_remove, it != kill_vec.end());
setEnabled(dialog_->button_add, it == kill_vec.end());
return ButtonPolicy::SMI_NOOP;
}
namespace {
class FindPID {
public:
FindPID(string const & pid) : pid_(pid) {}
bool operator()(string const & line)
{
if (line.empty())
return false;
string pid_str;
split(line, pid_str, '\t');
return pid_str == pid_;
}
private:
string pid_;
};
} // namespace anon
ButtonPolicy::SMInput FormForks::input_browser_kill()
{
// Selected an item in the browser containing a list of processes
// to kill.
// 1. Highlight this item in the browser of all child processes.
// 2. Enable the remove button so that it can removed from this list,
// if so desired.
// 3. Disable the add button.
string const pid_str =
getSelectedStringFromBrowser(dialog_->browser_kill);
// Find this string in the list of all child processes
vector<string> const child_vec =
getVectorFromBrowser(dialog_->browser_children);
vector<string>::const_iterator it =
find_if(child_vec.begin(), child_vec.end(), FindPID(pid_str));
fl_deselect_browser(dialog_->browser_children);
if (it != child_vec.end()) {
int const n = int(it - child_vec.begin());
fl_select_browser_line(dialog_->browser_children, n+1);
fl_set_browser_topline(dialog_->browser_children, n+1);
}
setEnabled(dialog_->button_remove, true);
setEnabled(dialog_->button_add, false);
return ButtonPolicy::SMI_NOOP;
}
namespace {
vector<string> const getPIDvector(FL_OBJECT * ob)
{
vector<string> vec = getVectorFromBrowser(ob);
if (vec.empty())
return vec;
for (vector<string>::iterator it = vec.begin(); it != vec.end(); ++it) {
string pid_str;
split(*it, pid_str, '\t');
*it = pid_str;
}
return vec;
}
} // namespace anon
ButtonPolicy::SMInput FormForks::input_button_all()
{
// Pressed the "All" button.
// 1. Check that the browser of processes to kill doesn't already
// contain the entire list.
// 2. If it doesn't, copy the PIDs of all child processes into the
// browser of processes to kill.
// 3. Deactivate the "children" browser and the "add" and "all" buttons
// 4. Activate the "kill" browser and the "remove" button"
ButtonPolicy::SMInput activate = ButtonPolicy::SMI_NOOP;
vector<string> const pid_vec = getPIDvector(dialog_->browser_children);
// to resolve a warning about comparison between signed and unsigned.
int const pid_vec_size = int(pid_vec.size());
if (fl_get_browser_maxline(dialog_->browser_kill) != pid_vec_size) {
activate = ButtonPolicy::SMI_VALID;
fl_clear_browser(dialog_->browser_kill);
for (vector<string>::const_iterator it = pid_vec.begin();
it != pid_vec.end(); ++it) {
fl_add_browser_line(dialog_->browser_kill, it->c_str());
}
if (fl_get_browser_maxline(dialog_->browser_kill) >= 1)
fl_set_browser_topline(dialog_->browser_kill, 1);
}
setEnabled(dialog_->browser_children, false);
setEnabled(dialog_->button_add, false);
setEnabled(dialog_->button_all, false);
setEnabled(dialog_->browser_kill, true);
setEnabled(dialog_->button_remove, true);
return activate;
}
ButtonPolicy::SMInput FormForks::input_button_add()
{
// Pressed the "Add" button.
// 1. Copy the PID of the selected item in the browser of all child
// processes over into the browser of processes to kill.
// 2. Activate the "kill" browser and the "remove" button.
// 3. Deactivate the "add" button.
string const selection =
getSelectedStringFromBrowser(dialog_->browser_children);
string pid_str;
split(selection, pid_str, '\t');
vector<string> const kill_vec =
getVectorFromBrowser(dialog_->browser_kill);
vector<string>::const_iterator it =
find(kill_vec.begin(), kill_vec.end(), pid_str);
if (it == kill_vec.end()) {
fl_add_browser_line(dialog_->browser_kill, pid_str.c_str());
int const n = fl_get_browser_maxline(dialog_->browser_kill);
fl_select_browser_line(dialog_->browser_kill, n);
}
setEnabled(dialog_->browser_kill, true);
setEnabled(dialog_->button_remove, true);
setEnabled(dialog_->button_add, false);
return ButtonPolicy::SMI_VALID;
}
ButtonPolicy::SMInput FormForks::input_button_remove()
{
// Pressed the "Remove" button.
// 1. Remove the selected item in the browser of processes to kill.
// 2. Activate the "add" button and "all" buttons.
// 3. Deactivate the "remove" button.
int const sel = fl_get_browser(dialog_->browser_kill);
fl_delete_browser_line(dialog_->browser_kill, sel);
setEnabled(dialog_->button_add, true);
setEnabled(dialog_->button_all, true);
setEnabled(dialog_->button_remove, false);
return ButtonPolicy::SMI_VALID;
}