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htop/ScreenManager.c

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/*
htop - ScreenManager.c
(C) 2004-2011 Hisham H. Muhammad
Released under the GNU GPLv2+, see the COPYING file
in the source distribution for its full text.
*/
#include "config.h" // IWYU pragma: keep
#include "ScreenManager.h"
#include <assert.h>
#include <stdbool.h>
#include <stdlib.h>
#include <sys/time.h>
#include "CRT.h"
#include "FunctionBar.h"
#include "Macros.h"
#include "Object.h"
#include "Platform.h"
#include "ProcessList.h"
#include "ProvideCurses.h"
#include "XUtils.h"
ScreenManager* ScreenManager_new(Header* header, const Settings* settings, const State* state, bool owner) {
ScreenManager* this;
this = xMalloc(sizeof(ScreenManager));
this->x1 = 0;
this->y1 = 0;
this->x2 = 0;
this->y2 = -1;
this->panels = Vector_new(Class(Panel), owner, DEFAULT_SIZE);
this->panelCount = 0;
this->header = header;
this->settings = settings;
this->state = state;
this->allowFocusChange = true;
return this;
}
void ScreenManager_delete(ScreenManager* this) {
Vector_delete(this->panels);
free(this);
}
inline int ScreenManager_size(const ScreenManager* this) {
return this->panelCount;
}
void ScreenManager_add(ScreenManager* this, Panel* item, int size) {
ScreenManager_insert(this, item, size, Vector_size(this->panels));
}
void ScreenManager_insert(ScreenManager* this, Panel* item, int size, int idx) {
int lastX = 0;
if (idx > 0) {
const Panel* last = (const Panel*) Vector_get(this->panels, idx - 1);
lastX = last->x + last->w + 1;
}
int height = LINES - this->y1 - (this->header ? this->header->height : 0) + this->y2;
if (size <= 0) {
size = COLS - this->x1 + this->x2 - lastX;
}
Panel_resize(item, size, height);
Panel_move(item, lastX, this->y1 + (this->header ? this->header->height : 0));
if (idx < this->panelCount) {
for (int i = idx + 1; i <= this->panelCount; i++) {
Panel* p = (Panel*) Vector_get(this->panels, i);
Panel_move(p, p->x + size, p->y);
}
}
Vector_insert(this->panels, idx, item);
item->needsRedraw = true;
this->panelCount++;
}
Panel* ScreenManager_remove(ScreenManager* this, int idx) {
assert(this->panelCount > idx);
int w = ((Panel*) Vector_get(this->panels, idx))->w;
Panel* panel = (Panel*) Vector_remove(this->panels, idx);
this->panelCount--;
if (idx < this->panelCount) {
for (int i = idx; i < this->panelCount; i++) {
Panel* p = (Panel*) Vector_get(this->panels, i);
Panel_move(p, p->x - w, p->y);
}
}
return panel;
}
void ScreenManager_resize(ScreenManager* this) {
int y1_header = this->y1 + (this->header ? this->header->height : 0);
int panels = this->panelCount;
int lastX = 0;
for (int i = 0; i < panels - 1; i++) {
Panel* panel = (Panel*) Vector_get(this->panels, i);
Panel_resize(panel, panel->w, LINES - y1_header + this->y2);
Panel_move(panel, lastX, y1_header);
lastX = panel->x + panel->w + 1;
}
Panel* panel = (Panel*) Vector_get(this->panels, panels - 1);
Panel_resize(panel, COLS - this->x1 + this->x2 - lastX, LINES - y1_header + this->y2);
Panel_move(panel, lastX, y1_header);
}
static void checkRecalculation(ScreenManager* this, double* oldTime, int* sortTimeout, bool* redraw, bool* rescan, bool* timedOut, bool *force_redraw) {
ProcessList* pl = this->header->pl;
Platform_gettime_realtime(&pl->realtime, &pl->realtimeMs);
double newTime = ((double)pl->realtime.tv_sec * 10) + ((double)pl->realtime.tv_usec / 100000);
*timedOut = (newTime - *oldTime > this->settings->delay);
*rescan |= *timedOut;
if (newTime < *oldTime) {
*rescan = true; // clock was adjusted?
}
if (*rescan) {
*oldTime = newTime;
int oldUidDigits = Process_uidDigits;
if (!this->state->pauseProcessUpdate && (*sortTimeout == 0 || this->settings->ss->treeView)) {
pl->needsSort = true;
*sortTimeout = 1;
}
// scan processes first - some header values are calculated there
ProcessList_scan(pl, this->state->pauseProcessUpdate);
// always update header, especially to avoid gaps in graph meters
Header_updateData(this->header);
// force redraw if the number of UID digits was changed
if (Process_uidDigits != oldUidDigits) {
*force_redraw = true;
}
*redraw = true;
}
if (*redraw) {
ProcessList_rebuildPanel(pl);
Header_draw(this->header);
}
*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 = MINIMUM(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, bool force_redraw) {
if (this->settings->screenTabs) {
ScreenManager_drawScreenTabs(this);
}
const int nPanels = this->panelCount;
for (int i = 0; i < nPanels; i++) {
Panel* panel = (Panel*) Vector_get(this->panels, i);
Panel_draw(panel,
force_redraw,
i == focus,
panel != (Panel*)this->state->mainPanel || !this->state->hideProcessSelection,
State_hideFunctionBar(this->state));
mvvline(panel->y, panel->x + panel->w, ' ', panel->h + (State_hideFunctionBar(this->state) ? 1 : 0));
}
}
void ScreenManager_run(ScreenManager* this, Panel** lastFocus, int* lastKey, const char* name) {
bool quit = false;
int focus = 0;
Panel* panelFocus = (Panel*) Vector_get(this->panels, focus);
double oldTime = 0.0;
int ch = ERR;
int closeTimeout = 0;
bool timedOut = true;
bool redraw = true;
bool force_redraw = true;
bool rescan = false;
int sortTimeout = 0;
int resetSortTimeout = 5;
this->name = name;
while (!quit) {
if (this->header) {
checkRecalculation(this, &oldTime, &sortTimeout, &redraw, &rescan, &timedOut, &force_redraw);
}
if (redraw || force_redraw) {
ScreenManager_drawPanels(this, focus, force_redraw);
force_redraw = false;
}
int prevCh = ch;
ch = Panel_getCh(panelFocus);
HandlerResult result = IGNORED;
#ifdef HAVE_GETMOUSE
if (ch == KEY_MOUSE && this->settings->enableMouse) {
ch = ERR;
MEVENT mevent;
int ok = getmouse(&mevent);
if (ok == OK) {
if (mevent.bstate & BUTTON1_RELEASED) {
if (mevent.y == LINES - 1) {
ch = FunctionBar_synthesizeEvent(panelFocus->currentBar, mevent.x);
} else {
for (int i = 0; i < this->panelCount; i++) {
Panel* panel = (Panel*) Vector_get(this->panels, i);
if (mevent.x >= panel->x && mevent.x <= panel->x + panel->w) {
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) {
focus = i;
panelFocus = panel;
const Object* oldSelection = Panel_getSelected(panel);
Panel_setSelected(panel, mevent.y - panel->y + panel->scrollV - 1);
if (Panel_getSelected(panel) == oldSelection) {
ch = KEY_RECLICK;
}
}
break;
}
}
}
}
#if NCURSES_MOUSE_VERSION > 1
} else if (mevent.bstate & BUTTON4_PRESSED) {
ch = KEY_WHEELUP;
} else if (mevent.bstate & BUTTON5_PRESSED) {
ch = KEY_WHEELDOWN;
#endif
}
}
}
#endif
if (ch == ERR) {
if (sortTimeout > 0)
sortTimeout--;
if (prevCh == ch && !timedOut) {
closeTimeout++;
if (closeTimeout == 100) {
break;
}
} else {
closeTimeout = 0;
}
redraw = false;
continue;
}
switch (ch) {
case KEY_ALT('H'): ch = KEY_LEFT; break;
case KEY_ALT('J'): ch = KEY_DOWN; break;
case KEY_ALT('K'): ch = KEY_UP; break;
case KEY_ALT('L'): ch = KEY_RIGHT; break;
}
redraw = true;
if (Panel_eventHandlerFn(panelFocus)) {
result = Panel_eventHandler(panelFocus, ch);
}
if (result & SYNTH_KEY) {
ch = result >> 16;
}
if (result & REFRESH) {
sortTimeout = 0;
}
if (result & REDRAW) {
force_redraw = true;
}
if (result & RESIZE) {
ScreenManager_resize(this);
force_redraw = true;
}
if (result & RESCAN) {
rescan = true;
sortTimeout = 0;
}
if (result & HANDLED) {
continue;
} else if (result & BREAK_LOOP) {
quit = true;
continue;
}
switch (ch) {
case KEY_RESIZE:
{
ScreenManager_resize(this);
continue;
}
case KEY_LEFT:
case KEY_CTRL('B'):
if (this->panelCount < 2) {
goto defaultHandler;
}
if (!this->allowFocusChange) {
break;
}
tryLeft:
if (focus > 0) {
focus--;
}
panelFocus = (Panel*) Vector_get(this->panels, focus);
if (Panel_size(panelFocus) == 0 && focus > 0) {
goto tryLeft;
}
break;
case KEY_RIGHT:
case KEY_CTRL('F'):
case 9:
if (this->panelCount < 2) {
goto defaultHandler;
}
if (!this->allowFocusChange) {
break;
}
tryRight:
if (focus < this->panelCount - 1) {
focus++;
}
panelFocus = (Panel*) Vector_get(this->panels, focus);
if (Panel_size(panelFocus) == 0 && focus < this->panelCount - 1) {
goto tryRight;
}
break;
case 27:
case 'q':
case KEY_F(10):
quit = true;
continue;
default:
defaultHandler:
sortTimeout = resetSortTimeout;
Panel_onKey(panelFocus, ch);
break;
}
}
if (lastFocus) {
*lastFocus = panelFocus;
}
if (lastKey) {
*lastKey = ch;
}
}
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