htop/MetersPanel.c

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/*
htop - MetersPanel.c
(C) 2004-2011 Hisham H. Muhammad
Released under the GNU GPL, see the COPYING file
in the source distribution for its full text.
*/
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#include "MetersPanel.h"
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#include <stdlib.h>
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#include <assert.h>
#include "CRT.h"
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// Note: In code the meters are known to have bar/text/graph "Modes", but in UI
// we call them "Styles".
static const char* const MetersFunctions[] = {"Style ", "Move ", " ", "Delete", "Done ", NULL};
static const char* const MetersKeys[] = {"Space", "Enter", " ", "Del", "F10"};
static int MetersEvents[] = {' ', 13, ERR, KEY_DC, KEY_F(10)};
// We avoid UTF-8 arrows ← → here as they might display full-width on Chinese
// terminals, breaking our aligning.
// In <http://unicode.org/reports/tr11/>, arrows (U+2019..U+2199) are
// considered "Ambiguous characters".
static const char* const MetersMovingFunctions[] = {"Style ", "Lock ", "Up ", "Down ", "Left ", "Right ", " ", "Delete", "Done ", NULL};
static const char* const MetersMovingKeys[] = {"Space", "Enter", "Up", "Dn", "<-", "->", " ", "Del", "F10"};
static int MetersMovingEvents[] = {' ', 13, KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, ERR, KEY_DC, KEY_F(10)};
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static FunctionBar* Meters_movingBar = NULL;
static void MetersPanel_delete(Object* object) {
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Panel* super = (Panel*) object;
MetersPanel* this = (MetersPanel*) object;
Panel_done(super);
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free(this);
}
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void MetersPanel_setMoving(MetersPanel* this, bool moving) {
Panel* super = (Panel*) this;
this->moving = moving;
ListItem* selected = (ListItem*)Panel_getSelected(super);
if (selected) {
selected->moving = moving;
}
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if (!moving) {
Panel_setSelectionColor(super, CRT_colors[PANEL_SELECTION_FOCUS]);
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Panel_setDefaultBar(super);
} else {
Panel_setSelectionColor(super, CRT_colors[PANEL_SELECTION_FOLLOW]);
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super->currentBar = Meters_movingBar;
}
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FunctionBar_draw(this->super.currentBar, NULL);
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}
static inline bool moveToNeighbor(MetersPanel* this, MetersPanel* neighbor, int selected) {
Panel* super = (Panel*) this;
if (this->moving) {
if (neighbor) {
if (selected < Vector_size(this->meters)) {
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MetersPanel_setMoving(this, false);
Meter* meter = (Meter*) Vector_take(this->meters, selected);
Panel_remove(super, selected);
Vector_insert(neighbor->meters, selected, meter);
Panel_insert(&(neighbor->super), selected, (Object*) Meter_toListItem(meter, false));
Panel_setSelected(&(neighbor->super), selected);
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MetersPanel_setMoving(neighbor, true);
return true;
}
}
}
return false;
}
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static HandlerResult MetersPanel_eventHandler(Panel* super, int ch) {
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MetersPanel* this = (MetersPanel*) super;
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int selected = Panel_getSelectedIndex(super);
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HandlerResult result = IGNORED;
bool sideMove = false;
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switch(ch) {
case 0x0a:
case 0x0d:
case KEY_ENTER:
{
if (!Vector_size(this->meters))
break;
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MetersPanel_setMoving(this, !(this->moving));
result = HANDLED;
break;
}
case ' ':
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case KEY_F(4):
case 't':
{
if (!Vector_size(this->meters))
break;
Meter* meter = (Meter*) Vector_get(this->meters, selected);
int mode = meter->mode + 1;
if (mode == LAST_METERMODE) mode = 1;
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Meter_setMode(meter, mode);
Panel_set(super, selected, (Object*) Meter_toListItem(meter, this->moving));
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result = HANDLED;
break;
}
case KEY_UP:
{
if (!this->moving) {
break;
}
}
/* else fallthrough */
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case KEY_F(7):
case '[':
case '-':
{
Vector_moveUp(this->meters, selected);
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Panel_moveSelectedUp(super);
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result = HANDLED;
break;
}
case KEY_DOWN:
{
if (!this->moving) {
break;
}
}
/* else fallthrough */
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case KEY_F(8):
case ']':
case '+':
{
Vector_moveDown(this->meters, selected);
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Panel_moveSelectedDown(super);
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result = HANDLED;
break;
}
case KEY_RIGHT:
{
sideMove = moveToNeighbor(this, this->rightNeighbor, selected);
if (this->moving && !sideMove) {
// lock user here until it exits positioning-mode
result = HANDLED;
}
// if user is free, don't set HANDLED;
// let ScreenManager handle focus.
break;
}
case KEY_LEFT:
{
sideMove = moveToNeighbor(this, this->leftNeighbor, selected);
if (this->moving && !sideMove) {
result = HANDLED;
}
break;
}
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case KEY_F(9):
case KEY_DC:
{
if (!Vector_size(this->meters))
break;
if (selected < Vector_size(this->meters)) {
Vector_remove(this->meters, selected);
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Panel_remove(super, selected);
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}
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MetersPanel_setMoving(this, false);
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result = HANDLED;
break;
}
}
if (result == HANDLED || sideMove) {
Header* header = (Header*) this->scr->header;
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this->settings->changed = true;
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Header_calculateHeight(header);
Header_draw(header);
ScreenManager_resize(this->scr, this->scr->x1, header->height, this->scr->x2, this->scr->y2);
}
return result;
}
PanelClass MetersPanel_class = {
.super = {
.extends = Class(Panel),
.delete = MetersPanel_delete
},
.eventHandler = MetersPanel_eventHandler
};
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MetersPanel* MetersPanel_new(Settings* settings, const char* header, Vector* meters, ScreenManager* scr) {
MetersPanel* this = AllocThis(MetersPanel);
Panel* super = (Panel*) this;
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FunctionBar* fuBar = FunctionBar_new(MetersFunctions, MetersKeys, MetersEvents);
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if (!Meters_movingBar) {
Meters_movingBar = FunctionBar_new(MetersMovingFunctions, MetersMovingKeys, MetersMovingEvents);
}
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Panel_init(super, 1, 1, 1, 1, Class(ListItem), true, fuBar);
this->settings = settings;
this->meters = meters;
this->scr = scr;
this->moving = false;
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this->rightNeighbor = NULL;
this->leftNeighbor = NULL;
Panel_setHeader(super, header);
for (int i = 0; i < Vector_size(meters); i++) {
Meter* meter = (Meter*) Vector_get(meters, i);
Panel_add(super, (Object*) Meter_toListItem(meter, false));
}
return this;
}