Panel.c - htop - Rivoreo Source Code Repositories

 /*
 htop - Panel.c
 (C) 2004-2006 Hisham H. Muhammad
 Released under the GNU GPL, see the COPYING file
 in the source distribution for its full text.
 */

 #include "Object.h"
 #include "Panel.h"
 #include "Vector.h"
 #include "CRT.h"
 #include "RichString.h"

 #include <math.h>
 #include <stdbool.h>

 #include "debug.h"
 #include <assert.h>

 #include <curses.h>
 //#link curses

 /*{

 typedef struct Panel_ Panel;

 typedef enum HandlerResult_ {
    HANDLED,
    IGNORED,
    BREAK_LOOP
 } HandlerResult;

 typedef HandlerResult(*Panel_EventHandler)(Panel*, int);

 struct Panel_ {
    Object super;
    int x, y, w, h;
    WINDOW* window;
    Vector* items;
    int selected;
    int scrollV, scrollH;
    int oldSelected;
    bool needsRedraw;
    RichString header;
    Panel_EventHandler eventHandler;
 };

 }*/

 #ifndef MIN
 #define MIN(a,b) ((a)<(b)?(a):(b))
 #endif
 #ifndef MAX
 #define MAX(a,b) ((a)>(b)?(a):(b))
 #endif

 char* PANEL_CLASS = "Panel";

 Panel* Panel_new(int x, int y, int w, int h, char* type, bool owner) {
    Panel* this;
    this = malloc(sizeof(Panel));
    Panel_init(this, x, y, w, h, type, owner);
    return this;
 }

 void Panel_delete(Object* cast) {
    Panel* this = (Panel*)cast;
    Panel_done(this);
    free(this);
 }

 void Panel_init(Panel* this, int x, int y, int w, int h, char* type, bool owner) {
    Object* super = (Object*) this;
    super->class = PANEL_CLASS;
    super->delete = Panel_delete;
    this->x = x;
    this->y = y;
    this->w = w;
    this->h = h;
    this->eventHandler = NULL;
    this->items = Vector_new(type, owner, DEFAULT_SIZE);
    this->scrollV = 0;
    this->scrollH = 0;
    this->selected = 0;
    this->oldSelected = 0;
    this->needsRedraw = true;
    this->header.len = 0;
 }

 void Panel_done(Panel* this) {
    assert (this != NULL);
    RichString_delete(this->header);
    Vector_delete(this->items);
 }

 inline void Panel_setRichHeader(Panel* this, RichString header) {
    assert (this != NULL);

    if (this->header.len > 0) {
       RichString_delete(this->header);
    }
    this->header = header;
    this->needsRedraw = true;
 }

 inline void Panel_setHeader(Panel* this, char* header) {
    Panel_setRichHeader(this, RichString_quickString(CRT_colors[PANEL_HEADER_FOCUS], header));
 }

 void Panel_setEventHandler(Panel* this, Panel_EventHandler eh) {
    this->eventHandler = eh;
 }

 void Panel_move(Panel* this, int x, int y) {
    assert (this != NULL);

    this->x = x;
    this->y = y;
    this->needsRedraw = true;
 }

 void Panel_resize(Panel* this, int w, int h) {
    assert (this != NULL);

    if (this->header.len > 0)
       h--;
    this->w = w;
    this->h = h;
    this->needsRedraw = true;
 }

 void Panel_prune(Panel* this) {
    assert (this != NULL);

    Vector_prune(this->items);
    this->scrollV = 0;
    this->selected = 0;
    this->oldSelected = 0;
    this->needsRedraw = true;
 }

 void Panel_add(Panel* this, Object* o) {
    assert (this != NULL);

    Vector_add(this->items, o);
    this->needsRedraw = true;
 }

 void Panel_insert(Panel* this, int i, Object* o) {
    assert (this != NULL);

    Vector_insert(this->items, i, o);
    this->needsRedraw = true;
 }

 void Panel_set(Panel* this, int i, Object* o) {
    assert (this != NULL);

    Vector_set(this->items, i, o);
 }

 Object* Panel_get(Panel* this, int i) {
    assert (this != NULL);

    return Vector_get(this->items, i);
 }

 Object* Panel_remove(Panel* this, int i) {
    assert (this != NULL);

    this->needsRedraw = true;
    Object* removed = Vector_remove(this->items, i);
    if (this->selected > 0 && this->selected >= Vector_size(this->items))
       this->selected--;
    return removed;
 }

 Object* Panel_getSelected(Panel* this) {
    assert (this != NULL);

    return Vector_get(this->items, this->selected);
 }

 void Panel_moveSelectedUp(Panel* this) {
    assert (this != NULL);

    Vector_moveUp(this->items, this->selected);
    if (this->selected > 0)
       this->selected--;
 }

 void Panel_moveSelectedDown(Panel* this) {
    assert (this != NULL);

    Vector_moveDown(this->items, this->selected);
    if (this->selected + 1 < Vector_size(this->items))
       this->selected++;
 }

 int Panel_getSelectedIndex(Panel* this) {
    assert (this != NULL);

    return this->selected;
 }

 int Panel_getSize(Panel* this) {
    assert (this != NULL);

    return Vector_size(this->items);
 }

 void Panel_setSelected(Panel* this, int selected) {
    assert (this != NULL);

    selected = MAX(0, MIN(Vector_size(this->items) - 1, selected));
    this->selected = selected;
 }

 void Panel_draw(Panel* this, bool focus) {
    assert (this != NULL);

    int first, last;
    int itemCount = Vector_size(this->items);
    int scrollH = this->scrollH;
    int y = this->y; int x = this->x;
    first = this->scrollV;

    if (this->h > itemCount) {
       last = this->scrollV + itemCount;
       move(y + last, x + 0);
    } else {
       last = MIN(itemCount, this->scrollV + this->h);
    }
    if (this->selected < first) {
       first = this->selected;
       this->scrollV = first;
       this->needsRedraw = true;
    }
    if (this->selected >= last) {
       last = MIN(itemCount, this->selected + 1);
       first = MAX(0, last - this->h);
       this->scrollV = first;
       this->needsRedraw = true;
    }
    assert(first >= 0);
    assert(last <= itemCount);

    if (this->header.len > 0) {
       int attr = focus
                ? CRT_colors[PANEL_HEADER_FOCUS]
                : CRT_colors[PANEL_HEADER_UNFOCUS];
       attrset(attr);
       mvhline(y, x, ' ', this->w);
       if (scrollH < this->header.len) {
          mvaddchnstr(y, x, this->header.chstr + scrollH,
                      MIN(this->header.len - scrollH, this->w));
       }
       attrset(CRT_colors[RESET_COLOR]);
       y++;
    }

    int highlight = focus
                  ? CRT_colors[PANEL_HIGHLIGHT_FOCUS]
                  : CRT_colors[PANEL_HIGHLIGHT_UNFOCUS];

    if (this->needsRedraw) {

       for(int i = first, j = 0; j < this->h && i < last; i++, j++) {
          Object* itemObj = Vector_get(this->items, i);
          RichString itemRef = RichString_new();
          itemObj->display(itemObj, &itemRef);
          int amt = MIN(itemRef.len - scrollH, this->w);
          if (i == this->selected) {
             attrset(highlight);
             RichString_setAttr(&itemRef, highlight);
             mvhline(y + j, x+0, ' ', this->w);
             if (amt > 0)
                mvaddchnstr(y+j, x+0, itemRef.chstr + scrollH, amt);
             attrset(CRT_colors[RESET_COLOR]);
          } else {
             mvhline(y+j, x+0, ' ', this->w);
             if (amt > 0)
                mvaddchnstr(y+j, x+0, itemRef.chstr + scrollH, amt);
          }
       }
       for (int i = y + (last - first); i < y + this->h; i++)
          mvhline(i, x+0, ' ', this->w);
       this->needsRedraw = false;

    } else {
       Object* oldObj = Vector_get(this->items, this->oldSelected);
       RichString oldRef = RichString_new();
       oldObj->display(oldObj, &oldRef);
       Object* newObj = Vector_get(this->items, this->selected);
       RichString newRef = RichString_new();
       newObj->display(newObj, &newRef);
       mvhline(y+ this->oldSelected - this->scrollV, x+0, ' ', this->w);
       if (scrollH < oldRef.len)
          mvaddchnstr(y+ this->oldSelected - this->scrollV, x+0, oldRef.chstr + this->scrollH, MIN(oldRef.len - scrollH, this->w));
       attrset(highlight);
       mvhline(y+this->selected - this->scrollV, x+0, ' ', this->w);
       RichString_setAttr(&newRef, highlight);
       if (scrollH < newRef.len)
          mvaddchnstr(y+this->selected - this->scrollV, x+0, newRef.chstr + this->scrollH, MIN(newRef.len - scrollH, this->w));
       attrset(CRT_colors[RESET_COLOR]);
    }
    this->oldSelected = this->selected;
    move(0, 0);
 }

 void Panel_onKey(Panel* this, int key) {
    assert (this != NULL);
    switch (key) {
    case KEY_DOWN:
       if (this->selected + 1 < Vector_size(this->items))
          this->selected++;
       break;
    case KEY_UP:
       if (this->selected > 0)
          this->selected--;
       break;
    case KEY_LEFT:
       if (this->scrollH > 0) {
          this->scrollH -= 5;
          this->needsRedraw = true;
       }
       break;
    case KEY_RIGHT:
       this->scrollH += 5;
       this->needsRedraw = true;
       break;
    case KEY_PPAGE:
       this->selected -= this->h;
       if (this->selected < 0)
          this->selected = 0;
       break;
    case KEY_NPAGE:
       this->selected += this->h;
       int size = Vector_size(this->items);
       if (this->selected >= size)
          this->selected = size - 1;
       break;
    case KEY_HOME:
       this->selected = 0;
       break;
    case KEY_END:
       this->selected = Vector_size(this->items) - 1;
       break;
    }
 }
	/*
	htop - Panel.c
	(C) 2004-2006 Hisham H. Muhammad
	Released under the GNU GPL, see the COPYING file
	in the source distribution for its full text.
	*/

	#include "Object.h"
	#include "Panel.h"
	#include "Vector.h"
	#include "CRT.h"
	#include "RichString.h"

	#include <math.h>
	#include <stdbool.h>

	#include "debug.h"
	#include <assert.h>

	#include <curses.h>
	//#link curses

	/*{

	typedef struct Panel_ Panel;

	typedef enum HandlerResult_ {
	HANDLED,
	IGNORED,
	BREAK_LOOP
	} HandlerResult;

	typedef HandlerResult(Panel_EventHandler)(Panel, int);

	struct Panel_ {
	Object super;
	int x, y, w, h;
	WINDOW* window;
	Vector* items;
	int selected;
	int scrollV, scrollH;
	int oldSelected;
	bool needsRedraw;
	RichString header;
	Panel_EventHandler eventHandler;
	};

	}*/

	#ifndef MIN
	#define MIN(a,b) ((a)<(b)?(a):(b))
	#endif
	#ifndef MAX
	#define MAX(a,b) ((a)>(b)?(a):(b))
	#endif

	char* PANEL_CLASS = "Panel";

	Panel* Panel_new(int x, int y, int w, int h, char* type, bool owner) {
	Panel* this;
	this = malloc(sizeof(Panel));
	Panel_init(this, x, y, w, h, type, owner);
	return this;
	}

	void Panel_delete(Object* cast) {
	Panel* this = (Panel*)cast;
	Panel_done(this);
	free(this);
	}

	void Panel_init(Panel* this, int x, int y, int w, int h, char* type, bool owner) {
	Object* super = (Object*) this;
	super->class = PANEL_CLASS;
	super->delete = Panel_delete;
	this->x = x;
	this->y = y;
	this->w = w;
	this->h = h;
	this->eventHandler = NULL;
	this->items = Vector_new(type, owner, DEFAULT_SIZE);
	this->scrollV = 0;
	this->scrollH = 0;
	this->selected = 0;
	this->oldSelected = 0;
	this->needsRedraw = true;
	this->header.len = 0;
	}

	void Panel_done(Panel* this) {
	assert (this != NULL);
	RichString_delete(this->header);
	Vector_delete(this->items);
	}

	inline void Panel_setRichHeader(Panel* this, RichString header) {
	assert (this != NULL);

	if (this->header.len > 0) {
	RichString_delete(this->header);
	}
	this->header = header;
	this->needsRedraw = true;
	}

	inline void Panel_setHeader(Panel* this, char* header) {
	Panel_setRichHeader(this, RichString_quickString(CRT_colors[PANEL_HEADER_FOCUS], header));
	}

	void Panel_setEventHandler(Panel* this, Panel_EventHandler eh) {
	this->eventHandler = eh;
	}

	void Panel_move(Panel* this, int x, int y) {
	assert (this != NULL);

	this->x = x;
	this->y = y;
	this->needsRedraw = true;
	}

	void Panel_resize(Panel* this, int w, int h) {
	assert (this != NULL);

	if (this->header.len > 0)
	h--;
	this->w = w;
	this->h = h;
	this->needsRedraw = true;
	}

	void Panel_prune(Panel* this) {
	assert (this != NULL);

	Vector_prune(this->items);
	this->scrollV = 0;
	this->selected = 0;
	this->oldSelected = 0;
	this->needsRedraw = true;
	}

	void Panel_add(Panel* this, Object* o) {
	assert (this != NULL);

	Vector_add(this->items, o);
	this->needsRedraw = true;
	}

	void Panel_insert(Panel* this, int i, Object* o) {
	assert (this != NULL);

	Vector_insert(this->items, i, o);
	this->needsRedraw = true;
	}

	void Panel_set(Panel* this, int i, Object* o) {
	assert (this != NULL);

	Vector_set(this->items, i, o);
	}

	Object* Panel_get(Panel* this, int i) {
	assert (this != NULL);

	return Vector_get(this->items, i);
	}

	Object* Panel_remove(Panel* this, int i) {
	assert (this != NULL);

	this->needsRedraw = true;
	Object* removed = Vector_remove(this->items, i);
	if (this->selected > 0 && this->selected >= Vector_size(this->items))
	this->selected--;
	return removed;
	}

	Object* Panel_getSelected(Panel* this) {
	assert (this != NULL);

	return Vector_get(this->items, this->selected);
	}

	void Panel_moveSelectedUp(Panel* this) {
	assert (this != NULL);

	Vector_moveUp(this->items, this->selected);
	if (this->selected > 0)
	this->selected--;
	}

	void Panel_moveSelectedDown(Panel* this) {
	assert (this != NULL);

	Vector_moveDown(this->items, this->selected);
	if (this->selected + 1 < Vector_size(this->items))
	this->selected++;
	}

	int Panel_getSelectedIndex(Panel* this) {
	assert (this != NULL);

	return this->selected;
	}

	int Panel_getSize(Panel* this) {
	assert (this != NULL);

	return Vector_size(this->items);
	}

	void Panel_setSelected(Panel* this, int selected) {
	assert (this != NULL);

	selected = MAX(0, MIN(Vector_size(this->items) - 1, selected));
	this->selected = selected;
	}

	void Panel_draw(Panel* this, bool focus) {
	assert (this != NULL);

	int first, last;
	int itemCount = Vector_size(this->items);
	int scrollH = this->scrollH;
	int y = this->y; int x = this->x;
	first = this->scrollV;

	if (this->h > itemCount) {
	last = this->scrollV + itemCount;
	move(y + last, x + 0);
	} else {
	last = MIN(itemCount, this->scrollV + this->h);
	}
	if (this->selected < first) {
	first = this->selected;
	this->scrollV = first;
	this->needsRedraw = true;
	}
	if (this->selected >= last) {
	last = MIN(itemCount, this->selected + 1);
	first = MAX(0, last - this->h);
	this->scrollV = first;
	this->needsRedraw = true;
	}
	assert(first >= 0);
	assert(last <= itemCount);

	if (this->header.len > 0) {
	int attr = focus
	? CRT_colors[PANEL_HEADER_FOCUS]
	: CRT_colors[PANEL_HEADER_UNFOCUS];
	attrset(attr);
	mvhline(y, x, ' ', this->w);
	if (scrollH < this->header.len) {
	mvaddchnstr(y, x, this->header.chstr + scrollH,
	MIN(this->header.len - scrollH, this->w));
	}
	attrset(CRT_colors[RESET_COLOR]);
	y++;
	}

	int highlight = focus
	? CRT_colors[PANEL_HIGHLIGHT_FOCUS]
	: CRT_colors[PANEL_HIGHLIGHT_UNFOCUS];

	if (this->needsRedraw) {

	for(int i = first, j = 0; j < this->h && i < last; i++, j++) {
	Object* itemObj = Vector_get(this->items, i);
	RichString itemRef = RichString_new();
	itemObj->display(itemObj, &itemRef);
	int amt = MIN(itemRef.len - scrollH, this->w);
	if (i == this->selected) {
	attrset(highlight);
	RichString_setAttr(&itemRef, highlight);
	mvhline(y + j, x+0, ' ', this->w);
	if (amt > 0)
	mvaddchnstr(y+j, x+0, itemRef.chstr + scrollH, amt);
	attrset(CRT_colors[RESET_COLOR]);
	} else {
	mvhline(y+j, x+0, ' ', this->w);
	if (amt > 0)
	mvaddchnstr(y+j, x+0, itemRef.chstr + scrollH, amt);
	}
	}
	for (int i = y + (last - first); i < y + this->h; i++)
	mvhline(i, x+0, ' ', this->w);
	this->needsRedraw = false;

	} else {
	Object* oldObj = Vector_get(this->items, this->oldSelected);
	RichString oldRef = RichString_new();
	oldObj->display(oldObj, &oldRef);
	Object* newObj = Vector_get(this->items, this->selected);
	RichString newRef = RichString_new();
	newObj->display(newObj, &newRef);
	mvhline(y+ this->oldSelected - this->scrollV, x+0, ' ', this->w);
	if (scrollH < oldRef.len)
	mvaddchnstr(y+ this->oldSelected - this->scrollV, x+0, oldRef.chstr + this->scrollH, MIN(oldRef.len - scrollH, this->w));
	attrset(highlight);
	mvhline(y+this->selected - this->scrollV, x+0, ' ', this->w);
	RichString_setAttr(&newRef, highlight);
	if (scrollH < newRef.len)
	mvaddchnstr(y+this->selected - this->scrollV, x+0, newRef.chstr + this->scrollH, MIN(newRef.len - scrollH, this->w));
	attrset(CRT_colors[RESET_COLOR]);
	}
	this->oldSelected = this->selected;
	move(0, 0);
	}

	void Panel_onKey(Panel* this, int key) {
	assert (this != NULL);
	switch (key) {
	case KEY_DOWN:
	if (this->selected + 1 < Vector_size(this->items))
	this->selected++;
	break;
	case KEY_UP:
	if (this->selected > 0)
	this->selected--;
	break;
	case KEY_LEFT:
	if (this->scrollH > 0) {
	this->scrollH -= 5;
	this->needsRedraw = true;
	}
	break;
	case KEY_RIGHT:
	this->scrollH += 5;
	this->needsRedraw = true;
	break;
	case KEY_PPAGE:
	this->selected -= this->h;
	if (this->selected < 0)
	this->selected = 0;
	break;
	case KEY_NPAGE:
	this->selected += this->h;
	int size = Vector_size(this->items);
	if (this->selected >= size)
	this->selected = size - 1;
	break;
	case KEY_HOME:
	this->selected = 0;
	break;
	case KEY_END:
	this->selected = Vector_size(this->items) - 1;
	break;
	}
	}