Terminal emulator with all the bells and whistles https://www.enlightenment.org
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#include "private.h"
#include <Elementary.h>
#include <stdio.h>
#include <assert.h>
#include <math.h>
#include "colors.h"
#include "termpty.h"
#include "termio.h"
#include "termiointernals.h"
#include "miniview.h"
#include "theme.h"
#include "main.h"
#include "backlog.h"
/* specific log domain to help debug only miniview */
int _miniview_log_dom = -1;
#undef CRITICAL
#undef ERR
#undef WRN
#undef INF
#undef DBG
#define CRIT(...) EINA_LOG_DOM_CRIT(_miniview_log_dom, __VA_ARGS__)
#define ERR(...) EINA_LOG_DOM_ERR(_miniview_log_dom, __VA_ARGS__)
#define WRN(...) EINA_LOG_DOM_WARN(_miniview_log_dom, __VA_ARGS__)
#define INF(...) EINA_LOG_DOM_INFO(_miniview_log_dom, __VA_ARGS__)
#define DBG(...) EINA_LOG_DOM_DBG(_miniview_log_dom, __VA_ARGS__)
static Eina_Bool _deferred_renderer(void *data);
void
miniview_init(void)
{
if (_miniview_log_dom >= 0) return;
_miniview_log_dom = eina_log_domain_register("miniview", NULL);
if (_miniview_log_dom < 0)
EINA_LOG_CRIT(_("Could not create logging domain '%s'"), "miniview");
}
void
miniview_shutdown(void)
{
if (_miniview_log_dom < 0) return;
eina_log_domain_unregister(_miniview_log_dom);
_miniview_log_dom = -1;
}
typedef struct tag_Miniview Miniview;
struct tag_Miniview
{
Evas_Object *self;
Evas_Object *base;
Evas_Object *img;
Evas_Object *termio;
int img_hist; /* history rendered is between img_hist (<0) and
img_hist + img_h */
unsigned img_h;
unsigned rows;
unsigned cols;
Ecore_Timer *deferred_renderer;
unsigned int is_shown : 1;
unsigned int to_render : 1;
unsigned int initial_pos : 1;
Eina_Bool fits_to_img;
struct _screen {
double size;
double pos_val;
}screen;
};
static Evas_Smart *_smart = NULL;
static void
_draw_cell(const Termpty *ty, unsigned int *pixel, const Termcell *cell, unsigned int *colors)
{
int fg, bg, fgext, bgext;
int inv = ty->termstate.reverse;
Eina_Unicode codepoint;
codepoint = cell->codepoint;
if ((codepoint == 0) || (cell->att.newline) || (cell->att.invisible))
{
*pixel = 0;
return;
}
// colors
fg = cell->att.fg;
bg = cell->att.bg;
fgext = cell->att.fg256;
bgext = cell->att.bg256;
if ((fg == COL_DEF) && (cell->att.inverse ^ inv)) fg = COL_INVERSEBG;
if (bg == COL_DEF)
{
if (cell->att.inverse ^ inv) bg = COL_INVERSE;
else if (!bgext) bg = COL_INVIS;
}
if ((cell->att.fgintense) && (!fgext)) fg += 48;
if ((cell->att.bgintense) && (!bgext)) bg += 48;
if (cell->att.inverse ^ inv)
{
int t;
t = fgext; fgext = bgext; bgext = t;
t = fg; fg = bg; bg = t;
}
if ((cell->att.bold) && (!fgext)) fg += 12;
if ((cell->att.faint) && (!fgext)) fg += 24;
if (bgext) *pixel = colors[bg + 256];
else if (bg && ((bg % 12) != COL_INVIS)) *pixel = colors[bg];
else if ((codepoint > 32) && (codepoint < 0x00110000))
{
if (fgext) *pixel = colors[fg + 256];
else *pixel = colors[fg];
}
else
*pixel = 0;
}
static void
_draw_line(const Termpty *ty, unsigned int *pixels,
const Termcell *cells, int length, unsigned int *colors)
{
int x;
for (x = 0 ; x < length; x++)
{
_draw_cell(ty, pixels + x, cells + x, colors);
}
}
Eina_Bool
_is_top_bottom_reached(Miniview *mv)
{
int history_len;
Termpty *ty;
EINA_SAFETY_ON_NULL_RETURN_VAL(mv, EINA_FALSE);
ty = termio_pty_get(mv->termio);
EINA_SAFETY_ON_NULL_RETURN_VAL(ty, EINA_FALSE);
history_len = termpty_backlog_length(ty);
if (( (- mv->img_hist) > (int)(mv->img_h - mv->rows - (mv->rows / 2))) &&
( (- mv->img_hist) < (int)(history_len + (mv->rows / 2))))
return EINA_FALSE;
return EINA_TRUE;
}
static void
_screen_visual_bounds(Miniview *mv)
{
if ((mv->screen.pos_val > 1) || (mv->screen.pos_val < 0))
{
edje_object_part_drag_value_set(mv->base, "miniview_screen",
0.0, mv->screen.pos_val);
edje_object_signal_emit(mv->base, "miniview_screen,outbounds",
"miniview");
}
else
{
edje_object_part_drag_value_set(mv->base, "miniview_screen",
0.0, mv->screen.pos_val);
edje_object_signal_emit(mv->base, "miniview_screen,inbounds",
"miniview");
}
}
static void
_queue_render(Miniview *mv)
{
mv->to_render = 1;
if ((!mv->deferred_renderer) && (mv->is_shown))
mv->deferred_renderer = ecore_timer_add(0.1, _deferred_renderer, mv);
}
static void
_smart_cb_mouse_wheel(void *data,
Evas *_e EINA_UNUSED,
Evas_Object *_obj EINA_UNUSED,
void *event)
{
Evas_Event_Mouse_Wheel *ev = event;
Miniview *mv = evas_object_smart_data_get(data);
EINA_SAFETY_ON_NULL_RETURN(mv);
/* do not handle horizontal scrolling */
if (ev->direction) return;
mv->img_hist += ev->z * 25;
if (!mv->fits_to_img && !_is_top_bottom_reached(mv))
{
mv->screen.pos_val = mv->screen.pos_val -
(double) (ev->z * 25) / (mv->img_h - mv->rows);
_screen_visual_bounds(mv);
}
_queue_render(mv);
}
void
miniview_position_offset(const Evas_Object *obj, int by, Eina_Bool sanitize)
{
Miniview *mv = evas_object_smart_data_get(obj);
termio_scroll_get(mv->termio);
EINA_SAFETY_ON_NULL_RETURN(mv);
if ((mv->screen.pos_val <= 1.0) && (mv->screen.pos_val >= 0.0))
edje_object_signal_emit(mv->base, "miniview_screen,inbounds", "miniview");
if (!mv->fits_to_img)
{
int remain;
mv->screen.pos_val += (double) by / (mv->img_h - mv->rows);
edje_object_part_drag_value_set(mv->base, "miniview_screen",
0.0, mv->screen.pos_val);
if ((mv->screen.pos_val <= 0) && (sanitize))
{
/* This is what remains when screen pos has to
go negative by some portion "by" */
remain = (int) round(mv->screen.pos_val * (mv->img_h - mv->rows));
mv->img_hist += remain;
mv->screen.pos_val = 0;
}
if ((mv->screen.pos_val > 1) && (sanitize))
{
remain = (int) round((1 - mv->screen.pos_val) *
(mv->img_h - mv->rows));
mv->img_hist -= remain;
mv->screen.pos_val = 1;
}
}
else
{
if (sanitize)
{
mv->screen.pos_val += (double) by / (mv->img_h - mv->rows);
edje_object_part_drag_value_set(mv->base, "miniview_screen",
0.0, mv->screen.pos_val);
if (mv->screen.pos_val < 0) mv->screen.pos_val = 0;
if (mv->screen.pos_val > 1) mv->screen.pos_val = 1;
}
}
}
Eina_Bool
miniview_handle_key(Evas_Object *obj, const Evas_Event_Key_Down *ev)
{
Miniview *mv;
Evas_Coord ox, oy, ow, oh, mx, my;
int z = 25;
EINA_SAFETY_ON_NULL_RETURN_VAL(obj, EINA_FALSE);
mv = evas_object_smart_data_get(obj);
if ((!mv) || (!mv->is_shown)) return EINA_FALSE;
evas_object_geometry_get(mv->img, &ox, &oy, &ow, &oh);
evas_pointer_canvas_xy_get(evas_object_evas_get(mv->base), &mx, &my);
if ((mx < ox) || (mx > ox + ow) || (my < oy) || (my > oy + oh))
return EINA_FALSE;
if (evas_key_modifier_is_set(ev->modifiers, "Alt") ||
evas_key_modifier_is_set(ev->modifiers, "Shift") ||
evas_key_modifier_is_set(ev->modifiers, "Control"))
z = mv->img_h;
if (!strcmp(ev->key, "Prior"))
{
if (!mv->fits_to_img)
{
mv->img_hist -= z;
if (_is_top_bottom_reached(mv))
{
miniview_position_offset(obj, -z, EINA_FALSE);
}
miniview_position_offset(obj, z, EINA_FALSE);
_screen_visual_bounds(mv);
}
_queue_render(mv);
return EINA_TRUE;
}
else if (!strcmp(ev->key, "Next"))
{
if (!mv->fits_to_img)
{
mv->img_hist += z;
if (_is_top_bottom_reached(mv))
{
miniview_position_offset(obj, z, EINA_FALSE);
}
miniview_position_offset(obj, -z, EINA_FALSE);
_screen_visual_bounds(mv);
}
_queue_render(mv);
return EINA_TRUE;
}
return EINA_FALSE;
}
static void
_smart_cb_mouse_down(void *data,
Evas *_e EINA_UNUSED,
Evas_Object *_obj EINA_UNUSED,
void *event)
{
Evas_Event_Mouse_Down *ev = event;
Miniview *mv= evas_object_smart_data_get(data);
int pos, pos2;
Evas_Coord oy;
EINA_SAFETY_ON_NULL_RETURN(mv);
evas_object_geometry_get(mv->img, NULL, &oy, NULL, NULL);
pos = oy - ev->canvas.y;
pos -= mv->img_hist;
if (pos < 0) pos = 0;
else pos += mv->rows / 2;
termio_scroll_set(mv->termio, pos);
pos2 = ev->canvas.y - oy - (mv->rows / 2);
if (pos2 < 0) pos2 = 0;
if (pos2 > -mv->img_hist) pos2 = -mv->img_hist;
mv->screen.pos_val = (double) pos2 / (mv->img_h - mv->rows);
edje_object_part_drag_value_set(mv->base, "miniview_screen", 0.0, mv->screen.pos_val);
_screen_visual_bounds(mv);
}
static void
_on_screen_stoped(void *data,
Evas_Object *_o EINA_UNUSED,
const char *_emission EINA_UNUSED,
const char *_source EINA_UNUSED)
{
Miniview *mv= evas_object_smart_data_get(data);
EINA_SAFETY_ON_NULL_RETURN(mv);
edje_object_part_drag_value_set(mv->base, "miniview_screen", 0.0,
mv->screen.pos_val);
}
static void
_on_screen_moved(void *data,
Evas_Object *o,
const char *_emission EINA_UNUSED,
const char *_source EINA_UNUSED)
{
Miniview *mv = evas_object_smart_data_get(data);
double val = 0.0, pos = 0.0, bottom_bound = 0.0;
edje_object_part_drag_value_get(o, "miniview_screen", NULL, &val);
bottom_bound = ((double) (-mv->img_hist )) / (mv->img_h - mv->rows);
if (!mv->fits_to_img)
{
pos = (bottom_bound - val) * (mv->img_h - mv->rows);
mv->screen.pos_val = val;
}
else
{
bottom_bound = ((double) (-mv->img_hist )) / (mv->img_h - mv->rows);
pos = (bottom_bound - val) * (mv->img_h - mv->rows);
if (val < bottom_bound)
mv->screen.pos_val = val;
if (val > bottom_bound)
{
mv->screen.pos_val = bottom_bound;
pos = 0;
}
}
termio_scroll_set(mv->termio, (int) pos);
_screen_visual_bounds(mv);
}
static void
_smart_add(Evas_Object *obj)
{
Miniview *mv;
mv = calloc(1, sizeof(Miniview));
EINA_SAFETY_ON_NULL_RETURN(mv);
evas_object_smart_data_set(obj, mv);
mv->self = obj;
}
static void
_smart_del(Evas_Object *obj)
{
Miniview *mv = evas_object_smart_data_get(obj);
if (!mv) return;
ecore_timer_del(mv->deferred_renderer);
evas_object_del(mv->base);
evas_object_del(mv->img);
free(mv);
}
static void
_do_configure(Evas_Object *obj)
{
Miniview *mv = evas_object_smart_data_get(obj);
Evas_Coord ox, oy, ow, oh, font_w, font_h, w;
if (!mv) return;
evas_object_geometry_get(mv->termio, &ox, &oy, &ow, &oh);
evas_object_size_hint_min_get(mv->termio, &font_w, &font_h);
if ((font_w <= 0) || (font_h <= 0) || (ow == 0) || (oh == 0)) return;
mv->img_h = oh;
mv->rows = oh / font_h;
mv->cols = ow / font_w;
if ((mv->rows == 0) || (mv->cols == 0)) return;
mv->screen.size = (double) mv->rows / (double) mv->img_h;
edje_object_part_drag_size_set(mv->base, "miniview_screen", 1.0, mv->screen.size);
w = (mv->cols * font_w) / font_h;
evas_object_resize(mv->base, w, mv->img_h);
evas_object_move(mv->base, ox + ow - w, oy);
}
static void
_smart_move(Evas_Object *obj,
Evas_Coord _x EINA_UNUSED,
Evas_Coord _y EINA_UNUSED)
{
Miniview *mv = evas_object_smart_data_get(obj);
if (!mv) return;
_do_configure(obj);
_queue_render(mv);
}
static void
_smart_show(Evas_Object *obj)
{
Miniview *mv = evas_object_smart_data_get(obj);
if (!mv) return;
if (!mv->is_shown)
{
mv->is_shown = 1;
mv->img_hist = 0;
mv->initial_pos = 1;
_queue_render(mv);
evas_object_show(mv->base);
}
}
static void
_smart_hide(Evas_Object *obj)
{
Miniview *mv = evas_object_smart_data_get(obj);
if (!mv) return;
if (mv->is_shown)
{
mv->is_shown = 0;
evas_object_hide(mv->base);
}
}
void
miniview_redraw(const Evas_Object *obj)
{
Miniview *mv;
if (!obj) return;
mv = evas_object_smart_data_get(obj);
if ((!mv) || (!mv->is_shown)) return;
_queue_render(mv);
}
static void
miniview_colors_get(Miniview *mv, unsigned int *colors)
{
Evas_Object *tg = termio_textgrid_get(mv->termio);
int r, g, b, a, c;
for (c = 0; c < 256; c++)
{
evas_object_textgrid_palette_get
(tg, EVAS_TEXTGRID_PALETTE_STANDARD, c, &r, &g, &b, &a);
colors[c] = (a << 24) | (r << 16) | (g << 8) | b;
}
for (c = 0; c < 256; c++)
{
evas_object_textgrid_palette_get
(tg, EVAS_TEXTGRID_PALETTE_EXTENDED, c, &r, &g, &b, &a);
colors[c + 256] = (a << 24) | (r << 16) | (g << 8) | b;
}
}
static Eina_Bool
_deferred_renderer(void *data)
{
Miniview *mv = data;
Evas_Coord ox, oy, ow, oh;
int history_len, pos;
ssize_t wret;
unsigned int *pixels, y;
Termpty *ty;
unsigned int colors[512];
double bottom_bound;
if (!mv) return EINA_FALSE;
if ((!mv->is_shown) || (!mv->to_render) || (mv->img_h == 0))
{
mv->deferred_renderer = NULL;
return EINA_FALSE;
}
miniview_colors_get(mv, colors);
ty = termio_pty_get(mv->termio);
EINA_SAFETY_ON_NULL_RETURN_VAL(ty, EINA_FALSE);
evas_object_geometry_get(mv->termio, &ox, &oy, &ow, &oh);
if ((ow == 0) || (oh == 0) || (mv->cols == 1)) return EINA_TRUE;
history_len = termpty_backlog_length(ty);
evas_object_image_size_set(mv->img, mv->cols, mv->img_h);
ow = mv->cols;
oh = mv->img_h;
pixels = evas_object_image_data_get(mv->img, EINA_TRUE);
memset(pixels, 0, sizeof(*pixels) * ow * oh);
mv->img_h = oh;
/* "current"? */
if (mv->img_hist >= - ((int)mv->img_h - (int)mv->rows))
mv->img_hist = -((int)mv->img_h - (int)mv->rows);
if (mv->img_hist < -history_len)
mv->img_hist = -history_len;
for (y = 0; y < mv->img_h; y++)
{
Termcell *cells = termpty_cellrow_get(ty, mv->img_hist + y, &wret);
if (!cells)
break;
_draw_line(ty, &pixels[y * mv->cols], cells, wret, colors);
}
evas_object_image_data_set(mv->img, pixels);
evas_object_image_pixels_dirty_set(mv->img, EINA_FALSE);
evas_object_image_data_update_add(mv->img, 0, 0, ow, oh);
if (history_len > (int)(mv->img_h - mv->rows)) mv->fits_to_img = EINA_FALSE;
else mv->fits_to_img = EINA_TRUE;
bottom_bound = ((double) (-mv->img_hist )) / (mv->img_h - mv->rows);
pos = termio_scroll_get(mv->termio);
if ((pos != 0) && (mv->initial_pos))
{
double val;
val = (double) pos / (mv->img_h - mv->rows);
if ((mv->fits_to_img))
{
mv->screen.pos_val = bottom_bound - val;
mv->initial_pos = 0;
}
else
{
if (val > 1)
{
mv->img_hist += (mv->img_hist * (int)val);
mv->screen.pos_val = (double)(1 - ( val - (int) val));
mv->initial_pos = 0;
mv->to_render = 1;
return EINA_TRUE;
}
else
{
mv->screen.pos_val = bottom_bound - val;
mv->initial_pos = 0;
}
}
}
if (pos == 0)
mv->screen.pos_val = bottom_bound;
edje_object_part_drag_value_set(mv->base, "miniview_screen", 0.0, mv->screen.pos_val);
mv->to_render = 0;
mv->deferred_renderer = NULL;
_screen_visual_bounds(mv);
return EINA_FALSE;
}
static void
_smart_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
{
Evas_Coord font_w, font_h, ox, oy;
Miniview *mv = evas_object_smart_data_get(obj);
if (!mv) return;
mv->img_h = h;
evas_object_geometry_get(mv->termio, &ox, &oy, NULL, NULL);
evas_object_size_hint_min_get(mv->termio, &font_w, &font_h);
if ((font_w <= 0) || (font_h <= 0)) return;
mv->rows = h / font_h;
mv->cols = w / font_w;
if ((mv->rows == 0) || (mv->cols == 0)) return;
_do_configure(obj);
_queue_render(mv);
}
static void
_smart_init(void)
{
static Evas_Smart_Class sc = EVAS_SMART_CLASS_INIT_NULL;
sc.name = "miniview";
sc.version = EVAS_SMART_CLASS_VERSION;
sc.add = _smart_add;
sc.del = _smart_del;
sc.resize = _smart_resize;
sc.move = _smart_move;
sc.show = _smart_show;
sc.hide = _smart_hide;
_smart = evas_smart_class_new(&sc);
}
static void
_cb_miniview_close(void *data,
Evas_Object *_obj EINA_UNUSED,
const char *_sig EINA_UNUSED,
const char *_src EINA_UNUSED)
{
Miniview *mv = data;
EINA_SAFETY_ON_NULL_RETURN(mv);
EINA_SAFETY_ON_NULL_RETURN(mv->termio);
if (mv->is_shown) term_miniview_hide(termio_term_get(mv->termio));
}
Evas_Object *
miniview_add(Evas_Object *parent, Evas_Object *termio)
{
Evas *e;
Evas_Object *obj, *o;
Miniview *mv;
Evas *canvas = evas_object_evas_get(parent);
EINA_SAFETY_ON_NULL_RETURN_VAL(parent, NULL);
e = evas_object_evas_get(parent);
if (!e) return NULL;
if (!_smart) _smart_init();
obj = evas_object_smart_add(e, _smart);
mv = evas_object_smart_data_get(obj);
if (!mv) return obj;
mv->termio = termio;
mv->base = edje_object_add(canvas);
theme_apply(mv->base, termio_config_get(termio), "terminology/miniview",
NULL, NULL, EINA_FALSE);
evas_object_smart_member_add(mv->base, obj);
/* miniview output widget */
o = evas_object_image_filled_add(canvas);
evas_object_image_alpha_set(o, EINA_TRUE);
edje_object_part_swallow(mv->base, "miniview.img", o);
evas_object_show(o);
mv->img = o;
evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_WHEEL,
_smart_cb_mouse_wheel, obj);
evas_object_event_callback_add(o, EVAS_CALLBACK_MOUSE_DOWN,
_smart_cb_mouse_down, obj);
edje_object_signal_callback_add(mv->base, "miniview,close", "terminology",
_cb_miniview_close, mv);
edje_object_signal_callback_add(mv->base, "drag", "miniview_screen",
_on_screen_moved, obj);
edje_object_signal_callback_add(mv->base, "drag,stop", "miniview_screen",
_on_screen_stoped, obj);
return obj;
}