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image.c

/* $Id: image.c,v 1.36 2003/07/07 15:49:03 ukai Exp $ */

#include "fm.h"
#include <sys/types.h>
#include <sys/stat.h>
#include <signal.h>
#include <errno.h>
#include <unistd.h>
#ifdef HAVE_WAITPID
#include <sys/wait.h>
#endif

#ifdef USE_IMAGE

static int image_index = 0;

/* display image */

typedef struct _termialImage {
    ImageCache *cache;
    short x;
    short y;
    short sx;
    short sy;
    short width;
    short height;
} TerminalImage;

static TerminalImage *terminal_image = NULL;
static int n_terminal_image = 0;
static int max_terminal_image = 0;
static FILE *Imgdisplay_rf = NULL, *Imgdisplay_wf = NULL;
static pid_t Imgdisplay_pid = 0;
static int openImgdisplay();
static void closeImgdisplay();
int getCharSize();

void
initImage()
{
    if (activeImage)
      return;
    if (getCharSize())
      activeImage = TRUE;
}

int
getCharSize()
{
    FILE *f;
    Str tmp;
    int w = 0, h = 0;

    set_environ("W3M_TTY", ttyname_tty());
    tmp = Strnew();
    if (!strchr(Imgdisplay, '/'))
      Strcat_m_charp(tmp, w3m_auxbin_dir(), "/", NULL);
    Strcat_m_charp(tmp, Imgdisplay, " -test 2>/dev/null", NULL);
    f = popen(tmp->ptr, "r");
    if (!f)
      return FALSE;
    while (fscanf(f, "%d %d", &w, &h) < 0) {
      if (feof(f))
          break;
    }
    pclose(f);

    if (!(w > 0 && h > 0))
      return FALSE;
    if (!set_pixel_per_char)
      pixel_per_char = (int)(1.0 * w / COLS + 0.5);
    if (!set_pixel_per_line)
      pixel_per_line = (int)(1.0 * h / LINES + 0.5);
    return TRUE;
}

void
termImage()
{
    if (!activeImage)
      return;
    clearImage();
    if (Imgdisplay_wf) {
      fputs("2;\n", Imgdisplay_wf); /* ClearImage() */
      fflush(Imgdisplay_wf);
    }
    closeImgdisplay();
}

static int
openImgdisplay()
{
    Imgdisplay_pid = open_pipe_rw(&Imgdisplay_rf, &Imgdisplay_wf);
    if (Imgdisplay_pid < 0)
      goto err0;
    if (Imgdisplay_pid == 0) {
      /* child */
      char *cmd;
      setup_child(FALSE, 2, -1);
      if (!strchr(Imgdisplay, '/'))
          cmd = Strnew_m_charp(w3m_auxbin_dir(), "/", Imgdisplay, NULL)->ptr;
      else
          cmd = Imgdisplay;
      myExec(cmd);
      /* XXX: ifdef __EMX__, use start /f ? */
    }
    activeImage = TRUE;
    return TRUE;
  err0:
    Imgdisplay_pid = 0;
    activeImage = FALSE;
    return FALSE;
}

static void
closeImgdisplay()
{
    if (Imgdisplay_rf)
      fclose(Imgdisplay_rf);
    if (Imgdisplay_wf)
      fclose(Imgdisplay_wf);
    if (Imgdisplay_pid)
      kill(Imgdisplay_pid, SIGKILL);
    Imgdisplay_rf = NULL;
    Imgdisplay_wf = NULL;
    Imgdisplay_pid = 0;
}

void
addImage(ImageCache * cache, int x, int y, int sx, int sy, int w, int h)
{
    TerminalImage *i;

    if (!activeImage)
      return;
    if (n_terminal_image >= max_terminal_image) {
      max_terminal_image = max_terminal_image ? (2 * max_terminal_image) : 8;
      terminal_image = New_Reuse(TerminalImage, terminal_image,
                           max_terminal_image);
    }
    i = &terminal_image[n_terminal_image];
    i->cache = cache;
    i->x = x;
    i->y = y;
    i->sx = sx;
    i->sy = sy;
    i->width = w;
    i->height = h;
    n_terminal_image++;
}

static void
syncImage(void)
{
    fputs("3;\n", Imgdisplay_wf);   /* XSync() */
    fputs("4;\n", Imgdisplay_wf);   /* put '\n' */
    while (fflush(Imgdisplay_wf) != 0) {
      if (ferror(Imgdisplay_wf))
          goto err;
    }
    if (!fgetc(Imgdisplay_rf))
      goto err;
    return;
  err:
    closeImgdisplay();
    image_index += MAX_IMAGE;
    n_terminal_image = 0;
}

void
drawImage()
{
    static char buf[64];
    int j, draw = FALSE;
    TerminalImage *i;

    if (!activeImage)
      return;
    if (!n_terminal_image)
      return;
    for (j = 0; j < n_terminal_image; j++) {
      i = &terminal_image[j];
      if (!(i->cache->loaded & IMG_FLAG_LOADED &&
            i->width > 0 && i->height > 0))
          continue;
      if (!(Imgdisplay_rf && Imgdisplay_wf)) {
          if (!openImgdisplay())
            return;
      }
      if (i->cache->index > 0) {
          i->cache->index *= -1;
          fputs("0;", Imgdisplay_wf);     /* DrawImage() */
      }
      else
          fputs("1;", Imgdisplay_wf);     /* DrawImage(redraw) */
      sprintf(buf, "%d;%d;%d;%d;%d;%d;%d;%d;%d;",
            (-i->cache->index - 1) % MAX_IMAGE + 1, i->x, i->y,
            (i->cache->width > 0) ? i->cache->width : 0,
            (i->cache->height > 0) ? i->cache->height : 0,
            i->sx, i->sy, i->width, i->height);
      fputs(buf, Imgdisplay_wf);
      fputs(i->cache->file, Imgdisplay_wf);
      fputs("\n", Imgdisplay_wf);
      draw = TRUE;
    }
    if (!draw)
      return;
    syncImage();
    touch_cursor();
    refresh();
}

void
clearImage()
{
    static char buf[64];
    int j;
    TerminalImage *i;

    if (!activeImage)
      return;
    if (!n_terminal_image)
      return;
    if (!Imgdisplay_wf) {
      n_terminal_image = 0;
      return;
    }
    for (j = 0; j < n_terminal_image; j++) {
      i = &terminal_image[j];
      if (!(i->cache->loaded & IMG_FLAG_LOADED &&
            i->width > 0 && i->height > 0))
          continue;
      sprintf(buf, "6;%d;%d;%d;%d\n", i->x, i->y, i->width, i->height);
      fputs(buf, Imgdisplay_wf);
    }
    syncImage();
    n_terminal_image = 0;
}

/* load image */

#ifndef MAX_LOAD_IMAGE
#define MAX_LOAD_IMAGE 8
#endif
static int n_load_image = 0;
static Hash_sv *image_hash = NULL;
static Hash_sv *image_file = NULL;
static GeneralList *image_list = NULL;
static ImageCache **image_cache = NULL;
static Buffer *image_buffer = NULL;

void
deleteImage(Buffer *buf)
{
    AnchorList *al;
    Anchor *a;
    int i;

    if (!buf)
      return;
    al = buf->img;
    if (!al)
      return;
    for (i = 0, a = al->anchors; i < al->nanchor; i++, a++) {
      if (a->image && a->image->cache &&
          a->image->cache->loaded != IMG_FLAG_UNLOADED &&
          !(a->image->cache->loaded & IMG_FLAG_DONT_REMOVE) &&
          a->image->cache->index < 0)
          unlink(a->image->cache->file);
    }
    loadImage(NULL, IMG_FLAG_STOP);
}

void
getAllImage(Buffer *buf)
{
    AnchorList *al;
    Anchor *a;
    ParsedURL *current;
    int i;

    image_buffer = buf;
    if (!buf)
      return;
    buf->image_loaded = TRUE;
    al = buf->img;
    if (!al)
      return;
    current = baseURL(buf);
    for (i = 0, a = al->anchors; i < al->nanchor; i++, a++) {
      if (a->image) {
          a->image->cache = getImage(a->image, current, buf->image_flag);
          if (a->image->cache &&
            a->image->cache->loaded == IMG_FLAG_UNLOADED)
            buf->image_loaded = FALSE;
      }
    }
}

void
showImageProgress(Buffer *buf)
{
    AnchorList *al;
    Anchor *a;
    int i, l, n;

    if (!buf)
      return;
    al = buf->img;
    if (!al)
      return;
    for (i = 0, l = 0, n = 0, a = al->anchors; i < al->nanchor; i++, a++) {
      if (a->image && a->hseq >= 0) {
          n++;
          if (a->image->cache && a->image->cache->loaded & IMG_FLAG_LOADED)
            l++;
      }
    }
    if (n) {
      message(Sprintf("%d/%d images loaded", l, n)->ptr,
            buf->cursorX + buf->rootX, buf->cursorY + buf->rootY);
      refresh();
    }
}

void
loadImage(Buffer *buf, int flag)
{
    ImageCache *cache;
    struct stat st;
    int i, draw = FALSE;
    /* int wait_st; */

    if (maxLoadImage > MAX_LOAD_IMAGE)
      maxLoadImage = MAX_LOAD_IMAGE;
    else if (maxLoadImage < 1)
      maxLoadImage = 1;
    if (n_load_image == 0)
      n_load_image = maxLoadImage;
    if (!image_cache) {
      image_cache = New_N(ImageCache *, MAX_LOAD_IMAGE);
      bzero(image_cache, sizeof(ImageCache *) * MAX_LOAD_IMAGE);
    }
    for (i = 0; i < n_load_image; i++) {
      cache = image_cache[i];
      if (!cache)
          continue;
      if (lstat(cache->touch, &st))
          continue;
      if (cache->pid) {
          kill(cache->pid, SIGKILL);
          /*
           * #ifdef HAVE_WAITPID
           * waitpid(cache->pid, &wait_st, 0);
           * #else
           * wait(&wait_st);
           * #endif
           */
          cache->pid = 0;
      }
      if (!stat(cache->file, &st)) {
          cache->loaded = IMG_FLAG_LOADED;
          if (getImageSize(cache)) {
            if (image_buffer)
                image_buffer->need_reshape = TRUE;
          }
          draw = TRUE;
      }
      else
          cache->loaded = IMG_FLAG_ERROR;
      unlink(cache->touch);
      image_cache[i] = NULL;
    }

    for (i = (buf != image_buffer) ? 0 : maxLoadImage; i < n_load_image; i++) {
      cache = image_cache[i];
      if (!cache)
          continue;
      if (cache->pid) {
          kill(cache->pid, SIGKILL);
          /*
           * #ifdef HAVE_WAITPID
           * waitpid(cache->pid, &wait_st, 0);
           * #else
           * wait(&wait_st);
           * #endif
           */
          cache->pid = 0;
      }
      unlink(cache->touch);
      image_cache[i] = NULL;
    }

    if (flag == IMG_FLAG_STOP) {
      image_list = NULL;
      image_file = NULL;
      n_load_image = maxLoadImage;
      image_buffer = NULL;
      return;
    }

    if (draw && image_buffer) {
      drawImage();
      showImageProgress(image_buffer);
    }

    image_buffer = buf;

    if (!image_list)
      return;
    for (i = 0; i < n_load_image; i++) {
      if (image_cache[i])
          continue;
      while (1) {
          cache = (ImageCache *) popValue(image_list);
          if (!cache) {
            for (i = 0; i < n_load_image; i++) {
                if (image_cache[i])
                  return;
            }
            image_list = NULL;
            image_file = NULL;
            if (image_buffer)
                displayBuffer(image_buffer, B_NORMAL);
            return;
          }
          if (cache->loaded == IMG_FLAG_UNLOADED)
            break;
      }
      image_cache[i] = cache;

      flush_tty();
      if ((cache->pid = fork()) == 0) {
          Buffer *b;
          /*
           * setup_child(TRUE, 0, -1);
           */
          setup_child(FALSE, 0, -1);
          image_source = cache->file;
          b = loadGeneralFile(cache->url, cache->current, NULL, 0, NULL);
          if (!b || !b->real_type || strncasecmp(b->real_type, "image/", 6))
            unlink(cache->file);
#if defined(HAVE_SYMLINK) && defined(HAVE_LSTAT)
          symlink(cache->file, cache->touch);
#else
          {
            FILE *f = fopen(cache->touch, "w");
            if (f)
                fclose(f);
          }
#endif
          exit(0);
      }
      else if (cache->pid < 0) {
          cache->pid = 0;
          return;
      }
    }
}

ImageCache *
getImage(Image * image, ParsedURL *current, int flag)
{
    Str key = NULL;
    ImageCache *cache;

    if (!activeImage)
      return NULL;
    if (!image_hash)
      image_hash = newHash_sv(100);
    if (image->cache)
      cache = image->cache;
    else {
      key = Sprintf("%d;%d;%s", image->width, image->height, image->url);
      cache = (ImageCache *) getHash_sv(image_hash, key->ptr, NULL);
    }
    if (cache && cache->index && abs(cache->index) <= image_index - MAX_IMAGE) {
      struct stat st;
      if (stat(cache->file, &st))
          cache->loaded = IMG_FLAG_UNLOADED;
      cache->index = 0;
    }

    if (!cache) {
      if (flag == IMG_FLAG_SKIP)
          return NULL;

      cache = New(ImageCache);
      cache->url = image->url;
      cache->current = current;
      cache->file = tmpfname(TMPF_DFL, image->ext)->ptr;
      cache->touch = tmpfname(TMPF_DFL, NULL)->ptr;
      cache->pid = 0;
      cache->index = 0;
      cache->loaded = IMG_FLAG_UNLOADED;
      cache->width = image->width;
      cache->height = image->height;
      putHash_sv(image_hash, key->ptr, (void *)cache);
    }
    if (flag != IMG_FLAG_SKIP) {
      if (cache->loaded == IMG_FLAG_UNLOADED) {
          if (!image_file)
            image_file = newHash_sv(100);
          if (!getHash_sv(image_file, cache->file, NULL)) {
            putHash_sv(image_file, cache->file, (void *)cache);
            if (!image_list)
                image_list = newGeneralList();
            pushValue(image_list, (void *)cache);
          }
      }
      if (!cache->index)
          cache->index = ++image_index;
    }
    if (cache->loaded & IMG_FLAG_LOADED)
      getImageSize(cache);
    return cache;
}

int
getImageSize(ImageCache * cache)
{
    Str tmp;
    FILE *f;
    int w = 0, h = 0;

    if (!activeImage)
      return FALSE;
    if (!cache || !(cache->loaded & IMG_FLAG_LOADED) ||
      (cache->width > 0 && cache->height > 0))
      return FALSE;
    tmp = Strnew();
    if (!strchr(Imgdisplay, '/'))
      Strcat_m_charp(tmp, w3m_auxbin_dir(), "/", NULL);
    Strcat_m_charp(tmp, Imgdisplay, " -size ", shell_quote(cache->file), NULL);
    f = popen(tmp->ptr, "r");
    if (!f)
      return FALSE;
    while (fscanf(f, "%d %d", &w, &h) < 0) {
      if (feof(f))
          break;
    }
    pclose(f);

    if (!(w > 0 && h > 0))
      return FALSE;
    w = (int)(w * image_scale / 100 + 0.5);
    if (w == 0)
      w = 1;
    h = (int)(h * image_scale / 100 + 0.5);
    if (h == 0)
      h = 1;
    if (cache->width < 0 && cache->height < 0) {
      cache->width = (w > MAX_IMAGE_SIZE) ? MAX_IMAGE_SIZE : w;
      cache->height = (h > MAX_IMAGE_SIZE) ? MAX_IMAGE_SIZE : h;
    }
    else if (cache->width < 0) {
      int tmp = (int)((double)cache->height * w / h + 0.5);
      cache->width = (tmp > MAX_IMAGE_SIZE) ? MAX_IMAGE_SIZE : tmp;
    }
    else if (cache->height < 0) {
      int tmp = (int)((double)cache->width * h / w + 0.5);
      cache->height = (tmp > MAX_IMAGE_SIZE) ? MAX_IMAGE_SIZE : tmp;
    }
    if (cache->width == 0)
      cache->width = 1;
    if (cache->height == 0)
      cache->height = 1;
    tmp = Sprintf("%d;%d;%s", cache->width, cache->height, cache->url);
    putHash_sv(image_hash, tmp->ptr, (void *)cache);
    return TRUE;
}
#endif

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