8 files changed, 185 insertions, 149 deletions

diff --git a/src/ChangeLog b/src/ChangeLog
index 4b4f82aa4c8..87b54529f2e 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,3 +1,24 @@
+2010-09-12  Lars Magne Ingebrigtsen  <larsi@gnus.org>
+
+        * xml.c (Fhtml_parse_string, Fxml_parse_string): Mention BASE-URL.
+
+2010-09-12  Stefan Monnier  <monnier@iro.umontreal.ca>
+
+        * fns.c (Fy_or_n_p): Move to lisp/subr.el.
+        (syms_of_fns): Don't defsubr Sy_or_n_p.
+        * lisp.h: Don't declare Fy_or_n_p.
+        * fileio.c (barf_or_query_if_file_exists): Fy_or_n_p -> y-or-n-p.
+
+2010-09-09  Lars Magne Ingebrigtsen  <larsi@gnus.org>
+
+        * xml.c (Fxml_parse_buffer): New function to parse XML files.
+
+2010-09-08  Lars Magne Ingebrigtsen  <larsi@gnus.org>
+
+        * xml.c: New file.
+        (Fhtml_parse_buffer): New function to interface to the libxml2
+        html parsing function.
+
 2010-09-05  Juanma Barranquero  <lekktu@gmail.com>
 
         * biditype.h: Regenerate.
@@ -60,8 +81,8 @@
         characters.
 
         * term.c (encode_terminal_code): Fix the previous change.
-        (produce_glyphs): Don't set it->char_to_display here.  Don't
-        handle unibyte-display-via-language-environment here.
+        (produce_glyphs): Don't set it->char_to_display here.
+        Don't handle unibyte-display-via-language-environment here.
         (produce_special_glyphs): Set temp_it.char_to_display before
         calling produce_glyphs.
 
@@ -104,7 +125,7 @@
 2010-08-29  Kenichi Handa  <handa@m17n.org>
 
         * term.c (encode_terminal_code): Encode byte chars to the
-        correspnding bytes.
+        corresponding bytes.
 
 2010-08-29  Jan Djärv  <jan.h.d@swipnet.se>
 
diff --git a/src/Makefile.in b/src/Makefile.in
index b086e18ae13..278ae5972ad 100644
--- a/src/Makefile.in
+++ b/src/Makefile.in
@@ -226,6 +226,8 @@ RSVG_CFLAGS= @RSVG_CFLAGS@
 IMAGEMAGICK_LIBS= @IMAGEMAGICK_LIBS@
 IMAGEMAGICK_CFLAGS= @IMAGEMAGICK_CFLAGS@
 
+LIBXML2_LIBS = @LIBXML2_LIBS@
+LIBXML2_CFLAGS = @LIBXML2_CFLAGS@
 
 ## widget.o if USE_X_TOOLKIT, otherwise empty.
 WIDGET_OBJ=@WIDGET_OBJ@
@@ -320,7 +322,8 @@ MKDEPDIR=@MKDEPDIR@
 ## FIXME? MYCPPFLAGS only referenced in etc/DEBUG.
 ALL_CFLAGS=-Demacs -DHAVE_CONFIG_H $(MYCPPFLAGS) -I. -I${srcdir} \
   ${C_SWITCH_MACHINE} ${C_SWITCH_SYSTEM} ${C_SWITCH_X_SITE} \
-  ${C_SWITCH_X_SYSTEM} ${CFLAGS_SOUND} ${RSVG_CFLAGS} ${IMAGEMAGICK_CFLAGS} ${DBUS_CFLAGS} \
+  ${C_SWITCH_X_SYSTEM} ${CFLAGS_SOUND} ${RSVG_CFLAGS} ${IMAGEMAGICK_CFLAGS} \
+  ${LIBXML2_CFLAGS} ${DBUS_CFLAGS} \
   ${GCONF_CFLAGS} ${FREETYPE_CFLAGS} ${FONTCONFIG_CFLAGS} \
   ${LIBOTF_CFLAGS} ${M17N_FLT_CFLAGS} ${DEPFLAGS} ${PROFILING_CFLAGS} \
   ${C_WARNINGS_SWITCH} ${CFLAGS}
@@ -349,7 +352,7 @@ obj=    dispnew.o frame.o scroll.o xdisp.o menu.o $(XMENU_OBJ) window.o \
         syntax.o $(UNEXEC_OBJ) bytecode.o \
         process.o callproc.o \
         region-cache.o sound.o atimer.o \
-        doprnt.o strftime.o intervals.o textprop.o composite.o md5.o \
+        doprnt.o strftime.o intervals.o textprop.o composite.o md5.o xml.o \
         xwidget.o \
         $(MSDOS_OBJ) $(MSDOS_X_OBJ) $(NS_OBJ) $(CYGWIN_OBJ) $(FONT_OBJ)
 
@@ -597,7 +600,8 @@ SOME_MACHINE_LISP = ../lisp/mouse.elc \
 ## duplicated symbols.  If the standard libraries were compiled
 ## with GCC, we might need LIB_GCC again after them.
 LIBES = $(LIBS) $(LIBX_BASE) $(LIBX_OTHER) $(LIBSOUND) \
-   $(RSVG_LIBS) ${IMAGEMAGICK_LIBS}  $(DBUS_LIBS) $(LIBGPM) $(LIBRESOLV) $(LIBS_SYSTEM) \
+   $(RSVG_LIBS) ${IMAGEMAGICK_LIBS} $(DBUS_LIBS) \
+   ${LIBXML2_LIBS} $(LIBGPM) $(LIBRESOLV) $(LIBS_SYSTEM) \
    $(LIBS_TERMCAP) $(GETLOADAVG_LIBS) ${GCONF_LIBS} ${LIBSELINUX_LIBS} \
    $(FREETYPE_LIBS) $(FONTCONFIG_LIBS) $(LIBOTF_LIBS) $(M17N_FLT_LIBS) \
    $(LIB_GCC) $(LIB_MATH) $(LIB_STANDARD) $(LIB_GCC)
diff --git a/src/config.in b/src/config.in
index 604a737a8b0..199afbd78ba 100644
--- a/src/config.in
+++ b/src/config.in
@@ -813,6 +813,9 @@ along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
 /* Define to 1 if you have the SM library (-lSM). */
 #undef HAVE_X_SM
 
+/* Define to 1 if you have the libxml2 library (-lxml2). */
+#undef HAVE_LIBXML2
+
 /* Define to 1 if you want to use the X window system. */
 #undef HAVE_X_WINDOWS
 
diff --git a/src/emacs.c b/src/emacs.c
index debf9f2305f..297b2bc20af 100644
--- a/src/emacs.c
+++ b/src/emacs.c
@@ -1547,6 +1547,10 @@ main (int argc, char **argv)
 #endif
 #endif /* HAVE_X_WINDOWS */
 
+#ifdef HAVE_LIBXML2
+      syms_of_xml ();
+#endif
+
       syms_of_menu ();
 
 #ifdef HAVE_NTGUI
diff --git a/src/fileio.c b/src/fileio.c
index a04cd4e76f5..3d08e881e8f 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -1842,7 +1842,7 @@ barf_or_query_if_file_exists (Lisp_Object absname, const unsigned char *querystr
       tem = format2 ("File %s already exists; %s anyway? ",
                      absname, build_string (querystring));
       if (quick)
-        tem = Fy_or_n_p (tem);
+        tem = call1 (intern ("y-or-n-p"), tem);
       else
         tem = do_yes_or_no_p (tem);
       UNGCPRO;
diff --git a/src/fns.c b/src/fns.c
index 12d13186ce7..19590a2140d 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -2444,146 +2444,6 @@ SEQUENCE may be a list, a vector, a bool-vector, or a string.  */)
   return sequence;
 }
 
-/* Anything that calls this function must protect from GC!  */
-
-DEFUN ("y-or-n-p", Fy_or_n_p, Sy_or_n_p, 1, 1, 0,
-       doc: /* Ask user a "y or n" question.  Return t if answer is "y".
-Takes one argument, which is the string to display to ask the question.
-It should end in a space; `y-or-n-p' adds `(y or n) ' to it.
-No confirmation of the answer is requested; a single character is enough.
-Also accepts Space to mean yes, or Delete to mean no.  \(Actually, it uses
-the bindings in `query-replace-map'; see the documentation of that variable
-for more information.  In this case, the useful bindings are `act', `skip',
-`recenter', and `quit'.\)
-
-Under a windowing system a dialog box will be used if `last-nonmenu-event'
-is nil and `use-dialog-box' is non-nil.  */)
-  (Lisp_Object prompt)
-{
-  register Lisp_Object obj, key, def, map;
-  register int answer;
-  Lisp_Object xprompt;
-  Lisp_Object args[2];
-  struct gcpro gcpro1, gcpro2;
-  int count = SPECPDL_INDEX ();
-
-  specbind (Qcursor_in_echo_area, Qt);
-
-  map = Fsymbol_value (intern ("query-replace-map"));
-
-  CHECK_STRING (prompt);
-  xprompt = prompt;
-  GCPRO2 (prompt, xprompt);
-
-#ifdef HAVE_WINDOW_SYSTEM
-  if (display_hourglass_p)
-    cancel_hourglass ();
-#endif
-
-  while (1)
-    {
-
-#ifdef HAVE_MENUS
-      if (FRAME_WINDOW_P (SELECTED_FRAME ())
-          && (NILP (last_nonmenu_event) || CONSP (last_nonmenu_event))
-          && use_dialog_box
-          && have_menus_p ())
-        {
-          Lisp_Object pane, menu;
-          redisplay_preserve_echo_area (3);
-          pane = Fcons (Fcons (build_string ("Yes"), Qt),
-                        Fcons (Fcons (build_string ("No"), Qnil),
-                               Qnil));
-          menu = Fcons (prompt, pane);
-          obj = Fx_popup_dialog (Qt, menu, Qnil);
-          answer = !NILP (obj);
-          break;
-        }
-#endif /* HAVE_MENUS */
-      cursor_in_echo_area = 1;
-      choose_minibuf_frame ();
-
-      {
-        Lisp_Object pargs[3];
-
-        /* Colorize prompt according to `minibuffer-prompt' face.  */
-        pargs[0] = build_string ("%s(y or n) ");
-        pargs[1] = intern ("face");
-        pargs[2] = intern ("minibuffer-prompt");
-        args[0] = Fpropertize (3, pargs);
-        args[1] = xprompt;
-        Fmessage (2, args);
-      }
-
-      if (minibuffer_auto_raise)
-        {
-          Lisp_Object mini_frame;
-
-          mini_frame = WINDOW_FRAME (XWINDOW (minibuf_window));
-
-          Fraise_frame (mini_frame);
-        }
-
-      temporarily_switch_to_single_kboard (SELECTED_FRAME ());
-      obj = read_filtered_event (1, 0, 0, 0, Qnil);
-      cursor_in_echo_area = 0;
-      /* If we need to quit, quit with cursor_in_echo_area = 0.  */
-      QUIT;
-
-      key = Fmake_vector (make_number (1), obj);
-      def = Flookup_key (map, key, Qt);
-
-      if (EQ (def, intern ("skip")))
-        {
-          answer = 0;
-          break;
-        }
-      else if (EQ (def, intern ("act")))
-        {
-          answer = 1;
-          break;
-        }
-      else if (EQ (def, intern ("recenter")))
-        {
-          Frecenter (Qnil);
-          xprompt = prompt;
-          continue;
-        }
-      else if (EQ (def, intern ("quit")))
-        Vquit_flag = Qt;
-      /* We want to exit this command for exit-prefix,
-         and this is the only way to do it.  */
-      else if (EQ (def, intern ("exit-prefix")))
-        Vquit_flag = Qt;
-
-      QUIT;
-
-      /* If we don't clear this, then the next call to read_char will
-         return quit_char again, and we'll enter an infinite loop.  */
-      Vquit_flag = Qnil;
-
-      Fding (Qnil);
-      Fdiscard_input ();
-      if (EQ (xprompt, prompt))
-        {
-          args[0] = build_string ("Please answer y or n.  ");
-          args[1] = prompt;
-          xprompt = Fconcat (2, args);
-        }
-    }
-  UNGCPRO;
-
-  if (! noninteractive)
-    {
-      cursor_in_echo_area = -1;
-      message_with_string (answer ? "%s(y or n) y" : "%s(y or n) n",
-                           xprompt, 0);
-    }
-
-  unbind_to (count, Qnil);
-  return answer ? Qt : Qnil;
-}
-
 /* This is how C code calls `yes-or-no-p' and allows the user
    to redefined it.
 
@@ -5058,7 +4918,6 @@ this variable.  */);
   defsubr (&Smapcar);
   defsubr (&Smapc);
   defsubr (&Smapconcat);
-  defsubr (&Sy_or_n_p);
   defsubr (&Syes_or_no_p);
   defsubr (&Sload_average);
   defsubr (&Sfeaturep);
diff --git a/src/lisp.h b/src/lisp.h
index 89514bf9ecb..781261d9779 100644
--- a/src/lisp.h
+++ b/src/lisp.h
@@ -2516,7 +2516,6 @@ EXFUN (Ffillarray, 2);
 EXFUN (Fnconc, MANY);
 EXFUN (Fmapcar, 2);
 EXFUN (Fmapconcat, 3);
-EXFUN (Fy_or_n_p, 1);
 extern Lisp_Object do_yes_or_no_p (Lisp_Object);
 EXFUN (Frequire, 3);
 EXFUN (Fprovide, 2);
@@ -3577,6 +3576,11 @@ extern char *x_get_keysym_name (int);
 EXFUN (Fmsdos_downcase_filename, 1);
 #endif
 
+#ifdef HAVE_LIBXML2
+/* Defined in xml.c */
+extern void syms_of_xml (void);
+#endif
+
 #ifdef HAVE_MENUS
 /* Defined in (x|w32)fns.c, nsfns.m...  */
 extern int have_menus_p (void);
diff --git a/src/xml.c b/src/xml.c
new file mode 100644
index 00000000000..c1098b15a20
--- /dev/null
+++ b/src/xml.c
@@ -0,0 +1,141 @@
+/* Interface to libxml2.
+   Copyright (C) 2010 Free Software Foundation, Inc.
+
+This file is part of GNU Emacs.
+
+GNU Emacs is free software: you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation, either version 3 of the License, or
+(at your option) any later version.
+
+GNU Emacs is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Emacs.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+#ifdef HAVE_LIBXML2
+
+#include <setjmp.h>
+#include <libxml/tree.h>
+#include <libxml/parser.h>
+#include <libxml/HTMLparser.h>
+
+#include "lisp.h"
+#include "buffer.h"
+
+Lisp_Object make_dom (xmlNode *node)
+{
+  if (node->type == XML_ELEMENT_NODE) {
+    Lisp_Object result = Fcons (intern (node->name), Qnil);
+    xmlNode *child;
+    xmlAttr *property;
+
+    /* First add the attributes. */
+    property = node->properties;
+    while (property != NULL) {
+      if (property->children &&
+          property->children->content) {
+        char *pname = xmalloc (strlen (property->name) + 2);
+        *pname = ':';
+        strcpy(pname + 1, property->name);
+        result = Fcons (Fcons (intern (pname),
+                               build_string(property->children->content)),
+                        result);
+        xfree (pname);
+      }
+      property = property->next;
+    }
+    /* Then add the children of the node. */
+    child = node->children;
+    while (child != NULL) {
+      result = Fcons (make_dom (child), result);
+      child = child->next;
+    }
+    return Fnreverse (result);
+  } else if (node->type == XML_TEXT_NODE) {
+    Lisp_Object content = Qnil;
+
+    if (node->content)
+      content = build_string (node->content);
+
+    return Fcons (intern (node->name), content);
+  } else
+    return Qnil;
+}
+
+static Lisp_Object
+parse_buffer (Lisp_Object string, Lisp_Object base_url, int htmlp)
+{
+  xmlDoc *doc;
+  xmlNode *node;
+  Lisp_Object result;
+  int ibeg, iend;
+  char *burl = "";
+
+  LIBXML_TEST_VERSION;
+
+  CHECK_STRING (string);
+
+  if (! NILP (base_url)) {
+    CHECK_STRING (base_url);
+    burl = SDATA (base_url);
+  }
+
+  if (htmlp)
+    doc = htmlReadMemory (SDATA (string), SBYTES (string), burl, "utf-8",
+                          HTML_PARSE_RECOVER|HTML_PARSE_NONET|
+                          HTML_PARSE_NOWARNING|HTML_PARSE_NOERROR);
+  else
+    doc = xmlReadMemory (SDATA (string), SBYTES (string), burl, "utf-8",
+                         XML_PARSE_NONET|XML_PARSE_NOWARNING|
+                         XML_PARSE_NOERROR);
+
+  if (doc != NULL) {
+    node = xmlDocGetRootElement (doc);
+    if (node != NULL)
+      result = make_dom (node);
+
+    xmlFreeDoc (doc);
+    xmlCleanupParser ();
+  }
+
+  return result;
+}
+
+DEFUN ("html-parse-string", Fhtml_parse_string, Shtml_parse_string,
+       0, 2, 0,
+       doc: /* Parse the string as an HTML document and return the parse tree.
+If BASE-URL is non-nil, it will be used to expand relative URLs in
+the HTML document.*/)
+  (Lisp_Object string, Lisp_Object base_url)
+{
+  return parse_buffer (string, base_url, 1);
+}
+
+DEFUN ("xml-parse-string", Fxml_parse_string, Sxml_parse_string,
+       0, 2, 0,
+       doc: /* Parse the string as an XML document and return the parse tree.
+If BASE-URL is non-nil, it will be used to expand relative URLs in
+the XML document.*/)
+  (Lisp_Object string, Lisp_Object base_url)
+{
+  return parse_buffer (string, base_url, 0);
+}
+
+
+/***********************************************************************
+                            Initialization
+ ***********************************************************************/
+void
+syms_of_xml (void)
+{
+  defsubr (&Shtml_parse_string);
+  defsubr (&Sxml_parse_string);
+}
+
+#endif /* HAVE_LIBXML2 */