moving trunk for module inkscape

(bzr r1)

1 files changed, 775 insertions, 0 deletions

diff --git a/src/libcroco/cr-declaration.c b/src/libcroco/cr-declaration.c
new file mode 100644
index 000000000..a1ff0d292
--- /dev/null
+++ b/src/libcroco/cr-declaration.c
@@ -0,0 +1,775 @@
+/* -*- Mode: C; indent-tabs-mode: ni; c-basic-offset: 8 -*- */
+
+/*
+ * This file is part of The Croco Library
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of version 2.1 of the GNU Lesser General Public
+ * License as published by the Free Software Foundation.
+ *
+ * This program 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 Lesser General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ *
+ * Author: Dodji Seketeli.
+ * See COPYRIGHTS file for copyright information.
+ */
+
+
+#include <string.h>
+#include "cr-declaration.h"
+#include "cr-statement.h"
+#include "cr-parser.h"
+
+/**
+ *@file
+ *The definition of the #CRDeclaration class.
+ */
+
+/**
+ *Dumps (serializes) one css declaration to a file.
+ *@param a_this the current instance of #CRDeclaration.
+ *@param a_fp the destination file pointer.
+ *@param a_indent the number of indentation white char. 
+ */
+static void
+dump (CRDeclaration * a_this, FILE * a_fp, glong a_indent)
+{
+        guchar *str = NULL;
+
+        g_return_if_fail (a_this);
+
+        str = cr_declaration_to_string (a_this, a_indent);
+        if (str) {
+                fprintf (a_fp, "%s", str);
+                g_free (str);
+                str = NULL;
+        }
+}
+
+/**
+ *Constructor of #CRDeclaration.
+ *@param a_property the property string of the declaration
+ *@param a_value the value expression of the declaration.
+ *@return the newly built instance of #CRDeclaration, or NULL in
+ *case of error.
+ */
+CRDeclaration *
+cr_declaration_new (CRStatement * a_statement,
+                    CRString * a_property, CRTerm * a_value)
+{
+        CRDeclaration *result = NULL;
+
+        g_return_val_if_fail (a_property, NULL);
+
+        if (a_statement)
+                g_return_val_if_fail (a_statement
+                                      && ((a_statement->type == RULESET_STMT)
+                                          || (a_statement->type
+                                              == AT_FONT_FACE_RULE_STMT)
+                                          || (a_statement->type
+                                              == AT_PAGE_RULE_STMT)), NULL);
+
+        result = g_try_malloc (sizeof (CRDeclaration));
+        if (!result) {
+                cr_utils_trace_info ("Out of memory");
+                return NULL;
+        }
+        memset (result, 0, sizeof (CRDeclaration));
+        result->property = a_property;
+        result->value = a_value;
+
+        if (a_value) {
+                cr_term_ref (a_value);
+        }
+        result->parent_statement = a_statement;
+        return result;
+}
+
+/**
+ *Parses a text buffer that contains
+ *a css declaration.
+ *
+ *@param a_statement the parent css2 statement of this
+ *this declaration. Must be non NULL and of type
+ *RULESET_STMT (must be a ruleset).
+ *@param a_str the string that contains the statement.
+ *@param a_enc the encoding of a_str.
+ *@return the parsed declaration, or NULL in case of error.
+ */
+CRDeclaration *
+cr_declaration_parse_from_buf (CRStatement * a_statement,
+                               const guchar * a_str, enum CREncoding a_enc)
+{
+        enum CRStatus status = CR_OK;
+        CRTerm *value = NULL;
+        CRString *property = NULL;
+        CRDeclaration *result = NULL;
+        CRParser *parser = NULL;
+        gboolean important = FALSE;
+
+        g_return_val_if_fail (a_str, NULL);
+        if (a_statement)
+                g_return_val_if_fail (a_statement->type == RULESET_STMT,
+                                      NULL);
+
+        parser = cr_parser_new_from_buf ((guchar*)a_str, strlen (a_str), a_enc, FALSE);
+        g_return_val_if_fail (parser, NULL);
+
+        status = cr_parser_try_to_skip_spaces_and_comments (parser);
+        if (status != CR_OK)
+                goto cleanup;
+
+        status = cr_parser_parse_declaration (parser, &property,
+                                              &value, &important);
+        if (status != CR_OK || !property)
+                goto cleanup;
+
+        result = cr_declaration_new (a_statement, property, value);
+        if (result) {
+                property = NULL;
+                value = NULL;
+                result->important = important;
+        }
+
+      cleanup:
+
+        if (parser) {
+                cr_parser_destroy (parser);
+                parser = NULL;
+        }
+
+        if (property) {
+                cr_string_destroy (property);
+                property = NULL;
+        }
+
+        if (value) {
+                cr_term_destroy (value);
+                value = NULL;
+        }
+
+        return result;
+}
+
+/**
+ *Parses a ';' separated list of properties declaration.
+ *@param a_str the input buffer that contains the list of declaration to
+ *parse.
+ *@param a_enc the encoding of a_str
+ *@return the parsed list of declaration, NULL if parsing failed.
+ */
+CRDeclaration *
+cr_declaration_parse_list_from_buf (const guchar * a_str,
+                                    enum CREncoding a_enc)
+{
+
+        enum CRStatus status = CR_OK;
+        CRTerm *value = NULL;
+        CRString *property = NULL;
+        CRDeclaration *result = NULL,
+                *cur_decl = NULL;
+        CRParser *parser = NULL;
+        CRTknzr *tokenizer = NULL;
+        gboolean important = FALSE;
+
+        g_return_val_if_fail (a_str, NULL);
+
+        parser = cr_parser_new_from_buf ((guchar*)a_str, strlen (a_str), a_enc, FALSE);
+        g_return_val_if_fail (parser, NULL);
+        status = cr_parser_get_tknzr (parser, &tokenizer);
+        if (status != CR_OK || !tokenizer) {
+                if (status == CR_OK)
+                        status = CR_ERROR;
+                goto cleanup;
+        }
+        status = cr_parser_try_to_skip_spaces_and_comments (parser);
+        if (status != CR_OK)
+                goto cleanup;
+
+        status = cr_parser_parse_declaration (parser, &property,
+                                              &value, &important);
+        if (status != CR_OK || !property) {
+                if (status != CR_OK)
+                        status = CR_ERROR;
+                goto cleanup;
+        }
+        result = cr_declaration_new (NULL, property, value);
+        if (result) {
+                property = NULL;
+                value = NULL;
+                result->important = important;
+        }
+        /*now, go parse the other declarations */
+        for (;;) {
+                guint32 c = 0;
+
+                cr_parser_try_to_skip_spaces_and_comments (parser);
+                status = cr_tknzr_peek_char (tokenizer, &c);
+                if (status != CR_OK) {
+                        if (status == CR_END_OF_INPUT_ERROR)
+                                status = CR_OK;
+                        goto cleanup;
+                }
+                if (c == ';') {
+                        status = cr_tknzr_read_char (tokenizer, &c);
+                } else {
+                        break;
+                }
+                important = FALSE;
+                cr_parser_try_to_skip_spaces_and_comments (parser);
+                status = cr_parser_parse_declaration (parser, &property,
+                                                      &value, &important);
+                if (status != CR_OK || !property) {
+                        if (status == CR_END_OF_INPUT_ERROR) {
+                                status = CR_OK;
+                        }
+                        break;
+                }
+                cur_decl = cr_declaration_new (NULL, property, value);
+                if (cur_decl) {
+                        cur_decl->important = important;
+                        result = cr_declaration_append (result, cur_decl);
+                        property = NULL;
+                        value = NULL;
+                        cur_decl = NULL;
+                } else {
+                        break;
+                }
+        }
+
+      cleanup:
+
+        if (parser) {
+                cr_parser_destroy (parser);
+                parser = NULL;
+        }
+
+        if (property) {
+                cr_string_destroy (property);
+                property = NULL;
+        }
+
+        if (value) {
+                cr_term_destroy (value);
+                value = NULL;
+        }
+
+        if (status != CR_OK && result) {
+                cr_declaration_destroy (result);
+                result = NULL;
+        }
+        return result;
+}
+
+/**
+ *Appends a new declaration to the current declarations list.
+ *@param a_this the current declaration list.
+ *@param a_new the declaration to append.
+ *@return the declaration list with a_new appended to it, or NULL
+ *in case of error.
+ */
+CRDeclaration *
+cr_declaration_append (CRDeclaration * a_this, CRDeclaration * a_new)
+{
+        CRDeclaration *cur = NULL;
+
+        g_return_val_if_fail (a_new, NULL);
+
+        if (!a_this)
+                return a_new;
+
+        for (cur = a_this; cur && cur->next; cur = cur->next) ;
+
+        cur->next = a_new;
+        a_new->prev = cur;
+
+        return a_this;
+}
+
+/**
+ *Unlinks the declaration from the declaration list.
+ *@param a_decl the declaration to unlink.
+ *@return a pointer to the unlinked declaration in
+ *case of a successfull completion, NULL otherwise.
+ */
+CRDeclaration *
+cr_declaration_unlink (CRDeclaration * a_decl)
+{
+        CRDeclaration *result = a_decl;
+
+        g_return_val_if_fail (result, NULL);
+
+        /*
+         *some sanity checks first
+         */
+        if (a_decl->prev) {
+                g_return_val_if_fail (a_decl->prev->next == a_decl, NULL);
+
+        }
+        if (a_decl->next) {
+                g_return_val_if_fail (a_decl->next->prev == a_decl, NULL);
+        }
+
+        /*
+         *now, the real unlinking job.
+         */
+        if (a_decl->prev) {
+                a_decl->prev->next = a_decl->next;
+        }
+        if (a_decl->next) {
+                a_decl->next->prev = a_decl->prev;
+        }
+        if (a_decl->parent_statement) {
+                CRDeclaration **children_decl_ptr = NULL;
+
+                switch (a_decl->parent_statement->type) {
+                case RULESET_STMT:
+                        if (a_decl->parent_statement->kind.ruleset) {
+                                children_decl_ptr =
+                                        &a_decl->parent_statement->
+                                        kind.ruleset->decl_list;
+                        }
+
+                        break;
+
+                case AT_FONT_FACE_RULE_STMT:
+                        if (a_decl->parent_statement->kind.font_face_rule) {
+                                children_decl_ptr =
+                                        &a_decl->parent_statement->
+                                        kind.font_face_rule->decl_list;
+                        }
+                        break;
+                case AT_PAGE_RULE_STMT:
+                        if (a_decl->parent_statement->kind.page_rule) {
+                                children_decl_ptr =
+                                        &a_decl->parent_statement->
+                                        kind.page_rule->decl_list;
+                        }
+
+                default:
+                        break;
+                }
+                if (children_decl_ptr
+                    && *children_decl_ptr && *children_decl_ptr == a_decl)
+                        *children_decl_ptr = (*children_decl_ptr)->next;
+        }
+
+        a_decl->next = NULL;
+        a_decl->prev = NULL;
+        a_decl->parent_statement = NULL;
+
+        return result;
+}
+
+/**
+ *prepends a declaration to the current declaration list.
+ *@param a_this the current declaration list.
+ *@param a_new the declaration to prepend.
+ *@return the list with a_new prepended or NULL in case of error.
+ */
+CRDeclaration *
+cr_declaration_prepend (CRDeclaration * a_this, CRDeclaration * a_new)
+{
+        CRDeclaration *cur = NULL;
+
+        g_return_val_if_fail (a_new, NULL);
+
+        if (!a_this)
+                return a_new;
+
+        a_this->prev = a_new;
+        a_new->next = a_this;
+
+        for (cur = a_new; cur && cur->prev; cur = cur->prev) ;
+
+        return cur;
+}
+
+/**
+ *Appends a declaration to the current declaration list.
+ *@param a_this the current declaration list.
+ *@param a_prop the property string of the declaration to append.
+ *@param a_value the value of the declaration to append.
+ *@return the list with the new property appended to it, or NULL in
+ *case of an error.
+ */
+CRDeclaration *
+cr_declaration_append2 (CRDeclaration * a_this,
+                        CRString * a_prop, CRTerm * a_value)
+{
+        CRDeclaration *new_elem = NULL;
+
+        if (a_this) {
+                new_elem = cr_declaration_new (a_this->parent_statement,
+                                               a_prop, a_value);
+        } else {
+                new_elem = cr_declaration_new (NULL, a_prop, a_value);
+        }
+
+        g_return_val_if_fail (new_elem, NULL);
+
+        return cr_declaration_append (a_this, new_elem);
+}
+
+/**
+ *Dumps a declaration list to a file.
+ *@param a_this the current instance of #CRDeclaration.
+ *@param a_fp the destination file.
+ *@param a_indent the number of indentation white char.
+ */
+void
+cr_declaration_dump (CRDeclaration * a_this, FILE * a_fp, glong a_indent,
+                     gboolean a_one_per_line)
+{
+        CRDeclaration *cur = NULL;
+
+        g_return_if_fail (a_this);
+
+        for (cur = a_this; cur; cur = cur->next) {
+                if (cur->prev) {
+                        if (a_one_per_line == TRUE)
+                                fprintf (a_fp, ";\n");
+                        else
+                                fprintf (a_fp, "; ");
+                }
+                dump (cur, a_fp, a_indent);
+        }
+}
+
+/**
+ *Dumps the first declaration of the declaration list to a file.
+ *@param a_this the current instance of #CRDeclaration.
+ *@param a_fp the destination file.
+ *@param a_indent the number of indentation white char.
+ */
+void
+cr_declaration_dump_one (CRDeclaration * a_this, FILE * a_fp, glong a_indent)
+{
+        g_return_if_fail (a_this);
+
+        dump (a_this, a_fp, a_indent);
+}
+
+/**
+ *Serializes the declaration into a string
+ *@param a_this the current instance of #CRDeclaration.
+ *@param a_indent the number of indentation white char
+ *to put before the actual serialisation.
+ */
+gchar *
+cr_declaration_to_string (CRDeclaration * a_this, gulong a_indent)
+{
+        GString *stringue = NULL;
+
+        guchar *str = NULL,
+                *result = NULL;
+
+        g_return_val_if_fail (a_this, NULL);
+
+	stringue = g_string_new (NULL);
+
+	if (a_this->property 
+	    && a_this->property->stryng
+	    && a_this->property->stryng->str) {
+		str = g_strndup (a_this->property->stryng->str,
+				 a_this->property->stryng->len);
+		if (str) {
+			cr_utils_dump_n_chars2 (' ', stringue, 
+						a_indent);
+			g_string_append (stringue, str);
+			g_free (str);
+			str = NULL;
+		} else
+                        goto error;
+
+                if (a_this->value) {
+                        guchar *value_str = NULL;
+
+                        value_str = cr_term_to_string (a_this->value);
+                        if (value_str) {
+                                g_string_append_printf (stringue, " : %s",
+                                                        value_str);
+                                g_free (value_str);
+                        } else
+                                goto error;
+                }
+                if (a_this->important == TRUE) {
+                        g_string_append_printf (stringue, " %s",
+                                                "!important");
+                }
+        }
+        if (stringue && stringue->str) {
+                result = stringue->str;
+                g_string_free (stringue, FALSE);
+        }
+        return result;
+
+      error:
+        if (stringue) {
+                g_string_free (stringue, TRUE);
+                stringue = NULL;
+        }
+        if (str) {
+                g_free (str);
+                str = NULL;
+        }
+
+        return result;
+}
+
+/**
+ *Serializes the declaration list into a string
+ *@param a_this the current instance of #CRDeclaration.
+ *@param a_indent the number of indentation white char
+ *to put before the actual serialisation.
+ */
+guchar *
+cr_declaration_list_to_string (CRDeclaration * a_this, gulong a_indent)
+{
+        CRDeclaration *cur = NULL;
+        GString *stringue = NULL;
+        guchar *str = NULL,
+                *result = NULL;
+
+        g_return_val_if_fail (a_this, NULL);
+
+        stringue = g_string_new (NULL);
+
+        for (cur = a_this; cur; cur = cur->next) {
+                str = cr_declaration_to_string (cur, a_indent);
+                if (str) {
+                        g_string_append_printf (stringue, "%s;", str);
+                        g_free (str);
+                } else
+                        break;
+        }
+        if (stringue && stringue->str) {
+                result = stringue->str;
+                g_string_free (stringue, FALSE);
+        }
+
+        return result;
+}
+
+/**
+ *Serializes the declaration list into a string
+ *@param a_this the current instance of #CRDeclaration.
+ *@param a_indent the number of indentation white char
+ *to put before the actual serialisation.
+ */
+guchar *
+cr_declaration_list_to_string2 (CRDeclaration * a_this,
+                                gulong a_indent, gboolean a_one_decl_per_line)
+{
+        CRDeclaration *cur = NULL;
+        GString *stringue = NULL;
+        guchar *str = NULL,
+                *result = NULL;
+
+        g_return_val_if_fail (a_this, NULL);
+
+        stringue = g_string_new (NULL);
+
+        for (cur = a_this; cur; cur = cur->next) {
+                str = cr_declaration_to_string (cur, a_indent);
+                if (str) {
+                        if (a_one_decl_per_line == TRUE) {
+                                if (cur->next)
+                                        g_string_append_printf (stringue,
+                                                                "%s;\n", str);
+                                else
+                                        g_string_append (stringue,
+                                                         str);
+                        } else {
+                                if (cur->next)
+                                        g_string_append_printf (stringue,
+                                                                "%s;", str);
+                                else
+                                        g_string_append (stringue,
+                                                         str);
+                        }
+                        g_free (str);
+                } else
+                        break;
+        }
+        if (stringue && stringue->str) {
+                result = stringue->str;
+                g_string_free (stringue, FALSE);
+        }
+
+        return result;
+}
+
+/**
+ *Return the number of properties in the declaration;
+ *@param a_this the current instance of #CRDeclaration.
+ *@return number of properties in the declaration list.
+ */
+gint
+cr_declaration_nr_props (CRDeclaration * a_this)
+{
+        CRDeclaration *cur = NULL;
+        int nr = 0;
+
+        g_return_val_if_fail (a_this, -1);
+
+        for (cur = a_this; cur; cur = cur->next)
+                nr++;
+        return nr;
+}
+
+/**
+ *Use an index to get a CRDeclaration from the declaration list.
+ *@param a_this the current instance of #CRDeclaration.
+ *@param itemnr the index into the declaration list.
+ *@return CRDeclaration at position itemnr, if itemnr > number of declarations - 1,
+ *it will return NULL.
+ */
+CRDeclaration *
+cr_declaration_get_from_list (CRDeclaration * a_this, int itemnr)
+{
+        CRDeclaration *cur = NULL;
+        int nr = 0;
+
+        g_return_val_if_fail (a_this, NULL);
+
+        for (cur = a_this; cur; cur = cur->next)
+                if (nr++ == itemnr)
+                        return cur;
+        return NULL;
+}
+
+/**
+ *Use property name to get a CRDeclaration from the declaration list.
+ *@param a_this the current instance of #CRDeclaration.
+ *@param a_prop the property name to search for.
+ *@return CRDeclaration with property name a_prop, or NULL if not found.
+ */
+CRDeclaration *
+cr_declaration_get_by_prop_name (CRDeclaration * a_this,
+                                 const guchar * a_prop)
+{
+        CRDeclaration *cur = NULL;
+
+        g_return_val_if_fail (a_this, NULL);
+        g_return_val_if_fail (a_prop, NULL);
+
+        for (cur = a_this; cur; cur = cur->next) {
+		if (cur->property 
+		    && cur->property->stryng
+		    && cur->property->stryng->str) {
+			if (!strcmp (cur->property->stryng->str, 
+				     a_prop)) {
+				return cur;
+			}
+		}
+	}
+        return NULL;
+}
+
+/**
+ *Increases the ref count of the current instance of #CRDeclaration.
+ *@param a_this the current instance of #CRDeclaration.
+ */
+void
+cr_declaration_ref (CRDeclaration * a_this)
+{
+        g_return_if_fail (a_this);
+
+        a_this->ref_count++;
+}
+
+/**
+ *Decrements the ref count of the current instance of #CRDeclaration.
+ *If the ref count reaches zero, the current instance of #CRDeclaration
+ *if destroyed.
+ *@param a_this the current instance of #CRDeclaration.
+ *@return TRUE if the current instance of #CRDeclaration has been destroyed
+ *(ref count reached zero), FALSE otherwise.
+ */
+gboolean
+cr_declaration_unref (CRDeclaration * a_this)
+{
+        g_return_val_if_fail (a_this, FALSE);
+
+        if (a_this->ref_count) {
+                a_this->ref_count--;
+        }
+
+        if (a_this->ref_count == 0) {
+                cr_declaration_destroy (a_this);
+                return TRUE;
+        }
+        return FALSE;
+}
+
+/**
+ *Destructor of the declaration list.
+ *@param a_this the current instance of #CRDeclaration.
+ */
+void
+cr_declaration_destroy (CRDeclaration * a_this)
+{
+        CRDeclaration *cur = NULL;
+
+        g_return_if_fail (a_this);
+
+        /*
+         *Go get the tail of the list.
+         *Meanwhile, free each property/value pair contained in the list.
+         */
+        for (cur = a_this; cur && cur->next; cur = cur->next) {
+                if (cur->property) {
+                        cr_string_destroy (cur->property);
+                        cur->property = NULL;
+                }
+
+                if (cur->value) {
+                        cr_term_destroy (cur->value);
+                        cur->value = NULL;
+                }
+        }
+
+        if (cur) {
+                if (cur->property) {
+                        cr_string_destroy (cur->property);
+                        cur->property = NULL;
+                }
+
+                if (cur->value) {
+                        cr_term_destroy (cur->value);
+                        cur->value = NULL;
+                }
+        }
+
+        /*in case the list contains only one element */
+        if (cur && !cur->prev) {
+                g_free (cur);
+                return;
+        }
+
+        /*walk backward the list and free each "next" element */
+        for (cur = cur->prev; cur && cur->prev; cur = cur->prev) {
+                if (cur->next) {
+                        g_free (cur->next);
+                        cur->next = NULL;
+                }
+        }
+
+        if (!cur)
+                return;
+
+        if (cur->next) {
+                g_free (cur->next);
+                cur->next = NULL;
+        }
+
+        g_free (cur);
+}