534 lines
15 KiB
Vala
534 lines
15 KiB
Vala
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
||
*
|
||
* @software : pluie-yaml <https://git.pluie.org/pluie/lib-yaml>
|
||
* @version : 0.5
|
||
* @type : library
|
||
* @date : 2018
|
||
* @licence : GPLv3.0 <http://www.gnu.org/licenses/>
|
||
* @author : a-Sansara <[dev]at[pluie]dot[org]>
|
||
* @copyright : pluie.org <http://www.pluie.org/>
|
||
*
|
||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
||
*
|
||
* This file is part of pluie-yaml.
|
||
*
|
||
* pluie-yaml is free software (free as in speech) : 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.
|
||
*
|
||
* pluie-yaml 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 pluie-yaml. If not, see <http://www.gnu.org/licenses/>.
|
||
*
|
||
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
|
||
*/
|
||
|
||
using GLib;
|
||
using Gee;
|
||
using Pluie;
|
||
|
||
/**
|
||
* a class dealing with a sequence of yaml events and composing the Yaml Node Graph
|
||
*/
|
||
public class Pluie.Yaml.Processor
|
||
{
|
||
/**
|
||
* indicates if processing is sucess
|
||
*/
|
||
public bool done;
|
||
|
||
/**
|
||
* indicates if new node has been created
|
||
*/
|
||
bool change;
|
||
|
||
/**
|
||
* indicates if begon a flow sequence
|
||
*/
|
||
bool beginFlowSeq;
|
||
|
||
/**
|
||
*
|
||
*/
|
||
int indexEvt;
|
||
|
||
/**
|
||
* current anchor id
|
||
*/
|
||
string? idAnchor;
|
||
|
||
/**
|
||
* current key
|
||
*/
|
||
string? ckey;
|
||
|
||
/**
|
||
* current key tag
|
||
*/
|
||
Yaml.Tag? keyTag;
|
||
|
||
/**
|
||
* current key tag
|
||
*/
|
||
Yaml.Tag? valueTag;
|
||
|
||
/**
|
||
* current tag handle
|
||
*/
|
||
string? tagHandle;
|
||
|
||
/**
|
||
* current tag handle
|
||
*/
|
||
Yaml.Event? nextValueEvt;
|
||
|
||
/**
|
||
* Events list
|
||
*/
|
||
public Gee.ArrayList<Yaml.Event> events { get; internal set; }
|
||
|
||
/**
|
||
* Anchor map
|
||
*/
|
||
Gee.HashMap<string, Yaml.Node> anchors { get; internal set; }
|
||
|
||
/**
|
||
* Error event
|
||
*/
|
||
Yaml.Event? event { get; internal set; }
|
||
|
||
/**
|
||
* Error event
|
||
*/
|
||
public Yaml.Event? error_event { get; internal set; }
|
||
|
||
/**
|
||
* the root Yaml.Node
|
||
*/
|
||
public Yaml.Root root;
|
||
|
||
/**
|
||
* current previous Yaml.Node
|
||
*/
|
||
Yaml.Node? prev_node;
|
||
|
||
/**
|
||
* current parent Yaml.Node
|
||
*/
|
||
Yaml.Node? parent_node;
|
||
|
||
/**
|
||
* current Yaml.Node
|
||
*/
|
||
Yaml.Node node;
|
||
|
||
/**
|
||
* Yaml.Event Iterator
|
||
*/
|
||
Gee.Iterator<Yaml.Event> iterator;
|
||
|
||
/**
|
||
*
|
||
*/
|
||
public Processor ()
|
||
{
|
||
this.events = new Gee.ArrayList<Yaml.Event>();
|
||
this.anchors = new Gee.HashMap<string, Yaml.Node>();
|
||
}
|
||
|
||
/**
|
||
* display the list of events generated via yaml.c
|
||
*/
|
||
public void read ()
|
||
{
|
||
of.action ("Reading events");
|
||
var i = 0;
|
||
foreach (Yaml.Event event in this.events) {
|
||
int len = 24 - event.evtype.infos ().length;
|
||
stdout.printf (" %03d [ %s"+@" %$(len)s "+", %d, %s", i++, event.evtype.infos (), " ", event.line, event.style != null ? event.style.to_string () : "0");
|
||
if (event.data != null && event.data.size > 0) {
|
||
stdout.printf (", {");
|
||
var it = event.data.map_iterator ();
|
||
string sep;
|
||
for (var has_next = it.next (); has_next; has_next = it.next ()) {
|
||
sep = it.has_next () ? ", " : "";
|
||
stdout.printf ("%s: %s%s", it.get_key (), it.get_value (), sep);
|
||
}
|
||
stdout.printf (" }");
|
||
}
|
||
of.echo ("]");
|
||
}
|
||
}
|
||
|
||
/**
|
||
* processing the events list and generate the corresponding Yaml Nodes
|
||
*/
|
||
public bool run ()
|
||
{
|
||
if (Yaml.DEBUG) this.read ();
|
||
Yaml.dbg_action ("Processing events");
|
||
this.reset ();
|
||
for (var has_next = this.iterator.next (); has_next; has_next = this.iterator.next ()) {
|
||
this.event = this.iterator.get ();
|
||
Yaml.dbg (" 0>>>>> [EVENT event [%d] %s <<<<< %s".printf (this.indexEvt++, this.event.evtype.infos (), Log.METHOD));
|
||
if (this.event.evtype.is_tag_directive ()) {
|
||
this.on_tag_directive ();
|
||
}
|
||
if (this.event.evtype.is_error ()) {
|
||
this.on_error ();
|
||
break;
|
||
}
|
||
if (this.event.evtype.is_mapping_end () || this.event.evtype.is_sequence_end ()) {
|
||
this.on_block_end ();
|
||
continue;
|
||
}
|
||
if (this.event.evtype.is_entry ()) {
|
||
this.on_entry ();
|
||
}
|
||
if (this.beginFlowSeq && this.event.evtype.is_scalar ()) {
|
||
if (!this.change) {
|
||
this.on_scalar (true);
|
||
}
|
||
this.beginFlowSeq = false;
|
||
}
|
||
if (this.event.evtype.is_key () && (this.event = this.get_value_key_event ()) != null) {
|
||
this.on_key ();
|
||
}
|
||
if (this.event.evtype.is_value () && (this.event = this.get_value_event ()) != null) {
|
||
this.on_value ();
|
||
if (this.event.evtype.is_mapping_start ()) {
|
||
this.on_mapping_start ();
|
||
}
|
||
else if (this.event.evtype.is_sequence_start ()) {
|
||
this.on_sequence_start ();
|
||
}
|
||
this.add_anchor_if_needed ();
|
||
this.ckey = null;
|
||
}
|
||
this.on_update ();
|
||
}
|
||
this.done = error_event == null && this.root != null;
|
||
return done;
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void reset ()
|
||
{
|
||
this.root = new Yaml.Root ();
|
||
this.prev_node = this.root;
|
||
this.parent_node = this.root;
|
||
this.iterator = this.events.iterator ();
|
||
this.change = false;
|
||
this.ckey = null;
|
||
this.idAnchor = null;
|
||
this.tagHandle = null;
|
||
this.keyTag = null;
|
||
this.valueTag = null;
|
||
this.beginFlowSeq = false;
|
||
this.nextValueEvt = null;
|
||
this.indexEvt = 0;
|
||
}
|
||
|
||
/**
|
||
* retriew the next Yaml Event
|
||
*/
|
||
private Yaml.Event? next_event ()
|
||
{
|
||
Yaml.Event? evt = null;
|
||
if (this.iterator.has_next () && this.iterator.next ()) {
|
||
evt = this.iterator.get ();
|
||
Yaml.dbg (" 1>>>>> [EVENT event [%d] %s <<<<< %s".printf (this.indexEvt++, evt.evtype.infos (), Log.METHOD));
|
||
}
|
||
return evt;
|
||
}
|
||
|
||
/**
|
||
* retriew the next Yaml Value Event closest to Key Event
|
||
*/
|
||
private Yaml.Event? get_value_key_event ()
|
||
{
|
||
Yaml.Event? evt = null;
|
||
var e = this.iterator.get ();
|
||
if (e != null && e.evtype.is_key ()) {
|
||
evt = this.next_event ();
|
||
}
|
||
return evt;
|
||
}
|
||
|
||
/**
|
||
* retriew the next Yaml Value Event
|
||
*/
|
||
private Yaml.Event? get_value_event ()
|
||
{
|
||
Yaml.Event? evt = null;
|
||
var e = this.iterator.get ();
|
||
if (e != null && e.evtype.is_value ()) {
|
||
evt = this.next_event ();
|
||
this.nextValueEvt = evt;
|
||
}
|
||
return evt;
|
||
}
|
||
|
||
/**
|
||
* retriew the next Yaml Value Event
|
||
*/
|
||
private Yaml.Event? get_next_value_event ()
|
||
{
|
||
Yaml.Event? evt = null;
|
||
var i = this.indexEvt+1;
|
||
var search = true;
|
||
while (search) {
|
||
if (i < this.events.size) {
|
||
var e = this.events.get (i++);
|
||
if (e != null && e.evtype.is_value ()) {
|
||
evt = this.events.get (i);
|
||
break;
|
||
}
|
||
}
|
||
else search = false;
|
||
}
|
||
|
||
return evt;
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_tag_directive ()
|
||
{
|
||
Yaml.dbg_action ("on_tag_directive %s".printf (this.event.data["handle"]), this.event.data["prefix"]);
|
||
this.root.tag_directives[this.event.data["handle"]] = this.event.data["prefix"];
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_error ()
|
||
{
|
||
this.error_event = this.event;
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_block_end ()
|
||
{
|
||
if (!this.prev_node.ntype.is_collection ()) {
|
||
this.prev_node = this.prev_node.parent;
|
||
}
|
||
bool isSequenceWithBlock = this.prev_node.ntype.is_sequence () && !this.prev_node.empty() && this.prev_node.first ().ntype.is_collection ();
|
||
if (!isSequenceWithBlock || (isSequenceWithBlock && (this.prev_node as Yaml.Sequence).close_block)) {
|
||
this.parent_node = this.prev_node.parent != null && this.prev_node.parent != this.root
|
||
? this.prev_node.parent
|
||
: this.root;
|
||
this.prev_node = this.parent_node;
|
||
}
|
||
if (isSequenceWithBlock) {
|
||
var seq = this.prev_node as Yaml.Sequence;
|
||
if (seq != null) {
|
||
seq.close_block = true;
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_entry ()
|
||
{
|
||
this.event = this.next_event();
|
||
Yaml.Event? e = null;
|
||
e = get_next_value_event ();
|
||
if (this.event.evtype.is_mapping_start () && (e!= null && !e.evtype.is_mapping_start ())) {
|
||
this.on_mapping_start (true);
|
||
}
|
||
else if (this.event.evtype.is_scalar ()) {
|
||
this.on_scalar (true);
|
||
}
|
||
}
|
||
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_tag (bool onKey = false)
|
||
{
|
||
if (this.event.evtype.is_tag ()) {
|
||
Yaml.dbg_keyval ("tag %s".printf (this.event.data["handle"]), this.event.data["suffix"]);
|
||
if (this.root.tag_directives.has_key (this.event.data["handle"])) {
|
||
var tag = new Yaml.Tag (this.event.data["suffix"], this.event.data["handle"].replace("!", ""));
|
||
if (onKey)
|
||
this.keyTag = tag;
|
||
else
|
||
this.valueTag = tag;
|
||
this.event = this.next_event ();
|
||
}
|
||
else {
|
||
of.warn ("tag handle %s not found in directive".printf (this.event.data["handle"]));
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_key ()
|
||
{
|
||
this.on_tag (true);
|
||
this.ckey = this.event.data["data"];
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_value ()
|
||
{
|
||
this.on_tag (false);
|
||
if (this.event.evtype.is_scalar ()) {
|
||
this.on_scalar ();
|
||
}
|
||
else if (this.event.evtype.is_anchor ()) {
|
||
this.on_anchor ();
|
||
}
|
||
else if (this.event.evtype.is_alias ()) {
|
||
this.on_alias ();
|
||
}
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_scalar (bool entry = false)
|
||
{
|
||
if (!entry) {
|
||
if (this.ckey != null) {
|
||
this.node = new Yaml.Mapping.with_scalar (this.parent_node, this.ckey, this.event.data["data"]);
|
||
this.change = true;
|
||
}
|
||
}
|
||
else {
|
||
this.node = new Yaml.Scalar (this.parent_node, this.event.data["data"]);
|
||
this.change = true;
|
||
}
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_anchor ()
|
||
{
|
||
this.idAnchor = this.event.data["id"];
|
||
this.event = this.next_event ();
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_alias ()
|
||
{
|
||
this.idAnchor = this.event.data["id"];
|
||
Yaml.Node? refnode = this.anchors.get(this.idAnchor);
|
||
if (refnode != null) {
|
||
this.node = refnode.clone_node (this.ckey);
|
||
this.parent_node.add (this.node);
|
||
this.prev_node = this.node;
|
||
}
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_sequence_start ()
|
||
{
|
||
this.node = new Yaml.Sequence (this.parent_node, this.ckey);
|
||
this.change = true;
|
||
this.beginFlowSeq = true;
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_mapping_start (bool entry = false)
|
||
{
|
||
if (entry) {
|
||
this.create_mapping (entry);
|
||
this.ckey = null;
|
||
}
|
||
else this.create_mapping ();
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void create_mapping (bool entry = false)
|
||
{
|
||
if (entry) {
|
||
this.ckey = "_%d".printf(this.parent_node.count());
|
||
}
|
||
this.node = new Yaml.Mapping (this.parent_node, this.ckey);
|
||
this.change = true;
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void add_anchor_if_needed ()
|
||
{
|
||
if (this.idAnchor != null) {
|
||
if (this.node != null) {
|
||
this.anchors.set(this.idAnchor, this.node);
|
||
}
|
||
this.idAnchor = null;
|
||
}
|
||
}
|
||
|
||
/**
|
||
*
|
||
*/
|
||
private void on_update ()
|
||
{
|
||
if (this.node != null) {
|
||
Yaml.dbg (this.node.name);
|
||
}
|
||
if (this.change) {
|
||
if (this.node.parent.ntype.is_sequence ()) {
|
||
var seq = this.node.parent as Yaml.Sequence;
|
||
if (seq != null) seq.close_block = false;
|
||
}
|
||
Yaml.dbg_action ("on change", this.node.name != null ? this.node.name : this.node.data);
|
||
if (this.keyTag != null) {
|
||
Yaml.dbg_action ("setting tag", this.keyTag.@value);
|
||
this.node.tag = this.keyTag;
|
||
}
|
||
else if (this.valueTag != null) {
|
||
if (this.node.ntype.is_scalar ()) {
|
||
this.node.tag = this.valueTag;
|
||
}
|
||
else if (!this.node.empty () && this.node.first().ntype.is_scalar ()) {
|
||
this.node.first ().tag = this.valueTag;
|
||
}
|
||
}
|
||
if (this.node.ntype.is_collection () && (this.node.empty() || (!this.node.first().ntype.is_scalar ()))) {
|
||
this.parent_node = this.node;
|
||
}
|
||
else {
|
||
this.parent_node = this.node.parent;
|
||
}
|
||
this.prev_node = this.node;
|
||
this.tagHandle = null;
|
||
this.keyTag = null;
|
||
this.valueTag = null;
|
||
this.node = null;
|
||
this.change = false;
|
||
}
|
||
}
|
||
|
||
}
|