[gxml] Added CssSelectorParser.match() method
- From: Daniel Espinosa Ortiz <despinosa src gnome org>
- To: commits-list gnome org
- Cc:
- Subject: [gxml] Added CssSelectorParser.match() method
- Date: Wed, 6 Sep 2017 16:17:00 +0000 (UTC)
commit 78d7dbe47e1a32bea1244194816f1aacc2c209dd
Author: Daniel Espinosa <esodan gmail com>
Date: Wed Sep 6 08:11:05 2017 -0700
Added CssSelectorParser.match() method
This match() method will be used for DOM
to create a list of elements matching selectors
gxml/css-selector-parser.vala | 164 ++++++++++++++++++++++++++---------------
1 files changed, 103 insertions(+), 61 deletions(-)
---
diff --git a/gxml/css-selector-parser.vala b/gxml/css-selector-parser.vala
index 60bcc17..e89a1f8 100644
--- a/gxml/css-selector-parser.vala
+++ b/gxml/css-selector-parser.vala
@@ -57,12 +57,20 @@ public struct GXml.CssSelectorData {
public class GXml.CssSelectorParser : GLib.Object {
Gee.ArrayList<CssSelectorData?> list;
-
+
+ public Gee.List<CssSelectorData?> selectors {
+ get {
+ return list;
+ }
+ }
+
construct {
list = new Gee.ArrayList<CssSelectorData?>();
}
-
+
void parse_class (string css, ref int position) {
+ CssSelectorData idata = { CssSelectorType.INSIDE, " " };
+ list.add (idata);
position++;
StringBuilder sb = new StringBuilder();
unichar u = 0;
@@ -71,8 +79,10 @@ public class GXml.CssSelectorParser : GLib.Object {
CssSelectorData data = { CssSelectorType.CLASS, sb.str };
list.add (data);
}
-
+
void parse_id (string css, ref int position) {
+ CssSelectorData idata = { CssSelectorType.INSIDE, " " };
+ list.add (idata);
position++;
StringBuilder sb = new StringBuilder();
unichar u = 0;
@@ -81,13 +91,13 @@ public class GXml.CssSelectorParser : GLib.Object {
CssSelectorData data = { CssSelectorType.ID, sb.str };
list.add (data);
}
-
+
void parse_all (string css, ref int position) {
position++;
CssSelectorData data = { CssSelectorType.ALL, "*" };
list.add (data);
}
-
+
void parse_element (string css, ref int position) {
StringBuilder sb = new StringBuilder();
unichar u = 0;
@@ -95,10 +105,11 @@ public class GXml.CssSelectorParser : GLib.Object {
sb.append_unichar (u);
CssSelectorData data = { CssSelectorType.ELEMENT, sb.str };
list.add (data);
- css.get_prev_char (ref position, out u);
}
-
+
void parse_attribute (string css, ref int position) throws GLib.Error {
+ CssSelectorData idata = { CssSelectorType.INSIDE, " " };
+ list.add (idata);
position++;
StringBuilder sb = new StringBuilder();
unichar u = 0;
@@ -194,8 +205,10 @@ public class GXml.CssSelectorParser : GLib.Object {
data.value = sb1.str;
list.add (data);
}
-
+
void parse_pseudo (string css, ref int position) throws GLib.Error {
+ CssSelectorData idata = { CssSelectorType.INSIDE, " " };
+ list.add (idata);
position++;
StringBuilder sb = new StringBuilder();
unichar u = 0;
@@ -218,77 +231,106 @@ public class GXml.CssSelectorParser : GLib.Object {
CssSelectorData data = { CssSelectorType.PSEUDO, sb.str };
list.add (data);
}
-
+
public void parse (string query) throws GLib.Error {
string css = query.strip();
if (css.length == 0)
throw new CssSelectorError.LENGTH ("invalid string length.");
int position = 0;
+ unichar u = 0;
while (position < css.length) {
- message ("position : %d (%s)", position, css.substring (position, 1));
- if (list.size > 0) {
- var inside = list.get (list.size-1);
- if (inside.selector_type == CssSelectorType.INSIDE) {
- if (css.substring (position, 1) == ".")
- parse_class (css, ref position);
- else if (css.substring (position, 1) == "#")
- parse_id (css, ref position);
- else if (css.substring (position, 1) == "[") {
- parse_attribute (css, ref position);
- }
- else if (css.substring (position, 1) == ":")
- parse_pseudo (css, ref position);
- else if (css.substring (position, 1) == ",") {
- position++;
- CssSelectorData data = { CssSelectorType.AND, "," };
- list.add (data);
- }
- else if (css.substring (position, 1) == "+") {
- position++;
- CssSelectorData data = { CssSelectorType.AFTER, "+" };
- list.add (data);
- }
- else if (css.substring (position, 1) == "~") {
- position++;
- CssSelectorData data = { CssSelectorType.BEFORE, "~" };
- list.add (data);
- }
- else if (css.substring (position, 1) == ">") {
- position++;
- CssSelectorData data = { CssSelectorType.PARENT, ">" };
- list.add (data);
+ message ("position : %d (%s)\n", position, css.substring (position, 1));
+ u = css.get_char (position);
+ if (u.isspace()) {
+ css.get_next_char (ref position, out u);
+ while (u.isspace())
+ css.get_next_char (ref position, out u);
+ position--;
+ }
+ if (selectors.size > 0) {
+ var ps = selectors.get (selectors.size -1);
+ if (ps != null) {
+ if (ps.selector_type == CssSelectorType.ELEMENT) {
+ css.get_prev_char (ref position, out u);
+ if (u == '.') {
+ parse_class (css, ref position);
+ continue;
+ }
+ else if (u == '#') {
+ parse_id (css, ref position);
+ continue;
+ }
+ else if (u == '[') {
+ parse_attribute (css, ref position);
+ continue;
+ }
+ else if (u == ':') {
+ parse_pseudo (css, ref position);
+ continue;
+ }
+ else
+ throw new CssSelectorError.TYPE ("invalid '%s'
character.".printf (css.substring (position, 1)));
}
}
}
- else if (css.substring (position, 1) == "*")
+ if (u == '*')
parse_all (css, ref position);
- else if (css.substring (position, 1).get_char (0).isalnum())
+ else if (u.isalnum())
parse_element (css, ref position);
- if (position >= css.length) break;
- if (css.substring (position, 1).get_char (0).isspace()) {
- message ("Skiping Spaces: position : %d (%s)", position, css.substring (position,
1));
- while (css.substring (position, 1).get_char (0).isspace())
- position++;
+ else if (u == ',') {
+ position++;
+ CssSelectorData data = { CssSelectorType.AND, "," };
+ list.add (data);
+ }
+ else if (u == '+') {
+ position++;
+ CssSelectorData data = { CssSelectorType.AFTER, "+" };
+ list.add (data);
+ }
+ else if (u == '~') {
+ position++;
+ CssSelectorData data = { CssSelectorType.BEFORE, "~" };
+ list.add (data);
}
- message ("Next: position : %d (%s)", position, css.substring (position, 1));
- if (list.size > 0 && list[list.size - 1].selector_type != CssSelectorType.AND &&
list[list.size - 1].selector_type != CssSelectorType.PARENT
- && list[list.size - 1].selector_type != CssSelectorType.BEFORE &&
list[list.size - 1].selector_type != CssSelectorType.AFTER)
- {
- message ("Inside");
- CssSelectorData data = { CssSelectorType.INSIDE, " " };
+ else if (u == '>') {
+ position++;
+ CssSelectorData data = { CssSelectorType.PARENT, ">" };
list.add (data);
}
-// else
-// throw new CssSelectorError.TYPE ("invalid '%s' character.".printf
(css.substring (position, 1)));
+// if (list.size > 0 && list[list.size - 1].selector_type != CssSelectorType.AND &&
list[list.size - 1].selector_type != CssSelectorType.PARENT
+// && list[list.size - 1].selector_type != CssSelectorType.BEFORE &&
list[list.size - 1].selector_type != CssSelectorType.AFTER
+// && list[list.size - 1].selector_type == CssSelectorType.ELEMENT && position <
css.length)
+// {
+//
+// }
}
foreach (var data in list)
- print ("%s\n", data.selector_type.to_string());
+ message ("%s\n", data.selector_type.to_string());
}
-
- public Gee.List<CssSelectorData?> selectors {
- get {
- return list;
+ public bool match (DomElement element) {
+ bool is_element = false;
+ bool is_inside = false;
+ for (int i = 0; i < selectors.size; i++) {
+ CssSelectorData s = selectors.get (i);
+ if (s.selector_type == CssSelectorType.ALL) return true;
+ if (s.selector_type == CssSelectorType.ELEMENT) {
+ if (element.node_name.down () != s.data.down ()) return false;
+ is_element = true;
+ if ((i+1) >= selectors.size) return true;
+ continue;
+ }
+ if (is_element && s.selector_type != CssSelectorType.INSIDE) return true;
+ if (is_element && s.selector_type == CssSelectorType.INSIDE) {
+ is_inside = true;
+ continue;
+ }
+ if (is_element && is_inside && s.selector_type == CssSelectorType.ATTRIBUTE) {
+ var p = element.get_attribute (s.data);
+ if (p != null) return true;
+ }
}
+ return false;
}
+
}
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