Terra Informatica

Announce: ScIDE

Andrew — Sun, 03 Aug 2008 18:40:36 +0000

ScIDE is a compact and handy source code editor with syntax highlighting (colorizing). ScIDE is a system of HTML, CSS and scripting files that are running inside the Sciter. So ScIDE is so-called .scapp - Sciter application. You can run ScIDE: inside Sciter.exe player (part of main SDK distribution) or as a separate application ScIDE.exe that is [...]

CSSS! and computational complexity of selectors.

Andrew — Fri, 25 Jul 2008 20:51:49 +0000

Lets say we have following markup: <ul> <li>First</li> <li>Second (with <a href=#>hyperlink</a>)</li> <li>Third</li> <li>Fourth (with <a href=#>hyperlink</a> too)</li> </ul> and the styling task: all <li> that have <a> elements inside have yellow background. If we would have hypothetic selector :with-child(selector) then we could write this as: li:with-child(a:link) { background:yellow; } Problem with this [...]

CSS, selectors and computational complexity

Andrew — Wed, 23 Jul 2008 18:57:24 +0000

CSS (Cascading style sheets) has pretty extensive set of so called selectors. Example: ul[type="1"] > li { list-style-type: decimal; } Selector here means following: each li element that is immediate child of ul that has attribute type with the value "1" has that style. Selectors and assosiated styles constitute static system of styles. And so they obey following rule [...]

Generators in C++ revisited.

Andrew — Thu, 26 Jun 2008 02:09:21 +0000

Previous version of generators had design problem - it required some special stop value. That is the same kind of problem as with iterators in C++. In some cases it is not possible to choose such a value. So is this new version: // generator/continuation for C++ // author: Andrew Fedoniouk @ terrainformatica.com // idea borrowed from: "coroutines in [...]

Generators in C++

Andrew — Tue, 27 May 2008 02:19:14 +0000

As we know iterators in C++ is a good but not perfect abstraction. Concept of foreach() (D, Python, Ruby, etc.) appears as more generic solution. At least foreach() does not require artificial iterator::end() to be defined for the collection. Abstraction foreach() can be imagined as some function/object that is returning next value of collection/sequence each time [...]

INPUT, WIDGET and custom elements in h-smile core

Andrew — Fri, 28 Mar 2008 19:15:14 +0000

What is a difference between <input> and <widget> elements [in h-smile core]? <input> is intrinsically display:inline-block element and <widget> is intrinsically display:block element. So <input> can live only in some element that has display-model:inline-inside model, in other words in some text container like <p> (paragraph). So if you have markup as: <div> Text: <input type=... /> </div> engine is [...]

JavaScript. Private members (instance variables).

Andrew — Thu, 13 Mar 2008 21:28:55 +0000

As you know JavaScript has no concept of private members in objects. Objects there are “racks of properties” that anyone can change. Here is a simple way of making “objects” in JS that have private instance variables. Such variables can be changed only by [public] methods you provide. Consider following code: function CreateMyObject() { [...]

Sciter. Working with persistent data (database)

Andrew — Mon, 03 Mar 2008 05:08:23 +0000

Here is an example of minimalistic application working with DB (persistent data) in Sciter. This sample is using three files: simple-db-form.htm - main file of our application; db.tis - open or create database; form.tis - behavior that handles showing/saving data from list of input elements on the form. db.tis - open or create database This file contains single procedure that [...]

Shot of the day.

Andrew — Sun, 24 Feb 2008 07:32:38 +0000

View on Georgia Straight from Cypress Mountain - one of sites of Winter Olympic Games 2010. Vancouver, today.

Generator functions in Sciter and tiscript.

Andrew — Sun, 17 Feb 2008 07:47:39 +0000

Generator function is a function that produce sequence of values. Each call of such function returns next value of some sequence. Here is one possible implementation of generator function that can be used in Sciter. Idea of this implementation is borrowed from LUA programming language. Let’s say we would like to enumerate some array in [...]

HTMLayout build #3.3.0.10

>Fixes:

Wrong mouse position detection for position:fixed elements.
Outline is not rendered in header cells of scrollable table.
Wrong initialization of