I’m using QtWebKit (QWebView) to display text, and I want to implement a search functionality in it via QWebView::findText.
Problem is that the text that has to be displayed contains so-called Unicode’s Combining Diacritical Marks, and both QWebView::findText() and JavaScript’s window.find() don’t ignore those “marks” (characters) although they should.
For example, if there’s a word “ti̇̀krăs” (“t”, “i”, Combining Dot Above, Combining Grave Accent, “k”, “r”, “a”, Combining Breve, “s”) in the text, findText() is unable to find that word when searching for query “tikras” (“t”, “i”, “k”, “r”, “a”, “s”).
Other WebKit-based browsers (Chrome, Safari) seem to work fine in this case.
Is there anything I can do about this situation?
Related
I am trying to combine a symbol from the font range "combining diacritical marks for symbols" (20D5, Combining Clockwise Arrow Above) with an ordinary letter, and no luck. In fact, I don't seem to be able to combine it with any other character.
Now, I'm attempting this in MS Word 2010, using Arial Unicode MS, but I'm suspecting this is a question about unicode font combining rules, not about Word per se. (And FWIW, I do know the Word procedure to combine a normal diacritical with a normal character).
So the name of the group that 20D5 belongs to says "for symbols". So perhaps there's a rule that says it must combine only with "symbols". So I tried it with Currency Symbols, Letterlike Symbols, Miscellaneous Symbols, and no success.
So what characters are these "combining diacritical marks for symbols" supposed to combine with?
Let's take COMBINING ACUTE ACCENT, for example. Its browser test page does include it alone in the page, but it reacts in a strange way: I can't select it with my mouse, and if I try to interact with it in the DOM inspector, it feels like it's not part of the text at all (there's no before and after this character):
Is a combining character, used alone, still a valid Unicode string?
Or does it have to follow another character?
Yes, a combining character alone is a valid Unicode string (even though its behaviour may be weird without a base character). Section 2.11 of the Unicode Standard emphasises this:
In the Unicode Standard, all sequences of character codes are permitted.
The presentation of such strings is described in D52:
There may be no such base character, such as when a combining character is at the start of text or follows a control or format character [...] In such cases, the combining characters are called isolated combining characters.
With isolated combining characters or when a process is unable to perform graphical combination, a process may present a combining character without graphical combination; that is, it may present it as if it were a base character.
However, if you want to display a combining character by itself, it is recommended that you attach it to a no-break space base character:
Nonspacing combining marks used by the Unicode Standard may be exhibited in apparent
isolation by applying them to U+00A0 NO-BREAK SPACE. This convention might be
employed, for example, when talking about the combining mark itself as a mark, rather
than using it in its normal way in text (that is, applied as an accent to a base letter or in
other combinations).
Also, a dotted circle ◌ (U+25CC, ◌) character can be used as a base character.
Source: https://en.wikipedia.org/wiki/Dotted_circle
I'm having trouble breaking a word into its individual unicode components. I'm working with the devanagari script using google input tools. An example is र्म (pronounced -rm), which I want to break into म (-m) and the that hook at the top (-r). But I can't seem to find the unicode character that corresponds to the hook at the top. Here's some of the solutions I tried
1. copy and past र्म into MS word and hit alt x. But this breaks the word into र् and म. It doesn't give me the unicode character for the top hook
2. I tried the site http://shapecatcher.com/. I found a character called latin egyptological ain; while similar in shape, it cannot be used on top of another character. I'm looking the conjunct version of the hook.
Any help would be appreciated. I'm using TekMaker on Windows 8.
The ‘hook at the top’ representing a preceding र् is an inseparable part of the glyph for a variety of biconsonantal ligatures. It's not a discrete, freely-combinable diacritical mark as we would understand it in Latin-like scripts.
Consequently the visual rendering element doesn't have its own Unicode representation distinct from its linguistic meaning र्, sorry!
I have a document which has been sloppily authored. It's a dictionary that contains cyrillic characters. Most of the dictionary is manageable, but I'm stuck with one thing I need help with. Words have accented letters in them and they're mostly formatted properly as a letter with a unicode accent (thus forming a single letter). However there are some very peculiar letters that look similar for example to: a;´ (where "a" is any arbitrary cyrillic letter). You'd expect á in its place. However it wouldn't be a problem per se if only this thing could be exported to, say HTML and manipulated in a text editor. The problem is that Word treats this "thing" as a single character/entity and
when exporting it is COMPLETELY omitted
when copied it can only be pasted into Notepad (which translates it into three separate characters), when being pasted into WordPad it just won't appear at all.
when a search is run in Word it won't find the letter, neither the actual character nor the exactly copied/pasted combination.
the letter will disappear when the document is opened in any other software, such as Libre Office
At this point I'm trying to:
understand what this combination is exactly
run a search/replace operation to find and weed out all of those errors
Here's a sample Word file.
Here's a screenshot of the word/letter in question:
which when typed correctly should appear like "скре́пка".
The 'character' appears to be a Word field of type 'eq' (equation). Here is the field with toggled field codes:
If it is a large document you could try to create a VBA routine that removes the fields and replaces them with corresponding characters.
Assuming that #Anonimista’s analysis is correct, as I think it is, you could fix the file by running some search and replace operations in Word, replacing e.g. ^19eq \o(е;´)^21 by е́ (the latter is Cyrillic letter е followed by combining acute accent U+0301). This is dull because you would need to do this for each vowel separately (and for uppercase vowels too). But I cannot find a way to use wildcards in this context; the codes ^19 and ^21 for start and end of field work only when wildcards are not enabled.
I'm trying to gather a Unicode list of all the 'o' like shapes in the Hindi character-set. In fact, a list of any characters (in any language) that makes uses of separate characters to indicate an accent would be better.
I intend to use this unicode-list in a RegExp.
I been trying to edit a list of character-ranges by outputting them in an Input TextField, but editing this text causes weird issues (the keyboard-cursor isn't place on the correct character, selections suddenly dissappear / incorrectly warps... in other words... HINDI HELL!)
I've tried this with Notepad++ too, but although it was more responsive, it eventually crapped out on me like it did in the Flash Player textfield. This seems to occur especially while removing the [] block (nulls?) characters. Some of them trigger odd behaviors.
Anyways, all I want is a list of the accents.
An example of a few are in the image below (but I would need ALL accents):
Thanks!
You can find pdf's containing lists of unicode ranges, grouped by language, here: http://unicode.org/charts/
For Hindi, you probably want Devanagari or Devanagari Extended.
Here is the character class for Devanagari combining marks:
[\u901\u902\u903\u93c\u93e\u93f\u940\u941\u942\u943
\u944\u945\u946\u947\u948\u949\u94a\u94b\u94c\u94d
\u951\u952\u953\u954\u962\u963]
This is only the basic Devanagari block (not Devanagari Extended).
If you want the complete set (for all languages), you can do it problematically.
You start from the Unicode date file at ftp://ftp.unicode.org/Public/6.1.0/ucd/UnicodeData.txt, described by TR-44 (http://unicode.org/reports/tr44/#Property_Definitions)
You can use the Canonical_Combining_Class field (see at http://unicode.org/reports/tr44/#Canonical_Combining_Class_Values) to filter the exact characters you want.
Can't be more precise, because "accent" a bit vague :-)
You might even have to also look at General_Category to get the filter right (and exclude certain marks, or symbols, or punctuation).
And a script doing this would definitely be better than trying to mess with text editors.
One of the characteristics of combining characters is that they combine :-)
So you might get all kind of puzzling results (like this: http://www.siao2.com/2006/02/17/533929.aspx :-)