mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
123 lines
2.4 KiB
123 lines
2.4 KiB
/*
|
|
* @doc INTERNAL
|
|
*
|
|
* @module HYPH.CPP -- Hyphenation class |
|
|
*
|
|
* A table which holds the non-standard hyphenation cases. We store
|
|
* these entries in the table because we cache the results of hyphenation
|
|
* in our CLine structure, storing the actual WCHAR and khyph would cost
|
|
* 4 bytes. With this mechanism we can use 5 bits.
|
|
*
|
|
*
|
|
* Several elements are reserved:
|
|
* 0 - No hyphenation
|
|
* 1 - Normal hyphenation
|
|
* 2 - Delete before
|
|
*
|
|
* All other ones contain a khyph and a WCHAR.
|
|
* If performance is an issue, this table could be sorted and binary
|
|
* searched. We assume this table typically has few entries in use.
|
|
*
|
|
* Owner:<nl>
|
|
* Keith Curtis: Created
|
|
*
|
|
* Copyright (c) 1995-1999, Microsoft Corporation. All rights reserved.
|
|
*/
|
|
#include <_common.h>
|
|
#include <_array.h>
|
|
#include <_hyph.h>
|
|
|
|
const int chyphReserved = 3;
|
|
|
|
extern CHyphCache *g_phc;
|
|
|
|
void FreeHyphCache(void)
|
|
{
|
|
delete g_phc;
|
|
}
|
|
|
|
/*
|
|
* CHyphCache::Add (khyph, chHyph)
|
|
*
|
|
* @mfunc
|
|
* Adds a new special hyphenation entry to the cache
|
|
*
|
|
* @rdesc
|
|
* ihyph to be used
|
|
*/
|
|
int CHyphCache::Add(UINT khyph, WCHAR chHyph)
|
|
{
|
|
HYPHENTRY he;
|
|
he.khyph = khyph;
|
|
he.chHyph = chHyph;
|
|
|
|
HYPHENTRY *phe;
|
|
if (phe = CArray<HYPHENTRY>::Add(1, NULL))
|
|
{
|
|
*phe = he;
|
|
return Count() + chyphReserved - 1;
|
|
}
|
|
return 1; //If we run out of memory, just do normal hyphenation
|
|
}
|
|
|
|
/*
|
|
* CHyphCache::Find(khyph, chHyph)
|
|
*
|
|
* @mfunc
|
|
* Finds a special hyphenation entry in the cache.
|
|
* If it doesn't exist, then it will add it.
|
|
*
|
|
* @rdesc
|
|
* index into table if successful, FALSE if failed
|
|
*/
|
|
int CHyphCache::Find(UINT khyph, WCHAR chHyph)
|
|
{
|
|
HYPHENTRY *phe = Elem(0);
|
|
|
|
//Special cases
|
|
if (khyph <= khyphNormal)
|
|
return khyph;
|
|
if (khyph == khyphDeleteBefore)
|
|
return 2;
|
|
|
|
for (int ihyph = 0; ihyph < Count(); ihyph++, phe++)
|
|
{
|
|
if (chHyph == phe->chHyph && phe->khyph == khyph)
|
|
return ihyph + chyphReserved;
|
|
}
|
|
|
|
//Not found, so add
|
|
return Add(khyph, chHyph);
|
|
}
|
|
|
|
/*
|
|
* CHyphCache::GetAt(iHyph, khyph, chHyph)
|
|
*
|
|
* @mfunc
|
|
* Given an ihyph as stored in the CLine array, fill in
|
|
* the khyph and the chHyph
|
|
*
|
|
* @rdesc
|
|
* void
|
|
*/
|
|
void CHyphCache::GetAt(int ihyph, UINT & khyph, WCHAR & chHyph)
|
|
{
|
|
Assert(ihyph - chyphReserved < Count());
|
|
|
|
//Special cases
|
|
if (ihyph <= 2)
|
|
{
|
|
chHyph = 0;
|
|
if (ihyph <= khyphNormal)
|
|
khyph = ihyph;
|
|
if (ihyph == 2)
|
|
khyph = khyphDeleteBefore;
|
|
return;
|
|
}
|
|
|
|
ihyph -= chyphReserved;
|
|
HYPHENTRY *phe = Elem(ihyph);
|
|
khyph = phe->khyph;
|
|
chHyph = phe->chHyph;
|
|
return;
|
|
}
|