source: branches/stable/WINDOW/aw_font_limits.hxx

Last change on this file was 15258, checked in by westram, 9 years ago
  • AW_font_limits
    • adds was_notified(); use as assertion
    • default ctor: initializer list
      • used by reset() (was: vice versa)
    • (assert) combining ctor works for default-constructed instances
    • bugfix: min_width was invalid for AW_GC::get_font_limits(char c)
  • AW_font_group
    • use another instance of AW_font_limits (instead of single variables) ⇒ default ctor works correct
    • unregisterAll() just reinitializes this
    • renames
  • Property svn:eol-style set to native
File size: 1.8 KB
Line 
1// ============================================================== //
2//                                                                //
3//   File: aw_font_limits.hxx                                     //
4//   http://www.arb-home.de/                                      //
5//                                                                //
6// ============================================================== //
7
8#ifndef AW_FONT_LIMITS_HXX
9#define AW_FONT_LIMITS_HXX
10
11#ifndef _GLIBCXX_CLIMITS
12#include <climits>
13#endif
14#ifndef _GLIBCXX_ALGORITHM
15#include <algorithm>
16#endif
17
18struct AW_font_limits {
19    short ascent;
20    short descent;
21    short width;
22    short min_width;
23
24    void reset() { *this = AW_font_limits(); }
25
26    bool was_notified() const { return min_width != SHRT_MAX; } // true when notify... called
27
28    void notify(short ascent_, short descent_, short width_) {
29        ascent    = std::max(ascent_, ascent);
30        descent   = std::max(descent_, descent);
31        width     = std::max(width_, width);
32        min_width = std::min(width_, min_width);
33    }
34
35    short get_height() const { return ascent+descent+1; }
36
37    bool is_monospaced() const { aw_assert(was_notified()); return width == min_width; }
38
39    AW_font_limits() :
40        ascent(0),
41        descent(0),
42        width(0),
43        min_width(SHRT_MAX)
44    {}
45    AW_font_limits(const AW_font_limits& lim1, const AW_font_limits& lim2) : // works with notified and initial AW_font_limits
46        ascent(std::max(lim1.ascent, lim2.ascent)),
47        descent(std::max(lim1.descent, lim2.descent)),
48        width(std::max(lim1.width, lim2.width)),
49        min_width(std::min(lim1.min_width, lim2.min_width))
50    {
51        aw_assert(correlated(lim1.was_notified() || lim2.was_notified(), was_notified()));
52    }
53};
54
55
56#else
57#error aw_font_limits.hxx included twice
58#endif // AW_FONT_LIMITS_HXX
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