252 lines
7.2 KiB
C++
252 lines
7.2 KiB
C++
// 12 february 2017
|
|
#include "uipriv_windows.hpp"
|
|
#include "draw.hpp"
|
|
|
|
// TODO this whole file needs cleanup
|
|
|
|
// we need to combine color and underline style into one unit for IDWriteLayout::SetDrawingEffect()
|
|
// we also need to collect all the background blocks and add them all at once
|
|
// TODO contextual alternates override ligatures?
|
|
// TODO rename this struct to something that isn't exclusively foreach-ing?
|
|
struct foreachParams {
|
|
const uint16_t *s;
|
|
size_t len;
|
|
IDWriteTextLayout *layout;
|
|
std::map<size_t, textDrawingEffect *> *effects;
|
|
std::vector<backgroundFunc> *backgroundFuncs;
|
|
};
|
|
|
|
static void ensureEffectsInRange(struct foreachParams *p, size_t start, size_t end, std::function<void(textDrawingEffect *)> f)
|
|
{
|
|
size_t i;
|
|
size_t *key;
|
|
textDrawingEffect *t;
|
|
|
|
// TODO explain why we make one for every character
|
|
for (i = start; i < end; i++) {
|
|
t = (*(p->effects))[i];
|
|
if (t != NULL) {
|
|
f(t);
|
|
continue;
|
|
}
|
|
t = new textDrawingEffect;
|
|
f(t);
|
|
(*(p->effects))[i] = t;
|
|
}
|
|
}
|
|
|
|
static backgroundFunc mkBackgroundFunc(size_t start, size_t end, double r, double g, double b, double a)
|
|
{
|
|
return [=](uiDrawContext *c, uiDrawTextLayout *layout, double x, double y) {
|
|
uiDrawBrush brush;
|
|
|
|
brush.Type = uiDrawBrushTypeSolid;
|
|
brush.R = r;
|
|
brush.G = g;
|
|
brush.B = b;
|
|
brush.A = a;
|
|
drawTextBackground(c, x, y, layout, start, end, &brush, 0);
|
|
};
|
|
}
|
|
|
|
static uiForEach processAttribute(uiAttributedString *s, uiAttributeSpec *spec, size_t start, size_t end, void *data)
|
|
{
|
|
struct foreachParams *p = (struct foreachParams *) data;
|
|
DWRITE_TEXT_RANGE range;
|
|
WCHAR *wfamily;
|
|
size_t ostart, oend;
|
|
BOOL hasUnderline;
|
|
IDWriteTypography *dt;
|
|
HRESULT hr;
|
|
|
|
ostart = start;
|
|
oend = end;
|
|
start = attrstrUTF8ToUTF16(s, start);
|
|
end = attrstrUTF8ToUTF16(s, end);
|
|
range.startPosition = start;
|
|
range.length = end - start;
|
|
switch (spec->Type) {
|
|
case uiAttributeFamily:
|
|
wfamily = toUTF16(spec->Family);
|
|
hr = p->layout->SetFontFamilyName(wfamily, range);
|
|
if (hr != S_OK)
|
|
logHRESULT(L"error applying family name attribute", hr);
|
|
uiFree(wfamily);
|
|
break;
|
|
case uiAttributeSize:
|
|
hr = p->layout->SetFontSize(
|
|
// TODO unify with drawtext.cpp
|
|
#define pointSizeToDWriteSize(size) (size * (96.0 / 72.0))
|
|
pointSizeToDWriteSize(spec->Double),
|
|
range);
|
|
if (hr != S_OK)
|
|
logHRESULT(L"error applying size attribute", hr);
|
|
break;
|
|
case uiAttributeWeight:
|
|
// TODO reverse the misalignment from drawtext.cpp if it is corrected
|
|
hr = p->layout->SetFontWeight(
|
|
(DWRITE_FONT_WEIGHT) (spec->Value),
|
|
range);
|
|
if (hr != S_OK)
|
|
logHRESULT(L"error applying weight attribute", hr);
|
|
break;
|
|
case uiAttributeItalic:
|
|
hr = p->layout->SetFontStyle(
|
|
dwriteItalics[(uiDrawTextItalic) (spec->Value)],
|
|
range);
|
|
if (hr != S_OK)
|
|
logHRESULT(L"error applying italic attribute", hr);
|
|
break;
|
|
case uiAttributeStretch:
|
|
hr = p->layout->SetFontStretch(
|
|
dwriteStretches[(uiDrawTextStretch) (spec->Value)],
|
|
range);
|
|
if (hr != S_OK)
|
|
logHRESULT(L"error applying stretch attribute", hr);
|
|
break;
|
|
case uiAttributeColor:
|
|
ensureEffectsInRange(p, start, end, [=](textDrawingEffect *t) {
|
|
t->hasColor = true;
|
|
t->r = spec->R;
|
|
t->g = spec->G;
|
|
t->b = spec->B;
|
|
t->a = spec->A;
|
|
});
|
|
break;
|
|
case uiAttributeBackground:
|
|
p->backgroundFuncs->push_back(
|
|
mkBackgroundFunc(ostart, oend,
|
|
spec->R, spec->G, spec->B, spec->A));
|
|
break;
|
|
case uiAttributeUnderline:
|
|
ensureEffectsInRange(p, start, end, [=](textDrawingEffect *t) {
|
|
t->hasUnderline = true;
|
|
t->u = (uiDrawUnderlineStyle) (spec->Value);
|
|
});
|
|
// mark that we have an underline; otherwise, DirectWrite will never call our custom renderer's DrawUnderline() method
|
|
hasUnderline = FALSE;
|
|
if ((uiDrawUnderlineStyle) (spec->Value) != uiDrawUnderlineStyleNone)
|
|
hasUnderline = TRUE;
|
|
hr = p->layout->SetUnderline(hasUnderline, range);
|
|
if (hr != S_OK)
|
|
logHRESULT(L"error applying underline attribute", hr);
|
|
break;
|
|
case uiAttributeUnderlineColor:
|
|
switch (spec->Value) {
|
|
case uiDrawUnderlineColorCustom:
|
|
ensureEffectsInRange(p, start, end, [=](textDrawingEffect *t) {
|
|
t->hasUnderlineColor = true;
|
|
t->ur = spec->R;
|
|
t->ug = spec->G;
|
|
t->ub = spec->B;
|
|
t->ua = spec->A;
|
|
});
|
|
break;
|
|
// TODO see if Microsoft has any standard colors for this
|
|
case uiDrawUnderlineColorSpelling:
|
|
// TODO GtkTextView style property error-underline-color
|
|
ensureEffectsInRange(p, start, end, [=](textDrawingEffect *t) {
|
|
t->hasUnderlineColor = true;
|
|
t->ur = 1.0;
|
|
t->ug = 0.0;
|
|
t->ub = 0.0;
|
|
t->ua = 1.0;
|
|
});
|
|
break;
|
|
case uiDrawUnderlineColorGrammar:
|
|
ensureEffectsInRange(p, start, end, [=](textDrawingEffect *t) {
|
|
t->hasUnderlineColor = true;
|
|
t->ur = 0.0;
|
|
t->ug = 1.0;
|
|
t->ub = 0.0;
|
|
t->ua = 1.0;
|
|
});
|
|
break;
|
|
case uiDrawUnderlineColorAuxiliary:
|
|
ensureEffectsInRange(p, start, end, [=](textDrawingEffect *t) {
|
|
t->hasUnderlineColor = true;
|
|
t->ur = 0.0;
|
|
t->ug = 0.0;
|
|
t->ub = 1.0;
|
|
t->ua = 1.0;
|
|
});
|
|
break;
|
|
}
|
|
break;
|
|
case uiAttributeFeatures:
|
|
// TODO make sure this behaves properly if spec->Features is NULL
|
|
dt = otfToDirectWrite(spec->Features);
|
|
hr = p->layout->SetTypography(dt, range);
|
|
if (hr != S_OK)
|
|
logHRESULT(L"error applying features attribute", hr);
|
|
dt->Release();
|
|
break;
|
|
default:
|
|
// TODO complain
|
|
;
|
|
}
|
|
return uiForEachContinue;
|
|
}
|
|
|
|
static void applyAndFreeEffectsAttributes(struct foreachParams *p)
|
|
{
|
|
size_t i, n;
|
|
textDrawingEffect *effect, *effectb;
|
|
DWRITE_TEXT_RANGE range;
|
|
static auto apply = [](IDWriteTextLayout *layout, textDrawingEffect *effect, DWRITE_TEXT_RANGE range) {
|
|
HRESULT hr;
|
|
|
|
if (effect == NULL)
|
|
return;
|
|
hr = layout->SetDrawingEffect(effect, range);
|
|
if (hr != S_OK)
|
|
logHRESULT(L"error applying drawing effects attributes", hr);
|
|
effect->Release();
|
|
};
|
|
|
|
// go through, fililng in the effect attribute for successive ranges of identical textDrawingEffects
|
|
// we are best off treating series of identical effects as single ranges ourselves for parity across platforms, even if Windows does something similar itself
|
|
// this also avoids breaking apart surrogate pairs (though IIRC Windows doing the something similar itself might make this a non-issue here)
|
|
effect = NULL;
|
|
n = p->len;
|
|
range.startPosition = 0;
|
|
for (i = 0; i < n; i++) {
|
|
effectb = (*(p->effects))[i];
|
|
// run of no effect?
|
|
if (effect == NULL && effectb == NULL)
|
|
continue;
|
|
// run of the same effect?
|
|
if (effect != NULL && effectb != NULL)
|
|
if (effect->same(effectb)) {
|
|
effectb->Release();
|
|
continue;
|
|
}
|
|
|
|
// the effect has changed; commit the old effect
|
|
range.length = i - range.startPosition;
|
|
apply(p->layout, effect, range);
|
|
|
|
range.startPosition = i;
|
|
effect = effectb;
|
|
}
|
|
// and apply the last effect
|
|
range.length = i - range.startPosition;
|
|
apply(p->layout, effect, range);
|
|
|
|
delete p->effects;
|
|
}
|
|
|
|
void attrstrToIDWriteTextLayoutAttrs(uiDrawTextLayoutParams *p, IDWriteTextLayout *layout, std::vector<backgroundFunc> **backgroundFuncs)
|
|
{
|
|
struct foreachParams fep;
|
|
|
|
fep.s = attrstrUTF16(p->String);
|
|
fep.len = attrstrUTF16Len(p->String);
|
|
fep.layout = layout;
|
|
fep.effects = new std::map<size_t, textDrawingEffect *>;
|
|
fep.backgroundFuncs = new std::vector<backgroundFunc>;
|
|
uiAttributedStringForEachAttribute(p->String, processAttribute, &fep);
|
|
applyAndFreeEffectsAttributes(&fep);
|
|
*backgroundFuncs = fep.backgroundFuncs;
|
|
}
|