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piuText.c
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piuText.c
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/*
* Copyright (c) 2016-2017 Moddable Tech, Inc.
*
* This file is part of the Moddable SDK Runtime.
*
* The Moddable SDK Runtime is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The Moddable SDK Runtime is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with the Moddable SDK Runtime. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "piuAll.h"
typedef int16_t PiuTextKind;
typedef struct PiuTextLineStruct PiuTextLineRecord, *PiuTextLine;
typedef struct PiuTextNodeBeginStruct PiuTextNodeBeginRecord, *PiuTextNodeBegin;
typedef struct PiuTextNodeEndStruct PiuTextNodeEndRecord, *PiuTextNodeEnd;
typedef struct PiuTextNodeStringStruct PiuTextNodeStringRecord, *PiuTextNodeString;
enum {
piuTextWord = 0,
piuTextSpace = 1,
piuTextReturn = 2,
piuTextEnd = 4,
piuTextWordBreak = 8,
piuTextStyled = 1 << 24,
};
typedef struct {
PiuStyle* blockStyle;
PiuStyle* spanStyle;
PiuCoordinate blockWidth;
PiuTextOffset lineOffset;
PiuCoordinate lineWidth;
PiuCoordinate lineAscent;
PiuCoordinate lineHeight;
PiuTextOffset wordOffset;
PiuCoordinate wordWidth;
PiuCoordinate wordAscent;
PiuCoordinate wordHeight;
PiuCoordinate spaceCount;
PiuCoordinate spaceSum;
PiuCoordinate spaceWidth;
PiuCoordinate y;
} PiuTextFormatContextRecord, *PiuTextFormatContext;
struct PiuTextLineStruct {
PiuTextOffset textOffset;
PiuCoordinate x;
xsIntegerValue portion;
xsIntegerValue slop;
PiuCoordinate top;
PiuCoordinate base;
PiuCoordinate bottom;
};
enum {
piuTextNodeBeginBlockKind,
piuTextNodeBeginSpanKind,
piuTextNodeEndBlockKind,
piuTextNodeEndSpanKind,
piuTextNodeStringKind,
};
struct PiuTextNodeBeginStruct {
PiuTextKind kind;
PiuTextOffset parentOffset;
PiuStyle* style;
PiuStyle* computedStyle;
PiuTextLink* link;
};
struct PiuTextNodeEndStruct {
PiuTextKind kind;
PiuTextOffset parentOffset;
};
struct PiuTextNodeStringStruct {
PiuTextKind kind;
PiuTextOffset fromOffset;
xsSlot* string;
PiuTextOffset toOffset;
PiuTextOffset pad;
};
static void PiuTextLinkDelete(void* it);
static void PiuTextLinkDictionary(xsMachine* the, void* it);
static void PiuTextLinkMark(xsMachine* the, void* it, xsMarkRoot markRoot);
static PiuTextKind PiuTextAdvance(xsMachine* the, xsSlot* string, PiuTextOffset offset, PiuTextOffset limit, PiuTextOffset *nextOffset);
static void PiuTextBegin(PiuText* self);
static void PiuTextBeginNode(PiuText* self, PiuTextKind kind, PiuStyle* style, PiuTextLink* link);
static void PiuTextBind(void* it, PiuApplication* application, PiuView* view);
static void PiuTextBuild(PiuText* self, xsIntegerValue depth, PiuTextKind delta);
static void PiuTextCascade(void* it);
static void PiuTextComputeStyles(PiuText* self, PiuApplication* application, PiuView* view);
static void PiuTextConcat(PiuText* self, xsSlot* string);
static void PiuTextDictionary(xsMachine* the, void* it);
static void PiuTextDraw(void* it, PiuView* view, PiuRectangle area);
static void PiuTextEnd(PiuText* self);
static void PiuTextEndNode(PiuText* self, PiuTextKind kind);
static void PiuTextFitHorizontally(void* it);
static void PiuTextFormat(PiuText* self);
static void PiuTextFormatBlock(PiuText* self, PiuTextFormatContext ctx, PiuTextKind kind, PiuTextOffset length, PiuTextOffset textOffset);
static void PiuTextFormatLine(PiuText* self, PiuTextFormatContext ctx, PiuTextKind kind, PiuTextOffset length);
static void* PiuTextHit(void* it, PiuCoordinate x, PiuCoordinate y);
static void PiuTextMark(xsMachine* the, void* it, xsMarkRoot markRoot);
static void PiuTextMeasureVertically(void* it);
static void PiuTextUnbind(void* it, PiuApplication* application, PiuView* view);
static void PiuTextUncomputeStyles(PiuText* self, PiuApplication* application, PiuView* view);
const PiuDispatchRecord ICACHE_FLASH_ATTR PiuTextLinkDispatchRecord = {
"Link",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
PiuContentIdle,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
};
const xsHostHooks ICACHE_FLASH_ATTR PiuTextLinkHooks = {
PiuTextLinkDelete,
PiuTextLinkMark,
NULL
};
const PiuDispatchRecord ICACHE_FLASH_ATTR PiuTextDispatchRecord = {
"Text",
PiuTextBind,
PiuTextCascade,
PiuTextDraw,
PiuTextFitHorizontally,
PiuContentFitVertically,
PiuTextHit,
PiuContentIdle,
PiuContentInvalidate,
PiuContentMeasureHorizontally,
PiuTextMeasureVertically,
PiuContentPlace,
NULL,
NULL,
PiuContentReflow,
PiuContentShowing,
PiuContentShown,
PiuContentSync,
PiuTextUnbind,
PiuContentUpdate
};
const xsHostHooks ICACHE_FLASH_ATTR PiuTextHooks = {
PiuContentDelete,
PiuTextMark,
NULL
};
#define piuTextDepth 8
#define KIND(_OFFSET) *((PiuTextKind*)((uint8_t*)(*nodeBuffer) + _OFFSET))
#define LINE(_OFFSET) ((PiuTextLine)((uint8_t*)(*lineBuffer) + _OFFSET))
#define NODE(_OFFSET) ((void*)((uint8_t*)(*nodeBuffer) + _OFFSET))
void PiuTextBufferAppend(xsMachine *the, PiuTextBuffer* buffer, void* data, size_t size)
{
size_t available = (*buffer)->available;
size_t former = (*buffer)->current;
size_t current = former + size;
if (current > available) {
void* chunk;
available += size;
chunk = fxRenewChunk(the, *buffer, available);
if (!chunk) {
chunk = fxNewChunk(the, available);
c_memcpy(chunk, *buffer, former);
*buffer = chunk;
}
(*buffer)->available = available;
}
c_memcpy(((uint8_t*)(*buffer)) + former, data, size);
(*buffer)->current = current;
}
void PiuTextBufferClear(xsMachine* the, PiuTextBuffer* buffer)
{
size_t available = (*buffer)->available;
size_t current = (*buffer)->current = sizeof(PiuTextBufferRecord);
c_memset(((uint8_t*)(*buffer)) + current, 0, available - current);
}
void PiuTextBufferGrow(xsMachine *the, PiuTextBuffer* buffer, size_t size)
{
size_t available = (*buffer)->available;
size_t former = (*buffer)->current;
size_t current = former + size;
if (current > available) {
void* chunk;
available += size;
chunk = fxRenewChunk(the, *buffer, available);
if (!chunk) {
chunk = fxNewChunk(the, available);
c_memcpy(chunk, *buffer, former);
*buffer = chunk;
}
c_memset(((uint8_t*)(*buffer)) + former, 0, available - former);
(*buffer)->available = available;
}
(*buffer)->current = current;
}
void PiuTextBufferNew(xsMachine* the, size_t available)
{
PiuTextBuffer* buffer;
xsResult = xsNewHostObject(NULL);
xsSetHostChunk(xsResult, NULL, sizeof(PiuTextBufferRecord) + available);
buffer = PIU(TextBuffer, xsResult);
(*buffer)->reference = xsToReference(xsResult);
(*buffer)->available = sizeof(PiuTextBufferRecord) + available;
(*buffer)->current = sizeof(PiuTextBufferRecord);
}
void PiuTextLinkDelete(void* it)
{
}
void PiuTextLinkDictionary(xsMachine* the, void* it)
{
PiuTextLink* self = it;
if (xsFindResult(xsArg(1), xsID_anchor)) {
if (xsTest(xsArg(0))) {
xsSetAt(xsArg(0), xsResult, xsThis);
}
}
if (xsFindResult(xsArg(1), xsID_Behavior)) {
if (xsIsInstanceOf(xsResult, xsFunctionPrototype)) {
fxPush(xsResult);
fxNew(the);
fxRunCount(the, 0);
xsResult = fxPop();
(*self)->behavior = xsToReference(xsResult);
}
}
else if (xsFindResult(xsArg(1), xsID_behavior)) {
if (xsIsInstanceOf(xsResult, xsObjectPrototype)) {
(*self)->behavior = xsToReference(xsResult);
}
}
}
void PiuTextLinkMark(xsMachine* the, void* it, xsMarkRoot markRoot)
{
PiuTextLink self = it;
PiuMarkReference(the, self->behavior);
}
void PiuTextLink_create(xsMachine* the)
{
PiuTextLink* self;
xsVars(4);
xsSetHostChunk(xsThis, NULL, sizeof(PiuTextLinkRecord));
self = PIU(TextLink, xsThis);
(*self)->the = the;
(*self)->reference = xsToReference(xsThis);
xsSetHostHooks(xsThis, (xsHostHooks*)&PiuTextLinkHooks);
(*self)->dispatch = (PiuDispatch)&PiuTextLinkDispatchRecord;
(*self)->flags = piuVisible | piuActive | piuExclusiveTouch;
PiuTextLinkDictionary(the, self);
PiuBehaviorOnCreate(self);
}
void PiuTextLink_get_state(xsMachine* the)
{
PiuTextLink* self = PIU(TextLink, xsThis);
xsResult = xsNumber((*self)->state);
}
void PiuTextLink_set_state(xsMachine* the)
{
PiuTextLink* self = PIU(TextLink, xsThis);
double state = xsToNumber(xsArg(0));
if ((*self)->state != state) {
(*self)->state = state;
PiuContentInvalidate((*self)->container, NULL);
}
}
PiuTextKind PiuTextAdvance(xsMachine* the, xsSlot* string, PiuTextOffset offset, PiuTextOffset limit, PiuTextOffset *nextOffset)
{
PiuTextOffset length = 0;
PiuTextKind kind = piuTextWord;
if (offset == limit)
kind = piuTextEnd;
else {
xsIntegerValue c;
xsStringValue p = xsToString(*string) + offset;
xsStringValue q = fxUTF8Decode(p, &c);
length = q - p;
if ((c == C_EOF) || (c == 0))
kind = piuTextEnd;
if (length == 1) {
if (c == '\n')
kind = piuTextReturn;
else if (c == '\t')
kind = piuTextSpace;
else if (c == ' ')
kind = piuTextSpace;
}
else {
if (c == 0xA0)
kind = piuTextSpace;
else if ((0x4E00 <= c) && (c <= 0x9FFF))
kind = piuTextWordBreak;
}
}
*nextOffset = offset + length;
return kind;
}
void PiuTextBegin(PiuText* self)
{
xsMachine *the = (*self)->the;
PiuTextBufferClear(the, (*self)->nodeBuffer);
(*self)->nodeLink = NULL;
(*self)->nodeOffset = -1;
(*self)->textOffset = 0;
}
void PiuTextBeginNode(PiuText* self, PiuTextKind kind, PiuStyle* style, PiuTextLink* link)
{
xsMachine *the = (*self)->the;
PiuTextBuffer* nodeBuffer = (*self)->nodeBuffer;
PiuTextOffset nodeOffset = (PiuTextOffset)(*nodeBuffer)->current;
PiuTextNodeBegin nodeBegin;
PiuTextBufferGrow(the, nodeBuffer, sizeof(PiuTextNodeBeginRecord));
nodeBegin = NODE(nodeOffset);
nodeBegin->kind = kind;
nodeBegin->parentOffset = (*self)->nodeOffset;
nodeBegin->style = style;
if (link) {
(*self)->nodeLink = link;
(*link)->container = (PiuContainer*)self;
}
nodeBegin->link = (*self)->nodeLink;
(*self)->nodeOffset = nodeOffset;
}
void PiuTextBind(void* it, PiuApplication* application, PiuView* view)
{
PiuText* self = it;
PiuContentBind(it, application, view);
PiuTextComputeStyles(self, application, view);
}
void PiuTextBuild(PiuText* self, xsIntegerValue depth, PiuTextKind delta)
{
xsMachine *the = (*self)->the;
PiuStyle* style;
PiuTextLink* link;
if (xsTest(xsVar(depth))) {
if (xsIsInstanceOf(xsVar(depth), xsArrayPrototype)) {
xsIntegerValue i, c = xsToInteger(xsGet(xsVar(depth), xsID_length));
for (i = 0; i < c; i++) {
xsResult = xsGetAt(xsVar(depth) , xsInteger(i));
if (xsIsInstanceOf(xsResult, xsObjectPrototype)) {
depth++;
if (depth == piuTextDepth)
xsUnknownError("too deep");
xsVar(depth) = xsGet(xsResult, xsID_style);
if (xsTest(xsVar(depth)))
style = PIU(Style, xsVar(depth));
else
style = NULL;
xsVar(depth) = xsGet(xsResult, xsID_link);
if (xsTest(xsVar(depth)))
link = PIU(TextLink, xsVar(depth));
else
link = NULL;
PiuTextBeginNode(self, piuTextNodeBeginBlockKind + delta, style, link);
xsVar(depth) = xsGet(xsResult, xsID_spans);
PiuTextBuild(self, depth, 1);
PiuTextEndNode(self, piuTextNodeEndBlockKind + delta);
depth--;
}
else {
if (!delta)
PiuTextBeginNode(self, piuTextNodeBeginBlockKind, NULL, NULL);
PiuTextConcat(self, PiuString(xsResult));
if (!delta)
PiuTextEndNode(self, piuTextNodeEndBlockKind);
}
}
}
else {
if (!delta)
PiuTextBeginNode(self, piuTextNodeBeginBlockKind, NULL, NULL);
PiuTextConcat(self, PiuString(xsVar(depth)));
if (!delta)
PiuTextEndNode(self, piuTextNodeEndBlockKind);
}
}
}
void PiuTextCascade(void* it)
{
PiuText* self = it;
PiuApplication* application = (*self)->application;
PiuTextUncomputeStyles(self, application, (*application)->view);
PiuContentCascade(it);
PiuTextComputeStyles(self, application, (*application)->view);
PiuContentInvalidate(self, NULL);
PiuContentReflow(self, piuSizeChanged);
}
void PiuTextComputeStyles(PiuText* self, PiuApplication* application, PiuView* view)
{
xsMachine *the = (*self)->the;
PiuTextBuffer* nodeBuffer = (*self)->nodeBuffer;
PiuTextOffset nodeOffset = sizeof(PiuTextBufferRecord);
PiuTextOffset nodeLimit = (PiuTextOffset)(*nodeBuffer)->current;
PiuStyle* style;
(*self)->flags |= piuTextStyled;
while (nodeOffset < nodeLimit) {
switch (KIND(nodeOffset)) {
case piuTextNodeBeginBlockKind:
case piuTextNodeBeginSpanKind: {
PiuStyleLink* list = (*application)->styleList;
PiuStyleLink* chain = NULL;
PiuTextNodeBegin node = NODE(nodeOffset);
while (node) {
PiuTextOffset parentOffset = node->parentOffset;
style = node->style;
if (style) {
list = PiuStyleLinkMatch(the, list, chain, style);
chain = list;
}
if (parentOffset >= 0)
node = NODE(parentOffset);
else {
PiuContainer* container = (PiuContainer*)self;
while (container) {
style = (*container)->style;
if (style) {
list = PiuStyleLinkMatch(the, list, chain, style);
chain = list;
}
container = (*container)->container;
}
break;
}
}
if (chain) {
style = PiuStyleLinkCompute(the, chain, application);
node = NODE(nodeOffset);
node->computedStyle = style;
#ifdef piuGPU
PiuStyleBind(node->computedStyle, application, view);
#endif
}
else {
(*self)->flags &= ~piuTextStyled;
}
nodeOffset += sizeof(PiuTextNodeBeginRecord);
} break;
case piuTextNodeEndBlockKind:
case piuTextNodeEndSpanKind:
nodeOffset += sizeof(PiuTextNodeEndRecord);
break;
case piuTextNodeStringKind:
nodeOffset += sizeof(PiuTextNodeStringRecord);
break;
}
}
}
void PiuTextConcat(PiuText* self, xsSlot* slot)
{
xsMachine *the = (*self)->the;
PiuTextBuffer* nodeBuffer = (*self)->nodeBuffer;
PiuTextOffset nodeOffset = (PiuTextOffset)(*nodeBuffer)->current;
PiuTextNodeString node;
xsStringValue string = xsToString(*slot);
xsIntegerValue length = c_strlen(string);
PiuTextBufferGrow(the, nodeBuffer, sizeof(PiuTextNodeStringRecord));
node = NODE(nodeOffset);
node->kind = piuTextNodeStringKind;
node->fromOffset = (*self)->textOffset;
node->string = slot;
node->toOffset = node->fromOffset + (PiuTextOffset)length;
(*self)->textOffset = node->toOffset;
}
void PiuTextDictionary(xsMachine* the, void* it)
{
PiuText* self = it;
if (xsFindResult(xsArg(1), xsID_blocks)) {
xsVar(0) = xsResult;
PiuTextBegin(self);
PiuTextBuild(self, 0, 0);
PiuTextEnd(self);
}
else if (xsFindResult(xsArg(1), xsID_string)) {
PiuTextBegin(self);
PiuTextBeginNode(self, piuTextNodeBeginBlockKind, NULL, NULL);
PiuTextConcat(self, PiuString(xsResult));
PiuTextEndNode(self, piuTextNodeEndBlockKind);
PiuTextEnd(self);
}
else if (xsFindResult(xsArg(1), xsID_contents)) {
xsVar(0) = xsResult;
PiuTextBegin(self);
PiuTextBuild(self, 0, 0);
PiuTextEnd(self);
}
}
void PiuTextDraw(void* it, PiuView* view, PiuRectangle area)
{
PiuText* self = it;
xsMachine *the = (*self)->the;
PiuTextBuffer* lineBuffer = (*self)->lineBuffer;
PiuTextOffset lineOffset = sizeof(PiuTextBufferRecord);
PiuTextOffset lineLimit = (PiuTextOffset)(*lineBuffer)->current;
PiuTextBuffer* nodeBuffer = (*self)->nodeBuffer;
PiuTextOffset nodeOffset = sizeof(PiuTextBufferRecord);
PiuTextOffset nodeLimit = (PiuTextOffset)(*nodeBuffer)->current;
PiuStyle* style;
PiuTextOffset fromOffset, toOffset;
PiuCoordinate x, base, y;
xsIntegerValue portion;
xsIntegerValue slop;
xsIntegerValue step;
PiuCoordinate clipTop = area->y;
PiuCoordinate clipBottom = clipTop + area->height;
PiuTextLink* link = NULL;
PiuTextLine previousLine, line = NULL, nextLine = LINE(lineOffset);
xsIntegerValue top, bottom;
PiuContentDraw(it, view, area);
while (lineOffset < lineLimit) {
previousLine = line;
line = nextLine;
lineOffset += sizeof(PiuTextLineRecord);
nextLine = (lineOffset < lineLimit) ? LINE(lineOffset) : NULL;
top = (previousLine) ? previousLine->top : line->top;
bottom = (nextLine) ? nextLine->bottom : line->bottom;
if (top >= clipBottom)
break;
if (bottom <= clipTop)
continue;
fromOffset = line->textOffset;
toOffset = (nextLine) ? nextLine->textOffset : (*self)->textOffset;
base = line->base;
x = line->x;
portion = line->portion;
if (portion) {
slop = 0;
step = line->slop << 16;
step /= portion;
}
else
toOffset += line->slop;
while ((fromOffset < toOffset) && (nodeOffset < nodeLimit)) {
switch (KIND(nodeOffset)) {
case piuTextNodeBeginBlockKind:
case piuTextNodeBeginSpanKind: {
PiuTextNodeBegin nodeBegin = NODE(nodeOffset);
style = nodeBegin->computedStyle;
link = nodeBegin->link;
nodeOffset += sizeof(PiuTextNodeBeginRecord);
} break;
case piuTextNodeEndBlockKind: {
style = NULL;
link = NULL;
nodeOffset += sizeof(PiuTextNodeEndRecord);
} break;
case piuTextNodeEndSpanKind: {
PiuTextNodeEnd nodeEnd = NODE(nodeOffset);
PiuTextNodeBegin nodeBegin = NODE(nodeEnd->parentOffset);
style = nodeBegin->computedStyle;
link = nodeBegin->link;
nodeOffset += sizeof(PiuTextNodeEndRecord);
} break;
case piuTextNodeStringKind: {
PiuTextNodeString node = NODE(nodeOffset);
if ((fromOffset <= node->toOffset) && (node->fromOffset < toOffset)) {
PiuTextOffset fromStringOffset = (fromOffset >= node->fromOffset) ? fromOffset : node->fromOffset;
PiuTextOffset toStringOffset = (toOffset <= node->toOffset) ? toOffset : node->toOffset;
PiuTextOffset offset = fromStringOffset - node->fromOffset;
PiuTextOffset limit = toStringOffset - node->fromOffset;
PiuFont* font = (*style)->font;
PiuColorRecord color;
PiuColorsBlend((*style)->color, link ? (*link)->state : (*self)->state, &color);
PiuViewPushColor(view, &color);
y = base - PiuFontGetAscent(font);
if (portion) {
PiuTextOffset previousOffset = offset, nextOffset;
for (;;) {
PiuTextKind kind = PiuTextAdvance(the, node->string, offset, limit, &nextOffset);
if (kind) {
PiuTextOffset length = offset - previousOffset;
if (length) {
PiuViewDrawString(view, node->string, previousOffset, length, font, x, y, 0, 0);
x += PiuFontGetWidth(font, node->string, previousOffset, length);
previousOffset = offset;
}
if (kind == piuTextEnd) break;
if (kind == piuTextSpace) {
slop += step;
x += (slop & 0xFFFF0000) >> 16;
slop = slop & 0x0000FFFF;
previousOffset = nextOffset;
}
}
offset = nextOffset;
}
}
else {
PiuTextOffset length = limit - offset;
if (length) {
PiuViewDrawString(view, node->string, offset, length, font, x, y, 0, 0);
x += PiuFontGetWidth(font, node->string, offset, length);
}
}
fromOffset = toStringOffset;
PiuViewPopColor(view);
}
if (fromOffset < toOffset)
nodeOffset += sizeof(PiuTextNodeStringRecord);
} break;
}
}
}
}
void PiuTextEnd(PiuText* self)
{
PiuApplication* application = (*self)->application;
if (application)
PiuTextComputeStyles(self, application, (*application)->view);
PiuContentReflow(self, piuSizeChanged);
}
void PiuTextEndNode(PiuText* self, PiuTextKind kind)
{
xsMachine *the = (*self)->the;
PiuTextBuffer* nodeBuffer = (*self)->nodeBuffer;
PiuTextOffset nodeOffset = (PiuTextOffset)(*nodeBuffer)->current;
PiuTextNodeBegin nodeBegin;
PiuTextNodeEnd nodeEnd;
PiuTextBufferGrow(the, nodeBuffer, sizeof(PiuTextNodeEndRecord));
nodeBegin = NODE((*self)->nodeOffset);
(*self)->nodeOffset = nodeBegin->parentOffset;
(*self)->nodeLink = nodeBegin->link;
nodeEnd = NODE(nodeOffset);
nodeEnd->kind = kind;
nodeEnd->parentOffset = (kind == piuTextNodeEndSpanKind) ? (*self)->nodeOffset : (*self)->textOffset;
}
void PiuTextFitHorizontally(void* it)
{
PiuText* self = it;
if (((*self)->coordinates.horizontal & piuLeftRight) != piuLeftRight)
(*self)->bounds.width = (*self)->coordinates.width;
(*self)->textWidth = (*self)->bounds.width;
(*self)->textHeight = 0;
if (((*self)->textWidth) && ((*self)->flags & piuTextStyled))
PiuTextFormat(self);
(*self)->flags &= ~(piuWidthChanged | piuContentsHorizontallyChanged);
if (!((*self)->coordinates.vertical & piuHeight)) {
PiuContentReflow(self, piuHeightChanged);
}
}
void PiuTextFormat(PiuText* self)
{
xsMachine *the = (*self)->the;
PiuTextBuffer* nodeBuffer = (*self)->nodeBuffer;
PiuTextOffset nodeOffset = sizeof(PiuTextBufferRecord);
PiuTextOffset nodeLimit = (PiuTextOffset)(*nodeBuffer)->current;
PiuTextFormatContextRecord _ctx;
PiuTextFormatContext ctx = &_ctx;
PiuCoordinate marginTop;
PiuCoordinate marginBottom = 0;
c_memset(ctx, 0, sizeof(PiuTextFormatContextRecord));
PiuTextBufferClear(the, (*self)->lineBuffer);
while (nodeOffset < nodeLimit) {
switch (KIND(nodeOffset)) {
case piuTextNodeBeginBlockKind: {
PiuTextNodeBegin nodeBegin = NODE(nodeOffset);
ctx->blockStyle = ctx->spanStyle = nodeBegin->computedStyle;
ctx->blockWidth = (*self)->textWidth - (*ctx->blockStyle)->margins.left - (*ctx->blockStyle)->margins.right;
marginTop = (*ctx->blockStyle)->margins.top;
ctx->y += (marginTop > marginBottom) ? marginTop : marginBottom;
nodeOffset += sizeof(PiuTextNodeBeginRecord);
} break;
case piuTextNodeBeginSpanKind: {
PiuTextNodeBegin nodeBegin = NODE(nodeOffset);
ctx->spanStyle = nodeBegin->computedStyle;
nodeOffset += sizeof(PiuTextNodeBeginRecord);
} break;
case piuTextNodeEndBlockKind: {
PiuTextNodeEnd nodeEnd = NODE(nodeOffset);
PiuTextFormatBlock(self, ctx, piuTextReturn, 0, nodeEnd->parentOffset);
marginBottom = (*ctx->blockStyle)->margins.bottom;
ctx->blockStyle = ctx->spanStyle = NULL;
nodeOffset += sizeof(PiuTextNodeEndRecord);
} break;
case piuTextNodeEndSpanKind: {
PiuTextNodeEnd nodeEnd = NODE(nodeOffset);
PiuTextNodeBegin nodeBegin = NODE(nodeEnd->parentOffset);
ctx->spanStyle = nodeBegin->computedStyle;
nodeOffset += sizeof(PiuTextNodeEndRecord);
} break;
case piuTextNodeStringKind: {
PiuTextNodeString node = NODE(nodeOffset);
PiuTextOffset previousOffset = 0, offset = 0, nextOffset, textOffset = node->fromOffset;
PiuFont* spanFont = (*ctx->spanStyle)->font;
PiuCoordinate spanAscent = PiuFontGetAscent(spanFont);
PiuCoordinate spanHeight = PiuFontGetHeight(spanFont);
for (;;) {
PiuTextKind kind = PiuTextAdvance(the, node->string, offset, 0x7fff, &nextOffset);
if (kind) {
PiuTextOffset length = offset - previousOffset;
if (length) {
ctx->wordWidth += PiuFontGetWidth(spanFont, node->string, previousOffset, length);
if (ctx->wordAscent < spanAscent)
ctx->wordAscent = spanAscent;
if (ctx->wordHeight < spanHeight)
ctx->wordHeight = spanHeight;
previousOffset = offset;
}
length = nextOffset - previousOffset;
if (kind == piuTextSpace) {
PiuTextFormatBlock(self, ctx, kind, length, textOffset + nextOffset);
node = NODE(nodeOffset);
if (length) {
ctx->spaceWidth = PiuFontGetWidth(spanFont, node->string, previousOffset, length);
previousOffset = nextOffset;
}
}
else if (kind == piuTextReturn) {
PiuTextFormatBlock(self, ctx, kind, length, textOffset + nextOffset);
node = NODE(nodeOffset);
if (length) {
previousOffset = nextOffset;
}
}
else if (kind == piuTextWordBreak) {
PiuTextFormatBlock(self, ctx, kind, 0, textOffset + previousOffset);
node = NODE(nodeOffset);
if (length) {
ctx->wordWidth = PiuFontGetWidth(spanFont, node->string, previousOffset, length);
if (ctx->wordAscent < spanAscent)
ctx->wordAscent = spanAscent;
if (ctx->wordHeight < spanHeight)
ctx->wordHeight = spanHeight;
previousOffset = nextOffset;
}
}
else
break;
}
offset = nextOffset;
}
nodeOffset += sizeof(PiuTextNodeStringRecord);
} break;
}
}
ctx->y += marginBottom;
(*self)->textHeight = ctx->y;
}
void PiuTextFormatBlock(PiuText* self, PiuTextFormatContext ctx, PiuTextKind kind, PiuTextOffset length, PiuTextOffset textOffset)
{
if (ctx->lineWidth + ctx->spaceWidth + ctx->wordWidth > ctx->blockWidth) {
if (ctx->lineWidth > 0)
PiuTextFormatLine(self, ctx, piuTextWord, 0);
ctx->spaceCount = 0;
ctx->spaceSum = 0;
ctx->lineOffset = ctx->wordOffset;
ctx->lineWidth = ctx->wordWidth;
ctx->lineAscent = ctx->wordAscent;
ctx->lineHeight = ctx->wordHeight;
}
else {
if (ctx->lineWidth > 0) {
ctx->spaceCount++;
ctx->spaceSum += ctx->spaceWidth;
}
ctx->lineWidth += ctx->spaceWidth + ctx->wordWidth;
if (ctx->lineAscent < ctx->wordAscent)
ctx->lineAscent = ctx->wordAscent;
if (ctx->lineHeight < ctx->wordHeight)
ctx->lineHeight = ctx->wordHeight;
}
if ((kind == piuTextReturn) || (ctx->lineWidth > ctx->blockWidth)) { // @@ no cesure
ctx->spaceCount = 0;
ctx->spaceSum = 0;
PiuTextFormatLine(self, ctx, kind, length);
ctx->lineOffset = textOffset;
ctx->lineWidth = 0;
ctx->lineAscent = 0;
ctx->lineHeight = 0;
}
ctx->spaceWidth = 0;
ctx->wordOffset = textOffset;
ctx->wordWidth = 0;
ctx->wordAscent = 0;
ctx->wordHeight = 0;
}
void PiuTextFormatLine(PiuText* self, PiuTextFormatContext ctx, PiuTextKind kind, PiuTextOffset length)
{
xsMachine *the = (*self)->the;
PiuTextBuffer* lineBuffer = (*self)->lineBuffer;
PiuTextOffset lineOffset = (PiuTextOffset)(*lineBuffer)->current;
PiuTextLine line;
PiuCoordinate x = (*ctx->blockStyle)->margins.left;
xsIntegerValue leading = (*ctx->blockStyle)->leading;
xsIntegerValue ascent, height;
PiuTextBufferGrow(the, lineBuffer, sizeof(PiuTextLineRecord));
line = LINE(lineOffset);
line->textOffset = ctx->lineOffset;
switch ((*ctx->blockStyle)->horizontal) {
case piuCenter:
#ifdef piuPC
line->x = x + ((ctx->blockWidth - ctx->lineWidth) / 2);
#else
line->x = x + ((ctx->blockWidth - ctx->lineWidth) >> 1);
#endif
line->portion = line->slop = 0;
break;
case piuLeft:
line->x = x;
line->portion = line->slop = 0;
break;
case piuRight:
line->x = x + ctx->blockWidth - ctx->lineWidth;
line->portion = line->slop = 0;
break;
default:
line->x = x;
line->portion = ctx->spaceCount;
line->slop = ctx->blockWidth - (ctx->lineWidth - ctx->spaceSum);
break;
}
if (kind == piuTextReturn) {
line->portion = 0;
line->slop = -length;
}
ascent = ctx->lineAscent;
height = ctx->lineHeight;
if (leading < 0) {
leading = -leading;
ascent = (ascent * leading) / 100;
height = (height * leading) / 100;
}
else if (leading > 0) {
if (0 < height && height < leading) {
ascent = (ascent * leading) / height;
height = leading;
}
}
line->top = ctx->y + (PiuCoordinate)ascent - ctx->lineAscent;
line->base = ctx->y + (PiuCoordinate)ascent;
line->bottom = line->top + ctx->lineHeight;
ctx->y += (PiuCoordinate)height;
}
void* PiuTextHit(void* it, PiuCoordinate x, PiuCoordinate y)
{
PiuText* self = it;
xsMachine *the = (*self)->the;
PiuTextBuffer* lineBuffer = (*self)->lineBuffer;
PiuTextOffset lineOffset = sizeof(PiuTextBufferRecord);
PiuTextOffset lineLimit = (PiuTextOffset)(*lineBuffer)->current;
PiuTextBuffer* nodeBuffer = (*self)->nodeBuffer;
PiuTextOffset nodeOffset = sizeof(PiuTextBufferRecord);
PiuTextOffset nodeLimit = (PiuTextOffset)(*nodeBuffer)->current;
PiuStyle* style;
PiuTextOffset fromOffset, toOffset;
xsIntegerValue portion;
xsIntegerValue slop;
xsIntegerValue step;
PiuCoordinate lineLeft = 0;
PiuCoordinate lineRight = 0;
PiuTextLine line = NULL, nextLine = LINE(lineOffset);
void* link = NULL;
if (!((*self)->flags & piuActive))
return NULL;
if ((x < 0) || (y < 0) || (x >= (*self)->bounds.width) || (y >= (*self)->bounds.height))
return NULL;
while (lineOffset < lineLimit) {
line = nextLine;
lineOffset += sizeof(PiuTextLineRecord);
nextLine = (lineOffset < lineLimit) ? LINE(lineOffset) : NULL;
if (y < line->top)
break;
if (line->bottom < y)
continue;
fromOffset = line->textOffset;
toOffset = (nextLine) ? nextLine->textOffset : (*self)->textOffset;
lineLeft = line->x;
portion = line->portion;
if (portion) {
slop = 0;
step = line->slop << 16;
step /= portion;
}
while ((fromOffset < toOffset) && (nodeOffset < nodeLimit)) {
switch (KIND(nodeOffset)) {
case piuTextNodeBeginBlockKind:
case piuTextNodeBeginSpanKind: {
PiuTextNodeBegin nodeBegin = NODE(nodeOffset);
style = nodeBegin->computedStyle;
link = nodeBegin->link;
nodeOffset += sizeof(PiuTextNodeBeginRecord);
} break;
case piuTextNodeEndBlockKind: {
style = NULL;
link = NULL;
nodeOffset += sizeof(PiuTextNodeEndRecord);
} break;
case piuTextNodeEndSpanKind: {
PiuTextNodeEnd nodeEnd = NODE(nodeOffset);
PiuTextNodeBegin nodeBegin = NODE(nodeEnd->parentOffset);
style = nodeBegin->computedStyle;
link = nodeBegin->link;
nodeOffset += sizeof(PiuTextNodeEndRecord);
} break;
case piuTextNodeStringKind: {
PiuTextNodeString node = NODE(nodeOffset);
if ((fromOffset <= node->toOffset) && (node->fromOffset < toOffset)) {
PiuTextOffset fromStringOffset = (fromOffset >= node->fromOffset) ? fromOffset : node->fromOffset;
PiuTextOffset toStringOffset = (toOffset <= node->toOffset) ? toOffset : node->toOffset;
PiuTextOffset offset = fromStringOffset - node->fromOffset;
PiuTextOffset limit = toStringOffset - node->fromOffset;
PiuFont* font = (*style)->font;
if (portion) {
PiuTextOffset previousOffset = offset, nextOffset;
for (;;) {
PiuTextKind kind = PiuTextAdvance(the, node->string, offset, limit, &nextOffset);
if (kind) {
PiuTextOffset length = offset - previousOffset;
if (length) {
lineRight = lineLeft + PiuFontGetWidth(font, node->string, previousOffset, length);
if ((lineLeft <= x) && (x < lineRight))
return link ? link : self;
lineLeft = lineRight;
previousOffset = offset;
}
if (kind == piuTextEnd) break;
if (kind == piuTextSpace) {
slop += step;
lineLeft += (slop & 0xFFFF0000) >> 16;
slop = slop & 0x0000FFFF;
previousOffset = nextOffset;
}
}
offset = nextOffset;