move SkTextBox into utils

src/views/SkTextBox.cpp

Index: src/views/SkTextBox.cpp
diff --git a/src/views/SkTextBox.cpp b/src/views/SkTextBox.cpp
deleted file mode 100644
index 55d75a64dac74e1f3e3f5aa5005ef9ab69be31ec..0000000000000000000000000000000000000000
--- a/src/views/SkTextBox.cpp
+++ /dev/null
@@ -1,259 +0,0 @@
-/*
- * Copyright 2006 The Android Open Source Project
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkTextBox.h"
-#include "SkUtils.h"
-
-static inline int is_ws(int c)
-{
-    return !((c - 1) >> 5);
-}
-
-static size_t linebreak(const char text[], const char stop[],
-                        const SkPaint& paint, SkScalar margin,
-                        size_t* trailing = NULL)
-{
-    size_t lengthBreak = paint.breakText(text, stop - text, margin);
-
-    //Check for white space or line breakers before the lengthBreak
-    const char* start = text;
-    const char* word_start = text;
-    int prevWS = true;
-    if (trailing) {
-        *trailing = 0;
-    }
-
-    while (text < stop) {
-        const char* prevText = text;
-        SkUnichar uni = SkUTF8_NextUnichar(&text);
-        int currWS = is_ws(uni);
-
-        if (!currWS && prevWS) {
-            word_start = prevText;
-        }
-        prevWS = currWS;
-
-        if (text > start + lengthBreak) {
-            if (currWS) {
-                // eat the rest of the whitespace
-                while (text < stop && is_ws(SkUTF8_ToUnichar(text))) {
-                    text += SkUTF8_CountUTF8Bytes(text);
-                }
-                if (trailing) {
-                    *trailing = text - prevText;
-                }
-            } else {
-                // backup until a whitespace (or 1 char)
-                if (word_start == start) {
-                    if (prevText > start) {
-                        text = prevText;
-                    }
-                } else {
-                    text = word_start;
-                }
-            }
-            break;
-        }
-
-        if ('\n' == uni) {
-            size_t ret = text - start;
-            size_t lineBreakSize = 1;
-            if (text < stop) {
-                uni = SkUTF8_NextUnichar(&text);
-                if ('\r' == uni) {
-                    ret = text - start;
-                    ++lineBreakSize;
-                }
-            }
-            if (trailing) {
-                *trailing = lineBreakSize;
-            }
-            return ret;
-        }
-
-        if ('\r' == uni) {
-            size_t ret = text - start;
-            size_t lineBreakSize = 1;
-            if (text < stop) {
-                uni = SkUTF8_NextUnichar(&text);
-                if ('\n' == uni) {
-                    ret = text - start;
-                    ++lineBreakSize;
-                }
-            }
-            if (trailing) {
-                *trailing = lineBreakSize;
-            }
-            return ret;
-        }
-    }
-
-    return text - start;
-}
-
-int SkTextLineBreaker::CountLines(const char text[], size_t len, const SkPaint& paint, SkScalar width)
-{
-    const char* stop = text + len;
-    int         count = 0;
-
-    if (width > 0)
-    {
-        do {
-            count += 1;
-            text += linebreak(text, stop, paint, width);
-        } while (text < stop);
-    }
-    return count;
-}
-
-//////////////////////////////////////////////////////////////////////////////
-
-SkTextBox::SkTextBox()
-{
-    fBox.setEmpty();
-    fSpacingMul = SK_Scalar1;
-    fSpacingAdd = 0;
-    fMode = kLineBreak_Mode;
-    fSpacingAlign = kStart_SpacingAlign;
-}
-
-void SkTextBox::setMode(Mode mode)
-{
-    SkASSERT((unsigned)mode < kModeCount);
-    fMode = SkToU8(mode);
-}
-
-void SkTextBox::setSpacingAlign(SpacingAlign align)
-{
-    SkASSERT((unsigned)align < kSpacingAlignCount);
-    fSpacingAlign = SkToU8(align);
-}
-
-void SkTextBox::getBox(SkRect* box) const
-{
-    if (box)
-        *box = fBox;
-}
-
-void SkTextBox::setBox(const SkRect& box)
-{
-    fBox = box;
-}
-
-void SkTextBox::setBox(SkScalar left, SkScalar top, SkScalar right, SkScalar bottom)
-{
-    fBox.set(left, top, right, bottom);
-}
-
-void SkTextBox::getSpacing(SkScalar* mul, SkScalar* add) const
-{
-    if (mul)
-        *mul = fSpacingMul;
-    if (add)
-        *add = fSpacingAdd;
-}
-
-void SkTextBox::setSpacing(SkScalar mul, SkScalar add)
-{
-    fSpacingMul = mul;
-    fSpacingAdd = add;
-}
-
-/////////////////////////////////////////////////////////////////////////////////////////////
-
-void SkTextBox::draw(SkCanvas* canvas, const char text[], size_t len, const SkPaint& paint)
-{
-    SkASSERT(canvas && (text || len == 0));
-
-    SkScalar marginWidth = fBox.width();
-
-    if (marginWidth <= 0 || len == 0)
-        return;
-
-    const char* textStop = text + len;
-
-    SkScalar                x, y, scaledSpacing, height, fontHeight;
-    SkPaint::FontMetrics    metrics;
-
-    switch (paint.getTextAlign()) {
-    case SkPaint::kLeft_Align:
-        x = 0;
-        break;
-    case SkPaint::kCenter_Align:
-        x = SkScalarHalf(marginWidth);
-        break;
-    default:
-        x = marginWidth;
-        break;
-    }
-    x += fBox.fLeft;
-
-    fontHeight = paint.getFontMetrics(&metrics);
-    scaledSpacing = SkScalarMul(fontHeight, fSpacingMul) + fSpacingAdd;
-    height = fBox.height();
-
-    //  compute Y position for first line
-    {
-        SkScalar textHeight = fontHeight;
-
-        if (fMode == kLineBreak_Mode && fSpacingAlign != kStart_SpacingAlign)
-        {
-            int count = SkTextLineBreaker::CountLines(text, textStop - text, paint, marginWidth);
-            SkASSERT(count > 0);
-            textHeight += scaledSpacing * (count - 1);
-        }
-
-        switch (fSpacingAlign) {
-        case kStart_SpacingAlign:
-            y = 0;
-            break;
-        case kCenter_SpacingAlign:
-            y = SkScalarHalf(height - textHeight);
-            break;
-        default:
-            SkASSERT(fSpacingAlign == kEnd_SpacingAlign);
-            y = height - textHeight;
-            break;
-        }
-        y += fBox.fTop - metrics.fAscent;
-    }
-
-    for (;;)
-    {
-        size_t trailing;
-        len = linebreak(text, textStop, paint, marginWidth, &trailing);
-        if (y + metrics.fDescent + metrics.fLeading > 0)
-            canvas->drawText(text, len - trailing, x, y, paint);
-        text += len;
-        if (text >= textStop)
-            break;
-        y += scaledSpacing;
-        if (y + metrics.fAscent >= fBox.fBottom)
-            break;
-    }
-}
-
-///////////////////////////////////////////////////////////////////////////////
-
-void SkTextBox::setText(const char text[], size_t len, const SkPaint& paint) {
-    fText = text;
-    fLen = len;
-    fPaint = &paint;
-}
-
-void SkTextBox::draw(SkCanvas* canvas) {
-    this->draw(canvas, fText, fLen, *fPaint);
-}
-
-int SkTextBox::countLines() const {
-    return SkTextLineBreaker::CountLines(fText, fLen, *fPaint, fBox.width());
-}
-
-SkScalar SkTextBox::getTextHeight() const {
-    SkScalar spacing = SkScalarMul(fPaint->getTextSize(), fSpacingMul) + fSpacingAdd;
-    return this->countLines() * spacing;
-}