WebKit/android/RenderSkinCombo.cpp - platform/external/webkit - Git at Google

 /*
  * Copyright 2006, The Android Open Source Project
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *  * Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  *  * Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #include "config.h"
 #include "RenderSkinCombo.h"

 #include "CString.h"
 #include "Document.h"
 #include "Element.h"
 #include "Node.h"
 #include "NodeRenderStyle.h"
 #include "RenderStyle.h"
 #include "SkCanvas.h"
 #include "SkNinePatch.h"

 namespace WebCore {

 // Indicates if the entire asset is being drawn, or if the border is being
 // excluded and just the arrow drawn.
 enum BorderStyle {
     FullAsset,
     NoBorder
 };

 // There are 2.5 different concepts of a 'border' here, which results
 // in rather a lot of magic constants. In each case, there are 2
 // numbers, one for medium res and one for high-res. All sizes are in pixels.

 // Firstly, we have the extra padding that webkit needs to know about,
 // which defines how much bigger this element is made by the
 // asset. This is actually a bit broader than the actual border on the
 // asset, to make things look less cramped. The border is the same
 // width on all sides, except on the right when it's significantly
 // wider to allow for the arrow.
 const int RenderSkinCombo::arrowMargin[2] = {22, 34};
 const int RenderSkinCombo::padMargin[2] = {2, 5};

 // Then we have the borders used for the 9-patch stretch. The
 // rectangle at the centre of these borders is entirely below and to
 // the left of the arrow in the asset. Hence the border widths are the
 // same for the bottom and left, but are different for the top. The
 // right hand border width happens to be the same as arrowMargin
 // defined above.
 static const int        stretchMargin[2] = {3, 5};   // border width for the bottom and left of the 9-patch
 static const int        stretchTop[2] = {15, 23};     // border width for the top of the 9-patch

 // Finally, if the border is defined by the CSS, we only draw the
 // arrow and not the border. We do this by drawing the relevant subset
 // of the bitmap, which must now be precisely determined by what's in
 // the asset with no extra padding to make things look properly
 // spaced. The border to remove at the top, right and bottom of the
 // image is the same as stretchMargin above, but we need to know the width
 // of the arrow.
 static const int arrowWidth[2] = {22, 31};

 RenderSkinCombo::Resolution RenderSkinCombo::resolution = MedRes;

 const SkIRect RenderSkinCombo::margin[2][2] = {{{ stretchMargin[MedRes], stretchTop[MedRes],
                                           RenderSkinCombo::arrowMargin[MedRes] + stretchMargin[MedRes], stretchMargin[MedRes] },
                                         {0, stretchTop[MedRes], 0, stretchMargin[MedRes]}},
                                        {{ stretchMargin[HighRes], stretchTop[HighRes],
                                           RenderSkinCombo::arrowMargin[HighRes] + stretchMargin[HighRes], stretchMargin[HighRes] },
                                         {0, stretchTop[HighRes], 0, stretchMargin[HighRes]}}};
 static SkBitmap         bitmaps[2][2]; // Collection of assets for a combo box
 static bool             isDecoded;      // True if all assets were decoded

 void RenderSkinCombo::Init(android::AssetManager* am, String drawableDirectory)
 {
     if (isDecoded)
         return;

     if (drawableDirectory[drawableDirectory.length() - 5] == 'h')
         resolution = HighRes;

     isDecoded = RenderSkinAndroid::DecodeBitmap(am, (drawableDirectory + "combobox_nohighlight.png").utf8().data(), &bitmaps[kNormal][FullAsset]);
     isDecoded &= RenderSkinAndroid::DecodeBitmap(am, (drawableDirectory + "combobox_disabled.png").utf8().data(), &bitmaps[kDisabled][FullAsset]);

     int width = bitmaps[kNormal][FullAsset].width();
     int height = bitmaps[kNormal][FullAsset].height();
     SkIRect  subset;
     subset.set(width - arrowWidth[resolution], 0, width, height);
     bitmaps[kNormal][FullAsset].extractSubset(&bitmaps[kNormal][NoBorder], subset);
     bitmaps[kDisabled][FullAsset].extractSubset(&bitmaps[kDisabled][NoBorder], subset);
 }


 bool RenderSkinCombo::Draw(SkCanvas* canvas, Node* element, int x, int y, int width, int height)
 {
     if (!isDecoded)
         return true;

     State state = (element->isElementNode() && static_cast<Element*>(element)->isEnabledFormControl()) ? kNormal : kDisabled;
     height = std::max(height, (stretchMargin[resolution]<<1) + 1);

     SkRect bounds;
     BorderStyle drawBorder = FullAsset;

     bounds.set(SkIntToScalar(x+1), SkIntToScalar(y+1), SkIntToScalar(x + width-1), SkIntToScalar(y + height-1));
     RenderStyle* style = element->renderStyle();
     SkPaint paint;
     paint.setColor(style->backgroundColor().rgb());
     canvas->drawRect(bounds, paint);

     bounds.set(SkIntToScalar(x), SkIntToScalar(y), SkIntToScalar(x + width), SkIntToScalar(y + height));

     if (style->borderLeftColor().isValid() ||
         style->borderRightColor().isValid() ||
         style->borderTopColor().isValid() ||
         style->borderBottomColor().isValid()) {
         bounds.fLeft += SkIntToScalar(width - RenderSkinCombo::extraWidth());
         bounds.fRight -= SkIntToScalar(style->borderRightWidth());
         bounds.fTop += SkIntToScalar(style->borderTopWidth());
         bounds.fBottom -= SkIntToScalar(style->borderBottomWidth());
         drawBorder = NoBorder;
     }
     SkNinePatch::DrawNine(canvas, bounds, bitmaps[state][drawBorder], margin[resolution][drawBorder]);
     return false;
 }

 }   //WebCore
	/*
	* Copyright 2006, The Android Open Source Project
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* * Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* * Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS ``AS IS'' AND ANY
	* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
	* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
	* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
	* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
	* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
	* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#include "config.h"
	#include "RenderSkinCombo.h"

	#include "CString.h"
	#include "Document.h"
	#include "Element.h"
	#include "Node.h"
	#include "NodeRenderStyle.h"
	#include "RenderStyle.h"
	#include "SkCanvas.h"
	#include "SkNinePatch.h"

	namespace WebCore {

	// Indicates if the entire asset is being drawn, or if the border is being
	// excluded and just the arrow drawn.
	enum BorderStyle {
	FullAsset,
	NoBorder
	};

	// There are 2.5 different concepts of a 'border' here, which results
	// in rather a lot of magic constants. In each case, there are 2
	// numbers, one for medium res and one for high-res. All sizes are in pixels.

	// Firstly, we have the extra padding that webkit needs to know about,
	// which defines how much bigger this element is made by the
	// asset. This is actually a bit broader than the actual border on the
	// asset, to make things look less cramped. The border is the same
	// width on all sides, except on the right when it's significantly
	// wider to allow for the arrow.
	const int RenderSkinCombo::arrowMargin[2] = {22, 34};
	const int RenderSkinCombo::padMargin[2] = {2, 5};

	// Then we have the borders used for the 9-patch stretch. The
	// rectangle at the centre of these borders is entirely below and to
	// the left of the arrow in the asset. Hence the border widths are the
	// same for the bottom and left, but are different for the top. The
	// right hand border width happens to be the same as arrowMargin
	// defined above.
	static const int stretchMargin[2] = {3, 5}; // border width for the bottom and left of the 9-patch
	static const int stretchTop[2] = {15, 23}; // border width for the top of the 9-patch

	// Finally, if the border is defined by the CSS, we only draw the
	// arrow and not the border. We do this by drawing the relevant subset
	// of the bitmap, which must now be precisely determined by what's in
	// the asset with no extra padding to make things look properly
	// spaced. The border to remove at the top, right and bottom of the
	// image is the same as stretchMargin above, but we need to know the width
	// of the arrow.
	static const int arrowWidth[2] = {22, 31};

	RenderSkinCombo::Resolution RenderSkinCombo::resolution = MedRes;

	const SkIRect RenderSkinCombo::margin[2][2] = {{{ stretchMargin[MedRes], stretchTop[MedRes],
	RenderSkinCombo::arrowMargin[MedRes] + stretchMargin[MedRes], stretchMargin[MedRes] },
	{0, stretchTop[MedRes], 0, stretchMargin[MedRes]}},
	{{ stretchMargin[HighRes], stretchTop[HighRes],
	RenderSkinCombo::arrowMargin[HighRes] + stretchMargin[HighRes], stretchMargin[HighRes] },
	{0, stretchTop[HighRes], 0, stretchMargin[HighRes]}}};
	static SkBitmap bitmaps[2][2]; // Collection of assets for a combo box
	static bool isDecoded; // True if all assets were decoded

	void RenderSkinCombo::Init(android::AssetManager* am, String drawableDirectory)
	{
	if (isDecoded)
	return;

	if (drawableDirectory[drawableDirectory.length() - 5] == 'h')
	resolution = HighRes;

	isDecoded = RenderSkinAndroid::DecodeBitmap(am, (drawableDirectory + "combobox_nohighlight.png").utf8().data(), &bitmaps[kNormal][FullAsset]);
	isDecoded &= RenderSkinAndroid::DecodeBitmap(am, (drawableDirectory + "combobox_disabled.png").utf8().data(), &bitmaps[kDisabled][FullAsset]);

	int width = bitmaps[kNormal][FullAsset].width();
	int height = bitmaps[kNormal][FullAsset].height();
	SkIRect subset;
	subset.set(width - arrowWidth[resolution], 0, width, height);
	bitmaps[kNormal][FullAsset].extractSubset(&bitmaps[kNormal][NoBorder], subset);
	bitmaps[kDisabled][FullAsset].extractSubset(&bitmaps[kDisabled][NoBorder], subset);
	}


	bool RenderSkinCombo::Draw(SkCanvas* canvas, Node* element, int x, int y, int width, int height)
	{
	if (!isDecoded)
	return true;

	State state = (element->isElementNode() && static_cast<Element*>(element)->isEnabledFormControl()) ? kNormal : kDisabled;
	height = std::max(height, (stretchMargin[resolution]<<1) + 1);

	SkRect bounds;
	BorderStyle drawBorder = FullAsset;

	bounds.set(SkIntToScalar(x+1), SkIntToScalar(y+1), SkIntToScalar(x + width-1), SkIntToScalar(y + height-1));
	RenderStyle* style = element->renderStyle();
	SkPaint paint;
	paint.setColor(style->backgroundColor().rgb());
	canvas->drawRect(bounds, paint);

	bounds.set(SkIntToScalar(x), SkIntToScalar(y), SkIntToScalar(x + width), SkIntToScalar(y + height));

	if (style->borderLeftColor().isValid() \|\|
	style->borderRightColor().isValid() \|\|
	style->borderTopColor().isValid() \|\|
	style->borderBottomColor().isValid()) {
	bounds.fLeft += SkIntToScalar(width - RenderSkinCombo::extraWidth());
	bounds.fRight -= SkIntToScalar(style->borderRightWidth());
	bounds.fTop += SkIntToScalar(style->borderTopWidth());
	bounds.fBottom -= SkIntToScalar(style->borderBottomWidth());
	drawBorder = NoBorder;
	}
	SkNinePatch::DrawNine(canvas, bounds, bitmaps[state][drawBorder], margin[resolution][drawBorder]);
	return false;
	}

	} //WebCore