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/*
* This source file is part of libRocket, the HTML/CSS Interface Middleware
*
* For the latest information, see http://www.librocket.com
*
* Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#include "precompiled.h"
#include "LayoutInlineBoxText.h"
#include "FontFaceHandle.h"
#include "LayoutEngine.h"
#include "LayoutLineBox.h"
#include "../../Include/Rocket/Core/ElementText.h"
#include "../../Include/Rocket/Core/ElementUtilities.h"
#include "../../Include/Rocket/Core/Log.h"
#include "../../Include/Rocket/Core/Property.h"
namespace Rocket {
namespace Core {
LayoutInlineBoxText::LayoutInlineBoxText(Element* element, int _line_begin) : LayoutInlineBox(element, Box())
{
line_begin = _line_begin;
// Build the box to represent the dimensions of the first word.
BuildWordBox();
}
LayoutInlineBoxText::~LayoutInlineBoxText()
{
}
// Returns true if this box is capable of overflowing, or if it must be rendered on a single line.
bool LayoutInlineBoxText::CanOverflow() const
{
return line_segmented;
}
// Flows the inline box's content into its parent line.
LayoutInlineBox* LayoutInlineBoxText::FlowContent(bool first_box, float available_width, float right_spacing_width)
{
ElementText* text_element = GetTextElement();
ROCKET_ASSERT(text_element != NULL);
int line_length;
float line_width;
bool overflow = !text_element->GenerateLine(line_contents, line_length, line_width, line_begin, available_width, right_spacing_width, first_box);
Vector2f content_area;
content_area.x = line_width;
content_area.y = box.GetSize().y;
box.SetContent(content_area);
// Call the base-class's FlowContent() to increment the width of our parent's box.
LayoutInlineBox::FlowContent(first_box, available_width, right_spacing_width);
if (overflow)
return new LayoutInlineBoxText(element, line_begin + line_length);
return NULL;
}
// Computes and sets the vertical position of this element, relative to its parent inline box (or block box, for an un-nested inline box).
void LayoutInlineBoxText::CalculateBaseline(float& ascender, float& descender)
{
ascender = height - baseline;
descender = height - ascender;
}
// Offsets the baseline of this box, and all of its children, by the ascender of the parent line box.
void LayoutInlineBoxText::OffsetBaseline(float ascender)
{
// Offset by the ascender.
position.y += (ascender - (height - baseline));
// Calculate the leading (the difference between font height and line height).
float leading = 0;
FontFaceHandle* font_face_handle = element->GetFontFaceHandle();
if (font_face_handle != NULL)
leading = height - font_face_handle->GetLineHeight();
// Offset by the half-leading.
position.y += leading * 0.5f;
position.y = LayoutEngine::Round(position.y);
}
// Positions the inline box's element.
void LayoutInlineBoxText::PositionElement()
{
if (line_begin == 0)
{
LayoutInlineBox::PositionElement();
GetTextElement()->ClearLines();
GetTextElement()->AddLine(Vector2f(0, 0), line_contents);
}
else
{
GetTextElement()->AddLine(line->GetRelativePosition() + position - element->GetRelativeOffset(Box::BORDER), line_contents);
}
}
// Sizes the inline box's element.
void LayoutInlineBoxText::SizeElement(bool ROCKET_UNUSED_PARAMETER(split))
{
ROCKET_UNUSED(split);
}
void* LayoutInlineBoxText::operator new(size_t size)
{
return LayoutEngine::AllocateLayoutChunk(size);
}
void LayoutInlineBoxText::operator delete(void* chunk)
{
LayoutEngine::DeallocateLayoutChunk(chunk);
}
// Returns the box's element as a text element.
ElementText* LayoutInlineBoxText::GetTextElement()
{
return dynamic_cast< ElementText* >(element);
}
// Builds a box for the first word of the element.
void LayoutInlineBoxText::BuildWordBox()
{
ElementText* text_element = GetTextElement();
ROCKET_ASSERT(text_element != NULL);
FontFaceHandle* font_face_handle = text_element->GetFontFaceHandle();
if (font_face_handle == NULL)
{
height = 0;
baseline = 0;
Log::Message(Log::LT_WARNING, "No font face defined on element %s. Please specify a font-family in your RCSS.", text_element->GetAddress().CString());
return;
}
Vector2f content_area;
line_segmented = !text_element->GenerateToken(content_area.x, line_begin);
content_area.y = (float) ElementUtilities::GetLineHeight(element);
box.SetContent(content_area);
}
}
}
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