diff options
Diffstat (limited to 'guilib/GUITextLayout.cpp')
| -rw-r--r-- | guilib/GUITextLayout.cpp | 628 |
1 files changed, 0 insertions, 628 deletions
diff --git a/guilib/GUITextLayout.cpp b/guilib/GUITextLayout.cpp deleted file mode 100644 index 2eb676cd3b..0000000000 --- a/guilib/GUITextLayout.cpp +++ /dev/null @@ -1,628 +0,0 @@ -/* - * Copyright (C) 2005-2008 Team XBMC - * http://www.xbmc.org - * - * This Program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2, or (at your option) - * any later version. - * - * This Program 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with XBMC; see the file COPYING. If not, write to - * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. - * http://www.gnu.org/copyleft/gpl.html - * - */ - -#include "GUITextLayout.h" -#include "GUIFont.h" -#include "GUIControl.h" -#include "GUIColorManager.h" -#include "utils/CharsetConverter.h" -#include "StringUtils.h" - -using namespace std; - -#define WORK_AROUND_NEEDED_FOR_LINE_BREAKS - -CGUIString::CGUIString(iString start, iString end, bool carriageReturn) -{ - m_text.assign(start, end); - m_carriageReturn = carriageReturn; -} - -CStdString CGUIString::GetAsString() const -{ - CStdString text; - for (unsigned int i = 0; i < m_text.size(); i++) - text += (char)(m_text[i] & 0xff); - return text; -} - -CGUITextLayout::CGUITextLayout(CGUIFont *font, bool wrap, float fHeight, CGUIFont *borderFont) -{ - m_font = font; - m_borderFont = borderFont; - m_textColor = 0; - m_wrap = wrap; - m_maxHeight = fHeight; - m_textWidth = 0; - m_textHeight = 0; -} - -void CGUITextLayout::SetWrap(bool bWrap) -{ - m_wrap = bWrap; -} - -void CGUITextLayout::Render(float x, float y, float angle, color_t color, color_t shadowColor, uint32_t alignment, float maxWidth, bool solid) -{ - if (!m_font) - return; - - // set the main text color - if (m_colors.size()) - m_colors[0] = color; - - // render the text at the required location, angle, and size - if (angle) - { - static const float degrees_to_radians = 0.01745329252f; - g_graphicsContext.AddTransform(TransformMatrix::CreateZRotation(angle * degrees_to_radians, x, y, g_graphicsContext.GetScalingPixelRatio())); - } - // center our text vertically - if (alignment & XBFONT_CENTER_Y) - { - y -= m_font->GetTextHeight(m_lines.size()) * 0.5f;; - alignment &= ~XBFONT_CENTER_Y; - } - m_font->Begin(); - for (vector<CGUIString>::iterator i = m_lines.begin(); i != m_lines.end(); i++) - { - const CGUIString &string = *i; - uint32_t align = alignment; - if (align & XBFONT_JUSTIFIED && string.m_carriageReturn) - align &= ~XBFONT_JUSTIFIED; - if (solid) - m_font->DrawText(x, y, m_colors[0], shadowColor, string.m_text, align, maxWidth); - else - m_font->DrawText(x, y, m_colors, shadowColor, string.m_text, align, maxWidth); - y += m_font->GetLineHeight(); - } - m_font->End(); - if (angle) - g_graphicsContext.RemoveTransform(); -} - - -void CGUITextLayout::RenderScrolling(float x, float y, float angle, color_t color, color_t shadowColor, uint32_t alignment, float maxWidth, CScrollInfo &scrollInfo) -{ - if (!m_font) - return; - - // set the main text color - if (m_colors.size()) - m_colors[0] = color; - - // render the text at the required location, angle, and size - if (angle) - { - static const float degrees_to_radians = 0.01745329252f; - g_graphicsContext.AddTransform(TransformMatrix::CreateZRotation(angle * degrees_to_radians, x, y, g_graphicsContext.GetScalingPixelRatio())); - } - // center our text vertically - if (alignment & XBFONT_CENTER_Y) - { - y -= m_font->GetTextHeight(m_lines.size()) * 0.5f;; - alignment &= ~XBFONT_CENTER_Y; - } - m_font->Begin(); - // NOTE: This workaround is needed as otherwise multi-line text that scrolls - // will scroll in proportion to the number of lines. Ideally we should - // do the DrawScrollingText calculation here. This probably won't make - // any difference to the smoothness of scrolling though which will be - // jumpy with this sort of thing. It's not exactly a well used situation - // though, so this hack is probably OK. - float speed = scrollInfo.pixelSpeed; - for (vector<CGUIString>::iterator i = m_lines.begin(); i != m_lines.end(); i++) - { - const CGUIString &string = *i; - m_font->DrawScrollingText(x, y, m_colors, shadowColor, string.m_text, alignment, maxWidth, scrollInfo); - y += m_font->GetLineHeight(); - scrollInfo.pixelSpeed = 0; - } - scrollInfo.pixelSpeed = speed; - m_font->End(); - if (angle) - g_graphicsContext.RemoveTransform(); -} - -void CGUITextLayout::RenderOutline(float x, float y, color_t color, color_t outlineColor, uint32_t alignment, float maxWidth) -{ - if (!m_font) - return; - - // set the outline color - vecColors outlineColors; - if (m_colors.size()) - outlineColors.push_back(outlineColor); - - // center our text vertically - if (alignment & XBFONT_CENTER_Y) - { - y -= m_font->GetTextHeight(m_lines.size()) * 0.5f;; - alignment &= ~XBFONT_CENTER_Y; - } - if (m_borderFont) - { - float by = y; - m_borderFont->Begin(); - for (vector<CGUIString>::iterator i = m_lines.begin(); i != m_lines.end(); i++) - { - const CGUIString &string = *i; - uint32_t align = alignment; - if (align & XBFONT_JUSTIFIED && string.m_carriageReturn) - align &= ~XBFONT_JUSTIFIED; - - m_borderFont->DrawText(x, by, outlineColors, 0, string.m_text, align, maxWidth); - by += m_borderFont->GetLineHeight(); - } - m_borderFont->End(); - } - - // set the main text color - if (m_colors.size()) - m_colors[0] = color; - - m_font->Begin(); - for (vector<CGUIString>::iterator i = m_lines.begin(); i != m_lines.end(); i++) - { - const CGUIString &string = *i; - uint32_t align = alignment; - if (align & XBFONT_JUSTIFIED && string.m_carriageReturn) - align &= ~XBFONT_JUSTIFIED; - - m_font->DrawText(x, y, m_colors, 0, string.m_text, align, maxWidth); - y += m_font->GetLineHeight(); - } - m_font->End(); -} - -bool CGUITextLayout::Update(const CStdString &text, float maxWidth, bool forceUpdate /*= false*/, bool forceLTRReadingOrder /*= false*/) -{ - if (text == m_lastText && !forceUpdate) - return false; - - // convert to utf16 - CStdStringW utf16; - utf8ToW(text, utf16); - - // update - SetText(utf16, maxWidth, forceLTRReadingOrder); - - // and set our parameters to indicate no further update is required - m_lastText = text; - return true; -} - -void CGUITextLayout::SetText(const CStdStringW &text, float maxWidth, bool forceLTRReadingOrder /*= false*/) -{ - vecText parsedText; - - // empty out our previous string - m_lines.clear(); - m_colors.clear(); - m_colors.push_back(m_textColor); - - // parse the text into our string objects - ParseText(text, parsedText); - - // add \n to the end of the string - parsedText.push_back(L'\n'); - - // if we need to wrap the text, then do so - if (m_wrap && maxWidth > 0) - WrapText(parsedText, maxWidth); - else - LineBreakText(parsedText, m_lines); - - // remove any trailing blank lines - while (!m_lines.empty() && m_lines.back().m_text.empty()) - m_lines.pop_back(); - - BidiTransform(m_lines, forceLTRReadingOrder); - - // and cache the width and height for later reading - CalcTextExtent(); -} - -// BidiTransform is used to handle RTL text flipping in the string -void CGUITextLayout::BidiTransform(vector<CGUIString> &lines, bool forceLTRReadingOrder) -{ - for (unsigned int i=0; i<lines.size(); i++) - { - CGUIString &line = lines[i]; - - // reserve enough space in the flipped text - vecText flippedText; - flippedText.reserve(line.m_text.size()); - - character_t sectionStyle = 0xffff0000; // impossible to achieve - CStdStringW sectionText; - for (vecText::iterator it = line.m_text.begin(); it != line.m_text.end(); ++it) - { - character_t style = *it & 0xffff0000; - if (style != sectionStyle) - { - if (!sectionText.IsEmpty()) - { // style has changed, bidi flip text - CStdStringW sectionFlipped = BidiFlip(sectionText, forceLTRReadingOrder); - for (unsigned int j = 0; j < sectionFlipped.size(); j++) - flippedText.push_back(sectionStyle | sectionFlipped[j]); - } - sectionStyle = style; - sectionText.clear(); - } - sectionText.push_back( (wchar_t)(*it & 0xffff) ); - } - - // handle the last section - if (!sectionText.IsEmpty()) - { - CStdStringW sectionFlipped = BidiFlip(sectionText, forceLTRReadingOrder); - for (unsigned int j = 0; j < sectionFlipped.size(); j++) - flippedText.push_back(sectionStyle | sectionFlipped[j]); - } - - // replace the original line with the proccessed one - lines[i] = CGUIString(flippedText.begin(), flippedText.end(), line.m_carriageReturn); - } -} - -CStdStringW CGUITextLayout::BidiFlip(const CStdStringW &text, bool forceLTRReadingOrder) -{ - CStdStringA utf8text; - CStdStringW visualText; - - // convert to utf8, and back to utf16 with bidi flipping - g_charsetConverter.wToUTF8(text, utf8text); - g_charsetConverter.utf8ToW(utf8text, visualText, true, forceLTRReadingOrder); - - return visualText; -} - -void CGUITextLayout::Filter(CStdString &text) -{ - CStdStringW utf16; - utf8ToW(text, utf16); - vecColors colors; - vecText parsedText; - ParseText(utf16, 0, colors, parsedText); - utf16.Empty(); - for (unsigned int i = 0; i < parsedText.size(); i++) - utf16 += (wchar_t)(0xffff & parsedText[i]); - g_charsetConverter.wToUTF8(utf16, text); -} - -void CGUITextLayout::ParseText(const CStdStringW &text, vecText &parsedText) -{ - if (!m_font) - return; - ParseText(text, m_font->GetStyle(), m_colors, parsedText); -} - -void CGUITextLayout::ParseText(const CStdStringW &text, uint32_t defaultStyle, vecColors &colors, vecText &parsedText) -{ - // run through the string, searching for: - // [B] or [/B] -> toggle bold on and off - // [I] or [/I] -> toggle italics on and off - // [COLOR ffab007f] or [/COLOR] -> toggle color on and off - // [CAPS <option>] or [/CAPS] -> toggle capatilization on and off - - uint32_t currentStyle = defaultStyle; // start with the default font's style - color_t currentColor = 0; - - stack<color_t> colorStack; - colorStack.push(0); - - // these aren't independent, but that's probably not too much of an issue - // eg [UPPERCASE]Glah[LOWERCASE]FReD[/LOWERCASE]Georeg[/UPPERCASE] will work (lower case >> upper case) - // but [LOWERCASE]Glah[UPPERCASE]FReD[/UPPERCASE]Georeg[/LOWERCASE] won't -#define FONT_STYLE_UPPERCASE 4 -#define FONT_STYLE_LOWERCASE 8 - - int startPos = 0; - size_t pos = text.Find(L'['); - while (pos != CStdString::npos && pos + 1 < text.size()) - { - uint32_t newStyle = 0; - color_t newColor = currentColor; - bool newLine = false; - // have a [ - check if it's an ON or OFF switch - bool on(true); - int endPos = pos++; // finish of string - if (text[pos] == L'/') - { - on = false; - pos++; - } - // check for each type - if (text.Mid(pos,2) == L"B]") - { // bold - finish the current text block and assign the bold state - pos += 2; - if ((on && text.Find(L"[/B]",pos) >= 0) || // check for a matching end point - (!on && (currentStyle & FONT_STYLE_BOLD))) // or matching start point - newStyle = FONT_STYLE_BOLD; - } - else if (text.Mid(pos,2) == L"I]") - { // italics - pos += 2; - if ((on && text.Find(L"[/I]",pos) >= 0) || // check for a matching end point - (!on && (currentStyle & FONT_STYLE_ITALICS))) // or matching start point - newStyle = FONT_STYLE_ITALICS; - } - else if (text.Mid(pos,10) == L"UPPERCASE]") - { - pos += 10; - if ((on && text.Find(L"[/UPPERCASE]",pos) >= 0) || // check for a matching end point - (!on && (currentStyle & FONT_STYLE_UPPERCASE))) // or matching start point - newStyle = FONT_STYLE_UPPERCASE; - } - else if (text.Mid(pos,10) == L"LOWERCASE]") - { - pos += 10; - if ((on && text.Find(L"[/LOWERCASE]",pos) >= 0) || // check for a matching end point - (!on && (currentStyle & FONT_STYLE_LOWERCASE))) // or matching start point - newStyle = FONT_STYLE_LOWERCASE; - } - else if (text.Mid(pos,3) == L"CR]" && on) - { - newLine = true; - pos += 3; - } - else if (text.Mid(pos,5) == L"COLOR") - { // color - size_t finish = text.Find(L']', pos + 5); - if (on && finish != CStdString::npos && (size_t)text.Find(L"[/COLOR]",finish) != CStdString::npos) - { // create new color - newColor = colors.size(); - colors.push_back(g_colorManager.GetColor(text.Mid(pos + 5, finish - pos - 5))); - colorStack.push(newColor); - } - else if (!on && finish == pos + 5 && colorStack.size() > 1) - { // revert to previous color - colorStack.pop(); - newColor = colorStack.top(); - } - pos = finish + 1; - } - - if (newStyle || newColor != currentColor || newLine) - { // we have a new style or a new color, so format up the previous segment - CStdStringW subText = text.Mid(startPos, endPos - startPos); - if (currentStyle & FONT_STYLE_UPPERCASE) - subText.ToUpper(); - if (currentStyle & FONT_STYLE_LOWERCASE) - subText.ToLower(); - AppendToUTF32(subText, ((currentStyle & 3) << 24) | (currentColor << 16), parsedText); - if (newLine) - parsedText.push_back(L'\n'); - - // and switch to the new style - startPos = pos; - currentColor = newColor; - if (on) - currentStyle |= newStyle; - else - currentStyle &= ~newStyle; - } - pos = text.Find(L'[',pos); - } - // now grab the remainder of the string - CStdStringW subText = text.Mid(startPos, text.GetLength() - startPos); - if (currentStyle & FONT_STYLE_UPPERCASE) - subText.ToUpper(); - if (currentStyle & FONT_STYLE_LOWERCASE) - subText.ToLower(); - AppendToUTF32(subText, ((currentStyle & 3) << 24) | (currentColor << 16), parsedText); -} - -void CGUITextLayout::SetMaxHeight(float fHeight) -{ - m_maxHeight = fHeight; -} - -void CGUITextLayout::WrapText(const vecText &text, float maxWidth) -{ - if (!m_font) - return; - - int nMaxLines = (m_maxHeight > 0 && m_font->GetLineHeight() > 0)?(int)ceilf(m_maxHeight / m_font->GetLineHeight()):-1; - - m_lines.clear(); - - vector<CGUIString> lines; - LineBreakText(text, lines); - - for (unsigned int i = 0; i < lines.size(); i++) - { - const CGUIString &line = lines[i]; - vecText::const_iterator lastSpace = line.m_text.begin(); - vecText::const_iterator pos = line.m_text.begin(); - unsigned int lastSpaceInLine = 0; - vecText curLine; - while (pos != line.m_text.end() && (nMaxLines <= 0 || m_lines.size() < (size_t)nMaxLines)) - { - // Get the current letter in the string - character_t letter = *pos; - // check for a space - if (CanWrapAtLetter(letter)) - { - float width = m_font->GetTextWidth(curLine); - if (width > maxWidth) - { - if (lastSpace != line.m_text.begin() && lastSpaceInLine > 0) - { - CGUIString string(curLine.begin(), curLine.begin() + lastSpaceInLine, false); - m_lines.push_back(string); - // skip over spaces - pos = lastSpace; - while (pos != line.m_text.end() && IsSpace(*pos)) - pos++; - curLine.clear(); - lastSpaceInLine = 0; - lastSpace = line.m_text.begin(); - continue; - } - } - lastSpace = pos; - lastSpaceInLine = curLine.size(); - } - curLine.push_back(letter); - pos++; - } - // now add whatever we have left to the string - float width = m_font->GetTextWidth(curLine); - if (width > maxWidth) - { - // too long - put up to the last space on if we can + remove it from what's left. - if (lastSpace != line.m_text.begin() && lastSpaceInLine > 0) - { - CGUIString string(curLine.begin(), curLine.begin() + lastSpaceInLine, false); - m_lines.push_back(string); - curLine.erase(curLine.begin(), curLine.begin() + lastSpaceInLine); - while (curLine.size() && IsSpace(curLine.at(0))) - curLine.erase(curLine.begin()); - } - } - CGUIString string(curLine.begin(), curLine.end(), true); - m_lines.push_back(string); - } -} - -void CGUITextLayout::LineBreakText(const vecText &text, vector<CGUIString> &lines) -{ - int nMaxLines = (m_maxHeight > 0 && m_font && m_font->GetLineHeight() > 0)?(int)ceilf(m_maxHeight / m_font->GetLineHeight()):-1; - vecText::const_iterator lineStart = text.begin(); - vecText::const_iterator pos = text.begin(); - while (pos != text.end() && (nMaxLines <= 0 || lines.size() < (size_t)nMaxLines)) - { - // Get the current letter in the string - character_t letter = *pos; - - // Handle the newline character - if ((letter & 0xffff) == L'\n' ) - { // push back everything up till now - CGUIString string(lineStart, pos, true); - lines.push_back(string); - lineStart = pos + 1; - } - pos++; - } -} - -void CGUITextLayout::GetTextExtent(float &width, float &height) const -{ - width = m_textWidth; - height = m_textHeight; -} - -void CGUITextLayout::CalcTextExtent() -{ - m_textWidth = 0; - m_textHeight = 0; - if (!m_font) return; - - for (vector<CGUIString>::iterator i = m_lines.begin(); i != m_lines.end(); i++) - { - const CGUIString &string = *i; - float w = m_font->GetTextWidth(string.m_text); - if (w > m_textWidth) - m_textWidth = w; - } - m_textHeight = m_font->GetTextHeight(m_lines.size()); -} - -unsigned int CGUITextLayout::GetTextLength() const -{ - unsigned int length = 0; - for (vector<CGUIString>::const_iterator i = m_lines.begin(); i != m_lines.end(); i++) - length += i->m_text.size(); - return length; -} - -void CGUITextLayout::GetFirstText(vecText &text) const -{ - text.clear(); - if (m_lines.size()) - text = m_lines[0].m_text; -} - -float CGUITextLayout::GetTextWidth(const CStdStringW &text) const -{ - // NOTE: Assumes a single line of text - if (!m_font) return 0; - vecText utf32; - AppendToUTF32(text, (m_font->GetStyle() & 3) << 24, utf32); - return m_font->GetTextWidth(utf32); -} - -void CGUITextLayout::DrawText(CGUIFont *font, float x, float y, color_t color, color_t shadowColor, const CStdString &text, uint32_t align) -{ - if (!font) return; - vecText utf32; - AppendToUTF32(text, 0, utf32); - font->DrawText(x, y, color, shadowColor, utf32, align, 0); -} - -void CGUITextLayout::AppendToUTF32(const CStdStringW &utf16, character_t colStyle, vecText &utf32) -{ - // NOTE: Assumes a single line of text - utf32.reserve(utf32.size() + utf16.size()); - for (unsigned int i = 0; i < utf16.size(); i++) - utf32.push_back(utf16[i] | colStyle); -} - -void CGUITextLayout::utf8ToW(const CStdString &utf8, CStdStringW &utf16) -{ -#ifdef WORK_AROUND_NEEDED_FOR_LINE_BREAKS - // NOTE: This appears to strip \n characters from text. This may be a consequence of incorrect - // expression of the \n in utf8 (we just use character code 10) or it might be something - // more sinister. For now, we use the workaround below. - CStdStringArray multiLines; - StringUtils::SplitString(utf8, "\n", multiLines); - for (unsigned int i = 0; i < multiLines.size(); i++) - { - CStdStringW line; - // no need to bidiflip here - it's done in BidiTransform above - g_charsetConverter.utf8ToW(multiLines[i], line, false); - utf16 += line; - if (i < multiLines.size() - 1) - utf16.push_back(L'\n'); - } -#else - // no need to bidiflip here - it's done in BidiTransform above - g_charsetConverter.utf8ToW(utf8, utf16, false); -#endif -} - -void CGUITextLayout::AppendToUTF32(const CStdString &utf8, character_t colStyle, vecText &utf32) -{ - CStdStringW utf16; - utf8ToW(utf8, utf16); - AppendToUTF32(utf16, colStyle, utf32); -} - -void CGUITextLayout::Reset() -{ - m_lines.clear(); - m_lastText.Empty(); - m_textWidth = m_textHeight = 0; -} - - |