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path: root/core/src/fpdftext/fpdf_text_search.cpp
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Diffstat (limited to 'core/src/fpdftext/fpdf_text_search.cpp')
-rw-r--r--core/src/fpdftext/fpdf_text_search.cpp292
1 files changed, 0 insertions, 292 deletions
diff --git a/core/src/fpdftext/fpdf_text_search.cpp b/core/src/fpdftext/fpdf_text_search.cpp
deleted file mode 100644
index 5bbfbd9198..0000000000
--- a/core/src/fpdftext/fpdf_text_search.cpp
+++ /dev/null
@@ -1,292 +0,0 @@
-// Copyright 2014 PDFium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
-
-#include "core/include/fpdfapi/fpdf_page.h"
-#include "core/include/fpdfapi/fpdf_pageobj.h"
-#include "core/src/fpdftext/text_int.h"
-
-class CPDF_TextStream {
- public:
- CPDF_TextStream(CFX_WideTextBuf& buffer, FX_BOOL bUseLF)
- : m_Buffer(buffer), m_bUseLF(bUseLF), m_pLastObj(nullptr) {}
- ~CPDF_TextStream() {}
- FX_BOOL ProcessObject(const CPDF_TextObject* pObj, FX_BOOL bFirstLine);
-
- CFX_WideTextBuf& m_Buffer;
- FX_BOOL m_bUseLF;
- const CPDF_TextObject* m_pLastObj;
-};
-FX_BOOL FPDFText_IsSameTextObject(const CPDF_TextObject* pTextObj1,
- const CPDF_TextObject* pTextObj2) {
- if (!pTextObj1 || !pTextObj2) {
- return FALSE;
- }
- CFX_FloatRect rcPreObj(pTextObj2->m_Left, pTextObj2->m_Bottom,
- pTextObj2->m_Right, pTextObj2->m_Top);
- CFX_FloatRect rcCurObj(pTextObj1->m_Left, pTextObj1->m_Bottom,
- pTextObj1->m_Right, pTextObj1->m_Top);
- if (rcPreObj.IsEmpty() && rcCurObj.IsEmpty()) {
- return TRUE;
- }
- if (!rcPreObj.IsEmpty() || !rcCurObj.IsEmpty()) {
- rcPreObj.Intersect(rcCurObj);
- if (rcPreObj.IsEmpty()) {
- return FALSE;
- }
- if (FXSYS_fabs(rcPreObj.Width() - rcCurObj.Width()) >
- rcCurObj.Width() / 2) {
- return FALSE;
- }
- if (pTextObj2->GetFontSize() != pTextObj1->GetFontSize()) {
- return FALSE;
- }
- }
- int nPreCount = pTextObj2->CountItems();
- int nCurCount = pTextObj1->CountItems();
- if (nPreCount != nCurCount) {
- return FALSE;
- }
- for (int i = 0; i < nPreCount; i++) {
- CPDF_TextObjectItem itemPer, itemCur;
- pTextObj2->GetItemInfo(i, &itemPer);
- pTextObj1->GetItemInfo(i, &itemCur);
- if (itemCur.m_CharCode != itemPer.m_CharCode) {
- return FALSE;
- }
- }
- return TRUE;
-}
-int GetCharWidth(FX_DWORD charCode, CPDF_Font* pFont) {
- if (charCode == -1) {
- return 0;
- }
- int w = pFont->GetCharWidthF(charCode);
- if (w == 0) {
- CFX_ByteString str;
- pFont->AppendChar(str, charCode);
- w = pFont->GetStringWidth(str, 1);
- if (w == 0) {
- FX_RECT BBox;
- pFont->GetCharBBox(charCode, BBox);
- w = BBox.right - BBox.left;
- }
- }
- return w;
-}
-int FPDFText_ProcessInterObj(const CPDF_TextObject* pPrevObj,
- const CPDF_TextObject* pObj) {
- if (FPDFText_IsSameTextObject(pPrevObj, pObj)) {
- return -1;
- }
- CPDF_TextObjectItem item;
- int nItem = pPrevObj->CountItems();
- pPrevObj->GetItemInfo(nItem - 1, &item);
- FX_WCHAR preChar = 0, curChar = 0;
- CFX_WideString wstr =
- pPrevObj->GetFont()->UnicodeFromCharCode(item.m_CharCode);
- if (wstr.GetLength()) {
- preChar = wstr.GetAt(0);
- }
- FX_FLOAT last_pos = item.m_OriginX;
- int nLastWidth = GetCharWidth(item.m_CharCode, pPrevObj->GetFont());
- FX_FLOAT last_width = nLastWidth * pPrevObj->GetFontSize() / 1000;
- last_width = FXSYS_fabs(last_width);
- pObj->GetItemInfo(0, &item);
- wstr = pObj->GetFont()->UnicodeFromCharCode(item.m_CharCode);
- if (wstr.GetLength()) {
- curChar = wstr.GetAt(0);
- }
- int nThisWidth = GetCharWidth(item.m_CharCode, pObj->GetFont());
- FX_FLOAT this_width = nThisWidth * pObj->GetFontSize() / 1000;
- this_width = FXSYS_fabs(this_width);
- FX_FLOAT threshold =
- last_width > this_width ? last_width / 4 : this_width / 4;
- CFX_Matrix prev_matrix, prev_reverse;
- pPrevObj->GetTextMatrix(&prev_matrix);
- prev_reverse.SetReverse(prev_matrix);
- FX_FLOAT x = pObj->GetPosX(), y = pObj->GetPosY();
- prev_reverse.Transform(x, y);
- if (FXSYS_fabs(y) > threshold * 2) {
- return 2;
- }
- threshold = (FX_FLOAT)(nLastWidth > nThisWidth ? nLastWidth : nThisWidth);
- threshold = threshold > 400
- ? (threshold < 700 ? threshold / 4 : threshold / 5)
- : (threshold / 2);
- threshold *= nLastWidth > nThisWidth ? FXSYS_fabs(pPrevObj->GetFontSize())
- : FXSYS_fabs(pObj->GetFontSize());
- threshold /= 1000;
- if (FXSYS_fabs(last_pos + last_width - x) > threshold && curChar != L' ' &&
- preChar != L' ')
- if (curChar != L' ' && preChar != L' ') {
- if ((x - last_pos - last_width) > threshold ||
- (last_pos - x - last_width) > threshold) {
- return 1;
- }
- if (x < 0 && (last_pos - x - last_width) > threshold) {
- return 1;
- }
- if ((x - last_pos - last_width) > this_width ||
- (x - last_pos - this_width) > last_width) {
- return 1;
- }
- }
- if (last_pos + last_width > x + this_width && curChar == L' ') {
- return 3;
- }
- return 0;
-}
-FX_BOOL CPDF_TextStream::ProcessObject(const CPDF_TextObject* pObj,
- FX_BOOL bFirstLine) {
- CPDF_Font* pFont = pObj->GetFont();
- CFX_Matrix matrix;
- pObj->GetTextMatrix(&matrix);
- int item_index = 0;
- if (m_pLastObj) {
- int result = FPDFText_ProcessInterObj(m_pLastObj, pObj);
- if (result == 2) {
- int len = m_Buffer.GetLength();
- if (len && m_bUseLF && m_Buffer.GetBuffer()[len - 1] == L'-') {
- m_Buffer.Delete(len - 1, 1);
- } else {
- if (bFirstLine) {
- return TRUE;
- }
- if (m_bUseLF) {
- m_Buffer.AppendChar(L'\r');
- m_Buffer.AppendChar(L'\n');
- } else {
- m_Buffer.AppendChar(' ');
- }
- }
- } else if (result == 1) {
- m_Buffer.AppendChar(L' ');
- } else if (result == -1) {
- m_pLastObj = pObj;
- return FALSE;
- } else if (result == 3) {
- item_index = 1;
- }
- }
- m_pLastObj = pObj;
- int nItems = pObj->CountItems();
- FX_FLOAT Ignorekerning = 0;
- for (int i = 1; i < nItems - 1; i += 2) {
- CPDF_TextObjectItem item;
- pObj->GetItemInfo(i, &item);
- if (item.m_CharCode == (FX_DWORD)-1) {
- if (i == 1) {
- Ignorekerning = item.m_OriginX;
- } else if (Ignorekerning > item.m_OriginX) {
- Ignorekerning = item.m_OriginX;
- }
- } else {
- Ignorekerning = 0;
- break;
- }
- }
- FX_FLOAT spacing = 0;
- for (; item_index < nItems; item_index++) {
- CPDF_TextObjectItem item;
- pObj->GetItemInfo(item_index, &item);
- if (item.m_CharCode == (FX_DWORD)-1) {
- CFX_WideString wstr = m_Buffer.GetWideString();
- if (wstr.IsEmpty() || wstr.GetAt(wstr.GetLength() - 1) == L' ') {
- continue;
- }
- FX_FLOAT fontsize_h = pObj->m_TextState.GetFontSizeH();
- spacing = -fontsize_h * (item.m_OriginX - Ignorekerning) / 1000;
- continue;
- }
- FX_FLOAT charSpace = pObj->m_TextState.GetObject()->m_CharSpace;
- if (nItems > 3 && !spacing) {
- charSpace = 0;
- }
- if ((spacing || charSpace) && item_index > 0) {
- int last_width = 0;
- FX_FLOAT fontsize_h = pObj->m_TextState.GetFontSizeH();
- FX_DWORD space_charcode = pFont->CharCodeFromUnicode(' ');
- FX_FLOAT threshold = 0;
- if (space_charcode != -1) {
- threshold = fontsize_h * pFont->GetCharWidthF(space_charcode) / 1000;
- }
- if (threshold > fontsize_h / 3) {
- threshold = 0;
- } else {
- threshold /= 2;
- }
- if (threshold == 0) {
- threshold = fontsize_h;
- int this_width = FXSYS_abs(GetCharWidth(item.m_CharCode, pFont));
- threshold = this_width > last_width ? (FX_FLOAT)this_width
- : (FX_FLOAT)last_width;
- int nDivide = 6;
- if (threshold < 300) {
- nDivide = 2;
- } else if (threshold < 500) {
- nDivide = 4;
- } else if (threshold < 700) {
- nDivide = 5;
- }
- threshold = threshold / nDivide;
- threshold = fontsize_h * threshold / 1000;
- }
- if (charSpace > 0.001) {
- spacing += matrix.TransformDistance(charSpace);
- } else if (charSpace < -0.001) {
- spacing -= matrix.TransformDistance(FXSYS_fabs(charSpace));
- }
- if (threshold && (spacing && spacing >= threshold)) {
- m_Buffer.AppendChar(L' ');
- }
- if (item.m_CharCode == (FX_DWORD)-1) {
- continue;
- }
- spacing = 0;
- }
- CFX_WideString unicode_str = pFont->UnicodeFromCharCode(item.m_CharCode);
- if (unicode_str.IsEmpty()) {
- m_Buffer.AppendChar((FX_WCHAR)item.m_CharCode);
- } else {
- m_Buffer << unicode_str;
- }
- }
- return FALSE;
-}
-void GetTextStream_Unicode(CFX_WideTextBuf& buffer,
- CPDF_PageObjectList* pPage,
- FX_BOOL bUseLF) {
- CPDF_TextStream textstream(buffer, bUseLF);
- FX_POSITION pos = pPage->GetFirstObjectPosition();
- while (pos) {
- CPDF_PageObject* pObject = pPage->GetNextObject(pos);
- if (pObject && pObject->m_Type == CPDF_PageObject::TEXT)
- textstream.ProcessObject((CPDF_TextObject*)pObject, FALSE);
- }
-}
-CFX_WideString PDF_GetFirstTextLine_Unicode(CPDF_Document* pDoc,
- CPDF_Dictionary* pPage) {
- CFX_WideTextBuf buffer;
- buffer.EstimateSize(0, 1024);
- CPDF_Page page;
- page.Load(pDoc, pPage);
- CPDF_ParseOptions options;
- options.m_bTextOnly = TRUE;
- options.m_bSeparateForm = FALSE;
- page.ParseContent(&options);
- CPDF_TextStream textstream(buffer, FALSE);
- FX_POSITION pos = page.GetFirstObjectPosition();
- while (pos) {
- CPDF_PageObject* pObject = page.GetNextObject(pos);
- if (pObject->m_Type != CPDF_PageObject::TEXT) {
- continue;
- }
- if (textstream.ProcessObject((CPDF_TextObject*)pObject, TRUE)) {
- break;
- }
- }
- return buffer.GetWideString();
-}
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